From cff706e3ca3823ffb388a4e87c4ef8bf925945c4 Mon Sep 17 00:00:00 2001 From: Fergus Noble Date: Thu, 15 Sep 2011 01:20:45 -0700 Subject: Rename F1 examples folder. --- examples/stm32f1/stm32-discovery/button/Makefile | 23 +++++++ examples/stm32f1/stm32-discovery/button/README | 8 +++ examples/stm32f1/stm32-discovery/button/button.c | 76 +++++++++++++++++++++++ examples/stm32f1/stm32-discovery/button/button.ld | 31 +++++++++ 4 files changed, 138 insertions(+) create mode 100644 examples/stm32f1/stm32-discovery/button/Makefile create mode 100644 examples/stm32f1/stm32-discovery/button/README create mode 100644 examples/stm32f1/stm32-discovery/button/button.c create mode 100644 examples/stm32f1/stm32-discovery/button/button.ld (limited to 'examples/stm32f1/stm32-discovery/button') diff --git a/examples/stm32f1/stm32-discovery/button/Makefile b/examples/stm32f1/stm32-discovery/button/Makefile new file mode 100644 index 0000000..96731c2 --- /dev/null +++ b/examples/stm32f1/stm32-discovery/button/Makefile @@ -0,0 +1,23 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 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 . +## + +BINARY = button + +include ../../Makefile.include + diff --git a/examples/stm32f1/stm32-discovery/button/README b/examples/stm32f1/stm32-discovery/button/README new file mode 100644 index 0000000..38bc1ea --- /dev/null +++ b/examples/stm32f1/stm32-discovery/button/README @@ -0,0 +1,8 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This example blinks the green LED on the ST STM32VLDISCOVERY eval board. + +When you press the 'USER' button, the blinking is slower. + diff --git a/examples/stm32f1/stm32-discovery/button/button.c b/examples/stm32f1/stm32-discovery/button/button.c new file mode 100644 index 0000000..b84f074 --- /dev/null +++ b/examples/stm32f1/stm32-discovery/button/button.c @@ -0,0 +1,76 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann , + * Copyright (C) 2010 Piotr Esden-Tempski + * + * 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 +#include + +u16 exti_line_state; + +/* Set STM32 to 24 MHz. */ +void clock_setup(void) +{ + rcc_clock_setup_in_hse_8mhz_out_24mhz(); +} + +void gpio_setup(void) +{ + /* Enable GPIOC clock. */ + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN); + + /* Set GPIO9 (in GPIO port C) to 'output push-pull'. */ + gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, + GPIO_CNF_OUTPUT_PUSHPULL, GPIO9); +} + +void button_setup(void) +{ + /* Enable GPIOA clock. */ + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN); + + /* Set GPIO0 (in GPIO port A) to 'input open-drain'. */ + gpio_set_mode(GPIOA, GPIO_MODE_INPUT, + GPIO_CNF_INPUT_FLOAT, GPIO0); +} + +int main(void) +{ + int i; + + clock_setup(); + gpio_setup(); + button_setup(); + + /* Blink the LED (PC9) on the board. */ + while (1) { + gpio_toggle(GPIOC, GPIO9); + + /* Upon button press, blink more slowly. */ + exti_line_state = GPIOA_IDR; + if ((exti_line_state & (1 << 0)) != 0) { + for (i = 0; i < 800000; i++) /* Wait a bit. */ + __asm__("nop"); + } + + for (i = 0; i < 800000; i++) /* Wait a bit. */ + __asm__("nop"); + } + + return 0; +} diff --git a/examples/stm32f1/stm32-discovery/button/button.ld b/examples/stm32f1/stm32-discovery/button/button.ld new file mode 100644 index 0000000..b03f90f --- /dev/null +++ b/examples/stm32f1/stm32-discovery/button/button.ld @@ -0,0 +1,31 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 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 . + */ + +/* Linker script for ST STM32VLDISCOVERY (STM32F100RB, 128K flash, 8K RAM). */ + +/* Define memory regions. */ +MEMORY +{ + rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K + ram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K +} + +/* Include the common ld script. */ +INCLUDE libopencm3_stm32.ld + -- cgit v1.2.3