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5.5.2 Get Timing Report and Timing reply.
The controller requests the monitor to report the displayed image timing.
STX | Command code | ETX | ||
'0' | '7' | |||
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Send "07"(30h, 37h) as Get Timing Report command.
Complete "Get Timing Report" command packet as follows; ASCII:
STX | Command |
| SS |
| H Freq. |
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| V Freq. |
| ETX | ||||
'4' | 'E' | Hi |
| Lo | MSB |
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| LSB | MSB |
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| LSB | ||
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SS: Timing status byte
Bit 7 = 1: Sync Frequency is out of range.
Bit 6 = 1: Unstable count
Bit
Bit 1 1:Positive Horizontal sync polarity. 0:Negative Horizontal sync polarity.
Bit 0 1:Positive Vertical sync polarity. 0:Negative Vertical sync polarity.
H Freq: Horizontal Frequency in unit 0.01kHz
V Freq: Vertical Frequency in unit 0.01Hz
Ex.) When H Freq is '1''2''A''9' (31h, 32h, 41h, 39h), it means 47.77kHz.
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