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added l4 examples
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‎examples/stm32/l4/Makefile.include‎

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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 <[email protected]>
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## Copyright (C) 2010 Piotr Esden-Tempski <[email protected]>
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser 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 library 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 Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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LIBNAME = opencm3_stm32l4
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DEFS += -DSTM32L4
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FP_FLAGS ?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
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ARCH_FLAGS = -mthumb -mcpu=cortex-m4 $(FP_FLAGS)
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################################################################################
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# OpenOCD specific variables
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OOCD ?= openocd
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OOCD_INTERFACE ?= stlink-v2-1
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OOCD_BOARD ?= stm32l4discovery
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################################################################################
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# Black Magic Probe specific variables
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# Set the BMP_PORT to a serial port and then BMP is used for flashing
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BMP_PORT ?=
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################################################################################
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# texane/stlink specific variables
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#STLINK_PORT ?= :4242
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include ../../../../Makefile.rules

‎examples/stm32/l4/nucleo-l476rg/miniblink/Makefile‎

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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 <[email protected]>
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser 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 library 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 Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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BINARY = miniblink
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LDSCRIPT = ../nucleo-l476rg.ld
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include ../../Makefile.include
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‎examples/stm32/l4/nucleo-l476rg/miniblink/README.md‎

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# README
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This is the smallest-possible example program using libopencm3.
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It's intended for the ST Nucleo-L476LG eval board. It should blink
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the green LED on the board.
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‎examples/stm32/l4/nucleo-l476rg/miniblink/miniblink.c‎

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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 <[email protected]>
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* Copyright (C) 2011 Stephen Caudle <[email protected]>
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* Copyright (C) 2012 Karl Palsson <[email protected]>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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 library 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/rcc.h>
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#include <libopencm3/stm32/gpio.h>
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static void gpio_setup(void)
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{
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/* Enable GPIOA clock. */
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/* Manually: */
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//RCC_AHB2ENR |= RCC_AHB2ENR_GPIOAEN;
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/* Using API functions: */
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rcc_periph_clock_enable(RCC_GPIOA);
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/* Set GPIO5 (in GPIO port A) to 'output push-pull'. */
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/* Using API functions: */
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gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO5);
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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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gpio_setup();
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/* Blink the LED (PA5) on the board. */
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while (1) {
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/* Manually: */
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// GPIOA_BSRR = (GPIO5 << 16); /* LED off */
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// for (i = 0; i < 1000000; i++) /* Wait a bit. */
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// __asm__("nop");
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// GPIOB_BRR = GPIO5; /* LED on */
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// for (i = 0; i < 1000000; i++) /* Wait a bit. */
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// __asm__("nop");
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/* Using API functions gpio_set()/gpio_clear(): */
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// gpio_set(GPIOA, GPIO5); /* LED off */
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// for (i = 0; i < 1000000; i++) /* Wait a bit. */
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// __asm__("nop");
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// gpio_clear(GPIOA, GPIO5); /* LED on */
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// for (i = 0; i < 1000000; i++) /* Wait a bit. */
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// __asm__("nop");
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/* Using API function gpio_toggle(): */
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gpio_toggle(GPIOA, GPIO5); /* LED on/off */
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for (i = 0; i < 1000000; i++) { /* Wait a bit. */
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__asm__("nop");
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}
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}
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return 0;
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}

‎examples/stm32/l4/nucleo-l476rg/nucleo-l476rg.ld‎

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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 <[email protected]>
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* Copyright (C) 2011 Stephen Caudle <[email protected]>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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 library 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Linker script for Nucleo L476RG (STM32L476RG, 1024K flash, 96K 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 = 1024K
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ram (rwx) : ORIGIN = 0x20000000, LENGTH = 96K
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}
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/* Include the common ld script. */
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INCLUDE libopencm3_stm32l4.ld
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