MX - enable DMA on DAC using TIMER6 as trigger source

Timer6 triggers the DAC. When the DAC gets triggered, it moves the hold register to the output register and fires a DMA request. So, the TIMER6 defines the sampling rate of the DAC using prescaler and period.

Core/Inc/cppmain.h

@@ -13,10 +13,10 @@
 extern "C" {
 #endif
 
-    void irq1();
-    void timer_cb();
-    void cppmain(void);
-
+    void heck_irq1();
+    void heck_timer_cb();
+    void heck_cppmain(void);
+    void heck_error_handler();
 #ifdef __cplusplus
 };
 #endif

Core/Inc/stm32f4xx_it.h

@@ -54,6 +54,7 @@ void UsageFault_Handler(void);
 void DebugMon_Handler(void);
 void SysTick_Handler(void);
 void EXTI0_IRQHandler(void);
+void DMA1_Stream5_IRQHandler(void);
 void TIM2_IRQHandler(void);
 void OTG_FS_IRQHandler(void);
 /* USER CODE BEGIN EFP */

Core/Inc/tim.h

@@ -34,11 +34,14 @@ extern "C" {
 
 extern TIM_HandleTypeDef htim2;
 
+extern TIM_HandleTypeDef htim6;
+
 /* USER CODE BEGIN Private defines */
 
 /* USER CODE END Private defines */
 
 void MX_TIM2_Init(void);
+void MX_TIM6_Init(void);
 
 /* USER CODE BEGIN Prototypes */
 

Core/Src/cppmain.cc

@@ -17,6 +17,19 @@
 
 const double pi{ std::acos(-1) };
 
+#define NS 128
+uint32_t Wave_LUT[NS] = {
+    2048, 2149, 2250, 2350, 2450, 2549, 2646, 2742, 2837, 2929, 3020, 3108, 3193, 3275, 3355, 3431,
+    3504, 3574, 3639, 3701, 3759, 3812, 3861, 3906, 3946, 3982, 4013, 4039, 4060, 4076, 4087, 4094,
+    4095, 4091, 4082, 4069, 4050, 4026, 3998, 3965, 3927, 3884, 3837, 3786, 3730, 3671, 3607, 3539,
+    3468, 3394, 3316, 3235, 3151, 3064, 2975, 2883, 2790, 2695, 2598, 2500, 2400, 2300, 2199, 2098,
+    1997, 1896, 1795, 1695, 1595, 1497, 1400, 1305, 1212, 1120, 1031, 944,  860,  779,  701,  627,
+    556,  488,  424,  365,  309,  258,  211,  168,  130,  97,   69,   45,   26,   13,   4,    0,
+    1,    8,    19,   35,   56,   82,   113,  149,  189,  234,  283,  336,  394,  456,  521,  591,
+    664,  740,  820,  902,  987,  1075, 1166, 1258, 1353, 1449, 1546, 1645, 1745, 1845, 1946, 2047
+};
+
+
 // Serial Logging
 // --------------
 
@@ -65,7 +78,8 @@ void led_green_off()
     HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin, GPIO_PIN_RESET);
 }
 
-void dac1_toggle() {
+void dac1_toggle()
+{
     static bool dac_state{ 0 };
     dac_state = !dac_state;
     if (dac_state) {
@@ -77,15 +91,15 @@ void dac1_toggle() {
 // MAIN
 // ----
 
-void irq1()
+void heck_irq1()
 {
     led_green_toggle();
 }
 
 
-void timer_cb()
+void heck_timer_cb()
 {
-    dac1_toggle();
+    //    dac1_toggle();
     led_green_toggle();
     log("timerUP");
 }
@@ -94,7 +108,6 @@ void timer_cb()
 // HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
 void bytebeat()
 {
-    HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
     long t{ 0 };
     while (true) {
         unsigned char res = t * ((t >> 12 | t >> 8) & 63 & t >> 4);
@@ -105,12 +118,27 @@ void bytebeat()
     }
 }
 
