I managed to partially solve the problem. by inserting this c block: --------------------------------------------------------- // UART1 - PIC18F45K22 - 9600 bps - 4 MHz - 8N1 // Imposta modalità asincrona TXSTAbits.SYNC = 0; // Asynchronous mode TXSTAbits.BRGH = 1; // High speed baud rate BAUDCONbit...

Good morning Mario,
I made a modbus rtu communication program with a pic series 16, but when I reciprocated it on a series 18f45 K..., the communication didn't work.
Could you show me how you managed to implement the communication ports?
Thanks
Luigi

GOOD MORNING, I MADE A MODBUS COMMUNICATION PROGRAM OVER RS232 THAT WHEN COMPILED ON THE 16F887 WORKS PERFECTLY. WHEN I RECOMPILE IT FOR THE PIC18F45K22, THE COMMUNICATION DOESN'T WORK AT ALL. COMPARED TO THE PROGRAM THAT WORKED ON THE PIC 16F887, I ADDED THE UART PORT INITIALIZATION. BUT IT DOESN'T...