voilier-team-1/driver/uart.c

#include "uart.h"
#include "gpio.h"
//faire GPIO

char data1 = 0x00;
char data2 = 0x00;
char data3 = 0x00;

void MyUART_Init(MyUART_Struct_Typedef * UARTStructPtr){
	MyUART_setClockBit(UARTStructPtr->UART);
	UARTStructPtr->UART->BRR = 72000000/(UARTStructPtr->BaudRate);
	UARTStructPtr->UART->CR1 |= ((UARTStructPtr->Wlengh)<<12);
	UARTStructPtr->UART->CR1 |= (0x1<<10);

	if(UARTStructPtr->Wparity == parity_none)
		UARTStructPtr->UART->CR1 &= ~(0x1<<10);
	if(UARTStructPtr->Wparity == parity_odd)
		UARTStructPtr->UART->CR1 |= (0x1<<9);
	if(UARTStructPtr->Wparity == parity_even)
		UARTStructPtr->UART->CR1 &= ~(0x1<<9);

	if(UARTStructPtr->Wstop == stop1b)
		UARTStructPtr->UART->CR2 &= ~(0x3<<12);
	if(UARTStructPtr->Wstop == stop2b){
		UARTStructPtr->UART->CR2 &= ~(0x3<<12);
		UARTStructPtr->UART->CR2 |= (0x1<<13);
	}
	UARTStructPtr->UART->CR1 |= (USART_CR1_TE | USART_CR1_RE | USART_CR1_UE | USART_CR1_RXNEIE);

	NVIC_EnableIRQ(USART1_IRQn);
}

int MyUART_setClockBit(USART_TypeDef * UART)
{
	if (UART == USART1)
	{
		RCC->APB2ENR |= RCC_APB2ENR_USART1EN;		//72MHz
		return 0;
	}
	else if (UART == USART2)
	{
		RCC->APB1ENR |= RCC_APB1ENR_USART2EN;		//36MHz
		return 0;
	}
	else if (UART == USART3)
	{
		RCC->APB1ENR |= RCC_APB1ENR_USART3EN;		//36MHz	//Maybe return the clock base mhz ?
		return 0;
	}
	else {
		return 1;
	}
}

void USART1_IRQHandler(void)
{
  // Check if receive data register not empty
  if(USART1->SR & USART_SR_RXNE)
  {
    data1 = USART1->DR; // read received data
    // do something with received data
  }
}

void USART2_IRQHandler(void)
{
  // Check if receive data register not empty
  if(USART2->SR & USART_SR_RXNE)
  {
    data2 = USART2->DR; // read received data
    // do something with received data
  }
}

void USART3_IRQHandler(void)
{
  // Check if receive data register not empty
  if(USART3->SR & USART_SR_RXNE)
  {
    data3 = USART3->DR; // read received data
    // do something with received data
  }
}

char MyUART_Read(MyUART_Struct_Typedef * UARTStructPtr)
{
	if(UARTStructPtr->UART == USART1)
		return data1;
	else if(UARTStructPtr->UART == USART2)
		return data2;
	else if(UARTStructPtr->UART == USART3)
		return data3;
	else 
		return 0xFF;
}

/* exemple utilisation fonction :
	
	UART1.UART = USART1; // choix UART (USART1, USART2, USART3)
	UART1.BaudRate = 9600; // Vitesse de communication MAX 118200
	UART1.Wlengh = Wlengh8; // longeur du mot (Wlengh8 ,Wlengh9)
	UART1.Wparity = parity_even; // parit<69> (parity_even, parity_odd, parity_none)
	UART1.Wstop = stop1b; // nombre bit de stop (stop1b, stop2b)
	MyUART_Init(&UART1); // initialisation
*/