/* * This file is part of the libopencm3 project. * * Copyright (C) 2010 Thomas Otto * * 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 #include #include "./dogm128.h" void gpio_setup(void) { /* Enable GPIOB clock. */ rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN); /* Set GPIO6/7 (in GPIO port B) to 'output push-pull' for the LEDs. */ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO6); gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO7); /* A0 of DOGM128 */ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO14); /* Reset of DOGM128 */ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO10); /* DOGM128/SPI2 clock and MOSI and NSS(CS1) */ gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO12); gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO13); gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO15); } void spi_setup(void) { /* The DOGM128 display is connected to SPI2, so initialise it. */ rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_SPI2EN); spi_set_unidirectional_mode(DOGM128_SPI); /* We want to send only. */ spi_disable_crc(DOGM128_SPI); /* No CRC for this slave. */ spi_set_dff_8bit(DOGM128_SPI); /* 8-bit dataword-length */ spi_set_full_duplex_mode(DOGM128_SPI); /* Not receive-only */ /* We want to handle the CS signal in software. */ spi_enable_software_slave_management(DOGM128_SPI); spi_set_nss_high(DOGM128_SPI); /* PCLOCK/256 as clock. */ spi_set_baudrate_prescaler(DOGM128_SPI, SPI_CR1_BR_FPCLK_DIV_256); /* We want to control everything and generate the clock -> master. */ spi_set_master_mode(DOGM128_SPI); spi_set_clock_polarity_1(DOGM128_SPI); /* SCK idle state high. */ /* Bit is taken on the second (rising edge) of SCK. */ spi_set_clock_phase_1(DOGM128_SPI); spi_enable_ss_output(DOGM128_SPI); spi_enable(DOGM128_SPI); } int main(void) { rcc_clock_setup_in_hse_16mhz_out_72mhz(); gpio_setup(); spi_setup(); gpio_clear(GPIOB, GPIO7); /* LED1 on */ gpio_set(GPIOB, GPIO6); /* LED2 off */ dogm128_init(); dogm128_clear(); dogm128_set_cursor(0, 56); dogm128_print_string("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); dogm128_set_cursor(0, 48); dogm128_print_string("abcdefghijklmnopqrstuvwxyz"); dogm128_set_cursor(0, 40); dogm128_print_string(" !#$%&'()*+,-./0123456789"); dogm128_set_cursor(0, 32); dogm128_print_string(":;<=>?@[\\]^_`{|}~"); dogm128_set_dot(10, 10); dogm128_set_dot(20, 10); dogm128_set_dot(30, 10); dogm128_set_dot(40, 10); dogm128_set_dot(50, 10); dogm128_update_display(); gpio_set(GPIOB, GPIO7); /* LED1 off */ while (1); /* Halt. */ return 0; }