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git-subtree-dir: examples/knx-cc1310/coresdk_cc13xx_cc26xx git-subtree-split: 0d78d3280357416a5c0388148cda13717c9ffaa5
972 lines
36 KiB
C
972 lines
36 KiB
C
/*
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* Copyright (c) 2016-2018, Texas Instruments Incorporated
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of Texas Instruments Incorporated nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdint.h>
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/* Kernel services */
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#include <ti/drivers/dpl/ClockP.h>
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#include <ti/drivers/dpl/DebugP.h>
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#include <ti/drivers/dpl/HwiP.h>
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#include <ti/drivers/dpl/SemaphoreP.h>
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#include <ti/drivers/dpl/SwiP.h>
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/* TI-RTOS drivers */
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#include <ti/drivers/ADCBuf.h>
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#include <ti/drivers/adcbuf/ADCBufCC26XX.h>
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#include <ti/drivers/PIN.h>
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#include <ti/drivers/pin/PINCC26XX.h>
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#include <ti/drivers/dma/UDMACC26XX.h>
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#include <ti/drivers/timer/GPTimerCC26XX.h>
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#include <ti/drivers/Power.h>
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#include <ti/drivers/power/PowerCC26XX.h>
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#include <ti/devices/DeviceFamily.h>
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#include DeviceFamily_constructPath(inc/hw_memmap.h)
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#include DeviceFamily_constructPath(inc/hw_ints.h)
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#include DeviceFamily_constructPath(inc/hw_types.h)
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#include DeviceFamily_constructPath(inc/hw_aux_evctl.h)
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#include DeviceFamily_constructPath(driverlib/aux_adc.h)
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#include DeviceFamily_constructPath(driverlib/aux_smph.h)
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#include DeviceFamily_constructPath(driverlib/sys_ctrl.h)
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#include DeviceFamily_constructPath(driverlib/ioc.h)
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#include DeviceFamily_constructPath(driverlib/aon_ioc.h)
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#if (DeviceFamily_PARENT == DeviceFamily_PARENT_CC13X0_CC26X0)
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#include DeviceFamily_constructPath(driverlib/aux_wuc.h)
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#elif (DeviceFamily_PARENT == DeviceFamily_PARENT_CC13X2_CC26X2)
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#define AUX_EVCTL_DMACTL_SEL_FIFO_NOT_EMPTY AUX_EVCTL_DMACTL_SEL_AUX_ADC_FIFO_NOT_EMPTY
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#define AUX_EVCTL_EVTOMCUFLAGS_ADC_DONE AUX_EVCTL_EVTOMCUFLAGS_AUX_ADC_DONE
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#define AUX_EVCTL_EVTOMCUFLAGS_ADC_IRQ AUX_EVCTL_EVTOMCUFLAGS_AUX_ADC_IRQ
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#endif
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/*
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* =============================================================================
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* Public Function Declarations
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* =============================================================================
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*/
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void ADCBufCC26XX_init(ADCBuf_Handle handle);
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ADCBuf_Handle ADCBufCC26XX_open(ADCBuf_Handle handle, const ADCBuf_Params *params);
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int_fast16_t ADCBufCC26XX_convert(ADCBuf_Handle handle, ADCBuf_Conversion conversions[], uint_fast8_t channelCount);
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int_fast16_t ADCBufCC26XX_convertCancel(ADCBuf_Handle handle);
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void ADCBufCC26XX_close(ADCBuf_Handle handle);
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uint_fast8_t ADCBufCC26XX_getResolution(ADCBuf_Handle handle);
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int_fast16_t ADCBufCC26XX_adjustRawValues(ADCBuf_Handle handle, void *sampleBuffer, uint_fast16_t sampleCount, uint32_t adcChannel);
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int_fast16_t ADCBufCC26XX_convertAdjustedToMicroVolts(ADCBuf_Handle handle, uint32_t adcChannel, void *adjustedSampleBuffer, uint32_t outputMicroVoltBuffer[], uint_fast16_t sampleCount);
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int_fast16_t ADCBufCC26XX_control(ADCBuf_Handle handle, uint_fast16_t cmd, void *arg);
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/*
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* =============================================================================
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* Private Function Declarations
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* =============================================================================
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*/
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static bool ADCBufCC26XX_acquireADCSemaphore(ADCBuf_Handle handle);
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static bool ADCBufCC26XX_releaseADCSemaphore(ADCBuf_Handle handle);
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static void ADCBufCC26XX_configDMA(ADCBuf_Handle handle, ADCBuf_Conversion *conversion);
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static void ADCBufCC26XX_hwiFxn (uintptr_t arg);
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static void ADCBufCC26XX_swiFxn (uintptr_t arg0, uintptr_t arg1);
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static void ADCBufCC26XX_conversionCallback(ADCBuf_Handle handle, ADCBuf_Conversion *conversion, void *completedADCBuffer, uint32_t completedChannel);
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static uint32_t ADCBufCC26XX_freqToCounts(uint32_t frequency);
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static void ADCBufCC26XX_configGPTDMA(ADCBuf_Handle handle, ADCBuf_Conversion *conversion);
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static void ADCBufCC26XX_cleanADC(ADCBuf_Handle handle);
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static void ADCBufCC26XX_loadDMAControlTableEntry(ADCBuf_Handle handle, ADCBuf_Conversion *conversion, bool primaryEntry);
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static void ADCBufCC26XX_loadGPTDMAControlTableEntry(ADCBuf_Handle handle, ADCBuf_Conversion *conversion, bool primaryEntry);
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/*
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* =============================================================================
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* Constants
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* =============================================================================
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*/
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const ADCBuf_FxnTable ADCBufCC26XX_fxnTable = {
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/*! Function to close the specified peripheral */
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ADCBufCC26XX_close,
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/*! Function to driver implementation specific control function */
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ADCBufCC26XX_control,
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/*! Function to initialize the given data object */
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ADCBufCC26XX_init,
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/*! Function to open the specified peripheral */
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ADCBufCC26XX_open,
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/*! Function to start an ADC conversion with the specified peripheral */
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ADCBufCC26XX_convert,
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/*! Function to abort a conversion being carried out by the specified peripheral */
