From 2ca7c909174358bedc4f20ce430f4fc1e6d102f4 Mon Sep 17 00:00:00 2001
From: Stephen Caudle <stephen@caudle.info>
Date: Mon, 27 Jul 2015 22:21:10 -0400
Subject: Add EXT driver for nRF51

---
 testhal/NRF51/NRF51822/EXT/main.c | 128 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 testhal/NRF51/NRF51822/EXT/main.c

(limited to 'testhal/NRF51/NRF51822/EXT/main.c')

diff --git a/testhal/NRF51/NRF51822/EXT/main.c b/testhal/NRF51/NRF51822/EXT/main.c
new file mode 100644
index 0000000..8d24d021
--- /dev/null
+++ b/testhal/NRF51/NRF51822/EXT/main.c
@@ -0,0 +1,128 @@
+/*
+    Copyright (C) 2015 Stephen Caudle
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#include "ch.h"
+#include "hal.h"
+
+#ifndef DEBOUNCE_TIME
+#define DEBOUNCE_TIME 100
+#endif
+
+static virtual_timer_t vt1;
+static virtual_timer_t vt2;
+static bool debouncing1;
+static bool debouncing2;
+
+/* LED1 toggled after debounce.*/
+static void led1toggle(void *arg) {
+
+  (void)arg;
+  palTogglePad(IOPORT1, LED1);
+  debouncing1 = false;
+}
+
+/* LED2 toggled after debounce.*/
+static void led2toggle(void *arg) {
+
+  (void)arg;
+  palTogglePad(IOPORT1, LED2);
+  debouncing2 = false;
+}
+
+static void extcb1(EXTDriver *extp, expchannel_t channel)
+{
+  (void)extp;
+  (void)channel;
+
+  uint8_t pad1 = palReadPad(IOPORT1, KEY1);
+
+  if (!debouncing1 && (pad1 == PAL_LOW)) {
+    debouncing1 = true;
+    chSysLockFromISR();
+    chVTSetI(&vt1, MS2ST(DEBOUNCE_TIME), led1toggle, NULL);
+    chSysUnlockFromISR();
+  } else if (debouncing1 && (pad1 == PAL_HIGH)) {
+    chSysLockFromISR();
+    if (chVTIsArmedI(&vt1))
+      chVTResetI(&vt1);
+    chSysUnlockFromISR();
+    debouncing1 = false;
+  }
+}
+
+static void extcb2(EXTDriver *extp, expchannel_t channel)
+{
+  (void)extp;
+  (void)channel;
+
+  uint8_t pad2 = palReadPad(IOPORT1, KEY2);
+
+  if (!debouncing2 && (pad2 == PAL_LOW)) {
+    debouncing2 = true;
+    chSysLockFromISR();
+    chVTSetI(&vt2, MS2ST(DEBOUNCE_TIME), led2toggle, NULL);
+    chSysUnlockFromISR();
+  } else if (debouncing2 && (pad2 == PAL_HIGH)) {
+    chSysLockFromISR();
+    if (chVTIsArmedI(&vt2))
+      chVTResetI(&vt2);
+    chSysUnlockFromISR();
+    debouncing2 = false;
+  }
+}
+
+static const EXTConfig extcfg =
+{
+  {
+    {EXT_CH_MODE_FALLING_EDGE | EXT_CH_MODE_AUTOSTART | (KEY1 << EXT_MODE_GPIO_OFFSET), extcb1},
+    {EXT_CH_MODE_RISING_EDGE | EXT_CH_MODE_AUTOSTART | (KEY2 << EXT_MODE_GPIO_OFFSET), extcb2},
+  }
+};
+
+/*
+ * Application entry point.
+ */
+int main(void)
+{
+  /*
+   * System initializations.
+   * - HAL initialization, this also initializes the configured device drivers
+   *   and performs the board-specific initializations.
+   * - Kernel initialization, the main() function becomes a thread and the
+   *   RTOS is active.
+   */
+  halInit();
+  chSysInit();
+
+  extStart(&EXTD1, &extcfg);
+
+  /*
+   * Normal main() thread activity, in this demo it enables and disables the
+   * button EXT channel using 5 seconds intervals.
+   */
+  while (TRUE) {
+    palSetPad(IOPORT1, LED0);
+    chThdSleepMilliseconds(5000);
+    extChannelDisable(&EXTD1, 0);
+    extChannelDisable(&EXTD1, 1);
+    palClearPad(IOPORT1, LED0);
+    chThdSleepMilliseconds(5000);
+    extChannelEnable(&EXTD1, 0);
+    extChannelEnable(&EXTD1, 1);
+  }
+
+  return 0;
+}
-- 
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