SPRINGCARD SAS PRNHSP01 用户手册
PMD2271-BA
page 92 of 118
S
PRING
C
ARD
PC/SC C
OUPLERS
- H663
GROUP
- Developer's reference manual
6.3.2.
Action on the buzzer
a.
Starting/stopping the buzzer
Some hardware feature a single tone beeper. To start the buzzer, send the sequence:
58 1C
<duration MSB> <duration LSB>
Where duration specifies the length of the tone, in milliseconds (max is 60000ms).
Set duration to 0 if you need to stop the buzzer before the duration started in a previous call.
Once such a command has been sent to the H663, the firmware no longer manages the buzzer
automatically.
Use the above command to make the firmware drive the buzzer automatically again.
Set duration to 0 if you need to stop the buzzer before the duration started in a previous call.
Once such a command has been sent to the H663, the firmware no longer manages the buzzer
automatically.
Use the above command to make the firmware drive the buzzer automatically again.
b.
Going back to default (buzzer managed by the coupler's firmware)
Send the sequence
58 1C
To go back to default mode.
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