126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2018 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 "chprintf.h"
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#include "string.h"
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#define BUFFER_SIZE 16
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static virtual_timer_t vt3;
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static char txbuf[BUFFER_SIZE] = "0123456789ABCDEF";
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static char rxbuf[BUFFER_SIZE];
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static const SerialConfig sdcfg = {
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115200,
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0,
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UART_MR_PAR_NO
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};
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static void led3off(void *p) {
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(void)p;
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palSetLine(LINE_LED_RED);
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}
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/*
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* This callback is invoked when a receive buffer has been completely written.
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*/
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static void rxend(SPIDriver *spip) {
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(void)spip;
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palClearLine(LINE_LED_RED);
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chSysLockFromISR();
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chVTResetI(&vt3);
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chVTSetI(&vt3, TIME_MS2I(50), led3off, NULL);
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chSysUnlockFromISR();
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}
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/*
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* Master SPI configuration (83MHz (MCK/3/2), CPHA=0, CPOL=0, MSb first).
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*/
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static const SPIConfig mst_spicfg = {
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rxend, /* callback if present */
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0, /* cs pad number */
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SPI_MR_MODFDIS | SPI_MR_LLB, /* mr register */
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SPI_CSR_SCBR(1) /* csr */
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};
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/*
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* LED blinker thread, times are in milliseconds.
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*/
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static THD_WORKING_AREA(waThread1, 512);
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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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palToggleLine(LINE_LED_BLUE);
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chThdSleepMilliseconds(500);
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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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/*
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* Activates the serial driver 1 using the driver default configuration.
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*/
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sdStart(&SD1, &sdcfg);
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spiStart(&SPID1, &mst_spicfg); /* Setup transfer parameters. */
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/* Redirecting SPI1 pins. */
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palSetGroupMode(PIOD, PAL_PORT_BIT(25) | PAL_PORT_BIT(26) |
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PAL_PORT_BIT(27) | PAL_PORT_BIT(28) , 0U,
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PAL_SAMA_FUNC_PERIPH_A | PAL_MODE_SECURE);
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chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO , Thread1, NULL);
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while (true) {
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if(!palReadPad(PIOB, PIOB_USER_PB)) {
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/* SPI operation in loopback*/
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spiExchange(&SPID1, BUFFER_SIZE, &txbuf, &rxbuf);
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/* D-Cache L1 is enabled */
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cacheInvalidateRegion(&rxbuf, sizeof(rxbuf));
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if (!memcmp(txbuf, rxbuf, BUFFER_SIZE)){
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chprintf((BaseSequentialStream*)&SD1, "Transfer complete\n\r");
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}
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else {
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chprintf((BaseSequentialStream*)&SD1, "ERROR: Buffers are not the same!\n\r");
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}
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}
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chThdSleepMilliseconds(500);
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}
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}
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