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-rw-r--r--examples/obldc/Makefile10
-rw-r--r--examples/obldc/systick/Makefile22
-rw-r--r--examples/obldc/systick/systick.c89
-rw-r--r--examples/obldc/systick/systick.ld31
4 files changed, 150 insertions, 2 deletions
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 <uwe@hermann-uwe.de>
+##
+## 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 <http://www.gnu.org/licenses/>.
+##
+
+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 <tommi@viadmin.org>
+ * Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopenstm32/rcc.h>
+#include <libopenstm32/flash.h>
+#include <libopenstm32/gpio.h>
+#include <libopenstm32/nvic.h>
+#include <libopenstm32/systick.h>
+
+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 <tommi@viadmin.org>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+/* 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
+