dma works

Src/main.c

@@ -100,7 +100,7 @@ void init_UART1_dma(){
     USART1->CR3 |= USART_CR3_EIE; // Interrupt on BREAK (and other errors)
     USART1->CR3 |= USART_CR3_DMAR; // DMA Receiver mode
 
-        DMA1_Channel1->CCR = (0x02 << DMA_CCR_PL_Pos) | DMA_CCR_MINC | DMA_CCR_TCIE;
+    DMA1_Channel1->CCR = (0x02 << DMA_CCR_PL_Pos) | DMA_CCR_MINC | DMA_CCR_TCIE;
 
     DMA1_Channel1->CMAR  = ( uint32_t )&rxBuffer[0];
     DMA1_Channel1->CPAR  = ( uint32_t )&(USART1->RDR);
@@ -109,7 +109,6 @@ void init_UART1_dma(){
     DMAMUX1_Channel0->CCR &= ~( DMAMUX_CxCR_DMAREQ_ID );
     DMAMUX1_Channel0->CCR |=  ( 50 << DMAMUX_CxCR_DMAREQ_ID_Pos ); // 50 -> USART1 RX
 
-
     USART1->CR1 |= USART_CR1_UE;
 
     HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
@@ -119,9 +118,25 @@ void init_UART1_dma(){
     HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
 }
 
+void Reset_DMA(void) {
+    // Disable the DMA channel
+    DMA1_Channel1->CCR &= ~DMA_CCR_EN; // Disable DMA Channel 1
+
+    // Clear the transfer complete flag
+    DMA1->IFCR |= DMA_IFCR_CTCIF1; // Clear transfer complete flag for Channel 1
+
+    // Reconfigure the DMA
+    DMA1_Channel1->CMAR = (uint32_t)rxBuffer; // Set memory address to the start of the buffer
+    DMA1_Channel1->CNDTR = BUFFER_SIZE; // Set number of data items to transfer
+
+    // Enable the DMA channel again
+    DMA1_Channel1->CCR |= DMA_CCR_EN; // Enable DMA Channel 1
+}
+
 void USART1_IRQHandler(){
     SEGGER_SYSVIEW_RecordEnterISR();
      if(USART1->ISR & USART_ISR_RXNE_RXFNE){
+         //SEGGER_SYSVIEW_PrintfHost("RXNE");
          //printf("%x ", USART1->RDR);
          rxBuffer[rxBufferPos++] = USART1->RDR;
          if(rxBufferPos >= BUFFER_SIZE){
@@ -134,15 +149,19 @@ void USART1_IRQHandler(){
          //if(rxBufferPos != 514)
          //    printf("FE after %d\n",rxBufferPos);
          //rxBufferPos = 0;
-         printf("FE\n");
          //DMA1_Channel1->CNDTR = 1;
-         DMA1_Channel1->CNDTR = 5;
-         DMA1_Channel1->CCR |= ( DMA_CCR_EN );
+         SEGGER_SYSVIEW_PrintfHost("FE");
+         Reset_DMA();
+         //DMA1_Channel1->CCR &= ~( DMA_CCR_EN );
+         //DMA1_Channel1->CNDTR = 512;
+         //DMA1_Channel1->CMAR  = ( uint32_t )&rxBuffer[0];
          //DMA1_Channel1->CCR |= ( DMA_CCR_EN );
+         ////DMA1_Channel1->CCR |= ( DMA_CCR_EN );
      }
      if(USART1->ISR & USART_ISR_ORE){
          USART1->ICR = USART_ICR_ORECF;
          //printf("ORE\n");
+         //SEGGER_SYSVIEW_PrintfHost("ORE");
      }
      if(USART1->ISR & USART_ISR_NE){
          USART1->ICR = USART_ICR_NECF;
@@ -159,9 +178,8 @@ void DMA1_Channel1_IRQHandler(){
     SEGGER_SYSVIEW_RecordEnterISR();
     if(DMA1->ISR & DMA_ISR_TCIF1){
         DMA1->IFCR = DMA_IFCR_CTCIF1;
-        DMA1_Channel1->CCR &= ~( DMA_CCR_EN );
-        DMA1_Channel1->CMAR  = ( uint32_t )&rxBuffer[0];
     }
+    SEGGER_SYSVIEW_PrintfHost("DMA");
     SEGGER_SYSVIEW_RecordExitISR();
 }
 /* USER CODE END 0 */