f407ve_hs_uart/lib/ll_crchandler.cpp
2019-11-08 14:11:08 +01:00

156 lines
4.4 KiB
C++

/*
* ll_crchandler.cpp
*
* Created on: Oct 26, 2019
* Author: compi
*/
#include "ll_crchandler.h"
namespace f4ll {
LL_CrcHandler::LL_CrcHandler(DMA_TypeDef *dma, uint32_t stream)
: m_dma(dma, stream)
{
LL_DMA_EnableIT_TC(dma, stream);
LL_DMA_EnableIT_TE(dma, stream);
LL_DMA_SetM2MDstAddress(dma, stream, (uint32_t)&CRC->DR);
}
void LL_CrcHandler::AttachSlot(SlotBase &slot)
{
for(unsigned int i = 0; i < slot.m_taskCount; ++i ) {
auto &task(slot[i]);
task.m_address = nullptr;
task.m_wordCount = 0;
task.m_callback = nullptr;
task.m_callbackParam = 0;
}
slot.m_next = m_firstSlot;
uint32_t prim = __get_PRIMASK();
__disable_irq();
m_firstSlot = &slot;
__set_PRIMASK(prim);
}
bool LL_CrcHandler::Enqueue(SlotBase &slot, uint8_t prio, void const *address, uint16_t len, ICallback *cb, uintptr_t cbParam)
{
uint32_t prim = __get_PRIMASK();
bool immediate;
// TODO: do we need sanity check here? (is slot attached, is prio in range, etc...?)
while(IsActive(slot,prio));
__disable_irq();
immediate = m_activeSlot == nullptr;
slot[prio].m_address = (!immediate) ? address : nullptr;
slot[prio].m_wordCount = (len+3)/4;
slot[prio].m_callback = cb;
slot[prio].m_callbackParam = cbParam;
if(immediate) {
m_activeSlot = &slot;
m_activePrio = prio;
}
__set_PRIMASK(prim);
if(immediate) {
CRC->CR = 1;
LL_DMA_SetM2MSrcAddress(m_dma.GetDma(), m_dma.GetStream(), (uint32_t)address);
LL_DMA_SetDataLength(m_dma.GetDma(), m_dma.GetStream(), (len+3)/4);
LL_DMA_EnableStream(m_dma.GetDma(), m_dma.GetStream());
}
return immediate;
}
bool LL_CrcHandler::IsActive(SlotBase &slot, uint8_t prio) const
{
return prio < slot.m_taskCount && slot[prio].m_wordCount != 0;
}
bool LL_CrcHandler::IsQueued(SlotBase &slot, uint8_t prio) const
{
return prio < slot.m_taskCount && slot[prio].m_address != nullptr;
}
bool LL_CrcHandler::IsRunning(SlotBase &slot, uint8_t prio) const
{
return prio < slot.m_taskCount && slot[prio].m_wordCount && ! slot[prio].m_address;
}
void LL_CrcHandler::DmaTransferCompleted(void)
{
if(* m_dma.GetIsReg() & m_dma.GetTcMask()) { // DMA transfer complete
* m_dma.GetIfcReg() = m_dma.GetTcMask();
LL_DMA_DisableStream(m_dma.GetDma(), m_dma.GetStream());
if(m_activeSlot) {
if((*m_activeSlot)[m_activePrio].m_callback)
(*m_activeSlot)[m_activePrio].m_callback->CrcSucceeded((*m_activeSlot)[m_activePrio].m_callbackParam, CRC->DR, m_activePrio);
else if((*m_activeSlot)[m_activePrio].m_callbackParam)
*reinterpret_cast<uint32_t*>((*m_activeSlot)[m_activePrio].m_callbackParam) = CRC->DR;
}
}
else if(*m_dma.GetIsReg() & m_dma.GetTeMask()) { // DMA transfer error
*m_dma.GetIfcReg() = m_dma.GetTeMask();
LL_DMA_DisableStream(m_dma.GetDma(), m_dma.GetStream());
if(m_activeSlot) {
if((*m_activeSlot)[m_activePrio].m_callback)
(*m_activeSlot)[m_activePrio].m_callback->CrcFailed((*m_activeSlot)[m_activePrio].m_callbackParam, CRC->DR, m_activePrio);
else if((*m_activeSlot)[m_activePrio].m_callbackParam)
*reinterpret_cast<uint32_t*>((*m_activeSlot)[m_activePrio].m_callbackParam) = -1;
}
}
(*m_activeSlot)[m_activePrio].m_callback = nullptr;
(*m_activeSlot)[m_activePrio].m_callbackParam = 0;
(*m_activeSlot)[m_activePrio].m_wordCount = 0;
StartNextTask();
}
void LL_CrcHandler::StartNextTask(void)
{
bool stillMore;
int index = 0;
do {
SlotBase *slot = m_firstSlot;
stillMore = false;
while(slot) {
if(index < slot->m_taskCount) {
if((*slot)[index].m_address) {
m_activeSlot = slot;
m_activePrio = index;
CRC->CR = 1;
LL_DMA_SetM2MSrcAddress(m_dma.GetDma(), m_dma.GetStream(), reinterpret_cast<uint32_t>((*slot)[index].m_address));
LL_DMA_SetDataLength(m_dma.GetDma(), m_dma.GetStream(), (*slot)[index].m_wordCount);
LL_DMA_EnableStream(m_dma.GetDma(), m_dma.GetStream());
(*slot)[index].m_address = nullptr; // marking as started
return;
}
if(index + 1 < slot->m_taskCount)
stillMore = true;
}
slot = slot->m_next;
}
++index;
} while(stillMore);
m_activeSlot = nullptr;
}
void LL_CrcHandler::WaitResults(SlotBase &slot, uint8_t prio) const
{
while(IsQueued(slot, prio));
while(IsActive(slot, prio));
}
uint32_t LL_CrcHandler::Compute(
SlotBase &slot, uint8_t prio, void const *address, uint16_t len)
{
uint32_t result;
Enqueue(slot, prio, address, len, nullptr, reinterpret_cast<uintptr_t>(&result));
while(IsActive(slot, prio));
return result;
}
} // namespace f4ll