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ADCBufCC26XX_convertCancel,
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/*! Function to get the resolution in bits of the ADC */
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ADCBufCC26XX_getResolution,
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/*! Function to adjust raw ADC output values to values comparable between devices of the same type */
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ADCBufCC26XX_adjustRawValues,
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/*! Function to convert adjusted ADC values to microvolts */
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ADCBufCC26XX_convertAdjustedToMicroVolts
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};
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/*
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* =============================================================================
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* Private Global Variables
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* =============================================================================
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*/
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/* Allocate space for DMA control table entry */
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ALLOCATE_CONTROL_TABLE_ENTRY(dmaADCPriControlTableEntry, (UDMA_CHAN_AUX_ADC + UDMA_PRI_SELECT));
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ALLOCATE_CONTROL_TABLE_ENTRY(dmaADCAltControlTableEntry, (UDMA_CHAN_AUX_ADC + UDMA_ALT_SELECT));
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ALLOCATE_CONTROL_TABLE_ENTRY(dmaGPT0APriControlTableEntry, (UDMA_CHAN_TIMER0_A + UDMA_PRI_SELECT));
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ALLOCATE_CONTROL_TABLE_ENTRY(dmaGPT0AAltControlTableEntry, (UDMA_CHAN_TIMER0_A + UDMA_ALT_SELECT));
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/*!
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* Timeout interrupt bitmask of the GPT that the DMA copies into GPT_O_ICLR
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* to bring the DMA trigger event low.
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* Needs to go into RAM not flash to prevent system from hanging in edge cases.
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*/
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static uint8_t gptClear = GPT_ICLR_TATOCINT;
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/*
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* =============================================================================
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* Function Definitions
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* =============================================================================
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*/
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/*
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* ======== ADCBufCC26XX_init ========
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*/
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void ADCBufCC26XX_init(ADCBuf_Handle handle) {
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ADCBufCC26XX_Object *object;
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/* Get the pointer to the object */
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object = handle->object;
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/* Mark the object as available */
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object->isOpen = false;
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}
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/*
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* ======== ADCBufCC26XX_open ========
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*/
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ADCBuf_Handle ADCBufCC26XX_open(ADCBuf_Handle handle,
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const ADCBuf_Params *params) {
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/* Use union to save on stack allocation */
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union {
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HwiP_Params hwiParams;
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SwiP_Params swiParams;
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GPTimerCC26XX_Params timerParams;
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} paramsUnion;
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ADCBufCC26XX_Object *object;
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ADCBufCC26XX_HWAttrs const *hwAttrs;
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uint32_t key;
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uint32_t adcPeriodCounts;
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/* Get the pointer to the object and hwAttrs */
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object = handle->object;
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hwAttrs = handle->hwAttrs;
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/* Disable preemption while checking if the ADC is open. */
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key = HwiP_disable();
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/* Check if the ADC is open already with the base addr. */
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if (object->isOpen == true) {
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HwiP_restore(key);
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DebugP_log0("ADCBuf: already in use.");
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return (NULL);
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}
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/* Mark the handle as being used */
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object->isOpen = true;
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/* On Chameleon, ANAIF must be clocked to use it. On Agama, the register inferface is always available. */
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#if (DeviceFamily_PARENT == DeviceFamily_PARENT_CC13X0_CC26X0)
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/* Turn on the ANAIF clock. ANIAF contains the AUX ADC. */
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AUXWUCClockEnable(AUX_WUC_ANAIF_CLOCK);
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AUXWUCClockEnable(AUX_WUC_ADI_CLOCK);
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#endif
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HwiP_restore(key);
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/* Initialise the ADC object */
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/* Initialise params section of object */
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object->conversionInProgress = false;
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object->semaphoreTimeout = params->blockingTimeout;
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object->samplingFrequency = params->samplingFrequency;
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object->returnMode = params->returnMode;
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object->recurrenceMode = params->recurrenceMode;
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object->keepADCSemaphore = false;
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object->adcSemaphoreInPossession = false;
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if (params->custom) {
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/* If CC26XX specific params were specified, use them */
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object->samplingDuration = ((ADCBufCC26XX_ParamsExtension *)(params->custom))->samplingDuration;
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object->refSource = ((ADCBufCC26XX_ParamsExtension *)(params->custom))->refSource;
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object->samplingMode = ((ADCBufCC26XX_ParamsExtension *)(params->custom))->samplingMode;
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object->inputScalingEnabled = ((ADCBufCC26XX_ParamsExtension *)(params->custom))->inputScalingEnabled;
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}
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else {
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/* Initialise CC26XX specific settings to defaults */
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object->inputScalingEnabled = true;
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object->refSource = ADCBufCC26XX_FIXED_REFERENCE;
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object->samplingMode = ADCBufCC26XX_SAMPING_MODE_SYNCHRONOUS;
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object->samplingDuration = ADCBufCC26XX_SAMPLING_DURATION_2P7_US;
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}
