121 lines
3 KiB
C
121 lines
3 KiB
C
/*
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ChibiOS - Copyright (C) 2016..2018 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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BaseSequentialStream *chp = (BaseSequentialStream *) &SD1;
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uint16_t cpt = 0; /* Counter for serial print. */
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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_PRESCALER_DIV4_gc, /* prescaler. */
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SPI_MODE_0_gc, /* SPI clock mode. */
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true, /* SPI role "master/slave". */
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false, /* SPI data order. */
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false, /* SPI double speed bit. */
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SPI_INTLVL_OFF_gc, /* SPI interrupt level. */
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};
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/**
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* @brief Blink thread.
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*/
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static THD_WORKING_AREA(waThread1, 32);
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static THD_FUNCTION(Thread1, arg) {
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(void)arg;
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chRegSetThreadName("Blinker");
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while (true) {
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palClearPad(IOPORT5, PORTE_LED);
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chThdSleepMilliseconds(1000);
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palSetPad(IOPORT5, PORTE_LED);
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chThdSleepMilliseconds(100);
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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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palClearPad(IOPORT5, PORTE_LED);
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/*
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* Configure TX (PINC3) and RX (PIN2) for the USART1.
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*/
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palSetPadMode(IOPORT3, PIN3, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(IOPORT3, PIN2, PAL_MODE_INPUT_PULLUP);
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/*
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* Start the Serial driver 1 by using the 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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/*
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* Starts the LED blinker thread.
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*/
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chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
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chprintf(chp, "AVR SPI program testhal program example.\r\n");
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while (TRUE) {
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chprintf(chp, "Hello world %i.\r\n", cpt++);
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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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return 0;
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}
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