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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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.
ChibiOS/RT 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/>.
*/
/**
* This program demonstrate how to use interrupt from EXTI line for waking
* up MCU from stop mode. EXTI line connected to UART RX pin and generate
* interrupt on falling edge of start bit.
*/
#include "ch.h"
#include "hal.h"
#include "shell.h"
#include "chprintf.h"
/* Wake up callback.*/
static void extcb2(EXTDriver *extp, expchannel_t channel) {
(void)extp;
(void)channel;
chSysLockFromIsr();
/* we must reinit clocks after waking up ESPECIALLY if use HSE or HSI+PLL */
stm32_clock_init();
extChannelDisableI(&EXTD1, 10);
chSysUnlockFromIsr();
}
static const EXTConfig extcfg = {
{
{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_FALLING_EDGE, extcb2},
{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_MODE_EXTI(0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
EXT_MODE_GPIOA,
0,
0,
0,
0,
0)
};
static void cmd_reboot(BaseChannel *chp, int argc, char *argv[]){
(void)argv;
if (argc > 0) {
chprintf(chp, "Usage: rboot\r\n");
return;
}
chprintf(chp, "rebooting...\r\n");
chThdSleepMilliseconds(100);
NVIC_SystemReset();
}
static void cmd_sleep(BaseChannel *chp, int argc, char *argv[]){
(void)argv;
if (argc > 0) {
chprintf(chp, "Usage: sleep\r\n");
return;
}
chprintf(chp, "Going to sleep. Type any character to wake up.\r\n");
chThdSleepMilliseconds(200);
extChannelEnable(&EXTD1, 10);
PWR->CR |= (PWR_CR_LPDS | PWR_CR_CSBF | PWR_CR_CWUF);
PWR->CR &= ~PWR_CR_PDDS;
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
__WFI();
}
static const ShellCommand commands[] = {
{"reboot", cmd_reboot},
{"sleep", cmd_sleep},
{NULL, NULL}
};
static const ShellConfig shell_cfg1 = {
(BaseChannel *)&SD1,
commands
};
/*
* 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);
/* Activates the serial driver using the driver default configuration.*/
sdStart(&SD1, NULL);
/* Setting up ports.*/
palSetPadMode(IOPORT1, 9, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
palSetPadMode(IOPORT1, 10, PAL_MODE_INPUT);
/* Shell manager initialization.*/
shellInit();
static WORKING_AREA(waShell, 512);
shellCreateStatic(&shell_cfg1, waShell, sizeof(waShell), NORMALPRIO);
/* Start blink indicating.*/
chThdSleepMilliseconds(2000);
while (TRUE) {
chThdSleepMilliseconds(100);
palTogglePad(IOPORT3, GPIOC_LED);
}
}
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