From b41987dc7ad99f56d05c694cfd2f69f1e63c3649 Mon Sep 17 00:00:00 2001 From: Piotr Esden-Tempski Date: Sun, 11 Mar 2012 23:55:24 -0700 Subject: Added blocking usart printf for lisa/m 2.0 --- examples/stm32/f1/lisa-m-2/usart_printf/Makefile | 25 +++++ .../stm32/f1/lisa-m-2/usart_printf/usart_printf.c | 106 +++++++++++++++++++++ 2 files changed, 131 insertions(+) create mode 100644 examples/stm32/f1/lisa-m-2/usart_printf/Makefile create mode 100644 examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c (limited to 'examples/stm32/f1') diff --git a/examples/stm32/f1/lisa-m-2/usart_printf/Makefile b/examples/stm32/f1/lisa-m-2/usart_printf/Makefile new file mode 100644 index 0000000..80ac033 --- /dev/null +++ b/examples/stm32/f1/lisa-m-2/usart_printf/Makefile @@ -0,0 +1,25 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## +## 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 . +## + +BINARY = usart_printf + +LDSCRIPT = ../lisa-m.ld + +include ../../Makefile.include + diff --git a/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c b/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c new file mode 100644 index 0000000..a66bcbc --- /dev/null +++ b/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c @@ -0,0 +1,106 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann , + * Copyright (C) 2011-2012 Piotr Esden-Tempski + * + * 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 . + */ + +#include +#include +#include +#include +#include +#include + +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; +} -- cgit v1.2.3