async tpuart_data_link_layer version (#21)

* async data_link_layer version

* Update tpuart_data_link_layer.cpp

use platform specific millis function

* Update tpuart_data_link_layer.h

change timeouts into millis
This commit is contained in:
Bernator 2019-07-15 20:05:01 +02:00 committed by thelsing
parent 8017c8b9c3
commit 1b626808ca
5 changed files with 365 additions and 326 deletions

View File

@ -14,16 +14,31 @@ DataLinkLayer::DataLinkLayer(DeviceObject& devObj, AddressTableObject& addrTab,
void DataLinkLayer::dataRequest(AckType ack, AddressType addrType, uint16_t destinationAddr, FrameFormat format, Priority priority, NPDU& npdu)
{
bool success = sendTelegram(npdu, ack, destinationAddr, addrType, format, priority);
_networkLayer.dataConfirm(ack, addrType, destinationAddr, format, priority, npdu.frame().sourceAddress(), npdu, success);
sendTelegram(npdu, ack, destinationAddr, addrType, format, priority);
}
void DataLinkLayer::systemBroadcastRequest(AckType ack, FrameFormat format, Priority priority, NPDU& npdu)
{
bool success = sendTelegram(npdu, ack, 0, GroupAddress, format, priority);
_networkLayer.systemBroadcastConfirm(ack, format, priority, npdu.frame().sourceAddress(), npdu, success);
sendTelegram(npdu, ack, 0, GroupAddress, format, priority);
}
void DataLinkLayer::dataConReceived(CemiFrame& frame,bool success)
{
AckType ack = frame.ack();
AddressType addrType = frame.addressType();
uint16_t destination = frame.destinationAddress();
uint16_t source = frame.sourceAddress();
FrameFormat type = frame.frameType();
Priority priority = frame.priority();
NPDU& npdu = frame.npdu();
if (addrType == GroupAddress && destination == 0)
_networkLayer.systemBroadcastConfirm(ack, type, priority, source, npdu, success);
else
_networkLayer.dataConfirm(ack, addrType, destination, type, priority, source, npdu, success);
}
void DataLinkLayer::frameRecieved(CemiFrame& frame)
{
AckType ack = frame.ack();
@ -93,3 +108,5 @@ uint8_t* DataLinkLayer::frameData(CemiFrame& frame)
{
return frame._data;
}

View File

@ -21,6 +21,7 @@ public:
virtual bool enabled() const = 0;
protected:
void frameRecieved(CemiFrame& frame);
void dataConReceived(CemiFrame& frame, bool success);
bool sendTelegram(NPDU &npdu, AckType ack, uint16_t destinationAddr, AddressType addrType, FrameFormat format, Priority priority);
virtual bool sendFrame(CemiFrame& frame) = 0;
uint8_t* frameData(CemiFrame& frame);

View File

@ -36,6 +36,7 @@ bool IpDataLinkLayer::sendFrame(CemiFrame& frame)
bool success = sendBytes(buffer, length);
// only send 50 packet per second: see KNX 3.2.6 p.6
_platform.mdelay(20);
dataConReceived(frame, success);
delete[] buffer;
return success;
}