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/* Open timer resource */
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GPTimerCC26XX_Params_init(¶msUnion.timerParams);
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paramsUnion.timerParams.width = GPT_CONFIG_16BIT;
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paramsUnion.timerParams.mode = GPT_MODE_PERIODIC_UP;
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paramsUnion.timerParams.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
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/* Open position 0 of the GPT config table - by convention this is timer 0A. */
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object->timerHandle = GPTimerCC26XX_open(0, ¶msUnion.timerParams);
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if (object->timerHandle == NULL) {
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/* We did not manage to open the GPTimer we wanted */
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return NULL;
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}
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adcPeriodCounts = ADCBufCC26XX_freqToCounts(params->samplingFrequency);
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GPTimerCC26XX_setLoadValue(object->timerHandle, adcPeriodCounts);
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GPTimerCC26XX_enableInterrupt(object->timerHandle, GPT_INT_TIMEOUT);
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if (params->returnMode == ADCBuf_RETURN_MODE_BLOCKING) {
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/* Continuous trigger mode and blocking return mode is an illegal combination */
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DebugP_assert(!(params->recurrenceMode == ADCBuf_RECURRENCE_MODE_CONTINUOUS));
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/* Create a semaphore to block task execution for the duration of the ADC conversions */
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SemaphoreP_constructBinary(&(object->conversionComplete), 0);
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/* Store internal callback function */
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object->callbackFxn = ADCBufCC26XX_conversionCallback;
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}
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else {
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/* Callback mode without a callback function defined */
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DebugP_assert(params->callbackFxn);
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/* Save the callback function pointer */
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object->callbackFxn = params->callbackFxn;
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}
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/* Create the Hwi for this ADC peripheral. */
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HwiP_Params_init(¶msUnion.hwiParams);
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paramsUnion.hwiParams.arg = (uintptr_t) handle;
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paramsUnion.hwiParams.priority = hwAttrs->intPriority;
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HwiP_construct(&(object->hwi), INT_AUX_ADC_IRQ, ADCBufCC26XX_hwiFxn, ¶msUnion.hwiParams);
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/* Create the Swi object for this ADC peripheral */
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SwiP_Params_init(¶msUnion.swiParams);
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paramsUnion.swiParams.arg0 = (uintptr_t)handle;
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paramsUnion.swiParams.priority = hwAttrs->swiPriority;
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SwiP_construct(&(object->swi), ADCBufCC26XX_swiFxn, &(paramsUnion.swiParams));
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/* Declare the dependency on the UDMA driver */
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object->udmaHandle = UDMACC26XX_open();
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/* Return the handle after finishing initialisation of the driver */
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DebugP_log0("ADC: opened");
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return handle;
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}
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/*!
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* @brief HWI ISR of the ADC triggered when the DMA transaction is complete
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*
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* @param arg An ADCBufCC26XX_Handle
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*
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*/
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static void ADCBufCC26XX_hwiFxn (uintptr_t arg) {
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ADCBufCC26XX_Object *object;
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ADCBuf_Conversion *conversion;
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uint32_t intStatus;
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/* Get the pointer to the object and current conversion*/
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object = ((ADCBuf_Handle)arg)->object;
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conversion = object->currentConversion;
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/* Set activeSampleBuffer to primary as default */
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object->activeSampleBuffer = conversion->sampleBuffer;
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if (object->recurrenceMode == ADCBuf_RECURRENCE_MODE_ONE_SHOT) {
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/* Disable the ADC */
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AUXADCDisable();
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/* Disable ADC DMA if we are only doing one conversion and clear DMA done interrupt. */
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HWREG(AUX_EVCTL_BASE + AUX_EVCTL_O_DMACTL) = AUX_EVCTL_DMACTL_REQ_MODE_SINGLE | AUX_EVCTL_DMACTL_SEL_FIFO_NOT_EMPTY ;
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}
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else if (object->recurrenceMode == ADCBuf_RECURRENCE_MODE_CONTINUOUS) {
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/* Reload the finished DMA control table entry */
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if (HWREG(UDMA0_BASE + UDMA_O_SETCHNLPRIALT) & (1 << UDMA_CHAN_AUX_ADC)) {
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/* We are currently using the alternate entry -> we just finished the primary entry -> reload primary entry */
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ADCBufCC26XX_loadDMAControlTableEntry((ADCBuf_Handle)arg, conversion, true);
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ADCBufCC26XX_loadGPTDMAControlTableEntry((ADCBuf_Handle)arg, conversion, true);
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}
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else {
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/* We are currently using the primary entry -> we just finished the alternate entry -> reload the alternate entry */
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ADCBufCC26XX_loadDMAControlTableEntry((ADCBuf_Handle)arg, conversion, false);
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ADCBufCC26XX_loadGPTDMAControlTableEntry((ADCBuf_Handle)arg, conversion, false);
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object->activeSampleBuffer = conversion->sampleBufferTwo;
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}
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}
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/* Clear DMA interrupts */
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UDMACC26XX_clearInterrupt(object->udmaHandle, (1 << UDMA_CHAN_AUX_ADC) | (1 << UDMA_CHAN_TIMER0_A));
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/* Get the status of the ADC_IRQ line and ADC_DONE */
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intStatus = HWREG(AUX_EVCTL_BASE + AUX_EVCTL_O_EVTOMCUFLAGS) & (AUX_EVCTL_EVTOMCUFLAGS_ADC_IRQ | AUX_EVCTL_EVTOMCUFLAGS_ADC_DONE);
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/* Clear the ADC_IRQ flag if it triggered the ISR */
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HWREG(AUX_EVCTL_BASE + AUX_EVCTL_O_EVTOMCUFLAGSCLR) = intStatus;
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/* Post SWI to handle remaining clean up and invocation of callback */
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SwiP_post(&(object->swi));
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}
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/*!
