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296 lines
10 KiB
C
296 lines
10 KiB
C
/******************************************************************************
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* Filename: rfc.c
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* Revised: 2018-08-08 11:04:37 +0200 (Wed, 08 Aug 2018)
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* Revision: 52334
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*
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* Description: Driver for the RF Core.
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*
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* Copyright (c) 2015 - 2017, 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 are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of the ORGANIZATION nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* 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, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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#include "rfc.h"
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#include "rf_mailbox.h"
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#include <string.h>
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//*****************************************************************************
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//
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// Handle support for DriverLib in ROM:
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// This section will undo prototype renaming made in the header file
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//
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//*****************************************************************************
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#if !defined(DOXYGEN)
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#undef RFCCpeIntGetAndClear
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#define RFCCpeIntGetAndClear NOROM_RFCCpeIntGetAndClear
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#undef RFCDoorbellSendTo
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#define RFCDoorbellSendTo NOROM_RFCDoorbellSendTo
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#undef RFCSynthPowerDown
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#define RFCSynthPowerDown NOROM_RFCSynthPowerDown
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#undef RFCCpePatchReset
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#define RFCCpePatchReset NOROM_RFCCpePatchReset
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#undef RFCOverrideSearch
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#define RFCOverrideSearch NOROM_RFCOverrideSearch
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#undef RFCOverrideUpdate
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#define RFCOverrideUpdate NOROM_RFCOverrideUpdate
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#undef RFCHwIntGetAndClear
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#define RFCHwIntGetAndClear NOROM_RFCHwIntGetAndClear
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#undef RFCAnaDivTxOverride
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#define RFCAnaDivTxOverride NOROM_RFCAnaDivTxOverride
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#endif
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//*****************************************************************************
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//
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// Get and clear CPE interrupt flags which match the provided bitmask
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//
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//*****************************************************************************
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uint32_t
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RFCCpeIntGetAndClear(uint32_t ui32Mask)
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{
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// Read the CPE interrupt flags which match the provided bitmask
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uint32_t ui32Ifg = HWREG(RFC_DBELL_BASE + RFC_DBELL_O_RFCPEIFG) & ui32Mask;
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// Clear the interrupt flags
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RFCCpeIntClear(ui32Ifg);
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// Return with the interrupt flags
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return (ui32Ifg);
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}
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//*****************************************************************************
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//
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// Send a radio operation to the doorbell and wait for an acknowledgement
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//
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//*****************************************************************************
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uint32_t
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RFCDoorbellSendTo(uint32_t pOp)
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{
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// Wait until the doorbell becomes available
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while(HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDR) != 0);
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RFCAckIntClear();
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// Submit the command to the CM0 through the doorbell
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HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDR) = pOp;
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// Wait until the CM0 starts to parse the command
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while(!HWREG(RFC_DBELL_BASE + RFC_DBELL_O_RFACKIFG));
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RFCAckIntClear();
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// Return with the content of status register
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return(HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDSTA));
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}
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//*****************************************************************************
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//
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// Turn off the RF synthesizer. The radio will no longer respond to commands!
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//
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//*****************************************************************************
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void
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RFCSynthPowerDown(void)
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{
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// Definition of reserved words
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const uint32_t RFC_RESERVED0 = 0x40046054;
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const uint32_t RFC_RESERVED1 = 0x40046060;
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const uint32_t RFC_RESERVED2 = 0x40046058;
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const uint32_t RFC_RESERVED3 = 0x40044100;
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// Disable CPE clock, enable FSCA clock.
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HWREG(RFC_PWR_NONBUF_BASE + RFC_PWR_O_PWMCLKEN) = (HWREG(RFC_PWR_NONBUF_BASE + RFC_PWR_O_PWMCLKEN)
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& ~RFC_PWR_PWMCLKEN_CPE_M) | RFC_PWR_PWMCLKEN_FSCA_M | RFC_PWR_PWMCLKEN_RFE_M;
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HWREG(RFC_RESERVED0) = 3;
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HWREG(RFC_RESERVED1) = 0x1030;
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HWREG(RFC_RESERVED2) = 1;
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HWREG(RFC_RESERVED1) = 0x50;
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HWREG(RFC_RESERVED2) = 1;
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HWREG(RFC_RESERVED1) = 0x650;
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HWREG(RFC_RESERVED2) = 1;
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HWREG(RFC_RESERVED1) = 0x10C0;
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HWREG(RFC_RESERVED2) = 1;
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HWREG(RFC_RESERVED3) = 1;
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}
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//*****************************************************************************
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//
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// Reset previously patched CPE RAM to a state where it can be patched again
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//
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//*****************************************************************************
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void
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RFCCpePatchReset(void)
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{
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// Function is not complete
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}
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//*****************************************************************************
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//
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// Function to search an override list for the provided pattern within the search depth.