View File

@ -73,6 +73,252 @@
#define U_STOP_MODE_IND 0x2B
#define U_SYSTEM_STAT_IND 0x4B
//loop states
#define IDLE 0
#define RX_FIRST_BYTE 1
#define RX_L_DATA 2
#define RX_WAIT_DATA_CON 3
#define TX_FRAME 4
void TpUartDataLinkLayer::loop(){
_receiveBuffer[0] = 0x29;
_receiveBuffer[1] = 0;
uint8_t* buffer = _receiveBuffer + 2;
uint8_t rxByte;
if (!_enabled)
return;
switch(_loopState){
case IDLE:
if(_platform.uartAvailable()){
_loopState = RX_FIRST_BYTE;
}
else{
if(!_waitConfirm && !isTxQueueEmpty()){
loadNextTxFrame();
_waitConfirm = true;
_waitConfirmStartTime = _platform.millis();
_loopState = TX_FRAME;
}
}
break;
case TX_FRAME:
if(sendSingleFrameByte() == false){
_loopState = IDLE;
}
break;
case RX_FIRST_BYTE:
rxByte =_platform.readUart();
_lastByteRxTime = _platform.millis();
_RxByteCnt = 0;
_xorSum = 0;
if ((rxByte & L_DATA_MASK) == L_DATA_STANDARD_IND){
buffer[_RxByteCnt++]=rxByte;
_xorSum ^= rxByte;
_RxByteCnt++; //convert to L_DATA_EXTENDED
_convert = true;
_loopState=RX_L_DATA;
break;
}
else if ((rxByte & L_DATA_MASK) == L_DATA_EXTENDED_IND){
buffer[_RxByteCnt++]=rxByte;
_xorSum ^= rxByte;
_convert = false;
_loopState=RX_L_DATA;
break;
}
else if ((rxByte & L_DATA_CON_MASK) == L_DATA_CON){
println("got unexpected L_DATA_CON");
}
else if (rxByte == L_POLL_DATA_IND){
// not sure if this can happen
println("got L_POLL_DATA_IND");
}
else if ((rxByte & L_ACKN_MASK) == L_ACKN_IND){
// this can only happen in bus monitor mode
println("got L_ACKN_IND");
}
else if (rxByte == U_RESET_IND){
println("got U_RESET_IND");
}
else if((rxByte & U_STATE_IND) == U_STATE_IND){
print("got U_STATE_IND: 0x");
print(rxByte, HEX);
println();
}
else if((rxByte & U_FRAME_STATE_MASK) == U_FRAME_STATE_IND){
print("got U_FRAME_STATE_IND: 0x");
print(rxByte, HEX);
println();
}
else if((rxByte & U_CONFIGURE_MASK) == U_CONFIGURE_IND){
print("got U_CONFIGURE_IND: 0x");
print(rxByte, HEX);
println();
}
else if(rxByte == U_FRAME_END_IND){
println("got U_FRAME_END_IND");
}
else if(rxByte == U_STOP_MODE_IND){
println("got U_STOP_MODE_IND");
}
else if(rxByte == U_SYSTEM_STAT_IND){
print("got U_SYSTEM_STAT_IND: 0x");
while (true){
int tmp = _platform.readUart();
if (tmp < 0)
continue;
print(tmp, HEX);
break;
}
println();
}
else{
print("got UNEXPECTED: 0x");
print(rxByte, HEX);
println();
}
_loopState = IDLE;
break;
case RX_L_DATA:
if (_platform.millis() - _lastByteRxTime > BYTE_TIMEOUT){
_RxByteCnt = 0;
_loopState = IDLE;
println("Timeout during RX_L_DATA");
break;
}
if(!_platform.uartAvailable()) break;
_lastByteRxTime = _platform.millis();
rxByte =_platform.readUart();
if(_RxByteCnt == MAX_KNX_TELEGRAM_SIZE){
_loopState = IDLE;
println("invalid telegram size");
}
else{
buffer[_RxByteCnt++]=rxByte;
}
if(_RxByteCnt==7){ //Destination Address + payload available
_xorSum ^= rxByte;
//check if echo
if (!((buffer[0]^_sendBuffer[0])&~0x20) && !memcmp(buffer+2,_sendBuffer+1,5)){ //ignore repeated bit of control byte
_isEcho = true;
}
else{
_isEcho = false;
}
//convert into Extended.ind
if(_convert){
uint8_t payloadLength = buffer[6] & 0x0F;
buffer[1] = buffer[6] & 0xF0;
buffer[6] = payloadLength;
}
if(!_isEcho){
uint8_t c = 0x10;
//ceck if individual or group address
if ((buffer[6] & 0x80) == 0){ //individual
if(_deviceObject.induvidualAddress() == getWord(buffer + 4)){
c |= 0x01;
}
}
else{ //group
