STM32F7 : correct ST HAL API call

- RCC init: unused clock was enabled without any init parameters
- RCC init: one PLL parameter was missing
- GPIO: mode was not allowed by ST HAL API

Author: jeromecoutant

targets/TARGET_STM/TARGET_STM32F7/TARGET_DISCO_F746NG/device/system_stm32f7xx.c

@@ -83,9 +83,7 @@
 
 HAL_StatusTypeDef HAL_Init(void);
 
-#if !defined  (HSE_VALUE) 
-  #define HSE_VALUE    ((uint32_t)25000000) /*!< Default value of the External oscillator in Hz */
-#endif /* HSE_VALUE */
+#define HSE_VALUE    ((uint32_t)25000000) /*!< Default value of the External oscillator in Hz */
 
 #if !defined  (HSI_VALUE)
   #define HSI_VALUE    ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/
@@ -801,7 +799,7 @@ uint8_t SetSysClock_PLL_HSI(void)
   __PWR_CLK_ENABLE();
 
   // Enable HSI oscillator and activate PLL with HSI as source
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI;
   RCC_OscInitStruct.HSIState            = RCC_HSI_ON;
   RCC_OscInitStruct.HSEState            = RCC_HSE_OFF;
   RCC_OscInitStruct.HSICalibrationValue = 16;

targets/TARGET_STM/TARGET_STM32F7/TARGET_NUCLEO_F767ZI/device/system_stm32f7xx.c

@@ -757,6 +757,7 @@ uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
   RCC_OscInitStruct.PLL.PLLN            = 432;           // VCO output clock = 432 MHz (1 MHz * 432)
   RCC_OscInitStruct.PLL.PLLP            = RCC_PLLP_DIV2; // PLLCLK = 216 MHz (432 MHz / 2)
   RCC_OscInitStruct.PLL.PLLQ            = 9;             // USB clock = 48 MHz (432 MHz / 9) --> OK for USB
+  RCC_OscInitStruct.PLL.PLLR            = 2;             // I2S clock
 
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
   {
@@ -801,7 +802,7 @@ uint8_t SetSysClock_PLL_HSI(void)
   __PWR_CLK_ENABLE();
 
   // Enable HSI oscillator and activate PLL with HSI as source
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI;
   RCC_OscInitStruct.HSIState            = RCC_HSI_ON;
   RCC_OscInitStruct.HSEState            = RCC_HSE_OFF;
   RCC_OscInitStruct.HSICalibrationValue = 16;
@@ -811,6 +812,7 @@ uint8_t SetSysClock_PLL_HSI(void)
   RCC_OscInitStruct.PLL.PLLN            = 432;           // VCO output clock = 432 MHz (1 MHz * 432)
   RCC_OscInitStruct.PLL.PLLP            = RCC_PLLP_DIV2; // PLLCLK = 216 MHz (432 MHz / 2)
   RCC_OscInitStruct.PLL.PLLQ            = 9;             // USB clock = 48 MHz (432 MHz / 9) --> OK for USB
+  RCC_OscInitStruct.PLL.PLLR            = 2;             // I2S clock
 
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
   {

targets/TARGET_STM/TARGET_STM32F7/gpio_irq_api.c

@@ -304,7 +304,7 @@ void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
                 mode = STM_MODE_IT_FALLING;
                 obj->event = EDGE_FALL;
             } else { // NONE or RISE
-                mode = STM_MODE_IT_EVT_RESET;
+                mode = STM_MODE_INPUT;
                 obj->event = EDGE_NONE;
             }
         }
@@ -313,7 +313,7 @@ void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
                 mode = STM_MODE_IT_RISING;
                 obj->event = EDGE_RISE;
             } else { // NONE or FALL
-                mode = STM_MODE_IT_EVT_RESET;
+                mode = STM_MODE_INPUT;
                 obj->event = EDGE_NONE;
             }
         }