f407ve_hs_uart/components/f4ll/src/ll_hsusart.cpp
2019-11-12 14:54:39 +01:00

237 lines
5.4 KiB
C++

/*
* ll_hsusart_impl.h
*
* Created on: Oct 29, 2019
* Author: abody
*/
#include <string.h>
#include "f4ll/ll_hsusart.h"
namespace f4ll {
template<typename T> static inline T RoundUpTo4(T input)
{
return (input + 3) & (((T)-1) - 3);
}
LL_HsUsart::LL_HsUsart(USART_TypeDef *usart, DMA_TypeDef *dma, uint32_t streamRx, uint32_t streamTx)
: LL_UsartCore(usart, dma, streamRx, streamTx)
{
LL_CrcHandler::Instance().AttachSlot(m_crcSlot);
}
uint8_t *LL_HsUsart::GetTxPacketBuffer(void)
{
return m_txBuffer.packet.payload;
}
USART_TypeDef* LL_HsUsart::GetUsart(void)
{
return m_usart;
}
LL_HsUsart::Stats const & LL_HsUsart::GetStats(void)
{
return m_stats;
}
bool LL_HsUsart::IsTxBusy()
{
return m_txBuffer.busy;
}
bool LL_HsUsart::IsTxFailed()
{
return m_txBuffer.error;
}
bool LL_HsUsart::IsRxBusy(bool second)
{
return m_rxBuffers[second].busy;
}
bool LL_HsUsart::IsRxFailed(bool second)
{
return m_rxBuffers[second].error;
}
void LL_HsUsart::RxProcessed(bool second)
{
m_rxBuffers[second].busy = false;
m_rxBuffers[second].error = false;
}
void LL_HsUsart::SetCallback(IHsUsartCallback *callback, uintptr_t callbackParam)
{
m_userCallback = callback;
m_userCallbackParam = callbackParam;
}
void LL_HsUsart::BuildHeader(Packet &packet, uint8_t serialNo, uint8_t length)
{
uint8_t hash = STARTMARKER;
packet.header.startByte = STARTMARKER;
packet.header.serial = serialNo;
hash ^= serialNo;
packet.header.payloadLength = length;
hash ^= length;
packet.header.hash = hash;
}
bool LL_HsUsart::CheckHeader(PacketHeader &header)
{
return header.startByte == STARTMARKER && (header.startByte ^ header.serial ^ header.payloadLength) == header.hash;
}
void LL_HsUsart::PostPacket(uint8_t const *payload, uint8_t length, bool waitForCrcQueue)
{
uint16_t payloadLength = RoundUpTo4((uint16_t)length);
BuildHeader(m_txBuffer.packet, m_txSerialNo++, length);
if(payload)
memcpy(m_txBuffer.packet.payload, payload, length);
m_txBuffer.requestedLength = sizeof(m_txBuffer.packet.header) + payloadLength + sizeof(uint32_t);
m_txBuffer.busy = true;
m_txBuffer.error = false;
LL_CrcHandler::Instance().Enqueue(m_crcSlot, 0, &m_txBuffer.packet, sizeof(PacketHeader) + payloadLength,
nullptr, reinterpret_cast<uintptr_t>(m_txBuffer.packet.payload + payloadLength));
while(waitForCrcQueue && LL_CrcHandler::Instance().IsQueued(m_crcSlot, 0));
SetupTransmit(&m_txBuffer.packet, m_txBuffer.requestedLength);
++m_stats.sent;
}
void LL_HsUsart::SetupReceive()
{
m_rxBuffers[m_rxBufferSelector].requestedLength = sizeof(m_rxBuffers[m_rxBufferSelector].packet);
LL_UsartCore::SetupReceive(&m_rxBuffers[m_rxBufferSelector], sizeof(m_rxBuffers[m_rxBufferSelector].packet));
