I'm trying to 500ms once transmit 5 byte of data. but 2 byte of data only transmit . below i given my code . i don't know where i made mistake if any one know help me.
UART_HandleTypeDef huart2;
DMA_HandleTypeDef hdma_usart2_tx;
DMA_HandleTypeDef hdma_usart2_rx;
uint8_t Tx_data[5] = {0, 0, 0, 0, 0};
uint8_t Rx_data[1];
uint32_t Aout[3];
int status = 0, test = 0;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART2_UART_Init(void);
void TIM1_init(void)
{
RCC->APBENR2 |= RCC_APBENR2_TIM1EN; // TIM1 CLOCK ENABLE
TIM1->PSC = 1-1; //PERSCALER VALUE IS 0-65535
TIM1->ARR = 2000-1; //ARR VALUE IS 0-65535
TIM1->RCR = 0;
TIM1->BDTR |= TIM_BDTR_MOE; // Main output enable
TIM1->EGR = TIM_EGR_UG; // Update generation
TIM1->DIER |= (TIM_DIER_UIE); // Update interrupt enable
NVIC_EnableIRQ(TIM1_BRK_UP_TRG_COM_IRQn);
TIM1->CNT = 0; //COUNT START IN 0
TIM1->CR1 |= (TIM_CR1_CEN); // COUNTER ENABLE
}
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_DMA_Init();
MX_USART2_UART_Init();
HAL_UART_Receive_DMA(&huart2, Rx_data, 1);
HAL_UART_Transmit_DMA(&huart2, Tx_data, sizeof(Tx_data));
TIM1_init();
while (1)
{
HAL_UART_TxCpltCallback(&huart2);
}
}
static void MX_USART2_UART_Init(void)
{
huart2.Instance = USART2;
huart2.Init.BaudRate = 9600;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart2) != HAL_OK)
{
Error_Handler();
}
}
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Channel1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
/* DMA1_Channel2_3_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel2_3_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
}
void TIM1_BRK_UP_TRG_COM_IRQHandler(void)
{
TIM1->SR &= ~TIM_SR_UIF;
test++;
if(test == 8000)
{
__HAL_DMA_ENABLE(huart2.hdmatx);
status++;
}
}
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
if(status == 1)
{
test=0;
Tx_data[0] = 0x04;
Tx_data[1] = 0x00;
Tx_data[2] = 0x09;
Tx_data[3] = 0x05;
Tx_data[4] = 0x66;
if((USART2->ISR & USART_ISR_TC) != 1)
{
__HAL_DMA_DISABLE(huart2.hdmatx);
status = 0;
}
}
}
