uart config without HAL

Inc/main.h

@@ -41,7 +41,8 @@ extern "C" {
 
 /* Exported constants --------------------------------------------------------*/
 /* USER CODE BEGIN EC */
-
+#define BUFFER_SIZE 8
+extern uint8_t rxBuffer[BUFFER_SIZE];
 /* USER CODE END EC */
 
 /* Exported macro ------------------------------------------------------------*/

Inc/stm32g0xx_hal_conf.h

@@ -55,7 +55,7 @@ extern "C" {
 /* #define HAL_SMBUS_MODULE_ENABLED   */
 /* #define HAL_SPI_MODULE_ENABLED   */
 /* #define HAL_TIM_MODULE_ENABLED   */
-#define HAL_UART_MODULE_ENABLED
+/* #define HAL_UART_MODULE_ENABLED   */
 /* #define HAL_USART_MODULE_ENABLED   */
 /* #define HAL_WWDG_MODULE_ENABLED   */
 #define HAL_GPIO_MODULE_ENABLED

Inc/stm32g0xx_it.h

@@ -51,8 +51,6 @@ void HardFault_Handler(void);
 void SVC_Handler(void);
 void PendSV_Handler(void);
 void SysTick_Handler(void);
-void DMA1_Channel1_IRQHandler(void);
-void DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQHandler(void);
 /* USER CODE BEGIN EFP */
 
 /* USER CODE END EFP */

Makefile

@@ -1,5 +1,5 @@
 ##########################################################################################################################
-# File automatically-generated by tool: [projectgenerator] version: [4.2.0-B44] date: [Thu Apr 24 03:11:06 CEST 2025] 
+# File automatically-generated by tool: [projectgenerator] version: [4.2.0-B44] date: [Fri Apr 25 22:56:53 CEST 2025] 
 ##########################################################################################################################
 
 # ------------------------------------------------
@@ -58,9 +58,7 @@ Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c \
 Drivers/RTT/RTT/SEGGER_RTT.c \
 Drivers/RTT/RTT/SEGGER_RTT_printf.c \
 Drivers/RTT/Syscalls/SEGGER_RTT_Syscalls_GCC.c \
-Src/system_stm32g0xx.c \
+Src/system_stm32g0xx.c
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c \
-Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart_ex.c
 