-void cppmain(void)
+void heck_cppmain(void)
 {
-    HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
-    HAL_TIM_Base_Start_IT(&htim2);
+
+    //    HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
+    //    HAL_DAC_Start(&hdac, DAC_CHANNEL_2);
+    //    HAL_TIM_Base_Start_IT(&htim2);
+
+    // gen LUT
+
+
+    HAL_TIM_Base_Start(&htim6);
+
     while (true) {
         log("huhu");
-        HAL_Delay(1000);
+//        HAL_Delay(5);
+        HAL_DAC_Start_DMA(&hdac, DAC_CHANNEL_1, (uint32_t *)Wave_LUT, 128, DAC_ALIGN_12B_R);
     }
 }
+
+
+void heck_error_handler()
+{
+    log("HECK ERRRRROR HANDLER");
+}

Core/Src/dac.c

@@ -25,6 +25,7 @@
 /* USER CODE END 0 */
 
 DAC_HandleTypeDef hdac;
+DMA_HandleTypeDef hdma_dac1;
 
 /* DAC init function */
 void MX_DAC_Init(void)
@@ -50,7 +51,8 @@ void MX_DAC_Init(void)
 
   /** DAC channel OUT1 config
   */
-  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
+  sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
+//  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
   sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
   if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)
   {
@@ -59,6 +61,7 @@ void MX_DAC_Init(void)
 
   /** DAC channel OUT2 config
   */
+  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
   if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_2) != HAL_OK)
   {
     Error_Handler();
@@ -91,6 +94,25 @@ void HAL_DAC_MspInit(DAC_HandleTypeDef* dacHandle)
     GPIO_InitStruct.Pull = GPIO_NOPULL;
     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
+    /* DAC DMA Init */
+    /* DAC1 Init */
+    hdma_dac1.Instance = DMA1_Stream5;
+    hdma_dac1.Init.Channel = DMA_CHANNEL_7;
+    hdma_dac1.Init.Direction = DMA_MEMORY_TO_PERIPH;
+    hdma_dac1.Init.PeriphInc = DMA_PINC_DISABLE;
+    hdma_dac1.Init.MemInc = DMA_MINC_ENABLE;
+    hdma_dac1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
+    hdma_dac1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
+    hdma_dac1.Init.Mode = DMA_NORMAL;
+    hdma_dac1.Init.Priority = DMA_PRIORITY_LOW;
+    hdma_dac1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
+    if (HAL_DMA_Init(&hdma_dac1) != HAL_OK)
+    {
+      Error_Handler();
+    }
+
+    __HAL_LINKDMA(dacHandle,DMA_Handle1,hdma_dac1);
+
   /* USER CODE BEGIN DAC_MspInit 1 */
 
   /* USER CODE END DAC_MspInit 1 */
@@ -114,6 +136,8 @@ void HAL_DAC_MspDeInit(DAC_HandleTypeDef* dacHandle)
     */
     HAL_GPIO_DeInit(GPIOA, GPIO_PIN_4|GPIO_PIN_5);
 
+    /* DAC DMA DeInit */
+    HAL_DMA_DeInit(dacHandle->DMA_Handle1);
   /* USER CODE BEGIN DAC_MspDeInit 1 */
 
   /* USER CODE END DAC_MspDeInit 1 */

Core/Src/freertos.c

@@ -119,7 +119,7 @@ void StartDefaultTask(void *argument)
   MX_USB_DEVICE_Init();
   /* USER CODE BEGIN StartDefaultTask */
   /* Infinite loop */
-  cppmain();
+  heck_cppmain();
 //  for(;;)
 //  {
 //    osDelay(1);

Core/Src/main.c

@@ -20,6 +20,7 @@
 #include "main.h"
 #include "cmsis_os.h"
 #include "dac.h"
+#include "dma.h"
 #include "tim.h"
 #include "usb_device.h"
 #include "gpio.h"
@@ -90,8 +91,10 @@ int main(void)
 
