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Hi I want to connect GSM modem to the STRE912 board I configured the uart which can recieve interrupt from modem I am using uart 0 for connecting the modem and uart 2 to debug the application but the modem is giveing timeout errorthe processor is str912Fw44 I used both ways ( by RS232 as well as TTL level to connect to the modem) but it gives timeout error
Another thing that can be done - but most often when you do not have access to the source code or do not want to change anything in a system - is to connect a sniffer.
Take tx and ground and wire to a separate RS232 connector.
Take rx and ground and wire to a separate RS232 connector.
Now you can use a PC with two serial ports - one serial port will monitor data sent in one direction, and one serial port will monitor data sent in the other direction.
Buy or locate a good log program that will time-stamp all data, and that can be taught to look at framing when time-stamping and presenting the transmitted data.