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I have written a simple A/D program to output details to P4 and a seven seg display attached to Port 5. I wish to transmit this information via the RS232 to the terminal emulator (Hypertermial)but I am having problems with the code to set up the UART. So far I have the following working sections in the program (A/D conversion, Binary - BCD) This is the code I have so far added to attempt the transmission via RS232
void initialise_serial0_for_baudrate() { BD = 1; //Enable Baud Rate Generator PCON = 0x80; //Set SMOD to double baudrate T1 = 1; //Initially set transmitt flag } void Transmit() { T1=0; //Clear TI flag S0BUF = P5; //Output information while(!T1) {;} //Wait until transmit flag is set }
At a casual glance it appears you have used T1 (T ONE) instead of TI (T I). The Transmit Interrupt bit is labeled TI. Could that be the problem? You may want to take a look at the HELLO example program that comes with the Keil tools in the Examples folder. This short program configures the serial port and transmits "Hello World\n". Jon