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Added hitune command for continuously measuring HF antenna tuning

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This commit is contained in:
daniel.boteanu 2010-01-09 14:59:42 +00:00
commit 1eb7596aad
4 changed files with 36 additions and 2 deletions
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25
armsrc/appmain.c
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@ -202,6 +202,27 @@ void MeasureAntennaTuning(void)
UsbSendPacket((BYTE *)&c, sizeof(c));
}
void MeasureAntennaTuningHf(void)
{
int vHf = 0; // in mV
DbpString("Measuring HF antenna characteristics, press button to exit");
for (;;) {
// Let the FPGA drive the high-frequency antenna around 13.56 MHz.
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
SpinDelay(20);
// Vref = 3300mV, and an 10:1 voltage divider on the input
// can measure voltages up to 33000 mV
vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10;
Dbprintf("%d mV",vHf);
if (BUTTON_PRESS()) break;
}
DbpString("cancelled");
}
void SimulateTagHfListen(void)
{
BYTE *dest = (BYTE *)BigBuf;
@ -643,6 +664,10 @@ void UsbPacketReceived(BYTE *packet, int len)
MeasureAntennaTuning();
break;
case CMD_MEASURE_ANTENNA_TUNING_HF:
MeasureAntennaTuningHf();
break;
case CMD_LISTEN_READER_FIELD:
ListenReaderField(c->arg[0]);
break;