serial_tracer.c

/*
 * serial_tracer.c
 *
 *  Created on: 12. 3. 2013
 *      Author: honza
 */
#include <string.h>
#include "stm32f10x.h"
#include "serial_tracer.h"

void tracer_init(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA |
			RCC_APB2Periph_AFIO, ENABLE);

	USART_InitStructure.USART_BaudRate = 115200;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	USART_Init(USART1, &USART_InitStructure);
	USART_Cmd(USART1, ENABLE);

	tracer_putchar('\r');
}

void tracer_putchar(const char ch)
{
	USART_SendData(USART1, (uint8_t) ch);

	while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
	{}
}

void tracer_puts(const char *str)
{
	int i;
	for (i = 0; i < strnlen(str, 128); i++)
		tracer_putchar(str[i]);
}