MCC MIIC-203 Guia do Utilizador descarregar pdf (Página 54)

Enter Byte Count (Decimal 0...32767) then Press Enter, or ESCape to Cancel. A

Byte Count of Zero (0) represents a Variable Length message, where the first byte

read from the I

C Slave device indicates the number of additional trailing bytes that

are available to read. The iPort/AFM automatically reads the first byte, then the

additional bytes as specified by the first byte. All message bytes including the

Length byte are returned to the Host computer.

The received text is a representation of the data bytes within the Master Receive

message. The format of this data is controlled by the current setting of the Hex Only

Display Control .

If the slave device acknowledges its I

C Slave Address, the specified number of

bytes are read. The iPort/AFM acknowledges all bytes read except the last. If not

disabled, the message is then terminated with an I

C Stop condition.

Sending Master Receive messages with No Stop allows the Master to retain

exclusive control of the I

C Bus until it finally sends a Stop. During this time, the

Master can send additional (Repeated Start) Master Transmit or Master Receive

messages to the same or other I

C Slave devices.

Command: /(*)Rnnnn[CR] 'Master Read Message (* = No Stop)

Response 1: /MRCtext[CR] 'Master Read Complete

Response 2: /SNA[CR] 'Slave Not Acknowledging

Response 3: /I81[CR] 'iPort/AFM is Busy, Command Ignored

Response 4: /I83[CR] ' I

C Arbitration Loss Detected

Response 5: /I88[CR] 'iPort Connection Not Open

Response 6: /I89[CR] 'Invalid Command Argument

Default Setting: None

Slave Transmit Message

This command should be issued to iPort/AFM in response to a Slave Transmit

Request (/STR). This command causes iPort/AFM to write the specified data bytes

to the requesting I

C Master Receiver device.

Enter Message Bytes (1 or more Printable ASCII or Hex-equivalent ~00..~FF), then

Press Enter, or ESCape to Cancel.

Note 1: Upon receiving a Slave Transmit request from a Master Receiver device on

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MCC MIIC-203 Guia do Utilizador Página 54