/*
 * uart.c
 *
 *  Created on: Dec 15, 2014
 *      Author: Mario Huettel
 */
//USART2
//PA2 => TX
//PA3 => RX
//Alternate Function 7
#include <uart/uart.h>
#include <stm32f4xx.h>

void initUART() {
	__DSB();
	RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
	RCC->APB1ENR |= RCC_APB1ENR_USART2EN;
	__DSB();

	GPIOA->MODER |= (1<<5);
	GPIOA->AFR[0] |= (7<<8); //Enable Clock
	GPIOA->MODER |= (1<<5);
	GPIOA->AFR[0] |= (7<<8);
	asm("nop");
	asm("nop");
	asm("nop");
	USART2->BRR = 0x1117; //Baudrate  273.4375=>0x1117 9600baud bei 42MHz Periph
	USART2->CR1 = USART_CR1_UE | USART_CR1_TE;

}
void sendChar(char c) {
	while(!(USART2->SR & USART_SR_TXE));
	USART2->DR = c;

}
void sendString(char* s, int count) {
	int i = 0;
	for (i = 0; i < count; i++,s++)
	{
		if (!(*s))
			break;
		sendChar(*s);
	}
}