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* @brief SWI ISR of the ADC triggered when the DMA transaction is complete
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*
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* @param arg0 An ADCBufCC26XX_Handle
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*
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*/
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static void ADCBufCC26XX_swiFxn (uintptr_t arg0, uintptr_t arg1) {
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uint32_t key;
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ADCBuf_Conversion *conversion;
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ADCBufCC26XX_Object *object;
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uint16_t *sampleBuffer;
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uint8_t channel;
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/* Get the pointer to the object */
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object = ((ADCBuf_Handle)arg0)->object;
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DebugP_log0("ADC: swi interrupt context start");
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/* Disable interrupts */
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key = HwiP_disable();
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/* Use a temporary pointers in case the callback function
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* attempts to perform another ADCBuf_transfer call
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*/
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conversion = object->currentConversion;
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sampleBuffer = object->activeSampleBuffer;
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channel = object->currentChannel;
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if (object->recurrenceMode == ADCBuf_RECURRENCE_MODE_ONE_SHOT) {
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/* Clean up ADC and DMA */
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ADCBufCC26XX_cleanADC(((ADCBuf_Handle)arg0));
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/* Indicate we are done with this transfer */
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object->currentConversion = NULL;
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}
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/* Restore interrupts */
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HwiP_restore(key);
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/* Perform callback */
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object->callbackFxn((ADCBuf_Handle)arg0, conversion, sampleBuffer, channel);
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DebugP_log0("ADC: swi interrupt context end");
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}
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/*!
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* @brief CC26XX internal callback function that posts the semaphore in blocking mode
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*
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* @param handle An ADCBufCC26XX_Handle
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*
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* @param conversion A pointer to the current ADCBuf_Conversion
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*
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*/
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static void ADCBufCC26XX_conversionCallback(ADCBuf_Handle handle, ADCBuf_Conversion *conversion, void *completedADCBuffer, uint32_t completedChannel) {
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ADCBufCC26XX_Object *object;
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DebugP_log0("ADC DMA: posting conversionComplete semaphore");
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/* Get the pointer to the object */
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object = handle->object;
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/* Post the semaphore */
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SemaphoreP_post(&(object->conversionComplete));
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}
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/*
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* ======== ADCBufCC26XX_convert ========
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*/
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int_fast16_t ADCBufCC26XX_convert(ADCBuf_Handle handle, ADCBuf_Conversion conversions[], uint_fast8_t channelCount) {
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uint32_t key;
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ADCBufCC26XX_Object *object;
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ADCBufCC26XX_HWAttrs const *hwAttrs;
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PIN_Config adcPinTable[2];
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uint8_t i = 0;
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DebugP_assert(handle);
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/* Get the pointer to the object */
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object = handle->object;
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hwAttrs = handle->hwAttrs;
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DebugP_assert(channelCount == 1);
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DebugP_assert((conversions->samplesRequestedCount <= UDMA_XFER_SIZE_MAX));
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DebugP_assert(conversions->sampleBuffer);
|
|
DebugP_assert(!(object->recurrenceMode == (ADCBuf_RECURRENCE_MODE_CONTINUOUS && !(conversions->sampleBufferTwo))));
|
|
|
|
/* Disable interrupts */
|
|
key = HwiP_disable();
|
|
|
|
/* Check if ADC is open and that no other transfer is in progress */
|
|
if (!(object->isOpen) || object->conversionInProgress) {
|
|
/* Restore interrupts */
|
|
HwiP_restore(key);
|
|
DebugP_log0("ADCBuf: conversion failed");
|
|
return ADCBuf_STATUS_ERROR;
|
|
}
|
|
object->conversionInProgress = true;
|
|
|
|
/* Restore interrupts*/
|
|
HwiP_restore(key);
|
|
|
|
/* Specify input in ADC module */
|
|
AUXADCSelectInput(hwAttrs->adcChannelLut[conversions->adcChannel].compBInput);
|
|
|
|
/* Add pin to measure on */
|
|
adcPinTable[i++] = (hwAttrs->adcChannelLut[conversions->adcChannel].dio) |
|
|
PIN_NOPULL |
|
|
PIN_INPUT_DIS |
|
|
PIN_GPIO_OUTPUT_DIS |
|
|
PIN_IRQ_DIS |
|
|
PIN_DRVSTR_MIN;
|
|
|
|
/* Terminate pin list */
|
|
adcPinTable[i] = PIN_TERMINATE;
|
|
object->pinHandle = PIN_open(&object->pinState, adcPinTable);
|
|
if (!object->pinHandle) {
|
|
object->conversionInProgress = false;
|
|
return ADCBuf_STATUS_ERROR;
|
|
}
|
|
|
|
/* Save which channel we are converting on for the callbackFxn */
|
|
object->currentChannel = conversions->adcChannel;
|
|
|
|
/* Try to acquire the ADC semaphore if we do not already have it. */
|
|
if (object->adcSemaphoreInPossession == false) {
|
|
if (!AUXSMPHTryAcquire(AUX_SMPH_2)) {
|
|
PIN_close(object->pinHandle);
|
|
object->conversionInProgress = false;
|
|
DebugP_log0("ADCBuf: failed to acquire semaphore");
|
|
return ADCBuf_STATUS_ERROR;
|
|
}
|
|
object->adcSemaphoreInPossession = true;
|
|
}
|
|
|
|
/* Store location of the current conversion */
|
|
object->currentConversion = conversions;
|
|
|
|
/* Configure and arm the DMA and AUX DMA control */
|
|
ADCBufCC26XX_configDMA(handle, conversions);
|
|
|
|
/* Configure and arm the GPT DMA channel to clear the level-based GPT IRQ signal */
|
|
ADCBufCC26XX_configGPTDMA(handle, conversions);
|
|
|
|
/* Flush the ADC FIFO in case we have triggered prior to this call */
|
|
AUXADCFlushFifo();
|
|
|
|
/* If input scaling is set to disabled in the params, disable it */
|
|
if (!object->inputScalingEnabled) {
|
|
AUXADCDisableInputScaling();
|
|
}
|
|
|
|
/* Arm the ADC in preparation for incoming conversion triggers */
|
|
if (object->samplingMode == ADCBufCC26XX_SAMPING_MODE_SYNCHRONOUS) {
|
|
/* ADCBufCC26XX_SYNCHRONOUS sampling mode */
|
|
AUXADCEnableSync(object->refSource, object->samplingDuration, AUXADC_TRIGGER_GPT0A);
|
|
}
|
|
else {
|
|
/* ADCBufCC26XX_ASYNCHRONOUS sampling mode */
|
|
AUXADCEnableAsync(object->refSource, AUXADC_TRIGGER_GPT0A);
|
|
}
|
|
|
|
/* Start the GPTimer to create ADC triggers */
|
|
GPTimerCC26XX_start(object->timerHandle);
|
|
|
|
/* Set constraints to guarantee operation */
|
|
Power_setConstraint(PowerCC26XX_DISALLOW_STANDBY);
|
|
|
|
if (object->returnMode == ADCBuf_RETURN_MODE_BLOCKING) {
|
|
DebugP_log0("ADCBuf: transfer pending on conversionComplete "
|
|
"semaphore");
|
|
|
|
if (SemaphoreP_OK != SemaphoreP_pend(&(object->conversionComplete),
|
|
object->semaphoreTimeout)) {
|
|
/* Cancel the transfer if we experience a timeout */
|
|
ADCBufCC26XX_convertCancel(handle);
|
|
/*
|
|
* ADCBufCC26XX_convertCancel peforms a callback which posts a
|
|
* conversionComplete semaphore. This call consumes this extra post.
