From 59df80398b8fb7b6837ea885c351046ff2818413 Mon Sep 17 00:00:00 2001 From: Stephen Caudle Date: Mon, 31 Oct 2011 00:42:26 -0400 Subject: Add miniblink example for STM32F4 discovery board --- .../stm32/f4/stm32-discovery/miniblink/Makefile | 23 +++++++ examples/stm32/f4/stm32-discovery/miniblink/README | 9 +++ .../stm32/f4/stm32-discovery/miniblink/miniblink.c | 73 ++++++++++++++++++++++ .../f4/stm32-discovery/miniblink/miniblink.ld | 32 ++++++++++ 4 files changed, 137 insertions(+) create mode 100644 examples/stm32/f4/stm32-discovery/miniblink/Makefile create mode 100644 examples/stm32/f4/stm32-discovery/miniblink/README create mode 100644 examples/stm32/f4/stm32-discovery/miniblink/miniblink.c create mode 100644 examples/stm32/f4/stm32-discovery/miniblink/miniblink.ld (limited to 'examples/stm32/f4/stm32-discovery') diff --git a/examples/stm32/f4/stm32-discovery/miniblink/Makefile b/examples/stm32/f4/stm32-discovery/miniblink/Makefile new file mode 100644 index 0000000..24a478b --- /dev/null +++ b/examples/stm32/f4/stm32-discovery/miniblink/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 = miniblink + +include ../../Makefile.include + diff --git a/examples/stm32/f4/stm32-discovery/miniblink/README b/examples/stm32/f4/stm32-discovery/miniblink/README new file mode 100644 index 0000000..cffce60 --- /dev/null +++ b/examples/stm32/f4/stm32-discovery/miniblink/README @@ -0,0 +1,9 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This is the smallest-possible example program using libopencm3. + +It's intended for the ST STM32VLDISCOVERY eval board. It should blink +the blue LED on the board. + diff --git a/examples/stm32/f4/stm32-discovery/miniblink/miniblink.c b/examples/stm32/f4/stm32-discovery/miniblink/miniblink.c new file mode 100644 index 0000000..1bbcbe2 --- /dev/null +++ b/examples/stm32/f4/stm32-discovery/miniblink/miniblink.c @@ -0,0 +1,73 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Stephen Caudle + * + * 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 + +void gpio_setup(void) +{ + /* Enable GPIOD clock. */ + /* Manually: */ + // RCC_AHB1ENR |= RCC_AHB1ENR_IOPDEN; + /* Using API functions: */ + rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN); + + /* Set GPIO12 (in GPIO port D) to 'output push-pull'. */ + /* Manually: */ + // GPIOD_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((8 - 8) * 4) + 2)); + // GPIOD_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((8 - 8) * 4)); + /* Using API functions: */ + gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, + GPIO_PUPD_NONE, + GPIO12); +} + +int main(void) +{ + int i; + + gpio_setup(); + + /* Blink the LED (PC8) on the board. */ + while (1) { + /* Manually: */ + // GPIOD_BSRR = GPIO12; /* LED off */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + // GPIOD_BRR = GPIO12; /* LED on */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + + /* Using API functions gpio_set()/gpio_clear(): */ + // gpio_set(GPIOD, GPIO12); /* LED off */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + // gpio_clear(GPIOD, GPIO12); /* LED on */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + + /* Using API function gpio_toggle(): */ + gpio_toggle(GPIOD, GPIO12); /* LED on/off */ + for (i = 0; i < 1000000; i++) /* Wait a bit. */ + __asm__("nop"); + } + + return 0; +} diff --git a/examples/stm32/f4/stm32-discovery/miniblink/miniblink.ld b/examples/stm32/f4/stm32-discovery/miniblink/miniblink.ld new file mode 100644 index 0000000..1cb43c6 --- /dev/null +++ b/examples/stm32/f4/stm32-discovery/miniblink/miniblink.ld @@ -0,0 +1,32 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Stephen Caudle + * + * 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 STM32F4DISCOVERY (STM32F407VG, 1024K flash, 128K RAM). */ + +/* Define memory regions. */ +MEMORY +{ + rom (rx) : ORIGIN = 0x08000000, LENGTH = 1024K + ram (rwx) : ORIGIN = 0x20000000, LENGTH = 128K +} + +/* Include the common ld script. */ +INCLUDE libopencm3_stm32f4.ld + -- cgit v1.2.3