Question
Timer Update DMA with spi is working but remaining is not working
Hi there,
Iam able to send data to external DAC with SPI DMA timer update on the SPI-2, the processor is not halting but we have a UI here on SPI 1 the touch was not working. This is happening after enabling the DMA of SPI-2.
Please find my code where exactly iam doing wrong.
#define CONF_SIGGEN_GEN_FS 880000
#define CONF_SIGGEN_GEN_PERIOD (const) 168000000 / CONF_SIGGEN_GEN_FS
#define CONF_SIGGEN_GEN_BUFFER_SIZE 1000
s16 m_SigGenGenBuffer_ch1[CONF_SIGGEN_GEN_BUFFER_SIZE];
void SigGenInitSigGen(void) {
uint16_t tempPrescalerValue = 0;
SigGenSpiInitData_u tempInitData;
//RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM12, ENABLE);
// Configuration GPIO
IoSpiGpioInit();
/* SPI configuration ------------------------------------------------*/
memset(&tempInitData, 0x00, sizeof(SigGenSpiInitData_u));
tempInitData.spiInitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
tempInitData.spiInitStructure.SPI_Mode = SPI_Mode_Master;
tempInitData.spiInitStructure.SPI_DataSize = SPI_DataSize_16b;
tempInitData.spiInitStructure.SPI_CPOL = SPI_CPOL_Low;
tempInitData.spiInitStructure.SPI_CPHA = SPI_CPHA_1Edge;
tempInitData.spiInitStructure.SPI_NSS = SPI_NSS_Soft;
tempInitData.spiInitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
tempInitData.spiInitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
tempInitData.spiInitStructure.SPI_CRCPolynomial = 10;
SPI_Init(SPI2, &(tempInitData.spiInitStructure));
/* DMA_Channel configuration ---------------------------------*/
memset(&tempInitData, 0x00, sizeof(SigGenSpiInitData_u));
DMA_DeInit(DMA1_Stream4); // De-initialize the DMA Stream (DMA1_Stream4 for SPI2 TX)
tempInitData.dmaInitStructure.DMA_Channel = DMA_Channel_1; // Channel selection
tempInitData.dmaInitStructure.DMA_PeripheralBaseAddr = (uint32_t)&SPI2->DR; // SPI2 data register address
tempInitData.dmaInitStructure.DMA_Memory0BaseAddr = (uint32_t)m_SigGenGenBuffer_ch1; // Memory buffer address
tempInitData.dmaInitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral; // Data direction: Memory to Peripheral
tempInitData.dmaInitStructure.DMA_BufferSize = CONF_SIGGEN_GEN_BUFFER_SIZE; // Buffer size
tempInitData.dmaInitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; // Peripheral increment mode
tempInitData.dmaInitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // Memory increment mode
tempInitData.dmaInitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; // Peripheral data size (16 bits)
tempInitData.dmaInitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; // Memory data size (16 bits)
tempInitData.dmaInitStructure.DMA_Mode = DMA_Mode_Circular; // Circular mode
tempInitData.dmaInitStructure.DMA_Priority = DMA_Priority_VeryHigh; // Priority level
tempInitData.dmaInitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; // FIFO mode
// tempInitData.dmaInitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full; // FIFO threshold
// tempInitData.dmaInitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; // Memory burst
// tempInitData.dmaInitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; // Peripheral burst
DMA_Init(DMA1_Stream4, &tempInitData);
//timer
/* Compute the prescaler value */
tempPrescalerValue = (uint16_t)(SystemCoreClock / 168000000) - 1;
/* Time base configuration */
memset(&tempInitData, 0x00, sizeof(SigGenSpiInitData_u));
tempInitData.timTimeBaseStructure.TIM_Period = (SystemCoreClock / 656250) - 1;
tempInitData.timTimeBaseStructure.TIM_Prescaler = 0;
tempInitData.timTimeBaseStructure.TIM_ClockDivision = 0;
tempInitData.timTimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM7, &(tempInitData.timTimeBaseStructure));
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure2;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseStructure2.TIM_Period = 60;
TIM_TimeBaseStructure2.TIM_Prescaler = 0;
TIM_TimeBaseStructure2.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure2.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM12, &TIM_TimeBaseStructure2);
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = ( CONF_SIGGEN_GEN_PERIOD * 7 / 10 ); // Adjust the pulse width as needed
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC1Init(TIM12, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM12, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM12, ENABLE);
TIM_Cmd(TIM12, ENABLE); // Start Timer 12
/* TIM1 Update DMA Request enable */
TIM_DMACmd(TIM7, TIM_DMA_Update, ENABLE);
/* TIM1 counter enable */
TIM_Cmd(TIM7, ENABLE);
/* Enable SPI DMA Tx request */
/* Enable SPI */
SPI_Cmd(SPI2, ENABLE);
/* Enable the selected DMA interrupts */
DMA_ITConfig(DMA1_Stream4, DMA_IT_HT | DMA_IT_TC, ENABLE);
// /* 1 bit for pre-emption priority, 3 bits for subpriority */
// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
/* Configure and enable DMA interrupt -------------------------------*/
memset(&tempInitData, 0x00, sizeof(SigGenSpiInitData_u));
tempInitData.nvicInitStructure.NVIC_IRQChannel = DMA1_Stream4_IRQn;
tempInitData.nvicInitStructure.NVIC_IRQChannelPreemptionPriority = 0;
tempInitData.nvicInitStructure.NVIC_IRQChannelSubPriority = 0;
tempInitData.nvicInitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&(tempInitData.nvicInitStructure));
/* Enable DMA channels */
DMA_Cmd(DMA1_Stream4, ENABLE);
}
void DMA1_Stream4_IRQHandler(void)
{
if (DMA_GetFlagStatus(DMA1_Stream4, DMA_FLAG_HTIF4) != RESET)
{
// Clear DMA transfer complete flag
DMA_ClearFlag(DMA1_Stream4, DMA_FLAG_HTIF4);
m_SigGenTempGenBufferPtr_ch1 = m_SigGenPingGenBufferPtr_ch1;
m_SigGenData_Op1.ptrCallBackInitGenBuffer();
}
if(DMA_GetFlagStatus(DMA1_Stream4, DMA_FLAG_TCIF4) != RESET)
{
DMA_ClearFlag(DMA1_Stream4, DMA_FLAG_TCIF4);
m_SigGenTempGenBufferPtr_ch1 = m_SigGenPongGenBufferPtr_ch1;
m_SigGenData_Op1.ptrCallBackInitGenBuffer();
}
}