/*
* Application entry point.
*/
int main(void) {
/*
* 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();
/*
* Starting and configuring the I2S driver 2.
*/
i2sStart(&I2SD2, &i2scfg);
palSetPadMode(GPIOB, 10, PAL_MODE_ALTERNATE(5));
palSetPadMode(GPIOC, 3, PAL_MODE_ALTERNATE(5));
/*
* Starting continuous I2S transfer.
*/
i2sStartExchange(&I2SD2);
/*
* Normal main() thread activity, if the button is pressed then the I2S
* transfer is stopped.
*/
while (true) {
if (palReadPad(GPIOA, GPIOA_BUTTON))
i2sStopExchange(&I2SD2);
chThdSleepMilliseconds(500);
}
return 0;
}
void mp45dt02Init(mp45dt02Config *config)
{
#if 0
PRINT("Initialising mp45dt02.\n\r"
"mp45dt02I2sData.buffer size: %u words %u bytes\n\r"
"mp45dt02ExpandedBuffer size: %u words %u bytes\n\r"
"MP45DT02_DECIMATED_BUFFER_SIZE: %u",
MP45DT02_I2S_BUFFER_SIZE_2B, sizeof(mp45dt02I2sData.buffer),
MP45DT02_EXPANDED_BUFFER_SIZE, sizeof(mp45dt02ExpandedBuffer),
MP45DT02_DECIMATED_BUFFER_SIZE);
#endif
initConfig = *config;
chSemObjectInit(&mp45dt02ProcessingSem, 0);
pMp45dt02ProcessingThd = chThdCreateStatic(mp45dt02ProcessingThdWA,
sizeof(mp45dt02ProcessingThdWA),
NORMALPRIO,
mp45dt02ProcessingThd, NULL);
dspInit();
memset(&mp45dt02I2sData, 0, sizeof(mp45dt02I2sData));
mp45dt02I2sData.guard = MEMORY_GUARD;
memset(&mp45dt02I2SConfig, 0, sizeof(mp45dt02I2SConfig));
mp45dt02I2SConfig.tx_buffer = NULL;
mp45dt02I2SConfig.rx_buffer = mp45dt02I2sData.buffer;
mp45dt02I2SConfig.size = MP45DT02_I2S_BUFFER_SIZE_2B;
mp45dt02I2SConfig.end_cb = mp45dt02Cb;
mp45dt02I2SConfig.i2scfgr = I2SCFG_MODE_MASTER_RECEIVE |
I2SCFG_STD_MSB_JUSTIFIED |
I2SCFG_CKPOL_STEADY_HIGH;
mp45dt02I2SConfig.i2spr = (SPI_I2SPR_I2SDIV & MP45DT02_I2SDIV) |
(SPI_I2SPR_ODD & (MP45DT02_I2SODD << I2SPR_I2SODD_SHIFT));
i2sStart(&MP45DT02_I2S_DRIVER, &mp45dt02I2SConfig);
i2sStartExchange(&MP45DT02_I2S_DRIVER);
}