98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/*
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ChibiOS - Copyright (C) 2016 Theodore Ateba
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "ch.h"
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#include "hal.h"
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#include "chprintf.h"
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/**
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* @brief Global variables.
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*/
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BaseSequentialStream* chp = (BaseSequentialStream*) &SD1;
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static int isrCpt; /**< Interrupt counter. */
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/**
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* @brief This is the External Interruption 4 callback.
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* The onboard LED is toggled every time an interruption is
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* detected. A varible is also incremented.
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*/
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static void extcb(EXTDriver *extp, expchannel_t channel) {
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(void)extp;
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(void)channel;
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chSysLockFromISR();
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palTogglePad(IOPORT2, PORTB_LED1);
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isrCpt++;
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chSysUnlockFromISR();
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}
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/**
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* @brief EXT Driver configurations.
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*/
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static const EXTConfig extcfg = {
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{
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{EXT_CH_MODE_DISABLED , NULL}, /* INT0 Config. */
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{EXT_CH_MODE_DISABLED , NULL}, /* INT1 Config. */
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{EXT_CH_MODE_DISABLED , NULL}, /* INT2 Config. */
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{EXT_CH_MODE_DISABLED , NULL}, /* INT3 Config. */
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{EXT_CH_MODE_RISING_EDGE , extcb}, /* INT4 Config. */
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{EXT_CH_MODE_DISABLED , NULL}, /* INT5 Config. */
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}
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};
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/**
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* Application entry point.
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*/
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int main(void) {
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/*
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* System initializations.
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* - HAL initialization, this also initializes the configured device drivers
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* and performs the board-specific initializations.
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* - Kernel initialization, the main() function becomes a thread and the
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* RTOS is active.
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*/
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halInit();
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chSysInit();
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/*
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* External interrupt on the Pin D2 of the Arduino Mega2560.
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*/
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palSetPadMode(IOPORT5, PE4, PAL_MODE_INPUT); /* INT4 pin. */
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/*
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* Start the serial driver.
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*/
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sdStart(&SD1, NULL);
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/*
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* Active the EXT driver 1 and select INT channel 4.
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*/
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extStart(&EXTD1, &extcfg);
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extChannelEnable(&EXTD1, INT4);
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palClearPad(IOPORT2, PORTB_LED1);
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chprintf(chp, "\n\r EXT hal test started...");
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/*
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* Normal main() thread activity, in this demo it print IRQ counter every
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* seconde.
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*/
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while (TRUE) {
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chThdSleepMilliseconds(1000);
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chprintf(chp, "\n\r External Interrupt counter: %d", isrCpt);
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}
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}
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