/* * This file is part of the libopenstm32 project. * * Copyright (C) 2010 Uwe Hermann * * 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 void clock_setup(void) { /* Select HSI as SYSCLK source. */ rcc_set_sysclk_source(SW_SYSCLKSEL_HSICLK); /* Set the PLL multiplication factor to 9. */ rcc_set_pll_multiplication_factor(PLLMUL_PLL_CLK_MUL9); /* Select HSI/2 as PLL source. */ rcc_set_pll_source(PLLSRC_HSI_CLK_DIV2); rcc_set_pllxtpre(PLLXTPRE_HSE_CLK_DIV2); /* Enable PLL oscillator and wait for it to stabilize. */ rcc_osc_on(PLL); rcc_wait_for_osc_ready(PLL); /* Select PLL as SYSCLK source. */ rcc_set_sysclk_source(SW_SYSCLKSEL_PLLCLK); } void spi_setup(void) { /* TODO */ } void gpio_setup(void) { /* TODO */ } int main(void) { clock_setup(); gpio_setup(); spi_setup(); while (1) { spi_write(SPI1, 0xaa); spi_write(SPI1, 0x55); } return 0; }