 # ASM sources
 ASM_SOURCES =  \

Parafraktor.ioc

@@ -2,61 +2,33 @@
 CAD.formats=
 CAD.pinconfig=
 CAD.provider=
-Dma.Request0=USART1_RX
-Dma.RequestsNb=1
-Dma.USART1_RX.0.Direction=DMA_PERIPH_TO_MEMORY
-Dma.USART1_RX.0.EventEnable=DISABLE
-Dma.USART1_RX.0.Instance=DMA1_Channel1
-Dma.USART1_RX.0.MemDataAlignment=DMA_MDATAALIGN_BYTE
-Dma.USART1_RX.0.MemInc=DMA_MINC_ENABLE
-Dma.USART1_RX.0.Mode=DMA_NORMAL
-Dma.USART1_RX.0.PeriphDataAlignment=DMA_PDATAALIGN_BYTE
-Dma.USART1_RX.0.PeriphInc=DMA_PINC_DISABLE
-Dma.USART1_RX.0.Polarity=HAL_DMAMUX_REQ_GEN_RISING
-Dma.USART1_RX.0.Priority=DMA_PRIORITY_LOW
-Dma.USART1_RX.0.RequestNumber=1
-Dma.USART1_RX.0.RequestParameters=Instance,Direction,PeriphInc,MemInc,PeriphDataAlignment,MemDataAlignment,Mode,Priority,SignalID,Polarity,RequestNumber,SyncSignalID,SyncPolarity,SyncEnable,EventEnable,SyncRequestNumber
-Dma.USART1_RX.0.SignalID=NONE
-Dma.USART1_RX.0.SyncEnable=DISABLE
-Dma.USART1_RX.0.SyncPolarity=HAL_DMAMUX_SYNC_NO_EVENT
-Dma.USART1_RX.0.SyncRequestNumber=1
-Dma.USART1_RX.0.SyncSignalID=NONE
 File.Version=6
 GPIO.groupedBy=
 KeepUserPlacement=false
 Mcu.CPN=STM32G0B1VET6
 Mcu.Family=STM32G0
-Mcu.IP0=DMA
+Mcu.IP0=NVIC
-Mcu.IP1=NVIC
+Mcu.IP1=RCC
-Mcu.IP2=RCC
+Mcu.IP2=SYS
-Mcu.IP3=SYS
+Mcu.IPNb=3
-Mcu.IP4=USART1
-Mcu.IPNb=5
 Mcu.Name=STM32G0B1V(B-C-E)Tx
 Mcu.Package=LQFP100
 Mcu.Pin0=PF0-OSC_IN (PF0)
 Mcu.Pin1=PF1-OSC_OUT (PF1)
-Mcu.Pin2=PC4
+Mcu.Pin2=VP_SYS_VS_Systick
-Mcu.Pin3=PC5
+Mcu.Pin3=VP_SYS_VS_DBSignals
-Mcu.Pin4=VP_SYS_VS_Systick
+Mcu.PinsNb=4
-Mcu.Pin5=VP_SYS_VS_DBSignals
-Mcu.PinsNb=6
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32G0B1VETx
 MxCube.Version=6.10.0
 MxDb.Version=DB.6.0.100
-NVIC.DMA1_Channel1_IRQn=true\:0\:0\:false\:false\:true\:false\:true\:true
 NVIC.ForceEnableDMAVector=true
 NVIC.HardFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false
 NVIC.NonMaskableInt_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false
 NVIC.PendSV_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false
 NVIC.SVC_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:true
 NVIC.SysTick_IRQn=true\:3\:0\:false\:false\:true\:false\:true\:false
-PC4.Mode=Asynchronous
-PC4.Signal=USART1_TX
-PC5.Mode=Asynchronous
-PC5.Signal=USART1_RX
 PF0-OSC_IN\ (PF0).Mode=HSE-External-Oscillator
 PF0-OSC_IN\ (PF0).Signal=RCC_OSC_IN
 PF1-OSC_OUT\ (PF1).Mode=HSE-External-Oscillator
@@ -92,7 +64,7 @@ ProjectManager.ToolChainLocation=
 ProjectManager.UAScriptAfterPath=
 ProjectManager.UAScriptBeforePath=
 ProjectManager.UnderRoot=false
-ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,2-MX_GPIO_Init-GPIO-false-HAL-true,3-MX_DMA_Init-DMA-false-HAL-true,4-MX_USART1_UART_Init-USART1-false-HAL-true
+ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,2-MX_GPIO_Init-GPIO-false-HAL-true,3-MX_USART1_UART_Init-USART1-false-HAL-true
 RCC.ADCFreq_Value=32000000
 RCC.AHBFreq_Value=32000000
 RCC.APBFreq_Value=32000000
@@ -136,9 +108,6 @@ RCC.USART3Freq_Value=32000000
 RCC.USBFreq_Value=48000000
 RCC.VCOInputFreq_Value=8000000
 RCC.VCOOutputFreq_Value=64000000
-USART1.BaudRate=250000
-USART1.IPParameters=VirtualMode-Asynchronous,BaudRate
-USART1.VirtualMode-Asynchronous=VM_ASYNC
 VP_SYS_VS_DBSignals.Mode=DisableDeadBatterySignals
 VP_SYS_VS_DBSignals.Signal=SYS_VS_DBSignals
 VP_SYS_VS_Systick.Mode=SysTick

Src/main.c

@@ -23,7 +23,7 @@
 /* USER CODE BEGIN Includes */
 #include "SEGGER_RTT.h"
 #include "stm32g0b1xx.h"
-#include "uart.h"
+#include "stm32g0xx_hal_cortex.h"
 #include <stdint.h>
 #include <stdio.h>
 /* USER CODE END Includes */
@@ -44,8 +44,6 @@
 /* USER CODE END PM */
 
 /* Private variables ---------------------------------------------------------*/
-UART_HandleTypeDef huart1;
-DMA_HandleTypeDef hdma_usart1_rx;
 
 /* USER CODE BEGIN PV */
 
@@ -54,16 +52,33 @@ DMA_HandleTypeDef hdma_usart1_rx;
 /* Private function prototypes -----------------------------------------------*/
 void SystemClock_Config(void);
 static void MX_GPIO_Init(void);
-static void MX_DMA_Init(void);
-static void MX_USART1_UART_Init(void);
 /* USER CODE BEGIN PFP */
 
 /* USER CODE END PFP */
 
 /* Private user code ---------------------------------------------------------*/
 /* USER CODE BEGIN 0 */
-#define BUFFER_SIZE 64
+#define BUFFER_SIZE 8
 uint8_t rxBuffer[BUFFER_SIZE];
+
+void init_UART1(){
+    USART1->CR1 &= ~USART_CR1_UE;
+    RCC->APBENR2 |= RCC_APBENR2_USART1EN;
+    RCC->IOPENR |= RCC_IOPENR_GPIOCEN;
+
+    GPIOC->MODER &= ~GPIO_MODER_MODE5; // Alternate function mode on RX pin
+    GPIOC->MODER |= GPIO_MODER_MODE5_1;
+    GPIOC->AFR[0] &= GPIO_AFRL_AFSEL5;
+    GPIOC->AFR[0] |= 1 << GPIO_AFRL_AFSEL5_Pos;
+
+    USART1->BRR = 128; // 32000000÷250000
+    USART1->CR3 |= USART_CR3_EIE;
+    USART1->CR1 = USART_CR1_RE;
+    USART1->CR1 |= USART_CR1_UE;
+
+    HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
+    HAL_NVIC_EnableIRQ(USART1_IRQn);
+}
 /* USER CODE END 0 */
 