|
|
*/
|
|
SemaphoreP_pend(&(object->conversionComplete), SemaphoreP_NO_WAIT);
|
|
return ADCBuf_STATUS_ERROR;
|
|
}
|
|
}
|
|
|
|
|
|
return ADCBuf_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
* ======== ADCBufCC26XX_convertCancel ========
|
|
*/
|
|
int_fast16_t ADCBufCC26XX_convertCancel(ADCBuf_Handle handle) {
|
|
ADCBufCC26XX_Object *object;
|
|
ADCBuf_Conversion *conversion;
|
|
|
|
DebugP_assert(handle);
|
|
|
|
/* Get the pointer to the object and hwAttrs*/
|
|
object = handle->object;
|
|
|
|
/* Check if ADC is open and that no other transfer is in progress */
|
|
if (!(object->conversionInProgress)) {
|
|
DebugP_log0("ADCBuf: a conversion must be in progress to cancel one");
|
|
return ADCBuf_STATUS_ERROR;
|
|
}
|
|
|
|
/* Stop triggering a conversion on trigger events */
|
|
AUXADCDisable();
|
|
|
|
/* Set hardware and software configuration to default and turn off driver */
|
|
ADCBufCC26XX_cleanADC(handle);
|
|
|
|
/* Use a temporary transaction pointer in case the callback function
|
|
* attempts to perform another ADCBuf_convert call
|
|
*/
|
|
conversion = object->currentConversion;
|
|
|
|
/* Perform callback if we are in one-shot mode. In continuous mode, ADCBuf_convertCancel will probably be called from the callback functon itself. No need to call it again. */
|
|
if (object->recurrenceMode == ADCBuf_RECURRENCE_MODE_ONE_SHOT) {
|
|
object->callbackFxn(handle, conversion, conversion->sampleBuffer, object->currentChannel);
|
|
}
|
|
|
|
return ADCBuf_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
* ======== ADCBufCC26XX_close ========
|
|
*/
|
|
void ADCBufCC26XX_close(ADCBuf_Handle handle) {
|
|
ADCBufCC26XX_Object *object;
|
|
|
|
DebugP_assert(handle);
|
|
|
|
/* Get the pointer to the object */
|
|
object = handle->object;
|
|
|
|
/* Check if the ADC is running and abort conversion if necessary. */
|
|
if (object->conversionInProgress) {
|
|
ADCBuf_convertCancel(handle);
|
|
}
|
|
|
|
/* Get the pointer to the object */
|
|
object = handle->object;
|
|
|
|
/* Release the uDMA dependency and potentially power down uDMA. */
|
|
UDMACC26XX_close(object->udmaHandle);
|
|
|
|
/* Destroy the Hwi */
|
|
HwiP_destruct(&(object->hwi));
|
|
|
|
/* Destroy the Swi */
|
|
SwiP_destruct(&(object->swi));
|
|
|
|
/* Close the timer */
|
|
GPTimerCC26XX_close(object->timerHandle);
|
|
|
|
if (object->returnMode == ADCBuf_RETURN_MODE_BLOCKING) {
|
|
SemaphoreP_destruct(&(object->conversionComplete));
|
|
}
|
|
|
|
/* Mark the module as available */
|
|
object->isOpen = false;
|
|
|
|
DebugP_log0("ADCBuf: closed");
|
|
}
|
|
|
|
/*
|
|
* ======== ADCBufCC26XX_getResolution ========
|
|
*/
|
|
uint_fast8_t ADCBufCC26XX_getResolution(ADCBuf_Handle handle) {
|
|
return (ADCBufCC26XX_RESOLUTION);
|
|
}
|
|
|
|
|
|
/*
|
|
* ======== ADCBufCC26XX_adjustRawValues ========
|
|
*/
|
|
int_fast16_t ADCBufCC26XX_adjustRawValues(ADCBuf_Handle handle, void *sampleBuffer, uint_fast16_t sampleCount, uint32_t adcChannel) {
|
|
ADCBufCC26XX_Object *object;
|
|
uint32_t gain;
|
|
uint32_t offset;
|
|
uint16_t i;
|
|
|
|
object = handle->object;
|
|
|
|
gain = AUXADCGetAdjustmentGain(object->refSource);
|
|
offset = AUXADCGetAdjustmentOffset(object->refSource);
|
|
|
|
for (i = 0; i < sampleCount; i++) {
|
|
uint16_t tmpRawADCVal = ((uint16_t *)sampleBuffer)[i];
|
|
((uint16_t *)sampleBuffer)[i] = AUXADCAdjustValueForGainAndOffset(tmpRawADCVal, gain, offset);
|
|
}
|
|
|
|
return ADCBuf_STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* ======== ADCBufCC26XX_convertAdjustedToMicroVolts ========
|
|
*/
|
|
