diff --git a/examples/stm32/f4/nucleo-f411re/blink/Makefile b/examples/stm32/f4/nucleo-f411re/blink/Makefile new file mode 100644 index 0000000..629af66 --- /dev/null +++ b/examples/stm32/f4/nucleo-f411re/blink/Makefile @@ -0,0 +1,25 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## +## This library is free software: you can redistribute it and/or modify +## it under the terms of the GNU Lesser General Public License as published by +## the Free Software Foundation, either version 3 of the License, or +## (at your option) any later version. +## +## This library 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 Lesser General Public License for more details. +## +## You should have received a copy of the GNU Lesser General Public License +## along with this library. If not, see . +## + +BINARY = blink + +LDSCRIPT = ../nucleo-f411re.ld + +include ../../Makefile.include + diff --git a/examples/stm32/f4/nucleo-f411re/blink/README.md b/examples/stm32/f4/nucleo-f411re/blink/README.md new file mode 100644 index 0000000..999904f --- /dev/null +++ b/examples/stm32/f4/nucleo-f411re/blink/README.md @@ -0,0 +1,10 @@ +# README + +This is the smallest-possible example program using libopencm3. + +It's intended for the ST Nucleo-F411RE eval board. It should blink +the GREEN LED on the board. + +## Board connections + +*none required* diff --git a/examples/stm32/f4/nucleo-f411re/blink/blink.c b/examples/stm32/f4/nucleo-f411re/blink/blink.c new file mode 100644 index 0000000..343c3f0 --- /dev/null +++ b/examples/stm32/f4/nucleo-f411re/blink/blink.c @@ -0,0 +1,73 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Stephen Caudle + * Copyright (c) 2015 Chuck McManis + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +#include +#include + +static void gpio_setup(void) +{ + /* Enable GPIOA clock. */ + /* Manually: */ + // RCC_AHB1ENR |= RCC_AHB1ENR_IOPAEN; + /* Using API functions: */ + rcc_periph_clock_enable(RCC_GPIOA); + + /* Set GPIO5 (in GPIO port A) to 'output push-pull'. */ + /* Manually: */ + // GPIOA_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((8 - 8) * 4) + 2)); + // GPIOA_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((8 - 8) * 4)); + /* Using API functions: */ + gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO5); +} + +int main(void) +{ + int i; + + gpio_setup(); + + /* Blink the LED (PC8) on the board. */ + while (1) { + /* Manually: */ + // GPIOA_BSRR = GPIO5; /* LED off */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + // GPIOA_BRR = GPIO5; /* LED on */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + + /* Using API functions gpio_set()/gpio_clear(): */ + // gpio_set(GPIOA, GPIO5); /* LED off */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + // gpio_clear(GPIOA, GPIO5); /* LED on */ + // for (i = 0; i < 1000000; i++) /* Wait a bit. */ + // __asm__("nop"); + + /* Using API function gpio_toggle(): */ + gpio_toggle(GPIOA, GPIO5); /* LED on/off */ + for (i = 0; i < 1000000; i++) { /* Wait a bit. */ + __asm__("nop"); + } + } + + return 0; +} diff --git a/examples/stm32/f4/nucleo-f411re/nucleo-f411re.ld b/examples/stm32/f4/nucleo-f411re/nucleo-f411re.ld new file mode 100644 index 0000000..fa24619 --- /dev/null +++ b/examples/stm32/f4/nucleo-f411re/nucleo-f411re.ld @@ -0,0 +1,32 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * Copyright (C) 2011 Stephen Caudle + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +/* Linker script for Nucleo F411RE (STM32F411RE, 512K flash, 128K RAM). */ + +/* Define memory regions. */ +MEMORY +{ + rom (rx) : ORIGIN = 0x08000000, LENGTH = 512K + ram (rwx) : ORIGIN = 0x20000000, LENGTH = 128K +} + +/* Include the common ld script. */ +INCLUDE libopencm3_stm32f4.ld +