if(_groupAddressTable.contains(getWord(buffer + 4)) || getWord(buffer + 4) == 0){
c |= 0x01;
}
}
_platform.writeUart(c);
}
}
else if(_RxByteCnt == buffer[6]+7+2){ //complete Frame received, payloadLength+1 for TCPI +1 for CRC
if(rxByte == (uint8_t)(~_xorSum)){ //check if crc is correct
if(_isEcho && _sendBuffer != NULL){ //check if it is realy an echo, rx_crc = tx_crc
if(rxByte == _sendBuffer[_sendBufferLength-1])
_isEcho = true;
else
_isEcho = false;
}
if(_isEcho){
_loopState = RX_WAIT_DATA_CON;
}
else{
frameBytesReceived(_receiveBuffer, _RxByteCnt+2);
_loopState=IDLE;
}
}
else{
println("frame with invalid crc ignored");
_loopState=IDLE;
}
}
else{
_xorSum ^= rxByte;
}
break;
case RX_WAIT_DATA_CON:
if(!_platform.uartAvailable()) break;
rxByte =_platform.readUart();
_lastByteRxTime = _platform.millis();
if ((rxByte & L_DATA_CON_MASK) == L_DATA_CON){
//println("L_DATA_CON received");
dataConBytesReceived(_receiveBuffer, _RxByteCnt+2, ((rxByte & SUCCESS) > 0));
_waitConfirm = false;
delete[] _sendBuffer;
_sendBuffer = 0;
_sendBufferLength = 0;
_loopState=IDLE;
}
else{
//should not happen
println("expected L_DATA_CON not received");
dataConBytesReceived(_receiveBuffer, _RxByteCnt+2, false);
_waitConfirm = false;
delete[] _sendBuffer;
_sendBuffer = 0;
_sendBufferLength = 0;
_loopState=IDLE;
}
break;
default:
break;
}
if(_waitConfirm){
if (_platform.millis() - _waitConfirmStartTime > CONFIRM_TIMEOUT){
println("L_DATA_CON not received within expected time");
uint8_t cemiBuffer[MAX_KNX_TELEGRAM_SIZE];
cemiBuffer[0] = 0x29;
cemiBuffer[1] = 0;
memcpy((cemiBuffer+2),_sendBuffer,_sendBufferLength);
dataConBytesReceived(cemiBuffer, _sendBufferLength+2, false);
_waitConfirm = false;
delete[] _sendBuffer;
_sendBuffer = 0;
_sendBufferLength = 0;
if(_loopState == RX_WAIT_DATA_CON)
_loopState=IDLE;
}
}
}
bool TpUartDataLinkLayer::sendFrame(CemiFrame& frame)
{
if (!_enabled)
return false;
addFrameTxQueue(frame);
return true;
}
void TpUartDataLinkLayer::resetChip()
{
uint8_t cmd = U_RESET_REQ;
@ -106,160 +352,6 @@ TpUartDataLinkLayer::TpUartDataLinkLayer(DeviceObject& devObj, AddressTableObjec
}
bool TpUartDataLinkLayer::sendFrame(CemiFrame& frame)
{
if (!_enabled)
return false;
uint16_t length = frame.telegramLengthtTP();
uint8_t* buffer = new uint8_t[length];
frame.fillTelegramTP(buffer);
_sendBuffer = buffer;
_sendResult = false;
_sendBufferLength = length;
sendBytes(buffer, length);
while (_sendBuffer != 0)
loop();
delete[] buffer;
return _sendResult;
}
void TpUartDataLinkLayer::loop()
{
if (!_enabled)
return;
if (_platform.uartAvailable() == 0)
return;
uint8_t firstByte = _platform.readUart();
if (checkDataInd(firstByte))
return;
if (checkDataCon(firstByte))
return;
if (checkPollDataInd(firstByte))
return;
if (checkAckNackInd(firstByte))
return;
if (checkResetInd(firstByte))
return;
if (checkStateInd(firstByte))
return;
if (checkFrameStateInd(firstByte))
return;
if (checkConfigureInd(firstByte))
return;
if (checkFrameEndInd(firstByte))
return;
if (checkStopModeInd(firstByte))
return;
if (checkSystemStatInd(firstByte))
return;
handleUnexpected(firstByte);
}
bool TpUartDataLinkLayer::checkDataInd(uint8_t firstByte)
{
const size_t bufferSize = 512;
uint8_t tmp = firstByte & L_DATA_MASK;
if (tmp != L_DATA_STANDARD_IND && tmp != L_DATA_EXTENDED_IND)
return false;
int len = 0;
uint8_t cemiBuffer[bufferSize + 2];
