MRI lab: FPGA controller documentation
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Revision as of 16:30, 24 June 2010 by Steven Wasserman (Talk | contribs)
Control registers
Register | Field | Bits | Function | device |
---|---|---|---|---|
PhaseIncrement | 31:0 | Set frequency of generated sinewave | /dev/pio_phaseIncrement | |
Pulse1On | 31:0 | Duration of first pulse | /dev/pio_pulse1On | |
Pulse1Off | 31:0 | Interval between first and second pulses | /dev/pio_pulse1Off | |
Pulse2On | 31:0 | Duration of second pulse | /dev/pio_pulse2On | |
Pulse2Off | 31:0 | Minimum interval between end of second pulse and first pulse repeat | /dev/pio_pulse2off | |
PulseControl | /dev/pio_pulseControl | |||
13 | 0 = normal operation; 1 = reset digitizer | |||
12:11 | 00 = adc input (normal operation); 01 = adc test signal (count); 10 = test mode (DAC output); 11 = test mode (constant 0xDEADBEEF) | |||
10:8 | not yet implemented | |||
7 | 0 = do not wait; 1 = wait for fifo to empty | |||
6 | 0 = normal operation; 1 = ignore | |||
5 | 0 = normal operation; 1 = continuous operation | |||
4 | Start digitizer on positive edge | |||
3 | 0 = normal operation; 1 = disable ADC gate; | |||
2 | 0 = carrier; 1 = trigger | |||
1 | 0 = generate single pulse sequence; 1 = run continuously | |||
0 | Pulse starts on positive edge. |