Added a simple input test using the button on STM32-H103 eval board.
This commit is contained in:
Piotr Esden-Tempski
parent
1cabc38c3a
commit
c208e0b3c5
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@ -24,7 +24,7 @@ Q := @
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MAKEFLAGS += --no-print-directory
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endif
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all: miniblink fancyblink usart usb_cdcacm usb_hid
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all: miniblink fancyblink usart usb_cdcacm usb_hid button
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miniblink:
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@printf " BUILD examples/stm32/stm32-h103/miniblink\n"
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@ -50,6 +50,10 @@ usb_hid:
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@printf " BUILD examples/stm32/stm32-h103/usb_hid\n"
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$(Q)$(MAKE) -C usb_hid
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button:
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@printf " BUILD examples/stm32/stm32-h103/button\n"
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$(Q)$(MAKE) -C button
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clean:
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@printf " CLEAN examples/stm32/stm32-h103/miniblink\n"
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$(Q)$(MAKE) -C miniblink clean
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@ -63,6 +67,8 @@ clean:
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$(Q)$(MAKE) -C usb_cdcacm clean
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@printf " CLEAN examples/stm32/stm32-h103/usb_hid\n"
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$(Q)$(MAKE) -C usb_hid clean
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@printf " CLEAN examples/stm32/stm32-h103/button\n"
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$(Q)$(MAKE) -C button clean
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.PHONY: miniblink fancyblink usart spi usb_cdcacm usb_hid clean
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.PHONY: miniblink fancyblink usart spi usb_cdcacm usb_hid button clean
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@ -0,0 +1,23 @@
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##
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## This file is part of the libopencm3 project.
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##
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## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
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##
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## This program is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program. If not, see <http://www.gnu.org/licenses/>.
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##
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BINARY = button
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include ../../Makefile.include
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@ -0,0 +1,80 @@
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>,
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* 2010 Piotr Esden-Tempski <piotr@esden.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/nvic.h>
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#include <libopencm3/stm32/rcc.h>
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#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/stm32/exti.h>
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u16 exti_line_state;
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/* Set STM32 to 72 MHz. */
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void clock_setup(void)
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{
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rcc_clock_setup_in_hse_8mhz_out_72mhz();
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}
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void gpio_setup(void)
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{
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/* Enable GPIOC clock. */
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rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
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/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
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gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ,
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GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
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}
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void button_setup(void)
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{
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/* Enable GPIOA clock. */
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rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
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/* Set GPIO0 (in GPIO port A) to 'input open-drain'. */
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gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
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GPIO_CNF_INPUT_PULL_UPDOWN, GPIO0);
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gpio_set(GPIOA, GPIO0);
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}
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int main(void)
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{
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int i;
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clock_setup();
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gpio_setup();
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button_setup();
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/* Blink the LED (PC12) on the board. */
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while (1) {
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gpio_toggle(GPIOC, GPIO12);
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exti_line_state = GPIOA_IDR;
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if ((exti_line_state & (1 << 0)) != 0) {
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for (i = 0; i < 800000; i++) /* Wait a bit. */
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__asm__("nop");
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}
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for (i = 0; i < 800000; i++) /* Wait a bit. */
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__asm__("nop");
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}
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return 0;
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}
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@ -0,0 +1,31 @@
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */
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/* Define memory regions. */
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MEMORY
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{
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rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
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ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
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}
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/* Include the common ld script. */
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INCLUDE libopencm3_stm32.ld
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