 /**
@@ -95,17 +110,31 @@ int main(void)
 
   /* Initialize all configured peripherals */
   MX_GPIO_Init();
-  MX_DMA_Init();
-  MX_USART1_UART_Init();
   /* USER CODE BEGIN 2 */
-  HAL_UART_Receive_DMA(&huart1, rxBuffer, BUFFER_SIZE);
+  init_UART1(); 
+
+  printf("CR1   init: 0x%02lX\n", USART1->CR1  );
+  printf("CR2   init: 0x%02lX\n", USART1->CR2  );
+  printf("CR3   init: 0x%02lX\n", USART1->CR3  );
+  printf("BRR   init: 0x%02lX\n", USART1->BRR  );
+  printf("GTPR  init: 0x%02lX\n", USART1->GTPR );
+  printf("RTOR  init: 0x%02lX\n", USART1->RTOR );
+  printf("RQR   init: 0x%02lX\n", USART1->RQR  );
+  printf("ISR   init: 0x%02lX\n", USART1->ISR  );
+  printf("ICR   init: 0x%02lX\n", USART1->ICR  );
+  printf("RDR   init: 0x%02lX\n", USART1->RDR  );
+  printf("TDR   init: 0x%02lX\n", USART1->TDR  );
+  printf("PRESC init: 0x%02lX\n", USART1->PRESC);
+
   /* USER CODE END 2 */
 
   /* Infinite loop */
   /* USER CODE BEGIN WHILE */
+  //HAL_UART_Receive_DMA(&huart1, rxBuffer, BUFFER_SIZE);
   while (1)
   {
-      printf("buf: %s\n", rxBuffer);
+     if(USART1->ISR & USART_ISR_RXNE_RXFNE)
+         printf("char: '%c'\n", USART1->RDR);
     /* USER CODE END WHILE */
 
     /* USER CODE BEGIN 3 */
@@ -158,73 +187,6 @@ void SystemClock_Config(void)
 }
 
 /**
-  * @brief USART1 Initialization Function
-  * @param None
-  * @retval None
-  */
-static void MX_USART1_UART_Init(void)
-{
-
-  /* USER CODE BEGIN USART1_Init 0 */
-
-  /* USER CODE END USART1_Init 0 */
-
-  /* USER CODE BEGIN USART1_Init 1 */
-
-  /* USER CODE END USART1_Init 1 */
-  huart1.Instance = USART1;
-  huart1.Init.BaudRate = 250000;
-  huart1.Init.WordLength = UART_WORDLENGTH_8B;
-  huart1.Init.StopBits = UART_STOPBITS_1;
-  huart1.Init.Parity = UART_PARITY_NONE;
-  huart1.Init.Mode = UART_MODE_TX_RX;
-  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
-  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
-  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
-  huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
-  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
-  if (HAL_UART_Init(&huart1) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  /* USER CODE BEGIN USART1_Init 2 */
-
-  /* USER CODE END USART1_Init 2 */
-
-}
-
-/**
-  * Enable DMA controller clock
-  */
-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_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQn interrupt configuration */
-  HAL_NVIC_SetPriority(DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQn, 0, 0);
-  HAL_NVIC_EnableIRQ(DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQn);
-
-}
-
-/**
   * @brief GPIO Initialization Function
   * @param None
   * @retval None
@@ -236,7 +198,6 @@ static void MX_GPIO_Init(void)
 
   /* GPIO Ports Clock Enable */
   __HAL_RCC_GPIOF_CLK_ENABLE();
-  __HAL_RCC_GPIOC_CLK_ENABLE();
 
 /* USER CODE BEGIN MX_GPIO_Init_2 */
 /* USER CODE END MX_GPIO_Init_2 */

Src/stm32g0xx_hal_msp.c

@@ -24,7 +24,6 @@
 /* USER CODE BEGIN Includes */
 
 /* USER CODE END Includes */
-extern DMA_HandleTypeDef hdma_usart1_rx;
 
 /* Private typedef -----------------------------------------------------------*/
 /* USER CODE BEGIN TD */
@@ -82,102 +81,6 @@ void HAL_MspInit(void)
   /* USER CODE END MspInit 1 */
 }
 
