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diff --git a/testhal/STM32F0xx/EXT/main.c b/testhal/STM32F0xx/EXT/main.c
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+++ b/testhal/STM32F0xx/EXT/main.c
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+/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+ 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"
+
+static void led4off(void *arg) {
+
+ (void)arg;
+ palClearPad(GPIOC, GPIOC_LED4);
+}
+
+/* Triggered when the button is pressed or released. The LED4 is set to ON.*/
+static void extcb1(EXTDriver *extp, expchannel_t channel) {
+ static VirtualTimer vt4;
+
+ (void)extp;
+ (void)channel;
+ palSetPad(GPIOC, GPIOC_LED4);
+ chSysLockFromIsr();
+ if (chVTIsArmedI(&vt4))
+ chVTResetI(&vt4);
+ /* LED4 set to OFF after 200mS.*/
+ chVTSetI(&vt4, MS2ST(200), led4off, NULL);
+ chSysUnlockFromIsr();
+}
+
+static const EXTConfig extcfg = {
+ {
+ {EXT_CH_MODE_BOTH_EDGES | EXT_CH_MODE_AUTOSTART | EXT_MODE_GPIOA, extcb1},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL},
+ {EXT_CH_MODE_DISABLED, NULL}
+ }
+};
+
+/*
+ * 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();
+
+ /*
+ * Activates the EXT driver 1.
+ */
+ extStart(&EXTD1, &extcfg);
+
+ /*
+ * Normal main() thread activity, in this demo it enables and disables the
+ * button EXT channel using 5 seconds intervals.
+ */
+ while (TRUE) {
+ chThdSleepMilliseconds(5000);
+ extChannelDisable(&EXTD1, 0);
+ chThdSleepMilliseconds(5000);
+ extChannelEnable(&EXTD1, 0);
+ }
+}