cemiBuffer[0] = 0x29;
cemiBuffer[1] = 0;
uint8_t* buffer = cemiBuffer + 2;
buffer[0] = firstByte;
uint8_t payloadLength = 0;
if (tmp == L_DATA_STANDARD_IND)
{
//convert to extended frame format
_platform.readBytesUart(buffer + 2, 5);
sendAck((AddressType)(buffer[6] & GroupAddress), getWord(buffer + 4));
payloadLength = buffer[6] & 0xF;
_platform.readBytesUart(buffer + 7, payloadLength + 2); //+1 for TCPI +1 for CRC
buffer[1] = buffer[6] & 0xF0;
buffer[6] = payloadLength;
}
else
{
//extended frame
_platform.readBytesUart(buffer + 1, 6);
sendAck((AddressType)(buffer[1] & GroupAddress), getWord(buffer + 4));
payloadLength = buffer[6];
_platform.readBytesUart(buffer + 7, payloadLength + 2); //+1 for TCPI +1 for CRC
}
len = payloadLength + 9;
const uint8_t queueLength = 5;
static uint8_t buffers[queueLength][bufferSize + 2];
static uint16_t bufferLengths[queueLength];
if (_sendBuffer != 0)
{
// we are trying to send a telegram queue received telegrams until we get our sent telegram
if (len == _sendBufferLength && memcmp(_sendBuffer, buffer, len) == 0)
{
//we got the send telegramm back next byte is L_Data.con byte
uint8_t confirm = _platform.readUart();
confirm &= L_DATA_CON_MASK;
_sendResult = (confirm > 0);
_sendBuffer = 0;
_sendBufferLength = 0;
return true;
}
// queue telegram, if we get more the queueLength before send succeeds
// ignore the telegram
for (int i = 0; i < queueLength; i++)
{
if (bufferLengths[i] != 0)
continue;
bufferLengths[i] = len;
memcpy(&buffers[i][0], cemiBuffer, len + 2);
break;
}
}
else
{
// process all previously queued telegramms first
for (int i = 0; i < queueLength; i++)
{
if (bufferLengths[i] == 0)
break;
frameBytesReceived(&buffers[i][0], bufferLengths[i]+2);
bufferLengths[i] = 0;
}
frameBytesReceived(cemiBuffer, len+2);
}
return true;
}
void TpUartDataLinkLayer::frameBytesReceived(uint8_t* buffer, uint16_t length)
{
//printHex("=>", buffer, length);
@ -268,133 +360,12 @@ void TpUartDataLinkLayer::frameBytesReceived(uint8_t* buffer, uint16_t length)
frameRecieved(frame);
}
bool TpUartDataLinkLayer::checkDataCon(uint8_t firstByte)
void TpUartDataLinkLayer::dataConBytesReceived(uint8_t* buffer, uint16_t length, bool success)
{
uint8_t tmp = firstByte & L_DATA_CON_MASK;
if (tmp != L_DATA_CON)
return false;
//printHex("=>", buffer, length);
CemiFrame frame(buffer, length);
dataConReceived(frame,success);
if (_sendBuffer == 0)
{
println("got unexpected L_DATA_CON");
return true;
}
_sendResult = (firstByte & SUCCESS) > 0;
_sendBuffer = 0;
_sendBufferLength = 0;
return true;
}
bool TpUartDataLinkLayer::checkPollDataInd(uint8_t firstByte)
{
if (firstByte != L_POLL_DATA_IND)
return false;
// not sure if this can happen
println("got L_POLL_DATA_IND");
return true;
}
bool TpUartDataLinkLayer::checkAckNackInd(uint8_t firstByte)
{
uint8_t tmp = firstByte & L_ACKN_MASK;
if (tmp != L_ACKN_IND)
return false;
// this can only happen in bus monitor mode
println("got L_ACKN_IND");
return true;
}
bool TpUartDataLinkLayer::checkResetInd(uint8_t firstByte)
{
if (firstByte != U_RESET_IND)
return false;
println("got U_RESET_IND");
return true;
}
bool TpUartDataLinkLayer::checkStateInd(uint8_t firstByte)
{
uint8_t tmp = firstByte & U_STATE_IND;
if (tmp != U_STATE_IND)
return false;
print("got U_STATE_IND: 0x");
print(firstByte, HEX);
println();
return true;
}