-/**
-* @brief UART MSP Initialization
-* This function configures the hardware resources used in this example
-* @param huart: UART handle pointer
-* @retval None
-*/
-void HAL_UART_MspInit(UART_HandleTypeDef* huart)
-{
-  GPIO_InitTypeDef GPIO_InitStruct = {0};
-  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
-  if(huart->Instance==USART1)
-  {
-  /* USER CODE BEGIN USART1_MspInit 0 */
-
-  /* USER CODE END USART1_MspInit 0 */
-
-  /** Initializes the peripherals clocks
-  */
-    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
-    PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1;
-    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
-    {
-      Error_Handler();
-    }
-
-    /* Peripheral clock enable */
-    __HAL_RCC_USART1_CLK_ENABLE();
-
-    __HAL_RCC_GPIOC_CLK_ENABLE();
-    /**USART1 GPIO Configuration
-    PC4     ------> USART1_TX
-    PC5     ------> USART1_RX
-    */
-    GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;
-    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-    GPIO_InitStruct.Pull = GPIO_NOPULL;
-    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
-    GPIO_InitStruct.Alternate = GPIO_AF1_USART1;
-    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
-
-    /* USART1 DMA Init */
-    /* USART1_RX Init */
-    hdma_usart1_rx.Instance = DMA1_Channel1;
-    hdma_usart1_rx.Init.Request = DMA_REQUEST_USART1_RX;
-    hdma_usart1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
-    hdma_usart1_rx.Init.PeriphInc = DMA_PINC_DISABLE;
-    hdma_usart1_rx.Init.MemInc = DMA_MINC_ENABLE;
-    hdma_usart1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
-    hdma_usart1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
-    hdma_usart1_rx.Init.Mode = DMA_NORMAL;
-    hdma_usart1_rx.Init.Priority = DMA_PRIORITY_LOW;
-    if (HAL_DMA_Init(&hdma_usart1_rx) != HAL_OK)
-    {
-      Error_Handler();
-    }
-
-    __HAL_LINKDMA(huart,hdmarx,hdma_usart1_rx);
-
-  /* USER CODE BEGIN USART1_MspInit 1 */
-
-  /* USER CODE END USART1_MspInit 1 */
-  }
-
-}
-
-/**
-* @brief UART MSP De-Initialization
-* This function freeze the hardware resources used in this example
-* @param huart: UART handle pointer
-* @retval None
-*/
-void HAL_UART_MspDeInit(UART_HandleTypeDef* huart)
-{
-  if(huart->Instance==USART1)
-  {
-  /* USER CODE BEGIN USART1_MspDeInit 0 */
-
-  /* USER CODE END USART1_MspDeInit 0 */
-    /* Peripheral clock disable */
-    __HAL_RCC_USART1_CLK_DISABLE();
-
-    /**USART1 GPIO Configuration
-    PC4     ------> USART1_TX
-    PC5     ------> USART1_RX
-    */
-    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4|GPIO_PIN_5);
-
-    /* USART1 DMA DeInit */
-    HAL_DMA_DeInit(huart->hdmarx);
-  /* USER CODE BEGIN USART1_MspDeInit 1 */
-
-  /* USER CODE END USART1_MspDeInit 1 */
-  }
-
-}
-
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */

Src/stm32g0xx_it.c

@@ -22,6 +22,7 @@
 #include "stm32g0xx_it.h"
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
+#include "stdio.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -55,7 +56,7 @@
 /* USER CODE END 0 */
 
 /* External variables --------------------------------------------------------*/
-extern DMA_HandleTypeDef hdma_usart1_rx;
+
 /* USER CODE BEGIN EV */
 
 /* USER CODE END EV */
@@ -140,34 +141,6 @@ void SysTick_Handler(void)
 /* please refer to the startup file (startup_stm32g0xx.s).                    */
 /******************************************************************************/
 
-/**
-  * @brief This function handles DMA1 channel 1 interrupt.
-  */
-void DMA1_Channel1_IRQHandler(void)
-{
-  /* USER CODE BEGIN DMA1_Channel1_IRQn 0 */
-
-  /* USER CODE END DMA1_Channel1_IRQn 0 */
-  HAL_DMA_IRQHandler(&hdma_usart1_rx);
-  /* USER CODE BEGIN DMA1_Channel1_IRQn 1 */
-
-  /* USER CODE END DMA1_Channel1_IRQn 1 */
-}
-
-/**
-  * @brief This function handles DMA1 Ch4 to Ch7, DMA2 Ch1 to Ch5 and DMAMUX1 Overrun Interrupts.
-  */
-void DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQHandler(void)
-{
-  /* USER CODE BEGIN DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQn 0 */
-
-  /* USER CODE END DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQn 0 */
-
-  /* USER CODE BEGIN DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQn 1 */
-
-  /* USER CODE END DMA1_Ch4_7_DMA2_Ch1_5_DMAMUX1_OVR_IRQn 1 */
-}
-
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */