nes-proj/cpu/arm/stm32l152/console.c
2015-10-09 19:40:39 +02:00

190 lines
5.6 KiB
C

/*
* Copyright (c) 2012, STMicroelectronics.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
*/
/*---------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include "console.h"
#include "stm32l1xx.h"
#include "stm32l1xx_hal_dma.h"
#include "stm32l1xx_hal_uart.h"
#include "st-lib.h"
/*---------------------------------------------------------------------------*/
extern st_lib_uart_handle_typedef st_lib_uart_handle;
/*---------------------------------------------------------------------------*/
/**
* @brief Initialises Nucleo UART port for user IO
* @retval 0
*/
int
console_init(void)
{
st_lib_uart_handle.Instance = USART2;
st_lib_uart_handle.Init.BaudRate = 115200;
st_lib_uart_handle.Init.WordLength = UART_WORDLENGTH_8B;
st_lib_uart_handle.Init.StopBits = UART_STOPBITS_1;
st_lib_uart_handle.Init.Parity = UART_PARITY_NONE;
st_lib_uart_handle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
st_lib_uart_handle.Init.Mode = UART_MODE_TX_RX;
st_lib_hal_uart_init(&st_lib_uart_handle);
return 0;
}
/*---------------------------------------------------------------------------*/
/** @brief Sends a character to serial port
* @param ch Character to send
* @retval Character sent
*/
int
uart_send_char(int ch)
{
st_lib_hal_uart_transmit(&st_lib_uart_handle, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
return ch;
}
/*---------------------------------------------------------------------------*/
/** @brief Receives a character from serial port
* @retval Character received
*/
int
uart_receive_char(void)
{
uint8_t ch;
st_lib_hal_uart_receive(&st_lib_uart_handle, &ch, 1, HAL_MAX_DELAY);
/* Echo character back to console */
st_lib_hal_uart_transmit(&st_lib_uart_handle, &ch, 1, HAL_MAX_DELAY);
/* And cope with Windows */
if(ch == '\r') {
uint8_t ret = '\n';
st_lib_hal_uart_transmit(&st_lib_uart_handle, &ret, 1, HAL_MAX_DELAY);
}
return ch;
}
/*---------------------------------------------------------------------------*/
#if defined(__IAR_SYSTEMS_ICC__)
size_t __write(int Handle, const unsigned char *Buf, size_t Bufsize);
size_t __read(int Handle, unsigned char *Buf, size_t Bufsize);
/** @brief IAR specific low level standard input
* @param handle IAR internal handle
* @param buf Buffer where to store characters read from stdin
* @param bufsize Number of characters to read
* @retval Number of characters read
*/
size_t
__read(int handle, unsigned char *buf, size_t bufsize)
{
int i;
if(handle != 0) {
return -1;
}
for(i = 0; i < bufsize; i++) {
buf[i] = uart_receive_char();
}
return bufsize;
}
/** @brief IAR specific low level standard output
* @param handle IAR internal handle
* @param buf Buffer containing characters to be written to stdout
* @param bufsize Number of characters to write
* @retval Number of characters read
*/
size_t
__write(int handle, const unsigned char *buf, size_t bufsize)
{
int i;
if(handle != 1 && handle != 2) {
return -1;
}
for(i = 0; i < bufsize; i++) {
uart_send_char(buf[i]);
}
return bufsize;
}
/*---------------------------------------------------------------------------*/
#elif defined(__CC_ARM)
/**
* @brief fputc call for standard output implementation
* @param ch Character to print
* @param f File pointer
* @retval Character printed
*/
int
fputc(int ch, FILE *f)
{
return uart_send_char(ch);
}
/** @brief fgetc call for standard input implementation
* @param f File pointer
* @retval Character acquired from standard input
*/
int
fgetc(FILE *f)
{
return uart_receive_char();
}
/*---------------------------------------------------------------------------*/
#elif defined(__GNUC__)
/** @brief putchar call for standard output implementation
* @param ch Character to print
* @retval Character printed
*/
int
__io_putchar(int ch)
{
return uart_send_char(ch);
}
/** @brief getchar call for standard input implementation
* @param None
* @retval Character acquired from standard input
*/
int
__io_getchar(void)
{
return uart_receive_char();
}
/*---------------------------------------------------------------------------*/
#else
#error "Toolchain not supported"
#endif
/*---------------------------------------------------------------------------*/