Converting I2C to DMA

[home-hw.git] / Src / main.c

diff --git a/Src/main.c b/Src/main.c
index e2769f28a80d9b21d157df368d6bc03692020fb1..7dfa9f72a4efeaf5e904316413875310abf7896a 100644 (file)
--- a/Src/main.c
+++ b/Src/main.c
@@ -62,6 +62,7 @@ struct usb usb;
 /* Private function prototypes -----------------------------------------------*/
 void SystemClock_Config(void);
 static void MX_GPIO_Init(void);
+static void MX_DMA_Init(void);
 static void MX_I2C1_Init(void);
 static void MX_I2C2_Init(void);
 static void MX_USB_PCD_Init(void);
@@ -106,6 +107,7 @@ int main(void)
 
   /* Initialize all configured peripherals */
   MX_GPIO_Init();
+  MX_DMA_Init();
 
   // A hack to let USB host reset us
   LL_GPIO_InitTypeDef gpio;
@@ -123,7 +125,7 @@ int main(void)
   MX_USB_PCD_Init();
   MX_TIM4_Init();
   /* USER CODE BEGIN 2 */
-  display_init();
+  //display_init();
   usb_start(&usb);
   bmp_init();
 
@@ -131,10 +133,12 @@ int main(void)
   LL_TIM_EnableIT_UPDATE(TIM4);
   LL_TIM_GenerateEvent_UPDATE(TIM4);
 
+#if 0
   {
     byte buf[5] = { 0xff, 0xff, 10, 0xff, 0xff };
     display_buffer(buf);
   }
+#endif
 
   /* USER CODE END 2 */
 
@@ -144,7 +148,14 @@ int main(void)
   {
     if (rx_packet_state == 1 && !tx_packet_state)
       {
-       display_buffer(rx_packet);
+    static byte led_state;
+    if (led_state)
+      LL_GPIO_SetOutputPin(LED_GPIO_Port, LED_Pin);
+    else
+      LL_GPIO_ResetOutputPin(LED_GPIO_Port, LED_Pin);
+    led_state ^= 1;
+
+       // display_buffer(rx_packet);
        tx_packet_state = 1;
        tx_packet[0] = adjusted_temp >> 8;
        tx_packet[1] = adjusted_temp & 0xff;
@@ -160,13 +171,6 @@ int main(void)
     // debug_printf("Counter = %d\n", cnt);
     // display_counter(cnt);
 
-    static byte led_state;
-    if (led_state)
-      LL_GPIO_SetOutputPin(LED_GPIO_Port, LED_Pin);
-    else
-      LL_GPIO_ResetOutputPin(LED_GPIO_Port, LED_Pin);
-    led_state ^= 1;
-
     __WFI();
 
   /* USER CODE END WHILE */
@@ -253,10 +257,42 @@ static void MX_I2C1_Init(void)
   /* Peripheral clock enable */
   LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C1);
 
+  /* I2C1 DMA Init */
+  
+  /* I2C1_RX Init */
+  LL_DMA_SetDataTransferDirection(DMA1, LL_DMA_CHANNEL_7, LL_DMA_DIRECTION_PERIPH_TO_MEMORY);
+
+  LL_DMA_SetChannelPriorityLevel(DMA1, LL_DMA_CHANNEL_7, LL_DMA_PRIORITY_LOW);
+
+  LL_DMA_SetMode(DMA1, LL_DMA_CHANNEL_7, LL_DMA_MODE_NORMAL);
+
+  LL_DMA_SetPeriphIncMode(DMA1, LL_DMA_CHANNEL_7, LL_DMA_PERIPH_NOINCREMENT);
+
+  LL_DMA_SetMemoryIncMode(DMA1, LL_DMA_CHANNEL_7, LL_DMA_MEMORY_INCREMENT);
+
+  LL_DMA_SetPeriphSize(DMA1, LL_DMA_CHANNEL_7, LL_DMA_PDATAALIGN_BYTE);
+
+  LL_DMA_SetMemorySize(DMA1, LL_DMA_CHANNEL_7, LL_DMA_MDATAALIGN_BYTE);
+
+  /* I2C1_TX Init */
+  LL_DMA_SetDataTransferDirection(DMA1, LL_DMA_CHANNEL_6, LL_DMA_DIRECTION_MEMORY_TO_PERIPH);
+
+  LL_DMA_SetChannelPriorityLevel(DMA1, LL_DMA_CHANNEL_6, LL_DMA_PRIORITY_LOW);
+
+  LL_DMA_SetMode(DMA1, LL_DMA_CHANNEL_6, LL_DMA_MODE_NORMAL);
+
+  LL_DMA_SetPeriphIncMode(DMA1, LL_DMA_CHANNEL_6, LL_DMA_PERIPH_NOINCREMENT);
+
+  LL_DMA_SetMemoryIncMode(DMA1, LL_DMA_CHANNEL_6, LL_DMA_MEMORY_INCREMENT);
+
+  LL_DMA_SetPeriphSize(DMA1, LL_DMA_CHANNEL_6, LL_DMA_PDATAALIGN_BYTE);
+
+  LL_DMA_SetMemorySize(DMA1, LL_DMA_CHANNEL_6, LL_DMA_MDATAALIGN_BYTE);
+
     /**I2C Initialization 
     */
   I2C_InitStruct.PeripheralMode = LL_I2C_MODE_I2C;
-  I2C_InitStruct.ClockSpeed = 100000;
+  I2C_InitStruct.ClockSpeed = 400000;
   I2C_InitStruct.DutyCycle = LL_I2C_DUTYCYCLE_2;
   I2C_InitStruct.OwnAddress1 = 0;
   I2C_InitStruct.TypeAcknowledge = LL_I2C_ACK;
@@ -371,6 +407,25 @@ static void MX_USB_PCD_Init(void)
 
 }
 
+/** 
+  * Enable DMA controller clock
+  */
+static void MX_DMA_Init(void) 
+{
+  /* Init with LL driver */
+  /* DMA controller clock enable */
+  LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA1);
+
+  /* DMA interrupt init */
+  /* DMA1_Channel6_IRQn interrupt configuration */
+  NVIC_SetPriority(DMA1_Channel6_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
+  NVIC_EnableIRQ(DMA1_Channel6_IRQn);
+  /* DMA1_Channel7_IRQn interrupt configuration */
+  NVIC_SetPriority(DMA1_Channel7_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
+  NVIC_EnableIRQ(DMA1_Channel7_IRQn);
+
+}
+
 /** Configure pins as 
         * Analog 
         * Input