int_fast16_t ADCBufCC26XX_convertAdjustedToMicroVolts(ADCBuf_Handle handle, uint32_t adcChannel, void *adjustedSampleBuffer, uint32_t outputMicroVoltBuffer[], uint_fast16_t sampleCount) {
|
|
ADCBufCC26XX_Object *object;
|
|
uint16_t i;
|
|
uint32_t voltageRef;
|
|
|
|
object = handle->object;
|
|
|
|
voltageRef = (object->inputScalingEnabled) ? AUXADC_FIXED_REF_VOLTAGE_NORMAL : AUXADC_FIXED_REF_VOLTAGE_UNSCALED;
|
|
|
|
for (i = 0; i < sampleCount; i++) {
|
|
outputMicroVoltBuffer[i] = AUXADCValueToMicrovolts(voltageRef, ((uint16_t *)adjustedSampleBuffer)[i]);
|
|
}
|
|
|
|
return ADCBuf_STATUS_SUCCESS;
|
|
}
|
|
|
|
/*!
|
|
* @brief Function to configure the DMA to automatically transfer ADC output data into a provided array
|
|
*
|
|
* @pre ADCBufCC26XX_open() has to be called first.
|
|
*
|
|
* @pre There must not currently be a conversion in progress
|
|
*
|
|
* @param handle An ADCBufCC26XX handle returned from ADCBufCC26XX_open()
|
|
*
|
|
* @param conversion A pointer to an ADCBuf_Conversion
|
|
*
|
|
*/
|
|
static void ADCBufCC26XX_configDMA(ADCBuf_Handle handle, ADCBuf_Conversion *conversion) {
|
|
ADCBufCC26XX_Object *object;
|
|
|
|
/* Get the pointer to the object */
|
|
object = handle->object;
|
|
|
|
/* Set configure control table entry */
|
|
ADCBufCC26XX_loadDMAControlTableEntry(handle, conversion, true);
|
|
|
|
/* If we are operating in continous mode, load the alternate DMA control table data structure */
|
|
if (object->recurrenceMode == ADCBuf_RECURRENCE_MODE_CONTINUOUS) {
|
|
ADCBufCC26XX_loadDMAControlTableEntry(handle, conversion, false);
|
|
}
|
|
|
|
/* Enable the channels */
|
|
UDMACC26XX_channelEnable(object->udmaHandle, 1 << UDMA_CHAN_AUX_ADC);
|
|
|
|
/* Configure DMA settings in AUX_EVCTL */
|
|
HWREG(AUX_EVCTL_BASE + AUX_EVCTL_O_DMACTL) = AUX_EVCTL_DMACTL_REQ_MODE_SINGLE | AUX_EVCTL_DMACTL_EN | AUX_EVCTL_DMACTL_SEL_FIFO_NOT_EMPTY;
|
|
|
|
DebugP_log0("ADCBuf: DMA transfer enabled");
|
|
}
|
|
|
|
/*!
|
|
* @brief Function to configure the adc DMA control table entry for basic or ping pong mode
|
|
*
|
|
* @pre ADCBufCC26XX_open() has to be called first.
|
|
*
|
|
* @pre There must not currently be a conversion in progress
|
|
*
|
|
* @param handle An ADCBufCC26XX handle returned from ADCBufCC26XX_open()
|
|
*
|
|
* @param conversion A pointer to an ADCBuf_Conversion
|
|
*
|
|
* @param primaryEntry Is this supposed to modify the primary or the alternate control table entry
|
|
*
|
|
*/
|
|
static void ADCBufCC26XX_loadDMAControlTableEntry(ADCBuf_Handle handle, ADCBuf_Conversion *conversion, bool primaryEntry) {
|
|
ADCBufCC26XX_Object *object;
|
|
volatile tDMAControlTable *dmaControlTableEntry;
|
|
uint32_t numberOfBytes;
|
|
|
|
/* Get the pointer to the object*/
|
|
object = handle->object;
|
|
|
|
/* Calculate the number of bytes for the transfer */
|
|
numberOfBytes = (uint16_t)(conversion->samplesRequestedCount) * ADCBufCC26XX_BYTES_PER_SAMPLE;
|
|
|
|
/* Set configure control table entry */
|
|
dmaControlTableEntry = primaryEntry ? &dmaADCPriControlTableEntry : &dmaADCAltControlTableEntry;
|
|
dmaControlTableEntry->ui32Control = ((object->recurrenceMode == ADCBuf_RECURRENCE_MODE_ONE_SHOT) ? UDMA_MODE_BASIC : UDMA_MODE_PINGPONG) |
|
|
UDMA_SIZE_16 |
|
|
UDMA_SRC_INC_NONE |
|
|
UDMA_DST_INC_16 |
|
|
UDMA_ARB_1 |
|
|
UDMACC26XX_SET_TRANSFER_SIZE((uint16_t)conversion->samplesRequestedCount);
|
|
dmaControlTableEntry->pvDstEndAddr = (void *)((uint32_t)(primaryEntry ? conversion->sampleBuffer : conversion->sampleBufferTwo) + numberOfBytes - 1);
|
|
dmaControlTableEntry->pvSrcEndAddr = (void *)(AUX_ANAIF_BASE + AUX_ANAIF_O_ADCFIFO);
|
|
}
|
|
|
|
/*!
