Configure YMF262 parallel bus GPIO and fix PLL settings

Add D0-D7 data bus (GPIOC), control signals _WR/_RD/_CS/_IC and
  address lines A0/A1 (GPIOF), and _IRQ input for the YMF262 interface.
  Fix PLL parameters (PLLM=8, PLLN=432, PLLQ=12) for correct 216 MHz
  operation from the 8 MHz HSE, and switch USB 48 MHz clock to PLLSAI.

Core/Src/main.c

@@ -68,6 +68,50 @@ static void MX_USB_OTG_FS_PCD_Init(void);
   * @brief  The application entry point.
   * @retval int
   */
+int main(void)
+{
+
+  /* USER CODE BEGIN 1 */
+
+  /* USER CODE END 1 */
+
+  /* MPU Configuration--------------------------------------------------------*/
+  MPU_Config();
+
+  /* MCU Configuration--------------------------------------------------------*/
+
+  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
+  HAL_Init();
+
+  /* USER CODE BEGIN Init */
+
+  /* USER CODE END Init */
+
+  /* Configure the system clock */
+  SystemClock_Config();
+
+  /* USER CODE BEGIN SysInit */
+
+  /* USER CODE END SysInit */
+
+  /* Initialize all configured peripherals */
+  MX_GPIO_Init();
+  MX_USART3_UART_Init();
+  MX_USB_OTG_FS_PCD_Init();
+  /* USER CODE BEGIN 2 */
+
+  /* USER CODE END 2 */
+
+  /* Infinite loop */
+  /* USER CODE BEGIN WHILE */
+  while (1)
+  {
+    /* USER CODE END WHILE */
+
+    /* USER CODE BEGIN 3 */
+  }
+  /* USER CODE END 3 */
+}
 
 /**
   * @brief System Clock Configuration
@@ -94,10 +138,10 @@ void SystemClock_Config(void)
   RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
-  RCC_OscInitStruct.PLL.PLLM = 4;
-  RCC_OscInitStruct.PLL.PLLN = 216;
+  RCC_OscInitStruct.PLL.PLLM = 8;
+  RCC_OscInitStruct.PLL.PLLN = 432;
   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
-  RCC_OscInitStruct.PLL.PLLQ = 9;
+  RCC_OscInitStruct.PLL.PLLQ = 12;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
   {
     Error_Handler();
@@ -210,6 +254,7 @@ static void MX_GPIO_Init(void)
 
   /* GPIO Ports Clock Enable */
   __HAL_RCC_GPIOC_CLK_ENABLE();
+  __HAL_RCC_GPIOF_CLK_ENABLE();
   __HAL_RCC_GPIOH_CLK_ENABLE();
   __HAL_RCC_GPIOB_CLK_ENABLE();
   __HAL_RCC_GPIOD_CLK_ENABLE();
@@ -217,7 +262,15 @@ static void MX_GPIO_Init(void)
   __HAL_RCC_GPIOA_CLK_ENABLE();
 
   /*Configure GPIO pin Output Level */
-  HAL_GPIO_WritePin(GPIOB, LD1_Pin|LD3_Pin|LD2_Pin, GPIO_PIN_RESET);
+  HAL_GPIO_WritePin(GPIOF, _WR_Pin|_RD_Pin|_CS_Pin|_IC_Pin
+                          |A1_Pin|A0_Pin, GPIO_PIN_SET);
+
+  /*Configure GPIO pin Output Level */
+  HAL_GPIO_WritePin(GPIOC, D0_Pin|D1_Pin|D2_Pin|D3_Pin
+                          |D4_Pin|D5_Pin|D6_Pin|D7_Pin, GPIO_PIN_SET);
+
+  /*Configure GPIO pin Output Level */
+  HAL_GPIO_WritePin(GPIOB, LD3_Pin|LD2_Pin, GPIO_PIN_RESET);
 
   /*Configure GPIO pin Output Level */
   HAL_GPIO_WritePin(USB_PowerSwitchOn_GPIO_Port, USB_PowerSwitchOn_Pin, GPIO_PIN_RESET);
@@ -228,8 +281,32 @@ static void MX_GPIO_Init(void)
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   HAL_GPIO_Init(USER_Btn_GPIO_Port, &GPIO_InitStruct);
 
-  /*Configure GPIO pins : LD1_Pin LD3_Pin LD2_Pin */
-  GPIO_InitStruct.Pin = LD1_Pin|LD3_Pin|LD2_Pin;
+  /*Configure GPIO pin : _IRQ_Pin */
+  GPIO_InitStruct.Pin = _IRQ_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+  GPIO_InitStruct.Pull = GPIO_PULLUP;
+  HAL_GPIO_Init(_IRQ_GPIO_Port, &GPIO_InitStruct);
+
+  /*Configure GPIO pins : _WR_Pin _RD_Pin _CS_Pin _IC_Pin
+                           A1_Pin A0_Pin */
+  GPIO_InitStruct.Pin = _WR_Pin|_RD_Pin|_CS_Pin|_IC_Pin
+                          |A1_Pin|A0_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
+
+  /*Configure GPIO pins : D0_Pin D1_Pin D2_Pin D3_Pin
+                           D4_Pin D5_Pin D6_Pin D7_Pin */
+  GPIO_InitStruct.Pin = D0_Pin|D1_Pin|D2_Pin|D3_Pin
+                          |D4_Pin|D5_Pin|D6_Pin|D7_Pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
+  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
+
+  /*Configure GPIO pins : LD3_Pin LD2_Pin */
+  GPIO_InitStruct.Pin = LD3_Pin|LD2_Pin;
   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
@@ -261,26 +338,10 @@ static void MX_GPIO_Init(void)
 
 void MPU_Config(void)
 {
-  MPU_Region_InitTypeDef MPU_InitStruct = {0};
 
   /* Disables the MPU */
   HAL_MPU_Disable();
 
-  /** Initializes and configures the Region and the memory to be protected
-  */
-  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
-  MPU_InitStruct.Number = MPU_REGION_NUMBER0;
-  MPU_InitStruct.BaseAddress = 0x0;
-  MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
-  MPU_InitStruct.SubRegionDisable = 0x87;
-  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
-  MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
-  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
-  MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
-  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
-  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
-
-  HAL_MPU_ConfigRegion(&MPU_InitStruct);
   /* Enables the MPU */
   HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
 

Core/Src/stm32f7xx_hal_msp.c

@@ -172,7 +172,11 @@ void HAL_PCD_MspInit(PCD_HandleTypeDef* hpcd)
   /** Initializes the peripherals clock
   */
     PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CLK48;
-    PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48SOURCE_PLL;
+    PeriphClkInitStruct.PLLSAI.PLLSAIN = 192;
+    PeriphClkInitStruct.PLLSAI.PLLSAIQ = 2;
+    PeriphClkInitStruct.PLLSAI.PLLSAIP = RCC_PLLSAIP_DIV4;
+    PeriphClkInitStruct.PLLSAIDivQ = 1;
+    PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48SOURCE_PLLSAIP;
     if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
     {
       Error_Handler();