#include "Driver_UART.h"
#include "Driver_GPIO.h"


char received_data1, received_data2, received_data3;

void UART_init(MyUART_Struct_Typedef * UART)
	{
	if(UART->UART ==USART1)
		RCC->APB2ENR |= RCC_APB2ENR_USART1EN;
	else if(UART->UART ==USART2)
		RCC->APB1ENR |= RCC_APB1ENR_USART2EN;
	else if(UART->UART ==USART3)
		RCC->APB1ENR |= RCC_APB1ENR_USART3EN;
	
	
		RCC->APB2ENR |= RCC_APB2ENR_USART1EN; // Validation horloge USART1
		USART1->CR1 |= USART_CR1_UE;					// Activer l'USART
		USART1->CR1 &= ~USART_CR1_M;					// Choisir la taille 8bits de donnée
		USART1->CR2 |= USART_CR2_STOP;				// 1 seul bit de stop
		//USART1->BRR |= 468 << 4; // Fixe le baud rate à 9600bps partie entière
    //USART1->BRR |= 75; // Fixe le baud rate à 9600bps partie fractionnaire
		UART->UART->BRR = 72000000/(UART->baudrate);
		USART1->CR1 |= USART_CR1_TE;						// Autoriser la transmission
		USART1->CR1 |= USART_CR1_RE;         // Activer la réception
		USART1->CR1 |= USART_CR1_TCIE;	// Activer l'interruption de transmission
		USART1->CR1 |= USART_CR1_RXNEIE;     // Activer l'interruption de réception
	}

void UART_send(char data)
	{
		while(!(USART1->SR & USART_SR_TXE) | !(USART2->SR & USART_SR_TXE)){}	//Attendre l'autorisation de transmission
		USART1->DR |= data;
		while(!(USART1->SR & USART_SR_TC) | !(USART2->SR & USART_SR_TC)){}	//Attendre la fin de transmission
	}
	
char UART_read(char data, MyUART_Struct_Typedef * UART)
	{
		if(UART->UART == USART1)
			return received_data1;
		else if (UART->UART == USART2)
			return received_data2;
		else if (UART->UART == USART3)
			return received_data3;
		else
			return 0;
	}
	
	
void USART1_IRQHandler(void)
{
    if (USART1->SR & USART_SR_RXNE) // si une donnée a été reçue
    {
        received_data1 = USART1->DR; // lire la donnée reçue
    }
    
    if (USART1->SR & USART_SR_TC) // si la transmission est terminée
    {
        USART1->SR &= ~USART_SR_TC; // effacer le bit de transmission terminée
    }
}

void USART2_IRQHandler(void)
{
    if (USART2->SR & USART_SR_RXNE) // si une donnée a été reçue
    {
        received_data2 = USART2->DR; // lire la donnée reçue
    }
    
    if (USART2->SR & USART_SR_TC) // si la transmission est terminée
    {
        USART2->SR &= ~USART_SR_TC; // effacer le bit de transmission terminée
    }
}

void USART3_IRQHandler(void)
{
    if (USART3->SR & USART_SR_RXNE) // si une donnée a été reçue
    {
        received_data3 = USART3->DR; // lire la donnée reçue
    }
    
    if (USART3->SR & USART_SR_TC) // si la transmission est terminée
    {
        USART3->SR &= ~USART_SR_TC; // effacer le bit de transmission terminée
    }
}


void UART_interruption (MyUART_Struct_Typedef * UART)
{
	UART->UART->CR1 |= USART_CR1_RXNEIE;
	
	if (UART->UART==USART1)
	{
		NVIC->ISER[1] |= (1<<(USART1_IRQn-32));
	}
	if (UART->UART==USART2)
	{
		NVIC->ISER[1] |= (1<<(USART2_IRQn-32));
	}
	if (UART->UART==USART3)
	{
		NVIC->ISER[1] |= (1<<(USART3_IRQn-32));
	}
}

void UART_InitGPIO(MyUART_Struct_Typedef * UART)
{
	if(UART->UART == USART1)
	{
		MyUART_Struct_Typedef UART1 = {USART1,9600};
		MyGPIO_Struct_TypeDef PA9 = {GPIOA,9,AltOut_Ppull};	
		MyGPIO_Struct_TypeDef PA10 = {GPIOA,10,In_PullUp};
		MyGPIO_Init (&PA9);
		MyGPIO_Init (&PA10);
		UART_init(&UART1);
	}
	else if(UART->UART == USART2) {
		MyUART_Struct_Typedef UART2 = {USART2,9600};
		MyGPIO_Struct_TypeDef PA2 = {GPIOA,2,AltOut_Ppull};	
		MyGPIO_Struct_TypeDef PA3 = {GPIOA,3,In_Floating};
		MyGPIO_Init (&PA2);
		MyGPIO_Init (&PA3);
		UART_init(&UART2);
	}
	else if(UART->UART == USART3) {
		MyUART_Struct_Typedef UART3 = {USART3,9600};
		MyGPIO_Struct_TypeDef PA10 = {GPIOA,10,AltOut_Ppull};	
		MyGPIO_Struct_TypeDef PA11 = {GPIOA,11,In_PullUp};
		MyGPIO_Init (&PA10);
		MyGPIO_Init (&PA11);
		UART_init(&UART3);
	}
	else {
		return;
	}

}