|
|
* @brief Function to configure the DMA to automatically clear the GPT_IRQ line that the ADC triggers off of without using an interrupt handler
|
|
*
|
|
* @pre ADCBufCC26XX_open() has to be called first.
|
|
*
|
|
* @pre There must not currently be a conversion in progress
|
|
*
|
|
* @param handle An ADCBufCC26XX handle returned from ADCBufCC26XX_open()
|
|
*
|
|
* @param conversion A pointer to an ADCBuf_Conversion
|
|
*
|
|
*/
|
|
static void ADCBufCC26XX_configGPTDMA(ADCBuf_Handle handle, ADCBuf_Conversion *conversion) {
|
|
ADCBufCC26XX_Object *object;
|
|
|
|
/* Get the pointer to the object */
|
|
object = handle->object;
|
|
|
|
/* Set configure control table entry */
|
|
ADCBufCC26XX_loadGPTDMAControlTableEntry(handle, conversion, true);
|
|
|
|
/* If we are operating in continous mode, load the alternate DMA control table data structure */
|
|
if (object->recurrenceMode == ADCBuf_RECURRENCE_MODE_CONTINUOUS) {
|
|
ADCBufCC26XX_loadGPTDMAControlTableEntry(handle, conversion, false);
|
|
}
|
|
|
|
/* Enable the channels */
|
|
UDMACC26XX_channelEnable(object->udmaHandle, 1 << UDMA_CHAN_TIMER0_A);
|
|
|
|
/* Enable event signal */
|
|
HWREG(object->timerHandle->hwAttrs->baseAddr + GPT_O_DMAEV) = GPT_DMAEV_TATODMAEN;
|
|
|
|
}
|
|
|
|
/*!
|
|
* @brief Function to configure the GPT DMA control table entry for basic or ping pong mode
|
|
*
|
|
* @pre ADCBufCC26XX_open() has to be called first.
|
|
*
|
|
* @pre There must not currently be a conversion in progress
|
|
*
|
|
* @param handle An ADCBufCC26XX handle returned from ADCBufCC26XX_open()
|
|
*
|
|
* @param conversion A pointer to an ADCBuf_Conversion
|
|
*
|
|
* @param primaryEntry Is this supposed to modify the primary or the alternate control table entry
|
|
*
|
|
*/
|
|
static void ADCBufCC26XX_loadGPTDMAControlTableEntry(ADCBuf_Handle handle, ADCBuf_Conversion *conversion, bool primaryEntry) {
|
|
ADCBufCC26XX_Object *object;
|
|
volatile tDMAControlTable *dmaControlTableEntry;
|
|
|
|
/* Get the pointer to the object */
|
|
object = handle->object;
|
|
|
|
/* Set configure control table entry */
|
|
dmaControlTableEntry = primaryEntry ? &dmaGPT0APriControlTableEntry : &dmaGPT0AAltControlTableEntry;
|
|
dmaControlTableEntry->ui32Control = ((object->recurrenceMode == ADCBuf_RECURRENCE_MODE_ONE_SHOT) ? UDMA_MODE_BASIC : UDMA_MODE_PINGPONG) |
|
|
UDMA_SIZE_8 |
|
|
UDMA_SRC_INC_NONE |
|
|
UDMA_DST_INC_NONE |
|
|
UDMA_ARB_1 |
|
|
UDMACC26XX_SET_TRANSFER_SIZE((uint16_t)conversion->samplesRequestedCount);
|
|
dmaControlTableEntry->pvDstEndAddr = (void *)((uint32_t)(object->timerHandle->hwAttrs->baseAddr + GPT_O_ICLR));
|
|
dmaControlTableEntry->pvSrcEndAddr = (void *)(&gptClear);
|
|
}
|
|
|
|
/*!
|
|
* @brief Function to undo all configurations done by the ADC driver
|
|
*
|
|
* @pre ADCBuf_open() has to be called first.
|
|
*
|
|
* @pre ADCBuf_convert() has to be called first.
|
|
*
|
|
* @param handle An ADCBufCC26XX handle returned from ADCBufCC26XX_open()
|
|
*
|
|
*/
|
|
static void ADCBufCC26XX_cleanADC(ADCBuf_Handle handle) {
|
|
ADCBufCC26XX_Object *object;
|
|
|
|
/* Get the pointer to the object */
|
|
object = handle->object;
|
|
|
|
/* Stop the timer to stop generating triggers */
|
|
GPTimerCC26XX_stop(object->timerHandle);
|
|
|
|
/* Set constraints to guarantee operation */
|
|
Power_releaseConstraint(PowerCC26XX_DISALLOW_STANDBY);
|
|
|
|
if (object->adcSemaphoreInPossession && !object->keepADCSemaphore) {
|
|
/* Release the ADC semaphore */
|
|
AUXSMPHRelease(AUX_SMPH_2);
|
|
object->adcSemaphoreInPossession = false;
|
|
}
|
|
|
|
/* Disable the UDMA channels */
|
|
UDMACC26XX_channelDisable(object->udmaHandle, (1 << UDMA_CHAN_AUX_ADC) | (1 << UDMA_CHAN_TIMER0_A));
|
|
|
|
/* Deallocate pins */
|
|
PIN_close(object->pinHandle);
|
|
|
|
/* Disable UDMA mode for ADC */
|
|
HWREG(AUX_EVCTL_BASE + AUX_EVCTL_O_DMACTL) = AUX_EVCTL_DMACTL_REQ_MODE_SINGLE | AUX_EVCTL_DMACTL_SEL_FIFO_NOT_EMPTY ;
|
|
|
|
/* Clear any remaining GPT_IRQ flags */
|
|
HWREG(object->timerHandle->hwAttrs->baseAddr + GPT_O_ICLR) = GPT_ICLR_DMAAINT + GPT_ICLR_TATOCINT;
|
|
|
|
/* Note that the driver is no longer converting */
|
|
object->conversionInProgress = false;
|
|
}
|
|
|
|
/* Return period in timer counts */
|
|
static uint32_t ADCBufCC26XX_freqToCounts(uint32_t frequency)
|
|
{
|
|
ClockP_FreqHz freq;
|
|
ClockP_getCpuFreq(&freq);
|
|
|
|
uint32_t periodCounts = (freq.lo / frequency) - 1;
|
|
|
|
return periodCounts;
|
|
}
|
|
|
|
/*!
