Serial communication between two microcontrollers
- Thread starter jayec1a
- Start date
Connect RX from one 8051 to TX of the other and vise versa.... configure the UARTS and write code to send and receive data....
If you need sample code use google to do a search there are plenty of examples out there like this >> http://www.atmel.com/tools/CODEEXAMPLESFOR8051UART.aspx
If you need sample code use google to do a search there are plenty of examples out there like this >> http://www.atmel.com/tools/CODEEXAMPLESFOR8051UART.aspx
Arm_n_Legs
- Joined Mar 7, 2007
- 186
Initialising your serial comm:
MOV SCON,#50H
MOV TMOD,#20H
MOV TH1,#0FDH
SETB TR1
Transmit:
MOV SUF,'A'
WAIT: JNB TI,WAIT
Receive:
JNB RI,ELSEWHERE
MOV A,SBUF
MOV SCON,#50H
MOV TMOD,#20H
MOV TH1,#0FDH
SETB TR1
Transmit:
MOV SUF,'A'
WAIT: JNB TI,WAIT
Receive:
JNB RI,ELSEWHERE
MOV A,SBUF
Howdy, roll your own (as I did) or use the uC modules' version. I prefer mine, if only that if (when) it fails, I can trace it since I wrote it. That, and I inevitably need to port it to a uC that doesn't have the module. This also allows for variables to define timings (delays) as required for any of the devices in the bus/link.
While an async link is easy, it's also (comparatively) slow. An I2C link is as fast as each state machine can keep up; with both ends in assembler, it Flies. Good Hunting... <<<)))
While an async link is easy, it's also (comparatively) slow. An I2C link is as fast as each state machine can keep up; with both ends in assembler, it Flies. Good Hunting... <<<)))
