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Software & Driver

 

5.2.17 - AsynchTX

Requires U3 hardware version 1.21. Sends bytes to the U3 UART which will be sent asynchronously on the transmit line.

Table 5.2.17-1. AsynchTX Command Response

Command:  
Byte  
0 Checksum8
1 0xF8
2 1 + NumAsynchWords
3 0×15
4 Checksum16 (LSB)
5 Checksum16 (MSB)
6 0×00
7 NumAsynchBytesToSend
8 AsynchByte0
   
Response:  
Byte  
0 Checksum8
1 0xF8
2 0×02
3 0×15
4 Checksum16 (LSB)
5 Checksum16 (MSB)
6 Errorcode
7 NumAsynchBytesSent
8 NumAsynchBytesInRXBuffer
9 0×00
  • NumAsynchWords: This is the number of asynch data bytes divided by 2. If the number of bytes is odd, round up and add an extra zero to the packet.
  • NumAsynchBytesToSend: Specifies how many bytes will be sent (0-56).
  • NumAsynchBytesInRXBuffer: Returns how many bytes are currently in the RX buffer.