COPTONIX I2C-RS232-Adapter, Руководство пользователя

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Rev1.4 April 2014
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6.2.2 ReadData
This command is used for reading data that were received from UART and temporary
written into internal RAM.
ReadData command (0x72)
Byte content Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Slave Address A7 A6 A5 A4 A3 A2 A1 0
1 ReadData 0 1 1 1 0 0 1 0
ReadData Response
Byte content Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Slave Address A7 A6 A5 A4 A3 A2 A1 1
1 Slave Address Slave address of the selected device
2 Byte 1 1. Byte
… ... …
n+1 Byte n n Bytes (up to 128 bytes; n = Length)
When the adapter receives a message from UART, then output Pin5 is set low. This
Pin remains low until the ReadData command is issued, then Pin5 ist set high.
6.2.3 ReadCount
This command returns the number of bytes received from the UART interface.
ReadCount command (0x63)
Byte content Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Slave Address (W) A7 A6 A5 A4 A3 A2 A1 0
1 ReadCount 0 1 1 0 0 0 1 1
ReadCount Response
Byte Content Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Slave Address (R) A7 A6 A5 A4 A3 A2 A1 1
1 Slave Address Slave address of the selected device
2 Count Count of received bytes
3 Status x x x x x x x S
Status
0 Data already read S
1 New data packet
x Do not care