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Added blocking usart printf for lisa/m 2.0

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This commit is contained in:
Piotr Esden-Tempski 2012-03-11 23:55:24 -07:00
parent 22706613d9
commit b41987dc7a
2 changed files with 131 additions and 0 deletions
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25
examples/stm32/f1/lisa-m-2/usart_printf/Makefile Normal file
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##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
##
## This library is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This library is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with this library. If not, see <http://www.gnu.org/licenses/>.
##
BINARY = usart_printf
LDSCRIPT = ../lisa-m.ld
include ../../Makefile.include

106
examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
* Copyright (C) 2011-2012 Piotr Esden-Tempski <piotr@esden.net>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/f1/rcc.h>
#include <libopencm3/stm32/f1/gpio.h>
#include <libopencm3/stm32/usart.h>
#include <libopencm3/stm32/nvic.h>
#include <stdio.h>
#include <errno.h>
void clock_setup(void)
{
rcc_clock_setup_in_hse_12mhz_out_72mhz();
/* Enable GPIOA clock (for LED GPIOs). */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
/* Enable clocks for GPIO port A (for GPIO_USART2_TX) and USART2. */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN |
RCC_APB2ENR_AFIOEN);
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
}
void usart_setup(void)
{
/* Setup GPIO pin GPIO_USART2_RE_TX on GPIO port B for transmit. */
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART2_TX);
/* Setup UART parameters. */
usart_set_baudrate(USART2, 230400);
usart_set_databits(USART2, 8);
usart_set_stopbits(USART2, USART_STOPBITS_1);
usart_set_parity(USART2, USART_PARITY_NONE);
usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
usart_set_mode(USART2, USART_MODE_TX);
/* Finally enable the USART. */
usart_enable(USART2);
}
void gpio_setup(void)
{
gpio_set(GPIOA, GPIO8);
/* Setup GPIO8 (in GPIO port A) for LED use. */
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO8);
}
int _write(int file, char *ptr, int len)
{
int i;
if (file == 1) {
for (i = 0; i < len; i++)
usart_send_blocking(USART2, ptr[i]);
return i;
}
errno = EIO;
return -1;
}
int main(void)
{
int counter = 0;
float fcounter = 0.0;
double dcounter = 0.0;
clock_setup();
gpio_setup();
usart_setup();
/*
* Write Hello World, an integer, float and double all over
* again while incrementing the numbers.
*/
while (1) {
gpio_toggle(GPIOA, GPIO8);
printf("Hello World! %i %f %f\r\n", counter, fcounter,
dcounter);
counter++;
fcounter += 0.01;
dcounter += 0.01;
}
return 0;
}