From 44442e44c9491f61a5a443ae506ef0d55deabffd Mon Sep 17 00:00:00 2001 From: Piotr Esden-Tempski Date: Fri, 17 Dec 2010 23:36:12 +0100 Subject: Added obldc systick test program. --- examples/obldc/Makefile | 10 ++++- examples/obldc/systick/Makefile | 22 ++++++++++ examples/obldc/systick/systick.c | 89 +++++++++++++++++++++++++++++++++++++++ examples/obldc/systick/systick.ld | 31 ++++++++++++++ 4 files changed, 150 insertions(+), 2 deletions(-) create mode 100644 examples/obldc/systick/Makefile create mode 100644 examples/obldc/systick/systick.c create mode 100644 examples/obldc/systick/systick.ld (limited to 'examples') diff --git a/examples/obldc/Makefile b/examples/obldc/Makefile index 3c25b44..991178c 100644 --- a/examples/obldc/Makefile +++ b/examples/obldc/Makefile @@ -24,15 +24,21 @@ Q := @ MAKEFLAGS += --no-print-directory endif -all: led +all: led systick led: @printf " BUILD examples/obldc/led\n" $(Q)$(MAKE) -C led +systick: + @printf " BUILD examples/obldc/systick\n" + $(Q)$(MAKE) -C systick + clean: @printf " CLEAN examples/obldc/led\n" $(Q)$(MAKE) -C led clean + @printf " CLEAN examples/obldc/systick\n" + $(Q)$(MAKE) -C systick clean -.PHONY: led +.PHONY: led systick diff --git a/examples/obldc/systick/Makefile b/examples/obldc/systick/Makefile new file mode 100644 index 0000000..20c889f --- /dev/null +++ b/examples/obldc/systick/Makefile @@ -0,0 +1,22 @@ +## +## This file is part of the libopenstm32 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 = systick + +include ../../Makefile.include diff --git a/examples/obldc/systick/systick.c b/examples/obldc/systick/systick.c new file mode 100644 index 0000000..56769a0 --- /dev/null +++ b/examples/obldc/systick/systick.c @@ -0,0 +1,89 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Thomas Otto + * 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 +#include +#include +#include + +u32 temp32; + +void gpio_setup(void) +{ + /* Enable GPIOA clock. */ + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN); + /* Enable GPIOB clock. */ + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN); + + gpio_set(GPIOA, GPIO6); /* LED0 off */ + gpio_set(GPIOA, GPIO7); /* LED1 off */ + gpio_set(GPIOB, GPIO0); /* LED2 off */ + gpio_set(GPIOB, GPIO1); /* LED3 off */ + + /* Set GPIO6/7 (in GPIO port A) to 'output push-pull' for the LEDs. */ + gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, + GPIO_CNF_OUTPUT_PUSHPULL, GPIO6); + gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, + GPIO_CNF_OUTPUT_PUSHPULL, GPIO7); + + /* Set GPIO6/7 (in GPIO port B) to 'output push-pull' for the LEDs. */ + gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, + GPIO_CNF_OUTPUT_PUSHPULL, GPIO0); + gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, + GPIO_CNF_OUTPUT_PUSHPULL, GPIO1); +} + +void sys_tick_handler() +{ + temp32++; + + /* we call this handler every 1ms so 1000ms = 1s on/off */ + if (temp32 == 1000) { + gpio_toggle(GPIOA, GPIO6); /* LED2 on/off */ + temp32 = 0; + } +} + +int main(void) +{ + rcc_clock_setup_in_hse_16mhz_out_72mhz(); + gpio_setup(); + + gpio_clear(GPIOA, GPIO7); /* LED1 on */ + gpio_set(GPIOA, GPIO6); /* LED2 off */ + + temp32 = 0; + + /* 72MHz / 8 => 9000000 counts per second */ + systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8); + + /* 9000000/9000 = 1000 overflows per second - every 1ms one interrupt */ + systick_set_reload(9000); + + systick_interrupt_enable(); + + /* start counting */ + systick_counter_enable(); + + while(1); /* Halt. */ + + return 0; +} diff --git a/examples/obldc/systick/systick.ld b/examples/obldc/systick/systick.ld new file mode 100644 index 0000000..a1e9de5 --- /dev/null +++ b/examples/obldc/systick/systick.ld @@ -0,0 +1,31 @@ +/* + * This file is part of the libopenstm32 project. + * + * Copyright (C) 2010 Thomas Otto + * + * 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 an STM32F103RBT6 board (128K flash, 20K RAM). */ + +/* Define memory regions. */ +MEMORY +{ + rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K + ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K +} + +/* Include the common ld script from libopenstm32. */ +INCLUDE libopenstm32.ld + -- cgit v1.2.3