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//
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//*****************************************************************************
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uint8_t
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RFCOverrideSearch(const uint32_t *pOverride, const uint32_t pattern, const uint32_t mask, const uint8_t searchDepth)
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{
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// Search from start of the override list, to look for first override entry that matches search pattern
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uint8_t override_index;
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for(override_index = 0; (override_index < searchDepth) && (pOverride[override_index] != END_OVERRIDE); override_index++)
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{
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// Compare the value to the given pattern
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if((pOverride[override_index] & mask) == pattern)
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{
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// Return with the index of override in case of match
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return override_index;
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}
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}
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// Return with an invalid index
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return 0xFF;
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}
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//*****************************************************************************
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//
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// Function to calculate the proper override run-time for the High Gain PA.
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//
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//*****************************************************************************
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uint32_t
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RFCAnaDivTxOverride(uint8_t loDivider, uint8_t frontEndMode)
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{
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uint16_t fsOnly;
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uint16_t txSetting;
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switch (loDivider)
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{
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case 0: fsOnly = 0x0502;
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break;
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case 2:
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fsOnly = 0x0102;
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break;
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case 4:
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case 6:
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case 12:
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fsOnly = 0xF101;
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break;
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case 5:
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case 10:
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case 15:
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case 30:
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fsOnly = 0x1101;
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break;
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default:
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// Error, should not occur!
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fsOnly = 0;
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break;
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}
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if (frontEndMode == 255)
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{
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// Special value meaning 20 dBm PA
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txSetting = (fsOnly | 0x00C0) & ~0x0400;
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}
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else if (frontEndMode == 0)
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{
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// Differential
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txSetting = fsOnly | 0x0030;
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}
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else if (frontEndMode & 1)
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{
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// Single ended on RFP
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txSetting = fsOnly | 0x0010;
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}
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else
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{
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// Single ended on RFN
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txSetting = fsOnly | 0x0020;
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}
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return ((((uint32_t) txSetting) << 16) | RFC_FE_OVERRIDE_ADDRESS);
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}
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//*****************************************************************************
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//
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// Update the override list based on values stored in FCFG1
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//
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//*****************************************************************************
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uint8_t
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RFCOverrideUpdate(rfc_radioOp_t *pOpSetup, uint32_t *pParams)
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{
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// Function is left blank for compatibility reasons.
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return 0;
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}
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//*****************************************************************************
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//
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// Get and clear HW interrupt flags
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//
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//*****************************************************************************
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uint32_t
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RFCHwIntGetAndClear(uint32_t ui32Mask)
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{
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// Read the CPE interrupt flags which match the provided bitmask
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uint32_t ui32Ifg = HWREG(RFC_DBELL_BASE + RFC_DBELL_O_RFHWIFG) & ui32Mask;
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// Clear the interupt flags
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RFCHwIntClear(ui32Ifg);
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// Return with the interrupt flags
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return (ui32Ifg);
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}
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//*****************************************************************************
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//
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// Handle support for DriverLib in ROM:
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// This section will undo prototype renaming made in the header file
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//
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//*****************************************************************************
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#if !defined(DOXYGEN)
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#undef RFCCpeIntGetAndClear
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#define RFCCpeIntGetAndClear NOROM_RFCCpeIntGetAndClear
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#undef RFCDoorbellSendTo
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#define RFCDoorbellSendTo NOROM_RFCDoorbellSendTo
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#undef RFCSynthPowerDown
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#define RFCSynthPowerDown NOROM_RFCSynthPowerDown
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#undef RFCCpePatchReset
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#define RFCCpePatchReset NOROM_RFCCpePatchReset
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#undef RFCOverrideSearch
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#define RFCOverrideSearch NOROM_RFCOverrideSearch
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#undef RFCOverrideUpdate
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#define RFCOverrideUpdate NOROM_RFCOverrideUpdate
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#undef RFCHwIntGetAndClear
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#define RFCHwIntGetAndClear NOROM_RFCHwIntGetAndClear
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#undef RFCAnaDivTxOverride
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#define RFCAnaDivTxOverride NOROM_RFCAnaDivTxOverride
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#endif
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// See rfc.h for implementation
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