/* * 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; }