   /* Initialize all configured peripherals */
   MX_GPIO_Init();
+  MX_DMA_Init();
   MX_DAC_Init();
   MX_TIM2_Init();
+  MX_TIM6_Init();
   /* USER CODE BEGIN 2 */
 
   /* USER CODE END 2 */
@@ -164,14 +167,14 @@ void SystemClock_Config(void)
 void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
 {
   if(GPIO_Pin == BUT_BLUE_Pin) {
-    irq1();
+    heck_irq1();
   } else {
     __NOP();
   }
 }
 
 void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef* htim) {
-  timer_cb();
+//  heck_timer_cb();
 }
 
 /* USER CODE END 4 */
@@ -184,6 +187,7 @@ void Error_Handler(void)
 {
   /* USER CODE BEGIN Error_Handler_Debug */
   /* User can add his own implementation to report the HAL error return state */
+  heck_error_handler();
   __disable_irq();
   while (1)
   {

Core/Src/stm32f4xx_it.c

@@ -58,6 +58,7 @@
 
 /* External variables --------------------------------------------------------*/
 extern PCD_HandleTypeDef hpcd_USB_OTG_FS;
+extern DMA_HandleTypeDef hdma_dac1;
 extern TIM_HandleTypeDef htim2;
 /* USER CODE BEGIN EV */
 
@@ -197,6 +198,20 @@ void EXTI0_IRQHandler(void)
   /* USER CODE END EXTI0_IRQn 1 */
 }
 
+/**
+  * @brief This function handles DMA1 stream5 global interrupt.
+  */
+void DMA1_Stream5_IRQHandler(void)
+{
+  /* USER CODE BEGIN DMA1_Stream5_IRQn 0 */
+
+  /* USER CODE END DMA1_Stream5_IRQn 0 */
+  HAL_DMA_IRQHandler(&hdma_dac1);
+  /* USER CODE BEGIN DMA1_Stream5_IRQn 1 */
+
+  /* USER CODE END DMA1_Stream5_IRQn 1 */
+}
+
 /**
   * @brief This function handles TIM2 global interrupt.
   */

Core/Src/tim.c

@@ -25,11 +25,12 @@
 /* USER CODE END 0 */
 
 TIM_HandleTypeDef htim2;
+TIM_HandleTypeDef htim6;
+
 
 /* TIM2 init function */
 void MX_TIM2_Init(void)
 {
-
   /* USER CODE BEGIN TIM2_Init 0 */
 
   /* USER CODE END TIM2_Init 0 */
@@ -43,7 +44,7 @@ void MX_TIM2_Init(void)
   htim2.Instance = TIM2;
   htim2.Init.Prescaler = 0;
   htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
-  htim2.Init.Period = 429400;
+  htim2.Init.Period = 429496;
   htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
   htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
   if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
@@ -65,6 +66,39 @@ void MX_TIM2_Init(void)
 
   /* USER CODE END TIM2_Init 2 */
 
+}
+/* TIM6 init function */
+void MX_TIM6_Init(void)
+{
+
+  /* USER CODE BEGIN TIM6_Init 0 */
+
+  /* USER CODE END TIM6_Init 0 */
+
+  TIM_MasterConfigTypeDef sMasterConfig = {0};
+
+  /* USER CODE BEGIN TIM6_Init 1 */
+
+  /* USER CODE END TIM6_Init 1 */
+  htim6.Instance = TIM6;
+  htim6.Init.Prescaler = 0;
+  htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
+  htim6.Init.Period = 1904;
+  htim6.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
+  if (HAL_TIM_Base_Init(&htim6) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
+  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
+  if (HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  /* USER CODE BEGIN TIM6_Init 2 */
+
+  /* USER CODE END TIM6_Init 2 */
+
 }
 
 void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle)
@@ -85,6 +119,17 @@ void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle)
 
