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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/>.
*/
#include "ch.h"
#include "hal.h"
#include <util/delay.h>
#include "chprintf.h"
// #define SPI_ROLE SPI_ROLE_SLAVE
#define SPI_ROLE SPI_ROLE_MASTER
#if (SPI_ROLE == SPI_ROLE_MASTER)
#define ROLE "Master"
char msg[] = "Message from master\r\n";
#else
#define ROLE "Slave"
char msg[] = "Message from slave \r\n";
#endif
void spicallback(SPIDriver *spip){
chSequentialStreamPut(&SD1, '.');
spip->txbuf = 0; // terminating null
}
/*
* Application entry point.
*/
int main(void) {
/*
* SPI interface configuration
*/
static SPIConfig spicfg = {
SPI_ROLE,
IOPORT2,
SPI1_SS,
SPI_MODE_0,
SPI_MSB_FIRST,
SPI_SCK_FOSC_128,
spicallback
};
/*
* 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();
spiStart(&SPID1, &spicfg);
sdStart(&SD1, NULL);
chprintf((BaseSequentialStream *) &SD1, "Start %s\r\n", ROLE);
while(1) {
char buf[24];
#if (SPI_ROLE == SPI_ROLE_MASTER)
spiSelect(&SPID1);
spiExchange(&SPID1, sizeof(msg), msg, buf);
spiUnselect(&SPID1);
chprintf((BaseSequentialStream *) &SD1,"%s: %s\r\n", ROLE, buf);
chThdSleepMilliseconds(500);
#else
spiExchange(&SPID1, sizeof(msg), msg, buf);
chprintf((BaseSequentialStream *) &SD1,"%s: %s\r\n", ROLE, buf);
#endif
}
}
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