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/*
* Copyright (c) 2022 OpenLuat & AirM2M
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "user.h"
typedef struct
{
CBFuncEx_t Callback;
void *pParam;
uint16_t *TxData;
uint32_t Pos;
uint32_t MaxLen;
uint32_t Freq;
uint8_t DMATxStream;
uint8_t IsBusy;
}DAC_ResourceStruct;
static DAC_ResourceStruct prvDAC;
static int32_t DAC_DMADoneCB(void *pData, void *pParam)
{
uint32_t TxLevel;
if (prvDAC.MaxLen > prvDAC.Pos)
{
TxLevel = ((prvDAC.MaxLen - prvDAC.Pos) > 4090)?4000:(prvDAC.MaxLen - prvDAC.Pos);
DMA_ClearStreamFlag(prvDAC.DMATxStream);
DMA_ForceStartStream(prvDAC.DMATxStream, &prvDAC.TxData[prvDAC.Pos], TxLevel, DAC_DMADoneCB, NULL, 1);
prvDAC.Pos += TxLevel;
}
else
{
prvDAC.IsBusy = 0;
prvDAC.Callback(NULL, prvDAC.pParam);
}
}
static int32_t DAC_DummyCB(void *pData, void *pParam)
{
DBG("!");
return 0;
}
void DAC_Init(uint8_t Stream)
{
DMA_InitTypeDef DMA_InitStruct;
DMA_BaseConfig(&DMA_InitStruct);
DMA_InitStruct.DMA_Peripheral = SYSCTRL_PHER_CTRL_DMA_CHx_IF_DAC;
DMA_InitStruct.DMA_PeripheralBurstSize = DMA_BurstSize_8;
DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)&DAC->DAC_DATA;
DMA_InitStruct.DMA_Priority = DMA_Priority_3;
DMA_InitStruct.DMA_MemoryBurstSize = DMA_BurstSize_8;
DMA_InitStruct.DMA_MemoryDataSize = DMA_DataSize_HalfWord;
DMA_InitStruct.DMA_PeripheralDataSize = DMA_DataSize_HalfWord;
DMA_ConfigStream(Stream, &DMA_InitStruct);
prvDAC.DMATxStream = Stream;
}
void DAC_Setup(uint32_t Freq, uint32_t OutRMode)
{
uint32_t Ctrl;
while (DAC->DAC_CR1 & (1 << 29));
DAC->DAC_CR1 = (OutRMode << 5) | 0x0c;
DAC->DAC_TIMER = ((SystemCoreClock >> 3) / Freq) - 1;
DAC->DAC_FIFO_THR = 7;
}
void DAC_Send(const uint16_t *Data, uint32_t Len, CBFuncEx_t Callback, void *pParam)
{
uint32_t TxLevel;
if (prvDAC.IsBusy)
{
DMA_PrintReg(prvDAC.DMATxStream);
return;
}
prvDAC.IsBusy = 1;
prvDAC.TxData = Data;
prvDAC.MaxLen = Len;
prvDAC.Pos = 0;
if (Callback)
{
prvDAC.Callback = Callback;
}
else
{
prvDAC.Callback = DAC_DummyCB;
}
prvDAC.pParam = pParam;
TxLevel = ((prvDAC.MaxLen - prvDAC.Pos) > 4090)?4000:(prvDAC.MaxLen - prvDAC.Pos);
prvDAC.Pos += TxLevel;
DMA_ClearStreamFlag(prvDAC.DMATxStream);
DMA_ForceStartStream(prvDAC.DMATxStream, &prvDAC.TxData[prvDAC.Pos], TxLevel, DAC_DMADoneCB, NULL, 1);
}
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