bool TpUartDataLinkLayer::checkFrameStateInd(uint8_t firstByte)
{
uint8_t tmp = firstByte & U_FRAME_STATE_MASK;
if (tmp != U_FRAME_STATE_IND)
return false;
print("got U_FRAME_STATE_IND: 0x");
print(firstByte, HEX);
println();
return true;
}
bool TpUartDataLinkLayer::checkConfigureInd(uint8_t firstByte)
{
uint8_t tmp = firstByte & U_CONFIGURE_MASK;
if (tmp != U_CONFIGURE_IND)
return false;
print("got U_CONFIGURE_IND: 0x");
print(firstByte, HEX);
println();
return true;
}
bool TpUartDataLinkLayer::checkFrameEndInd(uint8_t firstByte)
{
if (firstByte != U_FRAME_END_IND)
return false;
println("got U_FRAME_END_IND");
return true;
}
bool TpUartDataLinkLayer::checkStopModeInd(uint8_t firstByte)
{
if (firstByte != U_STOP_MODE_IND)
return false;
println("got U_STOP_MODE_IND");
return true;
}
bool TpUartDataLinkLayer::checkSystemStatInd(uint8_t firstByte)
{
if (firstByte != U_SYSTEM_STAT_IND)
return false;
print("got U_SYSTEM_STAT_IND: 0x");
while (true)
{
int tmp = _platform.readUart();
if (tmp < 0)
continue;
print(tmp, HEX);
break;
}
println();
return true;
}
void TpUartDataLinkLayer::handleUnexpected(uint8_t firstByte)
{
print("got UNEXPECTED: 0x");
print(firstByte, HEX);
println();
}
void TpUartDataLinkLayer::enabled(bool value)
@ -424,45 +395,74 @@ bool TpUartDataLinkLayer::enabled() const
}
void TpUartDataLinkLayer::sendBytes(uint8_t* bytes, uint16_t length)
{
//printHex("<=", bytes, length);
bool TpUartDataLinkLayer::sendSingleFrameByte(){
uint8_t cmd[2];
uint8_t idx = _TxByteCnt / 64;
uint8_t oldIdx = 0;
if(_sendBuffer == NULL) return false;
for (int i = 0; i < length; i++)
{
uint8_t idx = length / 64;
if (idx != oldIdx)
if(_TxByteCnt < _sendBufferLength){
if (idx != _oldIdx)
{
oldIdx = idx;
_oldIdx = idx;
cmd[0] = U_L_DATA_OFFSET_REQ | idx;
_platform.writeUart(cmd, 1);
}
if (i != length - 1)
cmd[0] = U_L_DATA_START_CONT_REQ | i;
if (_TxByteCnt != _sendBufferLength - 1)
cmd[0] = U_L_DATA_START_CONT_REQ | _TxByteCnt;
else
cmd[0] = U_L_DATA_END_REQ | i;
cmd[0] = U_L_DATA_END_REQ | _TxByteCnt;
cmd[1] = bytes[i];
cmd[1] = _sendBuffer[_TxByteCnt];
_platform.writeUart(cmd, 2);
_TxByteCnt++;
return true;
}
else{
_TxByteCnt=0;
return false;
}
}
void TpUartDataLinkLayer::sendAck(AddressType type, uint16_t address)
{
if ( (type == InduvidualAddress && _deviceObject.induvidualAddress() == address)
|| (type == GroupAddress && (_groupAddressTable.contains(address) || address == 0)))
{
//send ack.
_platform.writeUart(U_ACK_REQ + 1);
void TpUartDataLinkLayer::addFrameTxQueue(CemiFrame& frame){
_tx_queue_frame_t* tx_frame = new _tx_queue_frame_t;
tx_frame->length = frame.telegramLengthtTP();
tx_frame->data = new uint8_t[tx_frame->length];
tx_frame->next = NULL;
frame.fillTelegramTP(tx_frame->data);
if (_tx_queue.back == NULL) {
_tx_queue.front = _tx_queue.back = tx_frame;
}
else
{
// send not addressed
_platform.writeUart(U_ACK_REQ);
else{
_tx_queue.back->next = tx_frame;
_tx_queue.back = tx_frame;
}
}
bool TpUartDataLinkLayer::isTxQueueEmpty(){
if (_tx_queue.front == NULL){
return true;
}
return false;
}
void TpUartDataLinkLayer::loadNextTxFrame(){
if (_tx_queue.front == NULL) {
return;
}
_tx_queue_frame_t* tx_frame = _tx_queue.front;
_sendBuffer = tx_frame->data;
_sendBufferLength = tx_frame->length;
_tx_queue.front = tx_frame->next;
if (_tx_queue.front == NULL){
_tx_queue.back = NULL;
}
delete tx_frame;
}

