250 lines
6.9 KiB
C++
250 lines
6.9 KiB
C++
/*
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* ll_hsusart_impl.h
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*
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* Created on: Oct 29, 2019
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* Author: abody
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*/
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#include <string.h>
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#include "ll_hsusart.h"
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namespace f4ll {
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template<typename T> static inline T RoundUpTo4(T input)
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{
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return (input + 3) & (((T)-1) - 3);
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}
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LL_HsUsart::LL_HsUsart(USART_TypeDef *usart, DMA_TypeDef *dma, uint32_t streamRx, uint32_t streamTx)
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: m_usart(usart)
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, m_rxDma(dma, streamRx)
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, m_txDma(dma, streamTx)
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{
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LL_CrcHandler::Instance().AttachSlot(m_crcSlot);
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LL_DMA_EnableIT_TC(dma, streamRx);
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LL_DMA_EnableIT_TE(dma, streamRx);
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LL_DMA_EnableIT_TC(dma, streamTx);
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LL_DMA_EnableIT_TE(dma, streamTx);
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LL_USART_EnableIT_IDLE(usart);
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memset(&m_stats, 0, sizeof(m_stats));
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}
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uint8_t *LL_HsUsart::GetTxPacketBuffer(void)
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{
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return m_txBuffer.packet.payload;
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}
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USART_TypeDef* LL_HsUsart::GetUsart(void)
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{
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return m_usart;
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}
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LL_HsUsart::Stats const & LL_HsUsart::GetStats(void)
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{
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return m_stats;
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}
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bool LL_HsUsart::IsTxBusy()
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{
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return m_txBuffer.busy;
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}
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bool LL_HsUsart::IsTxFailed()
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{
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return m_txBuffer.error;
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}
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bool LL_HsUsart::IsRxBusy(bool second)
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{
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return m_rxBuffers[second].busy;
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}
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bool LL_HsUsart::IsRxFailed(bool second)
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{
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return m_rxBuffers[second].error;
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}
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void LL_HsUsart::RxProcessed(bool second)
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{
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m_rxBuffers[second].busy = false;
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m_rxBuffers[second].error = false;
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}
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void LL_HsUsart::SetCallback(IHsUsartCallback *callback, uintptr_t callbackParam)
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{
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m_userCallback = callback;
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m_userCallbackParam = callbackParam;
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}
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void LL_HsUsart::BuildHeader(Packet &packet, uint8_t serialNo, uint8_t length)
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{
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uint8_t hash = STARTMARKER;
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packet.header.startByte = STARTMARKER;
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packet.header.serial = serialNo;
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hash ^= serialNo;
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packet.header.payloadLength = length;
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hash ^= length;
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packet.header.hash = hash;
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}
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bool LL_HsUsart::CheckHeader(PacketHeader &header)
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{
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return header.startByte == STARTMARKER && (header.startByte ^ header.serial ^ header.payloadLength) == header.hash;
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}
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void LL_HsUsart::PostPacket(uint8_t const *payload, uint8_t length, bool waitForCrcQueue)
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{
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uint16_t payloadLength = RoundUpTo4((uint16_t)length);
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BuildHeader(m_txBuffer.packet, m_txSerialNo++, length);
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if(payload)
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memcpy(m_txBuffer.packet.payload, payload, length);
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m_txBuffer.requestedLength = sizeof(m_txBuffer.packet.header) + payloadLength + sizeof(uint32_t);
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m_txBuffer.busy = true;
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m_txBuffer.error = false;
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LL_CrcHandler::Instance().Enqueue(m_crcSlot, 0, &m_txBuffer.packet, sizeof(PacketHeader) + payloadLength,
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nullptr, reinterpret_cast<uintptr_t>(m_txBuffer.packet.payload + payloadLength));
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while(waitForCrcQueue && LL_CrcHandler::Instance().IsQueued(m_crcSlot, 0));
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LL_DMA_ConfigAddresses(m_txDma.GetDma(), m_txDma.GetStream(), reinterpret_cast<uint32_t>(&m_txBuffer.packet),
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LL_USART_DMA_GetRegAddr(m_usart), LL_DMA_DIRECTION_MEMORY_TO_PERIPH);
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LL_DMA_SetDataLength(m_txDma.GetDma(), m_txDma.GetStream(), m_txBuffer.requestedLength);
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LL_USART_EnableDMAReq_TX(m_usart);
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LL_DMA_EnableStream(m_txDma.GetDma(), m_txDma.GetStream());
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++m_stats.sent;
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}
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void LL_HsUsart::SetupReceive()
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{
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int packetIndex = m_rxBufferSelector;
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LL_DMA_ConfigAddresses(m_rxDma.GetDma(), m_rxDma.GetStream(), LL_USART_DMA_GetRegAddr(m_usart),
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reinterpret_cast<uint32_t>(&m_rxBuffers[packetIndex]), LL_DMA_DIRECTION_PERIPH_TO_MEMORY);
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m_rxBuffers[packetIndex].requestedLength = sizeof(m_rxBuffers[packetIndex].packet);
