88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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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 <util/delay.h>
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#include "chprintf.h"
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// #define SPI_ROLE SPI_ROLE_SLAVE
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#define SPI_ROLE SPI_ROLE_MASTER
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#if (SPI_ROLE == SPI_ROLE_MASTER)
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#define ROLE "Master"
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char msg[] = "Message from master\r\n";
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#else
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#define ROLE "Slave"
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char msg[] = "Message from slave \r\n";
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#endif
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void spicallback(SPIDriver *spip){
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chSequentialStreamPut(&SD1, '.');
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spip->txbuf = 0; // terminating null
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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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* SPI interface configuration
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*/
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static SPIConfig spicfg = {
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SPI_ROLE,
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IOPORT2,
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SPI1_SS,
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SPI_MODE_0,
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SPI_MSB_FIRST,
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SPI_SCK_FOSC_128,
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spicallback
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};
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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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spiStart(&SPID1, &spicfg);
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sdStart(&SD1, NULL);
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chprintf((BaseSequentialStream *) &SD1, "Start %s\r\n", ROLE);
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while(1) {
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char buf[24];
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#if (SPI_ROLE == SPI_ROLE_MASTER)
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spiSelect(&SPID1);
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spiExchange(&SPID1, sizeof(msg), msg, buf);
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spiUnselect(&SPID1);
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chprintf((BaseSequentialStream *) &SD1,"%s: %s\r\n", ROLE, buf);
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chThdSleepMilliseconds(500);
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#else
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spiExchange(&SPID1, sizeof(msg), msg, buf);
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chprintf((BaseSequentialStream *) &SD1,"%s: %s\r\n", ROLE, buf);
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#endif
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}
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}
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