View File

@ -3,6 +3,11 @@
#include <stdint.h>
#include "data_link_layer.h"
#define MAX_KNX_TELEGRAM_SIZE 263
#define BYTE_TIMEOUT 3 //milli seconds
#define CONFIRM_TIMEOUT 500 //milli seconds
class TpUartDataLinkLayer: public DataLinkLayer
{
using DataLinkLayer::_deviceObject;
@ -17,25 +22,40 @@ public:
bool enabled() const;
private:
bool _enabled = false;
bool _waitConfirm = false;
uint8_t* _sendBuffer = 0;
bool _sendResult = false;
uint16_t _sendBufferLength = 0;
uint8_t _receiveBuffer[MAX_KNX_TELEGRAM_SIZE];
uint8_t _loopState = 0;
uint16_t _RxByteCnt = 0;
uint16_t _TxByteCnt = 0;
uint8_t _oldIdx = 0;
bool _isEcho = false;
bool _isAddressed = false;
bool _convert = false;
uint8_t _xorSum=0;
uint32_t _lastByteRxTime;
uint32_t _waitConfirmStartTime;
struct _tx_queue_frame_t{
uint8_t *data;
uint16_t length;
_tx_queue_frame_t *next;
};
struct _tx_queue_t {
_tx_queue_frame_t *front=NULL;
_tx_queue_frame_t *back=NULL;
}_tx_queue;
void addFrameTxQueue(CemiFrame& frame);
bool isTxQueueEmpty();
void loadNextTxFrame();
bool sendSingleFrameByte();
bool sendFrame(CemiFrame& frame);
bool checkDataInd(uint8_t firstByte);
bool checkDataCon(uint8_t firstByte);
bool checkPollDataInd(uint8_t firstByte);
bool checkAckNackInd(uint8_t firstByte);
bool checkResetInd(uint8_t firstByte);
bool checkStateInd(uint8_t firstByte);
bool checkFrameStateInd(uint8_t firstByte);
bool checkConfigureInd(uint8_t firstByte);
bool checkFrameEndInd(uint8_t firstByte);
bool checkStopModeInd(uint8_t firstByte);
bool checkSystemStatInd(uint8_t firstByte);
void handleUnexpected(uint8_t firstByte);
void sendBytes(uint8_t* buffer, uint16_t length);
void frameBytesReceived(uint8_t* buffer, uint16_t length);
void dataConBytesReceived(uint8_t* buffer, uint16_t length, bool success);
void resetChip();
void stopChip();
void sendAck(AddressType type, uint16_t address);
};