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LL_DMA_SetDataLength(m_rxDma.GetDma(), m_rxDma.GetStream(), m_rxBuffers[packetIndex].requestedLength); // payload already have extra room for hash
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LL_USART_EnableDMAReq_RX(m_usart);
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LL_USART_ClearFlag_ORE(m_usart);
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LL_DMA_EnableStream(m_rxDma.GetDma(), m_rxDma.GetStream());
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}
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void LL_HsUsart::UsartIrq(void)
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{
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if(LL_USART_IsActiveFlag_IDLE(m_usart) && LL_USART_IsEnabledIT_IDLE(m_usart)) { // receiver idle
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LL_USART_ClearFlag_IDLE(m_usart);
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uint16_t rcvdLen = m_rxBuffers[m_rxBufferSelector].requestedLength - LL_DMA_GetDataLength(m_rxDma.GetDma(), m_rxDma.GetStream());
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if(rcvdLen >= sizeof(PacketHeader)) {
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if(CheckHeader(m_rxBuffers[m_rxBufferSelector].packet.header)) {
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if(rcvdLen >= sizeof(PacketHeader) +
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RoundUpTo4((uint16_t)m_rxBuffers[m_rxBufferSelector].packet.header.payloadLength)
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+ sizeof(uint32_t))
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LL_DMA_DisableStream(m_rxDma.GetDma(), m_rxDma.GetStream());
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else
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++m_stats.premature_payload;
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} else {
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m_rxBuffers[m_rxBufferSelector].error = 1;
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LL_DMA_DisableStream(m_rxDma.GetDma(), m_rxDma.GetStream());
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}
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} else
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++m_stats.premature_hdr;
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}
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else if(LL_USART_IsActiveFlag_TC(m_usart) && LL_USART_IsEnabledIT_TC(m_usart)) { // transmission complete
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LL_USART_DisableIT_TC(m_usart);
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LL_USART_DisableDirectionTx(m_usart); // enforcing an idle frame
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LL_USART_EnableDirectionTx(m_usart);
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m_txBuffer.busy = 0;
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}
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}
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void LL_HsUsart::RxDmaIrq()
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{
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++m_stats.rcvd;
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if(*m_rxDma.GetIsReg() & m_rxDma.GetTcMask()) {
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*m_rxDma.GetIcfReg() = m_rxDma.GetTcMask();
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if(CheckHeader(m_rxBuffers[m_rxBufferSelector].packet.header))
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LL_CrcHandler::Instance().Enqueue(m_crcSlot, 1,
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&m_rxBuffers[m_rxBufferSelector].packet,
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sizeof(PacketHeader) + RoundUpTo4((uint16_t)m_rxBuffers[m_rxBufferSelector].packet.header.payloadLength),
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this, m_rxBufferSelector);
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else {
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++m_stats.hdrError;
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m_rxBuffers[m_rxBufferSelector].error = true;
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}
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} else if(*m_rxDma.GetIsReg() & m_rxDma.GetTeMask()) {
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*m_rxDma.GetIcfReg() = m_rxDma.GetTeMask();
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m_rxBuffers[m_rxBufferSelector].error = 1;
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++m_stats.dmaError;
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}
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m_rxBufferSelector = !m_rxBufferSelector;
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if(m_rxBuffers[m_rxBufferSelector].busy)
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++m_stats.overrun;
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SetupReceive();
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}
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void LL_HsUsart::CrcSucceeded(uintptr_t callbackParam, uint32_t crc, int prio)
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{
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Buffer &buf(m_rxBuffers[static_cast<int>(callbackParam)]);
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buf.busy = 1;
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if(*(uint32_t*) (buf.packet.payload + RoundUpTo4((uint16_t)buf.packet.header.payloadLength)) != crc) {
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buf.error = 1;
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buf.errorInfo = crc;
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++m_stats.payloadErrror;
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}
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if(m_userCallback)
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buf.busy = !m_userCallback->PacketReceived(this, m_userCallbackParam, buf.packet);
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}
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void LL_HsUsart::CrcFailed(uintptr_t callbackParam, uint32_t crc, int prio)
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{
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Buffer &buf(m_rxBuffers[static_cast<int>(callbackParam)]);
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buf.busy = buf.error = true;
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buf.errorInfo = 0;
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++m_stats.payloadErrror;
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if(m_userCallback)
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buf.busy = !m_userCallback->PacketReceived(this, m_userCallbackParam, buf.packet);
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}
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void LL_HsUsart::TxDmaIrq()
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{
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if(*m_txDma.GetIsReg() & m_txDma.GetTcMask()) { // DMA transfer complete
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*m_txDma.GetIcfReg() = m_txDma.GetTcMask();
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LL_USART_EnableIT_TC(m_usart);
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LL_DMA_DisableStream(m_txDma.GetDma(), m_txDma.GetStream());
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}
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else if(*m_txDma.GetIsReg() & m_txDma.GetTeMask()) {
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*m_txDma.GetIcfReg() = m_txDma.GetTeMask();
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m_txBuffer.error = 1;
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++m_stats.dmaError;
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}
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if(*m_txDma.GetIsReg() & m_txDma.GetFeMask())
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*m_txDma.GetIcfReg() = m_txDma.GetFeMask();
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if(*m_txDma.GetIsReg() & m_txDma.GetHtMask())
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*m_txDma.GetIcfReg() = m_txDma.GetHtMask();
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if(*m_txDma.GetIsReg() & m_txDma.GetDmeMask())
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*m_txDma.GetIcfReg() = m_txDma.GetDmeMask();
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}
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} // namespace f4ll
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