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authorFergus Noble2011-09-15 01:20:45 -0700
committerStephen Caudle2011-10-12 22:13:02 -0400
commitcff706e3ca3823ffb388a4e87c4ef8bf925945c4 (patch)
tree677c4a469da77dff69d91b08f8cbb8b6b529b904 /examples/stm32/obldc/usart_irq/usart_irq.c
parentce7dd46aef9153c4f98a983977ce7bd2a905134d (diff)
Rename F1 examples folder.
Diffstat (limited to 'examples/stm32/obldc/usart_irq/usart_irq.c')
-rw-r--r--examples/stm32/obldc/usart_irq/usart_irq.c120
1 files changed, 0 insertions, 120 deletions
diff --git a/examples/stm32/obldc/usart_irq/usart_irq.c b/examples/stm32/obldc/usart_irq/usart_irq.c
deleted file mode 100644
index 82320c1..0000000
--- a/examples/stm32/obldc/usart_irq/usart_irq.c
+++ /dev/null
@@ -1,120 +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/rcc.h>
-#include <libopencm3/stm32/gpio.h>
-#include <libopencm3/stm32/usart.h>
-#include <libopencm3/stm32/nvic.h>
-
-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_IOPAEN);
-
- /* Enable clocks for GPIO port B (for GPIO_USART1_TX) and USART1. */
- rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
- rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
- rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN);
-}
-
-void usart_setup(void)
-{
- /* Enable the USART1 interrupt. */
- nvic_enable_irq(NVIC_USART1_IRQ);
-
- /* enable USART1 pin software remapping */
- AFIO_MAPR |= AFIO_MAPR_USART1_REMAP;
-
- /* Setup GPIO pin GPIO_USART1_RE_TX on GPIO port B for transmit. */
- gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
- GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_RE_TX);
-
- /* Setup GPIO pin GPIO_USART1_RE_RX on GPIO port B for receive. */
- gpio_set_mode(GPIOB, GPIO_MODE_INPUT,
- GPIO_CNF_INPUT_FLOAT, GPIO_USART1_RE_RX);
-
- /* Setup UART parameters. */
- usart_set_baudrate(USART1, 230400);
- 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_RX);
-
- /* Enable USART1 Receive interrupt. */
- USART_CR1(USART1) |= USART_CR1_RXNEIE;
-
- /* Finally enable the USART. */
- usart_enable(USART1);
-}
-
-void gpio_setup(void)
-{
- gpio_set(GPIOA, GPIO6 | GPIO7);
-
- /* Setup GPIO6 and 7 (in GPIO port A) for led use. */
- gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
- GPIO_CNF_OUTPUT_PUSHPULL, GPIO6 | GPIO7);
-}
-
-void usart1_isr(void)
-{
- static u8 data = 'A';
-
- /* Check if we were called because of RXNE. */
- if (((USART_CR1(USART1) & USART_CR1_RXNEIE) != 0) &&
- ((USART_SR(USART1) & USART_SR_RXNE) != 0)) {
- /* Indicate that we got data. */
- gpio_toggle(GPIOA, GPIO6);
-
- /* Retrieve the data from the peripheral. */
- data = usart_recv(USART1);
-
- /* Enable transmit interrupt so it sends back the data. */
- USART_CR1(USART1) |= USART_CR1_TXEIE;
- }
-
- /* Check if we were called because of TXE. */
- if (((USART_CR1(USART1) & USART_CR1_TXEIE) != 0) &&
- ((USART_SR(USART1) & USART_SR_TXE) != 0)) {
- /* Indicate that we are sending out data. */
- gpio_toggle(GPIOA, GPIO7);
-
- /* Put data into the transmit register. */
- usart_send(USART1, data);
-
- /* Disable the TXE interrupt as we don't need it anymore. */
- USART_CR1(USART1) &= ~USART_CR1_TXEIE;
- }
-}
-
-int main(void)
-{
- clock_setup();
- gpio_setup();
- usart_setup();
-
- /* Wait forever and do nothing. */
- while (1)
- __asm__("nop");
-
- return 0;
-}