testhal/STM32/STM32F3xx/SPI/main.c


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generated by cgit v1.2.3 (git 2.25.1) at 2025-11-14 11:21:08 +0000
 

">512];

/*
 * SPI bus contender 1.
 */
static THD_WORKING_AREA(spi_thread_1_wa, 256);
static THD_FUNCTION(spi_thread_1, p) {

  (void)p;
  chRegSetThreadName("SPI thread 1");
  while (true) {
    spiAcquireBus(&SPID2);              /* Acquire ownership of the bus.    */
    palSetPad(GPIOE, GPIOE_LED10_RED);  /* LED ON.                          */
    spiStart(&SPID2, &hs_spicfg);       /* Setup transfer parameters.       */
    spiSelect(&SPID2);                  /* Slave Select assertion.          */
    spiExchange(&SPID2, 512,
                txbuf, rxbuf);          /* Atomic transfer operations.      */
    spiUnselect(&SPID2);                /* Slave Select de-assertion.       */
    spiReleaseBus(&SPID2);              /* Ownership release.               */
  }
}

/*
 * SPI bus contender 2.
 */
static THD_WORKING_AREA(spi_thread_2_wa, 256);
static THD_FUNCTION(spi_thread_2, p) {

  (void)p;
  chRegSetThreadName("SPI thread 2");
  while (true) {
    spiAcquireBus(&SPID2);              /* Acquire ownership of the bus.    */
    palClearPad(GPIOE, GPIOE_LED10_RED);/* LED OFF.                         */
    spiStart(&SPID2, &ls_spicfg);       /* Setup transfer parameters.       */
    spiSelect(&SPID2);                  /* Slave Select assertion.          */
    spiExchange(&SPID2, 512,
                txbuf, rxbuf);          /* Atomic transfer operations.      */
    spiUnselect(&SPID2);                /* Slave Select de-assertion.       */
    spiReleaseBus(&SPID2);              /* Ownership release.               */
  }
}
/*
 * This is a periodic thread that does absolutely nothing except flashing
 * a LED.
 */
static THD_WORKING_AREA(blinker_wa, 128);
static THD_FUNCTION(blinker, arg) {

  (void)arg;
  chRegSetThreadName("blinker");
  while (true) {
    palSetPad(GPIOE, GPIOE_LED3_RED);
    chThdSleepMilliseconds(500);
    palClearPad(GPIOE, GPIOE_LED3_RED);
    chThdSleepMilliseconds(500);
  }
}

/*
 * Application entry point.
 */
int main(void) {
  unsigned i;

  /*
   * 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();

  /*
   * SPI2 I/O pins setup.
   */
  palSetPadMode(GPIOB, 13, PAL_MODE_ALTERNATE(5) |
                           PAL_STM32_OSPEED_HIGHEST);       /* New SCK.     */
  palSetPadMode(GPIOB, 14, PAL_MODE_ALTERNATE(5) |
                           PAL_STM32_OSPEED_HIGHEST);       /* New MISO.    */
  palSetPadMode(GPIOB, 15, PAL_MODE_ALTERNATE(5) |
                           PAL_STM32_OSPEED_HIGHEST);       /* New MOSI.    */
  palSetPadMode(GPIOB, 12, PAL_MODE_OUTPUT_PUSHPULL |
                           PAL_STM32_OSPEED_HIGHEST);       /* New CS.      */
  palSetPad(GPIOB, 12);

  /*
   * Prepare transmit pattern.
   */
  for (i = 0; i < sizeof(txbuf); i++)
    txbuf[i] = (uint8_t)i;

  /*
   * Starting the transmitter and receiver threads.
   */
  chThdCreateStatic(spi_thread_1_wa, sizeof(spi_thread_1_wa),
                    NORMALPRIO + 1, spi_thread_1, NULL);
  chThdCreateStatic(spi_thread_2_wa, sizeof(spi_thread_2_wa),
                    NORMALPRIO + 1, spi_thread_2, NULL);

  /*
   * Starting the blinker thread.
   */
  chThdCreateStatic(blinker_wa, sizeof(blinker_wa),
                    NORMALPRIO-1, blinker, NULL);

  /*
   * Normal main() thread activity, in this demo it does nothing.
   */
  while (true) {
    chThdSleepMilliseconds(500);
  }
  return 0;
}