   /* USER CODE END TIM2_MspInit 1 */
   }
+  else if(tim_baseHandle->Instance==TIM6)
+  {
+  /* USER CODE BEGIN TIM6_MspInit 0 */
+
+  /* USER CODE END TIM6_MspInit 0 */
+    /* TIM6 clock enable */
+    __HAL_RCC_TIM6_CLK_ENABLE();
+  /* USER CODE BEGIN TIM6_MspInit 1 */
+
+  /* USER CODE END TIM6_MspInit 1 */
+  }
 }
 
 void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* tim_baseHandle)
@@ -104,6 +149,17 @@ void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* tim_baseHandle)
 
   /* USER CODE END TIM2_MspDeInit 1 */
   }
+  else if(tim_baseHandle->Instance==TIM6)
+  {
+  /* USER CODE BEGIN TIM6_MspDeInit 0 */
+
+  /* USER CODE END TIM6_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_TIM6_CLK_DISABLE();
+  /* USER CODE BEGIN TIM6_MspDeInit 1 */
+
+  /* USER CODE END TIM6_MspDeInit 1 */
+  }
 }
 
 /* USER CODE BEGIN 1 */

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dac.c

@@ -373,7 +373,9 @@ HAL_StatusTypeDef HAL_DAC_DeInit(DAC_HandleTypeDef *hdac)
   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
   *         the configuration information for the specified DAC.
   * @retval None
+
   */
+
 __weak void HAL_DAC_MspInit(DAC_HandleTypeDef *hdac)
 {
   /* Prevent unused argument(s) compilation warning */

