93 lines
2.3 KiB
C
93 lines
2.3 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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/*
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* @brief Data to transmit over the spi bus.
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*/
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char txbuf[] = "ABCD";
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/**
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* @brief Spi callback.
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*/
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void spiCallback(SPIDriver *spip) {
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chnWrite(&SD1, (const uint8_t *)"*", 1);
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spip->txbuf = 0;
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};
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/**
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* @biref SPI configuration strucrture.
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*/
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static const SPIConfig spiCfg = {
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spiCallback, /* SPI callback. */
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IOPORT2, /* SPI chip select port. */
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7, /* SPI chip select pad. */
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SPI_CR_DORD_MSB_FIRST | /* SPI Data order. */
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SPI_CR_CPOL_CPHA_MODE(0) | /* SPI clock polarity and phase. */
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SPI_CR_SCK_FOSC_128, /* SPI clock. */
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SPI_SR_SCK_FOSC_2 /* SPI double speed bit. */
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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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* Activates the serial driver 1 using the driver default configuration.
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*/
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sdStart(&SD1, NULL);
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/*
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* Activate the spi driver 1 by using the defined configuration.
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*/
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spiStart(&SPID1, &spiCfg);
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chprintf(chp, "AVR SPI program testhal program example.\r\n");
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while (TRUE) {
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spiSelect(&SPID1);
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spiStartSend(&SPID1, 4, txbuf);
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spiUnselect(&SPID1);
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chThdSleepMilliseconds(1000);
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}
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/*
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* Stop the spi driver.
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*/
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spiStop(&SPID1);
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}
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