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authorStephen Caudle2011-10-31 00:42:26 -0400
committerStephen Caudle2011-10-31 00:44:04 -0400
commit59df80398b8fb7b6837ea885c351046ff2818413 (patch)
treed2cb9b15d419c0dd7acd312afa8ecc0db885a2f4 /examples/stm32/f4/stm32-discovery
parent5a89d4459146edfb073e8ffa299cd9598a98c27c (diff)
Add miniblink example for STM32F4 discovery board
Diffstat (limited to 'examples/stm32/f4/stm32-discovery')
-rw-r--r--examples/stm32/f4/stm32-discovery/miniblink/Makefile23
-rw-r--r--examples/stm32/f4/stm32-discovery/miniblink/README9
-rw-r--r--examples/stm32/f4/stm32-discovery/miniblink/miniblink.c73
-rw-r--r--examples/stm32/f4/stm32-discovery/miniblink/miniblink.ld32
4 files changed, 137 insertions, 0 deletions
diff --git a/examples/stm32/f4/stm32-discovery/miniblink/Makefile b/examples/stm32/f4/stm32-discovery/miniblink/Makefile
new file mode 100644
index 0000000..24a478b
--- /dev/null
+++ b/examples/stm32/f4/stm32-discovery/miniblink/Makefile
@@ -0,0 +1,23 @@
+##
+## This file is part of the libopencm3 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 = miniblink
+
+include ../../Makefile.include
+
diff --git a/examples/stm32/f4/stm32-discovery/miniblink/README b/examples/stm32/f4/stm32-discovery/miniblink/README
new file mode 100644
index 0000000..cffce60
--- /dev/null
+++ b/examples/stm32/f4/stm32-discovery/miniblink/README
@@ -0,0 +1,9 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is the smallest-possible example program using libopencm3.
+
+It's intended for the ST STM32VLDISCOVERY eval board. It should blink
+the blue LED on the board.
+
diff --git a/examples/stm32/f4/stm32-discovery/miniblink/miniblink.c b/examples/stm32/f4/stm32-discovery/miniblink/miniblink.c
new file mode 100644
index 0000000..1bbcbe2
--- /dev/null
+++ b/examples/stm32/f4/stm32-discovery/miniblink/miniblink.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
+ *
+ * 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 <libopencm3/stm32/f4/rcc.h>
+#include <libopencm3/stm32/f4/gpio.h>
+
+void gpio_setup(void)
+{
+ /* Enable GPIOD clock. */
+ /* Manually: */
+ // RCC_AHB1ENR |= RCC_AHB1ENR_IOPDEN;
+ /* Using API functions: */
+ rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN);
+
+ /* Set GPIO12 (in GPIO port D) to 'output push-pull'. */
+ /* Manually: */
+ // GPIOD_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((8 - 8) * 4) + 2));
+ // GPIOD_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((8 - 8) * 4));
+ /* Using API functions: */
+ gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,
+ GPIO_PUPD_NONE,
+ GPIO12);
+}
+
+int main(void)
+{
+ int i;
+
+ gpio_setup();
+
+ /* Blink the LED (PC8) on the board. */
+ while (1) {
+ /* Manually: */
+ // GPIOD_BSRR = GPIO12; /* LED off */
+ // for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ // __asm__("nop");
+ // GPIOD_BRR = GPIO12; /* LED on */
+ // for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ // __asm__("nop");
+
+ /* Using API functions gpio_set()/gpio_clear(): */
+ // gpio_set(GPIOD, GPIO12); /* LED off */
+ // for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ // __asm__("nop");
+ // gpio_clear(GPIOD, GPIO12); /* LED on */
+ // for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ // __asm__("nop");
+
+ /* Using API function gpio_toggle(): */
+ gpio_toggle(GPIOD, GPIO12); /* LED on/off */
+ for (i = 0; i < 1000000; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}
diff --git a/examples/stm32/f4/stm32-discovery/miniblink/miniblink.ld b/examples/stm32/f4/stm32-discovery/miniblink/miniblink.ld
new file mode 100644
index 0000000..1cb43c6
--- /dev/null
+++ b/examples/stm32/f4/stm32-discovery/miniblink/miniblink.ld
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
+ *
+ * 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 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
+