Tekvox TekTouchPad Manual do Utilizador descarregar pdf (Página 32)

Appendix D – Interactive Touch Pad Protocol

General Commands Description

~~V<CR> Gives the Version of the firmware, returns: V s.s,h.h<CR><LF> where s.s

is the firmware version and h.h is the hardware version.

~~Gt Get Data command where t = type of data

Values for t:

C – Get configuration data

B – Get bitmap data

F – Get font data

S – Get logo data

Transfer format:

<SOH, Length MSB, Length LSB, Data ….., EOT>

Host responds with ACK when ready for next block until <Length> data received or time

out. The current time out value is 15 seconds. Block size is 512 bytes of data. <DLE> is

used for transferring raw data not intended to be interpreted as SOH or EOT.

SOH = 0x01, EOT = 0x04, DLE = 0x10, ACK = 0x06, NAK = 0x15

~~R Causes unit to reset

~~? Ping unit, returns “OK<CR><LF>”

~~<n Change the loader baud rate. The value n is an index for the baud rate desired:

0 – 9600, 1 – 19200, 2 – 38400, 3 – 56800, 4 – 115200.

~~S Report self test results

~~W Wake unit if in sleep mode

Button Commands

~~BPpb Causes button pb to be pressed where p = page number, b = button

number

~~BRpb Causes button pb to be released where p = page number, b = button

number

~~BSpb Causes the state of button pb to be returned, p = 'A' returns all buttons

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Tekvox TekTouchPad Manual do Utilizador Página 32