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Diffstat (limited to 'examples/stm32f1/stm32-discovery/usart/usart.c')
-rw-r--r--examples/stm32f1/stm32-discovery/usart/usart.c87
1 files changed, 0 insertions, 87 deletions
diff --git a/examples/stm32f1/stm32-discovery/usart/usart.c b/examples/stm32f1/stm32-discovery/usart/usart.c
deleted file mode 100644
index 942805b..0000000
--- a/examples/stm32f1/stm32-discovery/usart/usart.c
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * This file is part of the libopencm3 project.
- *
- * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
- *
- * 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 <http://www.gnu.org/licenses/>.
- */
-
-#include <libopencm3/stm32/f1/rcc.h>
-#include <libopencm3/stm32/f1/gpio.h>
-#include <libopencm3/stm32/usart.h>
-
-void clock_setup(void)
-{
- rcc_clock_setup_in_hse_8mhz_out_24mhz();
-
- /* Enable GPIOC clock. */
- 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_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN);
-}
-
-void usart_setup(void)
-{
- /* Setup GPIO pin GPIO_USART1_TX/GPIO9 on GPIO port A for transmit. */
- gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
- GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
-
- /* Setup UART parameters. */
- // usart_set_baudrate(USART1, 38400);
- /* TODO usart_set_baudrate() doesn't support 24MHz clock (yet). */
- /* This is the equivalent: */
- USART_BRR(USART1) = (u16)((24000000 << 4) / (38400 * 16));
-
- usart_set_databits(USART1, 8);
- usart_set_stopbits(USART1, USART_STOPBITS_1);
- usart_set_mode(USART1, USART_MODE_TX);
- usart_set_parity(USART1, USART_PARITY_NONE);
- usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
-
- /* Finally enable the USART. */
- usart_enable(USART1);
-}
-
-void gpio_setup(void)
-{
- /* Set GPIO9 (in GPIO port C) to 'output push-pull'. [LED] */
- gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
- GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
-}
-
-int main(void)
-{
- int i, j = 0, c = 0;
-
- clock_setup();
- gpio_setup();
- usart_setup();
-
- /* Blink the LED (PC9) on the board with every transmitted byte. */
- while (1) {
- gpio_toggle(GPIOC, GPIO9); /* LED on/off */
- usart_send_blocking(USART1, c + '0'); /* USART1: Send byte. */
- c = (c == 9) ? 0 : c + 1; /* Increment c. */
- if ((j++ % 80) == 0) { /* Newline after line full. */
- usart_send_blocking(USART1, '\r');
- usart_send_blocking(USART1, '\n');
- }
- for (i = 0; i < 800000; i++) /* Wait a bit. */
- __asm__("NOP");
- }
-
- return 0;
-}