|
|
* @brief Function to acquire the semaphore that arbitrates access to the ADC
|
|
* between the CM3 and the sensor controller
|
|
*
|
|
* @pre ADCBufCC26XX_open() has to be called first.
|
|
*
|
|
* @pre There must not currently be a conversion in progress
|
|
*
|
|
* @param handle An ADCBufCC26XX handle returned from ADCBufCC26XX_open()
|
|
*
|
|
*/
|
|
static bool ADCBufCC26XX_acquireADCSemaphore(ADCBuf_Handle handle) {
|
|
uint32_t key;
|
|
bool semaphoreAvailable;
|
|
ADCBufCC26XX_Object *object;
|
|
|
|
object = handle->object;
|
|
|
|
/* Set semaphoreAvailable false at default */
|
|
semaphoreAvailable = false;
|
|
|
|
/* Disable interrupts */
|
|
key = HwiP_disable();
|
|
|
|
/* Check if ADC is closed or a conversion is in progress */
|
|
if (!(object->isOpen) || object->conversionInProgress) {
|
|
DebugP_log0("ADC: driver must be open and no conversion must be in progress to disable input scaling");
|
|
}
|
|
/* This is a non-blocking call to acquire the ADC semaphore. */
|
|
else if (AUXSMPHTryAcquire(AUX_SMPH_2)) {
|
|
object->adcSemaphoreInPossession = true;
|
|
semaphoreAvailable = true;
|
|
}
|
|
|
|
/* Restore interrupts */
|
|
HwiP_restore(key);
|
|
|
|
return semaphoreAvailable;
|
|
}
|
|
|
|
/*!
|
|
* @brief This function releases the ADC semaphore
|
|
*
|
|
* @pre ADCBufCC26XX_open() has to be called first.
|
|
*
|
|
* @pre There must not currently be a conversion in progress
|
|
*
|
|
* @param handle An ADCBufCC26XX handle returned from ADCBufCC26XX_open()
|
|
*
|
|
*/
|
|
static bool ADCBufCC26XX_releaseADCSemaphore(ADCBuf_Handle handle) {
|
|
uint32_t key;
|
|
bool semaphoreReleased;
|
|
ADCBufCC26XX_Object *object;
|
|
|
|
object= handle->object;
|
|
|
|
/* Set semaphoreReleased true at default */
|
|
semaphoreReleased = true;
|
|
|
|
/* Disable interrupts */
|
|
key = HwiP_disable();
|
|
|
|
/* Check if ADC is closed or a conversion is in progress */
|
|
if (!(object->isOpen) || object->conversionInProgress) {
|
|
DebugP_log0("ADC: driver must be open and no conversion must be in progress to disable input scaling");
|
|
semaphoreReleased = false;
|
|
}
|
|
else {
|
|
/* Release the ADC semaphore */
|
|
AUXSMPHRelease(AUX_SMPH_2);
|
|
object->adcSemaphoreInPossession = false;
|
|
}
|
|
|
|
/* Restore interrupts */
|
|
HwiP_restore(key);
|
|
|
|
return semaphoreReleased;
|
|
}
|
|
|
|
/*
|
|
* ======== ADCBufCC26XX_control ========
|
|
*/
|
|
int_fast16_t ADCBufCC26XX_control(ADCBuf_Handle handle, uint_fast16_t cmd, void * arg) {
|
|
ADCBufCC26XX_Object *object = handle->object;
|
|
int status = ADCBuf_STATUS_ERROR;
|
|
|
|
DebugP_assert(handle);
|
|
|
|
switch (cmd) {
|
|
case ADCBufCC26XX_CMD_ACQUIRE_ADC_SEMAPHORE:
|
|
if (ADCBufCC26XX_acquireADCSemaphore(handle)) {
|
|
status = ADCBuf_STATUS_SUCCESS;
|
|
}
|
|
break;
|
|
case ADCBufCC26XX_CMD_KEEP_ADC_SEMAPHORE:
|
|
object->keepADCSemaphore = true;
|
|
status = ADCBuf_STATUS_SUCCESS;
|
|
break;
|
|
case ADCBufCC26XX_CMD_KEEP_ADC_SEMAPHORE_DISABLE:
|
|
object->keepADCSemaphore = false;
|
|
status = ADCBuf_STATUS_SUCCESS;
|
|
break;
|
|
case ADCBufCC26XX_CMD_RELEASE_ADC_SEMAPHORE:
|
|
if (ADCBufCC26XX_releaseADCSemaphore(handle)) {
|
|
status = ADCBuf_STATUS_SUCCESS;
|
|
}
|
|
break;
|
|
default:
|
|
status = ADCBuf_STATUS_UNDEFINEDCMD;
|
|
break;
|
|
}
|
|
return status;
|
|
}
|