From 16a481034ff86869d8e4548dfb4b7bf8df2c6f26 Mon Sep 17 00:00:00 2001 From: Henry Hallam Date: Thu, 22 Sep 2011 16:04:42 -0700 Subject: SPI test (untested) --- examples/stm32f2/jobygps/spi_test/spi_test.c | 122 +++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 examples/stm32f2/jobygps/spi_test/spi_test.c (limited to 'examples/stm32f2/jobygps/spi_test/spi_test.c') diff --git a/examples/stm32f2/jobygps/spi_test/spi_test.c b/examples/stm32f2/jobygps/spi_test/spi_test.c new file mode 100644 index 0000000..2145165 --- /dev/null +++ b/examples/stm32f2/jobygps/spi_test/spi_test.c @@ -0,0 +1,122 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann , + * 2011 Piotr Esden-Tempski + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include + +#include +#include + +void clock_setup(void) +{ + //rcc_clock_setup_in_hse_8mhz_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_USART1_TX) and USART1. */ + //rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN | +// RCC_APB2ENR_AFIOEN | +// RCC_APB2ENR_USART1EN); + RCC_APB1ENR |= RCC_APB1ENR_SPI2EN; + RCC_APB2ENR |= RCC_APB2ENR_USART1EN; + RCC_AHB1ENR |= RCC_AHB1ENR_GPIOCEN | RCC_AHB1ENR_GPIOAEN; // PORT B not enabled... + +} + +void spi_setup(void) +{ + gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO12 | GPIO13 | GPIO14 | GPIO15); + + /* Setup SPI parameters. */ + spi_init_master(SPI2, SPI_CR1_BAUDRATE_FPCLK_DIV_256, SPI_CR1_CPOL, SPI_CR1_CPHA, SPI_CR1_DFF_8BIT, SPI_CR1_MSBFIRST); + + /* Finally enable the SPI. */ + spi_enable(SPI2); +} + +void usart_setup(void) +{ + gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO9); + //GPIO_MODER(GPIOA) |= GPIO_MODE(9, GPIO_MODE_AF); + //gpio_set_af(GPIOA, GPIO_AF7, GPIO9|GPIO10); + + /* Setup UART parameters. */ + usart_set_baudrate(USART1, 9600, 16000000); + usart_set_databits(USART1, 8); + usart_set_stopbits(USART1, USART_STOPBITS_1); + usart_set_parity(USART1, USART_PARITY_NONE); + usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE); + usart_set_mode(USART1, USART_MODE_TX); + + /* Finally enable the USART. */ + usart_enable(USART1); +} + +void gpio_setup(void) +{ + gpio_set(GPIOC, GPIO3); + + /* Setup GPIO6 and 7 (in GPIO port A) for led use. */ + gpio_mode_setup(GPIOC, GPIO_MODE_OUTPUT, + GPIO_MODE_OUTPUT, GPIO3); +} + +int _write (int file, char *ptr, int len) +{ + int i; + + if (file == 1) { + for (i = 0; i < len; i++){ + usart_send_blocking(USART1, ptr[i]); + } + + return i; + } + + errno = EIO; + return -1; +} + +int main(void) +{ + int counter = 0; + + clock_setup(); + gpio_setup(); + usart_setup(); + spi_setup(); + + /* + * Write Hello World an integer, float and double all over + * again while incrementing the numbers. + */ + while (1) { + gpio_toggle(GPIOC, GPIO3); + printf("Hello World! %i\r\n", counter); + counter++; + spi_send(SPI2,(u8)counter); + } + + return 0; +} -- cgit v1.2.3