}
void LL_HsUsart::ReceiverIdle(void)
{
uint16_t rcvdLen = m_rxBuffers[m_rxBufferSelector].requestedLength - LL_DMA_GetDataLength(m_rxDma.GetDma(), m_rxDma.GetStream());
if(rcvdLen >= sizeof(PacketHeader)) {
if(CheckHeader(m_rxBuffers[m_rxBufferSelector].packet.header)) {
if(rcvdLen >= sizeof(PacketHeader) +
RoundUpTo4((uint16_t)m_rxBuffers[m_rxBufferSelector].packet.header.payloadLength)
+ sizeof(uint32_t))
LL_DMA_DisableStream(m_rxDma.GetDma(), m_rxDma.GetStream());
else
++m_stats.premature_payload;
} else {
m_rxBuffers[m_rxBufferSelector].error = 1;
LL_DMA_DisableStream(m_rxDma.GetDma(), m_rxDma.GetStream());
}
} else
++m_stats.premature_hdr;
}
void LL_HsUsart::TransmissionComplete(void)
{
LL_USART_DisableDirectionTx(m_usart); // enforcing an idle frame
LL_USART_EnableDirectionTx(m_usart);
m_txBuffer.busy = 0;
}
void LL_HsUsart::RxDmaTransferComplete(void)
{
if(CheckHeader(m_rxBuffers[m_rxBufferSelector].packet.header))
LL_CrcHandler::Instance().Enqueue(m_crcSlot, 1,
&m_rxBuffers[m_rxBufferSelector].packet,
sizeof(PacketHeader) + RoundUpTo4((uint16_t)m_rxBuffers[m_rxBufferSelector].packet.header.payloadLength),
this, m_rxBufferSelector);
else {
++m_stats.hdrError;
m_rxBuffers[m_rxBufferSelector].error = true;
}
SwitchRxBuffers();
}
void LL_HsUsart::RxDmaHalfTransfer(void)
{
}
void LL_HsUsart::RxDmaError(LL_DmaHelper::DmaErrorType reason)
{
m_rxBuffers[m_rxBufferSelector].error = 1;
++m_stats.rxDmaError;
SwitchRxBuffers();
}
void LL_HsUsart::TxDmaTransferComplete(void)
{
LL_USART_EnableIT_TC(m_usart);
LL_DMA_DisableStream(m_txDma.GetDma(), m_txDma.GetStream());
}
void LL_HsUsart::TxDmaHalfTransfer(void)
{
}
void LL_HsUsart::TxDmaError(LL_DmaHelper::DmaErrorType reason)
{
m_txBuffer.error = 1;
++m_stats.txDmaError;
}
void LL_HsUsart::SwitchRxBuffers(void)
{
++m_stats.rcvd;
m_rxBufferSelector = !m_rxBufferSelector;
if(m_rxBuffers[m_rxBufferSelector].busy)
++m_stats.overrun;
SetupReceive();
}
void LL_HsUsart::CrcSucceeded(uintptr_t callbackParam, uint32_t crc, uint8_t task)
{
Buffer &buf(m_rxBuffers[static_cast<int>(callbackParam)]);
buf.busy = 1;
if(*(uint32_t*) (buf.packet.payload + RoundUpTo4((uint16_t)buf.packet.header.payloadLength)) != crc) {
buf.error = 1;
buf.errorInfo = crc;
++m_stats.payloadErrror;
}
if(m_userCallback)
buf.busy = !m_userCallback->PacketReceived(this, m_userCallbackParam, buf.packet);
}
void LL_HsUsart::CrcFailed(uintptr_t callbackParam, uint32_t crc, uint8_t task)
{
Buffer &buf(m_rxBuffers[static_cast<int>(callbackParam)]);
buf.busy = buf.error = true;
buf.errorInfo = 0;
++m_stats.payloadErrror;
if(m_userCallback)
buf.busy = !m_userCallback->PacketReceived(this, m_userCallbackParam, buf.packet);
}
} // namespace f4ll