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Diffstat (limited to 'examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch-common.c')
-rw-r--r--examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch-common.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch-common.c b/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch-common.c
new file mode 100644
index 0000000..0cd1204
--- /dev/null
+++ b/examples/efm32/tinygecko/efm32-tg-stk3300/lightswitch/lightswitch-common.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/>.
+ */
+
+/** @file Common definitions used by all lightswitch implementations */
+
+#include <libopencm3/efm32/tinygecko/gpio.h>
+#include <libopencm3/efm32/tinygecko/cmu.h>
+
+/** 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)
+ */
+#define LED_PORT GPIO_PD
+#define LED_PIN GPIO7
+
+#define BUTTON0_PORT GPIO_PD
+#define BUTTON0_PORT_EXTIPSEL GPIO_EXTIPSEL_PORTD
+#define BUTTON0_PIN_NUMBER 8
+#define BUTTON0_PIN GPIO8
+#define BUTTON1_PORT GPIO_PB
+#define BUTTON1_PORT_EXTIPSEL GPIO_EXTIPSEL_PORTB
+#define BUTTON1_PIN_NUMBER 11
+#define BUTTON1_PIN GPIO11
+
+void gpio_setup(void);
+void led_on(void);
+void led_off(void);
+
+bool pb0_get(void);
+bool pb1_get(void);
+
+/**
+ * Enable GPIO, and set up port D7 as an output pin and D8 and B11 as input.
+ */
+
+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;
+
+ gpio_set_mode(LED_PORT, GPIO_MODE_PUSHPULL, LED_PIN);
+
+ // 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(BUTTON0_PORT, GPIO_MODE_INPUT, BUTTON0_PIN);
+ gpio_set_mode(BUTTON1_PORT, GPIO_MODE_INPUT, BUTTON1_PIN);
+}
+
+void led_on(void)
+{
+ gpio_set(LED_PORT, LED_PIN);
+}
+
+void led_off(void)
+{
+ gpio_clear(LED_PORT, LED_PIN);
+}
+
+bool pb0_get(void)
+{
+ return !gpio_get(GPIO_PD, GPIO8);
+}
+
+bool pb1_get(void)
+{
+ return !gpio_get(GPIO_PB, GPIO11);
+}