From 80977b8053984eb4d996cc7c74bc844b972f0206 Mon Sep 17 00:00:00 2001
From: Manon Sanchez <sanch@insa-toulouse.fr>
Date: Mon, 20 Mar 2023 14:20:52 +0100
Subject: [PATCH] Added the activation of the specific clock to the GPIO port,
 during their initialization. Added comments.

---
 ProjetsKEIL/Drivers/Driver_GPIO.c | 26 +++++++++++++++++++++++++-
 ProjetsKEIL/Drivers/Driver_GPIO.h |  2 +-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/ProjetsKEIL/Drivers/Driver_GPIO.c b/ProjetsKEIL/Drivers/Driver_GPIO.c
index aefea5c..279c924 100644
--- a/ProjetsKEIL/Drivers/Driver_GPIO.c
+++ b/ProjetsKEIL/Drivers/Driver_GPIO.c
@@ -1,9 +1,29 @@
 #include "Driver_GPIO.h"
 #include "stm32f10x.h"
 #include "stdio.h"
-
+/* GPIO init function */
 void MyGPIO_Init ( MyGPIO_Struct_TypeDef * GPIOStructPtr )
 {
+	
+	/* Activation of the GPIO port specific clock */
+	 if (GPIOStructPtr->GPIO == GPIOA)
+	 {
+    RCC->APB2ENR |= RCC_APB2ENR_IOPAEN;
+   }
+	 else if (GPIOStructPtr->GPIO == GPIOB)
+	 {
+		 RCC->APB2ENR |= RCC_APB2ENR_IOPBEN;
+   }
+	 else if (GPIOStructPtr->GPIO == GPIOC)
+	 {
+		 RCC->APB2ENR |= RCC_APB2ENR_IOPCEN;
+   }
+	 else if (GPIOStructPtr->GPIO == GPIOD)
+	 {
+	 RCC->APB2ENR |= RCC_APB2ENR_IOPDEN;
+	 }
+  
+	
 	/* Reset, and then configuration writing of the selected GPIO Pin */	
 	if(GPIOStructPtr->GPIO_Pin <= 8)
 	{
@@ -24,18 +44,22 @@ void MyGPIO_Init ( MyGPIO_Struct_TypeDef * GPIOStructPtr )
 		GPIOStructPtr->GPIO->ODR |= 0x1<<(GPIOStructPtr->GPIO_Pin);
 	}
 }
+/* Read of the state of the GPIO */
 int MyGPIO_Read ( GPIO_TypeDef * GPIO , char GPIO_Pin )
 {
 	return ((GPIO->ODR & (0x1<<GPIO_Pin))>>GPIO_Pin);
 }
+/* Set the state of the GPIO */
 void MyGPIO_Set (GPIO_TypeDef * GPIO , char GPIO_Pin)
 {
 	GPIO->ODR &= 0x1<<GPIO_Pin;
 }
+/* Reset the state of the GPIO */
 void MyGPIO_Reset (GPIO_TypeDef * GPIO , char GPIO_Pin)
 {
 	GPIO->ODR |= ~(0x1<<GPIO_Pin);
 }
+/* Toogle the state of the GPIO */
 void MyGPIO_Toggle ( GPIO_TypeDef * GPIO , char GPIO_Pin )
 {
 	if(MyGPIO_Read(GPIO, GPIO_Pin))
diff --git a/ProjetsKEIL/Drivers/Driver_GPIO.h b/ProjetsKEIL/Drivers/Driver_GPIO.h
index 0b7b325..60fdc9c 100644
--- a/ProjetsKEIL/Drivers/Driver_GPIO.h
+++ b/ProjetsKEIL/Drivers/Driver_GPIO.h
@@ -18,7 +18,7 @@ typedef struct
 #define AltOut_OD 0x1110
 
 void MyGPIO_Init ( MyGPIO_Struct_TypeDef * GPIOStructPtr ) ;
-int MyGPIO_Read ( GPIO_TypeDef * GPIO , char GPIO_Pin ) ; // re nv oie 0 ou a u t re chose d i f f e r e n t de 0
+int MyGPIO_Read ( GPIO_TypeDef * GPIO , char GPIO_Pin ) ; // renvoie 0 ou autre chose different de 0
 void MyGPIO_Set ( GPIO_TypeDef * GPIO , char GPIO_Pin ) ;
 void MyGPIO_Reset ( GPIO_TypeDef * GPIO , char GPIO_Pin ) ;
 void MyGPIO_Toggle ( GPIO_TypeDef * GPIO , char GPIO_Pin ) ;