int instance_startcwmode(int chan)
{
//NOTE: SPI frequency must be < 3MHz
//reduce the SPI speed before switching to XTAL
SPI_ConfigFastRate(SPI_BaudRatePrescaler_16); //reduce SPI to < 3MHz
dwt_configcwmode(chan);
//measure the frequency
//Spectrum Analyser set:
//FREQ to be channel default e.g. 3.9936 GHz for channel 2
//SPAN to 10MHz
//PEAK SEARCH
return DWT_SUCCESS ;
}
void xtalcalibration(void)
{
int i;
uint8 chan = 2 ;
uint8 prf = DWT_PRF_16M ;
dwt_txconfig_t configTx ;
uint8 pow ;
//NOTE: SPI frequency must be < 3MHz
//reduce the SPI speed before switching to XTAL
//
// reset device
//
dwt_softreset();
//
// configure TX channel parameters
//
configTx.PGdly = txSpectrumConfig[chan].PGdelay ;
//Assume smart power is disabled - not relevant for XTAL trimming as CW mode
pow = txSpectrumConfig[chan].txPwr[prf - DWT_PRF_16M] & 0xFF ;
configTx.power = (pow | (pow << 8) | (pow << 16) | (pow << 24));
dwt_configuretxrf(&configTx);
dwt_configcwmode(chan);
for(i=0; i<=0x1F; i++)
{
dwt_xtaltrim(i);
//measure the frequency
//Spectrum Analyser set:
//FREQ to be channel default e.g. 3.9936 GHz for channel 2
//SPAN to 10MHz
//PEAK SEARCH
}
return;
}
int main()
{
Xil_ICacheEnable();
Xil_DCacheEnable();
print("---Entering main---\n\r");
{
printf("LEDs and switches\r\n");
XGpio_Initialize(&inGpio,XPAR_AXI_GPIO_1_DEVICE_ID);
XGpio_Initialize(&outGpio,XPAR_AXI_GPIO_0_DEVICE_ID);
XGpio_DiscreteWrite(&outGpio,1,0); // leds off
}
{
printf("Deca SPI test\r\n");
if (0 != openspi()){
printf("Init SPI failed\r\n");
} else {
// get switches
int sw = XGpio_DiscreteRead(&inGpio,1);
XGpio_DiscreteWrite(&outGpio,1,sw);
//printf("LED: %x\r\n",XGpio_DiscreteRead(&outGpio,1));
switch (sw & 0x7){
case 1:
printf("SS TWR INIT\r\n");
ssTwrInit();
break;
case 2:
printf("SS TWR RESP\r\n");
ssTwrResp();
break;
case 3:
printf("Simple TX\r\n");
simpleTx();
break;
case 4:
printf("Simple RX\r\n");
simpleRx();
break;
case 5:
printf("TX Wait\r\n");
txWait();
break;
case 6:
printf("RX Wait\r\n");
rxWait();
break;
default:
/* Reset and initialise DW1000. */
reset_DW1000();
dwt_initialise(DWT_LOADNONE);
/* Configure DW1000. */
printf("UBW configuration sequence\r\n");
dwt_configure(&config);
dwt_configuretxrf(&txconfig);
/* Activate continuous wave mode. */
dwt_configcwmode(config.chan);
/* Wait for the wanted duration of the continuous wave transmission. */
printf("Waiting for UBW continuous wave transmission delay: %ds\r\n",CONT_WAVE_DURATION_MS/1000);
deca_sleep(CONT_WAVE_DURATION_MS);
/* Software reset of the DW1000 to deactivate continuous wave mode and go back to default state. Initialisation and configuration should be run
* again if one wants to get the DW1000 back to normal operation. */
dwt_softreset();
}
printf("Deca test done. press any key\r\n");
getchar();
}
}
print("---Exiting main---\n\r");
Xil_DCacheDisable();
Xil_ICacheDisable();
return 0;
}
