From 505a05ccf48be13a79dac93c4a67f091fad833de Mon Sep 17 00:00:00 2001 From: Stephen Caudle Date: Mon, 31 Oct 2011 15:01:35 -0400 Subject: Add STM32F4 fancyblink example --- .../stm32/f4/stm32-discovery/fancyblink/Makefile | 23 ++++++++ .../stm32/f4/stm32-discovery/fancyblink/README | 9 ++++ .../f4/stm32-discovery/fancyblink/fancyblink.c | 61 ++++++++++++++++++++++ .../f4/stm32-discovery/fancyblink/fancyblink.ld | 32 ++++++++++++ 4 files changed, 125 insertions(+) create mode 100644 examples/stm32/f4/stm32-discovery/fancyblink/Makefile create mode 100644 examples/stm32/f4/stm32-discovery/fancyblink/README create mode 100644 examples/stm32/f4/stm32-discovery/fancyblink/fancyblink.c create mode 100644 examples/stm32/f4/stm32-discovery/fancyblink/fancyblink.ld (limited to 'examples/stm32/f4') diff --git a/examples/stm32/f4/stm32-discovery/fancyblink/Makefile b/examples/stm32/f4/stm32-discovery/fancyblink/Makefile new file mode 100644 index 0000000..1baec4d --- /dev/null +++ b/examples/stm32/f4/stm32-discovery/fancyblink/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 = fancyblink + +include ../../Makefile.include + diff --git a/examples/stm32/f4/stm32-discovery/fancyblink/README b/examples/stm32/f4/stm32-discovery/fancyblink/README new file mode 100644 index 0000000..88e24bf --- /dev/null +++ b/examples/stm32/f4/stm32-discovery/fancyblink/README @@ -0,0 +1,9 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This is the smallest-possible example program using libopencm3. + +It's intended for the ST STM32F4DISCOVERY eval board. It should blink +the LEDs on the board. + diff --git a/examples/stm32/f4/stm32-discovery/fancyblink/fancyblink.c b/examples/stm32/f4/stm32-discovery/fancyblink/fancyblink.c new file mode 100644 index 0000000..056b446 --- /dev/null +++ b/examples/stm32/f4/stm32-discovery/fancyblink/fancyblink.c @@ -0,0 +1,61 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Damjan Marion + * Copyright (C) 2011 Mark Panajotovic + * + * 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 + +/* Set STM32 to 168 MHz. */ +void clock_setup(void) +{ + rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]); + + /* Enable GPIOD clock. */ + rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN); +} + +void gpio_setup(void) +{ + /* Set GPIO12-15 (in GPIO port D) to 'output push-pull'. */ + gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, + GPIO_PUPD_NONE, + GPIO12 | GPIO13 | GPIO14 | GPIO15); +} + +int main(void) +{ + int i; + + clock_setup(); + gpio_setup(); + + /* Set two LEDs for wigwag effect when toggling. */ + gpio_set(GPIOD, GPIO12 | GPIO14); + + /* Blink the LEDs (PD12, PD13, PD14 and PD15) on the board. */ + while (1) { + /* Toggle LEDs. */ + gpio_toggle(GPIOD, GPIO12 | GPIO13 | GPIO14 | GPIO15); + for (i = 0; i < 6000000; i++) /* Wait a bit. */ + __asm__("nop"); + } + + return 0; +} diff --git a/examples/stm32/f4/stm32-discovery/fancyblink/fancyblink.ld b/examples/stm32/f4/stm32-discovery/fancyblink/fancyblink.ld new file mode 100644 index 0000000..1cb43c6 --- /dev/null +++ b/examples/stm32/f4/stm32-discovery/fancyblink/fancyblink.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