Mikroelektronika MIKROE-350 データシート

329

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

sub procedure Rs485Master_Send(dim byref data_buffer as byte[20],
dim datalen as byte, dim slave_address as byte)

Nothing.

Sends message to Slave(s). Message format can be found at the bottom of this
page.

Parameters : 

- 

data_buffer:

data to be sent 

- 

datalen:

number of bytes for transmition. Valid values: 0...3. 

- 

slave_address:

Slave(s) address 

MCU must be initialized as a Master for RS-485 communication. See
RS485Master_Init.

It is the user’s responsibility to ensure (by protocol) that only one device sends
data via 485 bus at a time.

dim msg as byte[20]
...
' send 3 bytes of data to slave with address 0x12
RS485Master_Send(msg, 3, 0x12)