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-rw-r--r--examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/Makefile22
-rw-r--r--examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/README9
-rw-r--r--examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch.c88
3 files changed, 119 insertions, 0 deletions
diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/Makefile b/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/Makefile
new file mode 100644
index 0000000..c6e785a
--- /dev/null
+++ b/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/Makefile
@@ -0,0 +1,22 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2012 chrysn <chrysn@fsfe.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/>.
+##
+
+BINARY = lightswitch
+
+include ../Makefile.include
diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/README b/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/README
new file mode 100644
index 0000000..4b6b333
--- /dev/null
+++ b/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/README
@@ -0,0 +1,9 @@
+============================================
+EFM32-TG-STK3300 Examples lightswitch README
+============================================
+
+This is a small example program for GPIO input and output (and, in future, IRQ
+handling).
+
+It's intended for the EFM32-TG-STK3300 eval board. It turn the User LED on when
+PB0 is pressed, and off when PB1 is pressed.
diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch.c b/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch.c
new file mode 100644
index 0000000..7b4e0ce
--- /dev/null
+++ b/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch.c
@@ -0,0 +1,88 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 chrysn <chrysn@fsfe.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/>.
+ */
+
+#include <libopencm3/efm32/tinygecko/gpio.h>
+#include <libopencm3/efm32/tinygecko/cmu.h>
+
+void gpio_setup(void);
+void led_on(void);
+void led_off(void);
+bool pb0_get(void);
+bool pb1_get(void);
+
+/** @file
+ * Example for switching the User LED of the EFM32-TG-STK330 eval board on and
+ * off using the buttons.
+ */
+
+int main(void)
+{
+ gpio_setup();
+
+ while(1) {
+ if (pb0_get()) led_on();
+ if (pb1_get()) led_off();
+ };
+}
+
+/**
+ * Enable GPIO, and set up port D7 as an output pin.
+ */
+
+void gpio_setup(void)
+{
+ // Before GPIO works, according to d0034_efm32tg_reference_manual.pdf
+ // note in section 28.3.7, we'll have to enable GPIO in CMU_HFPERCLKEN0
+
+ CMU_HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO;
+
+ // The User LED is connected to PD7 to the plus side of the LED
+ // according to t0011_efm32_tiny_gecko_stk_user_manual.pdf figures 16.2
+ // and 16.3 (called UIF_LED0)
+
+ gpio_set_mode(GPIO_PD, GPIO_MODE_PUSHPULL, GPIO7);
+
+ // Button PB0 is connected to pin PD8 and pulled low when pushed,
+ // Botton PB1 to pin PB11 (sources as for LED). Pullups and debouncing
+ // are alreay in place in hardware, so no filtering or pullup is
+ // needed.
+
+ gpio_set_mode(GPIO_PD, GPIO_MODE_INPUT, GPIO8);
+ gpio_set_mode(GPIO_PB, GPIO_MODE_INPUT, GPIO11);
+}
+
+void led_on(void)
+{
+ gpio_set(GPIO_PD, GPIO7);
+}
+
+void led_off(void)
+{
+ gpio_clear(GPIO_PD, GPIO7);
+}
+
+bool pb0_get(void)
+{
+ return !gpio_get(GPIO_PD, GPIO8);
+}
+
+bool pb1_get(void)
+{
+ return !gpio_get(GPIO_PB, GPIO11);
+}