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8 Threads found on rs485 Programming
If you already have rs485 hardware, it's ok, but if you cn choose the interface HW, I would have split Rx an Tx, and made a full duplex RS422 connection. rs485 is half duplex and you need to establish a proper protocol to manage who is transmitting at a given time. even if you listen in on the transmission you can't tell if you have a collision
MAX485 is convert UART to rs485. So, the programming is easy still use UART. Only, MAX485 need 1 more control RE/DE for either transmit or receive. If 1 part is transmitting, all other part must receiving.
i am using datamate 3000 for my is an small room air-condition monitoring device.. for my project i need to get the parameter details from datamate 3000 using rs485.. and then transmit the data using another rs485 to host.. i need some programming help... how to start with datamate 3000...
Thats really your RS232 to rs485 full or half duplex?
Could you please evaluate more about your request? There is many way to interface a PIC or more generally spoken a microcontroller with a PC, here is some example: - SERIAL (RS232 or RS422/rs485) - PARALLEL - USB - IRDA - BLUETOOTH .... Bye Pow
I am playing with serial port under windows 2k trying to implement modbus master working over rs485 in halfduplex mode . 232-485 covnerters transmit direction is controlled via RTS line (similar to described in Serial port complete). My problem is - i can not properly detect end of transmission (when last character has been transmitted from com po
10 week course using C covering multiple issues from rs232 rs485 CAN adc ... hope you enjoy
I want to write a program, running under PC. linux (redhat). to use PC.'s serial port work as rs485, use DTR to control direction. (use 75176 or MAX485) Could anyone show me the sample? Should I need to modify kernel source's serial port driver? ZeRoN