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+--- Thread: help about write data RS232 (/showthread.php?tid=1318)
help about write data RS232 - datbui - 29.03.2018
Hello, I'm starting to work with logic machine, I've been connecting the logic machine to a pc through the rs232 port, I could write from the logic machine to a pc terminal, but result is wrong with string I wrote.
P/S: I conect LM5 Re:actor with PC by Board USB to USART.
Thank you.
RE: help about write data RS232 - admin - 29.03.2018
Check baud rate, stop bits and parity settings. Defaults for serial library are 115200, 1 stop bit, no parity.
RE: help about write data RS232 - datbui - 29.03.2018
(29.03.2018, 09:34)admin Wrote: Check baud rate, stop bits and parity settings. Defaults for serial library are 115200, 1 stop bit, no parity.
Thank you for your replay!
I checked, I use : Baud rate 115200, 1 stop bit, no parity.
I wrote string 'gh', Result: ' L'.
Thanks you.
My code in Resident:
if not port then
require('serial')
port = serial.open('/dev/RS232', { baudrate =115200 })
port:flush()
line = ''
end
port:write('gh')
RE: help about write data RS232 - admin - 29.03.2018
Are you sure you have USB-RS232 adapter? You might have USB-UART (TTL) which can be easily damaged if connected to RS-232 port.
RE: help about write data RS232 - datbui - 30.03.2018
(29.03.2018, 10:36)admin Wrote: Are you sure you have USB-RS232 adapter? You might have USB-UART (TTL) which can be easily damaged if connected to RS-232 port.
I use board USB to USART (chip CP2102- TTL) and use board STM32F4 discovery communicate by USART, both result same.
Thanks for help.