raw407cxx.ioc

@@ -2,6 +2,20 @@
 CAD.formats=
 CAD.pinconfig=
 CAD.provider=
+DAC.DAC_Trigger=DAC_TRIGGER_T6_TRGO
+DAC.IPParameters=DAC_Trigger
+Dma.DAC1.0.Direction=DMA_MEMORY_TO_PERIPH
+Dma.DAC1.0.FIFOMode=DMA_FIFOMODE_DISABLE
+Dma.DAC1.0.Instance=DMA1_Stream5
+Dma.DAC1.0.MemDataAlignment=DMA_MDATAALIGN_HALFWORD
+Dma.DAC1.0.MemInc=DMA_MINC_ENABLE
+Dma.DAC1.0.Mode=DMA_NORMAL
+Dma.DAC1.0.PeriphDataAlignment=DMA_PDATAALIGN_HALFWORD
+Dma.DAC1.0.PeriphInc=DMA_PINC_DISABLE
+Dma.DAC1.0.Priority=DMA_PRIORITY_LOW
+Dma.DAC1.0.RequestParameters=Instance,Direction,PeriphInc,MemInc,PeriphDataAlignment,MemDataAlignment,Mode,Priority,FIFOMode
+Dma.Request0=DAC1
+Dma.RequestsNb=1
 FREERTOS.IPParameters=Tasks01,configENABLE_FPU,configUSE_NEWLIB_REENTRANT
 FREERTOS.Tasks01=defaultTask,24,128,StartDefaultTask,Default,NULL,Dynamic,NULL,NULL
 FREERTOS.configENABLE_FPU=1
@@ -12,20 +26,23 @@ KeepUserPlacement=false
 Mcu.CPN=STM32F407VGT6
 Mcu.Family=STM32F4
 Mcu.IP0=DAC
-Mcu.IP1=FREERTOS
-Mcu.IP2=NVIC
-Mcu.IP3=RCC
-Mcu.IP4=TIM2
-Mcu.IP5=USB_DEVICE
-Mcu.IP6=USB_OTG_FS
-Mcu.IPNb=7
+Mcu.IP1=DMA
+Mcu.IP2=FREERTOS
+Mcu.IP3=NVIC
+Mcu.IP4=RCC
+Mcu.IP5=TIM2
+Mcu.IP6=TIM6
+Mcu.IP7=USB_DEVICE
+Mcu.IP8=USB_OTG_FS
+Mcu.IPNb=9
 Mcu.Name=STM32F407V(E-G)Tx
 Mcu.Package=LQFP100
 Mcu.Pin0=PC14-OSC32_IN
 Mcu.Pin1=PC15-OSC32_OUT
 Mcu.Pin10=VP_FREERTOS_VS_CMSIS_V2
 Mcu.Pin11=VP_TIM2_VS_ClockSourceINT
-Mcu.Pin12=VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS
+Mcu.Pin12=VP_TIM6_VS_ClockSourceINT
+Mcu.Pin13=VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS
 Mcu.Pin2=PH0-OSC_IN
 Mcu.Pin3=PH1-OSC_OUT
 Mcu.Pin4=PA0-WKUP
@@ -34,13 +51,14 @@ Mcu.Pin6=PA5
 Mcu.Pin7=PD12
 Mcu.Pin8=PA11
 Mcu.Pin9=PA12
-Mcu.PinsNb=13
+Mcu.PinsNb=14
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32F407VGTx
 MxCube.Version=6.8.1
 MxDb.Version=DB.6.0.81
 NVIC.BusFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false\:false
+NVIC.DMA1_Stream5_IRQn=true\:5\:0\:false\:false\:true\:true\:false\:true\:true
 NVIC.DebugMonitor_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false\:false
 NVIC.EXTI0_IRQn=true\:5\:0\:false\:false\:true\:true\:true\:true\:true
 NVIC.ForceEnableDMAVector=true
@@ -108,7 +126,7 @@ ProjectManager.StackSize=0x400
 ProjectManager.TargetToolchain=STM32CubeIDE
 ProjectManager.ToolChainLocation=
 ProjectManager.UnderRoot=true
-ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false,2-MX_GPIO_Init-GPIO-false-HAL-true,3-MX_USB_DEVICE_Init-USB_DEVICE-false-HAL-false,4-MX_DAC_Init-DAC-false-HAL-true
+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_USB_DEVICE_Init-USB_DEVICE-false-HAL-false,5-MX_DAC_Init-DAC-false-HAL-true,6-MX_TIM2_Init-TIM2-false-HAL-true,7-MX_TIM6_Init-TIM6-false-HAL-true
 RCC.48MHZClocksFreq_Value=48000000
 RCC.AHBFreq_Value=168000000
 RCC.APB1CLKDivider=RCC_HCLK_DIV4
@@ -147,6 +165,9 @@ SH.COMP_DAC2_group.0=DAC_OUT2,DAC_OUT2
 SH.COMP_DAC2_group.ConfNb=1
 SH.GPXTI0.0=GPIO_EXTI0
 SH.GPXTI0.ConfNb=1
+TIM6.IPParameters=TIM_MasterOutputTrigger,Period
+TIM6.Period=600
+TIM6.TIM_MasterOutputTrigger=TIM_TRGO_UPDATE
 USB_DEVICE.CLASS_NAME_FS=CDC
 USB_DEVICE.IPParameters=VirtualMode-CDC_FS,VirtualModeFS,CLASS_NAME_FS,PRODUCT_STRING_CDC_FS,MANUFACTURER_STRING-CDC_FS
 USB_DEVICE.MANUFACTURER_STRING-CDC_FS=Heck
@@ -159,6 +180,8 @@ VP_FREERTOS_VS_CMSIS_V2.Mode=CMSIS_V2
 VP_FREERTOS_VS_CMSIS_V2.Signal=FREERTOS_VS_CMSIS_V2
 VP_TIM2_VS_ClockSourceINT.Mode=Internal
 VP_TIM2_VS_ClockSourceINT.Signal=TIM2_VS_ClockSourceINT
+VP_TIM6_VS_ClockSourceINT.Mode=Enable_Timer
+VP_TIM6_VS_ClockSourceINT.Signal=TIM6_VS_ClockSourceINT
 VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS.Mode=CDC_FS
 VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS.Signal=USB_DEVICE_VS_USB_DEVICE_CDC_FS
 board=custom