How can I set Uart2 to exchange data?

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Read-Only Author Jonas zhuo Posted 12-Aug-2002 05:00 GMT Toolset C51	How can I set Uart2 to exchange data? Jonas zhuo void initialize_system (void) { // Initialize the serial port (9600, 8, N, 1) PCON &= 0xBF; // Clear bit 7 of the PCON register (SMOD1 = 0) SCON2 = 0x50; // 0101,0000 (Mode 1 and RxD enable) TMOD |= 0x20; // Timer #1 in autoreload 8 bit mode TCON = 0x40; // Set Timer #1 to run mode TH1 = 0xFD; // Baud rate is determined by // Timer #1 overflow rate // Baud Rate = (Fcpu / 384) / (256 - TH1) // Fcpu = 11.0592 MHz // TH1 = 253 TR1 = 1; // Turn on Timer 1 TI2 = 1; // Set UART2 to send first char } void main (void) { unsigned char aaa; initialize_system(); while(1) { aaa=_getkey(); printf("%c",aaa); putchar(aaa); } }
Read-Only Author Jon Ward Posted 12-Aug-2002 05:24 GMT Toolset C51	RE: How can I set Uart2 to exchange data? Jon Ward Since I'm not sure which chip you are using, I'll assume it's the Dallas 320. If that's the case, take a look at the following knowledgebase article: http://www.keil.com/support/docs/1324.htm Jon
Read-Only Author Jonas zhuo Posted 12-Aug-2002 05:36 GMT Toolset C51	RE: How can I set Uart2 to exchange data? Jonas zhuo to Jon, Thank u first. I use the ST Microcontroller uPSD3234A. I can use Uart0 to exchange data with PC. But I can't echange date with PC by Uart1. I think my code must have some bug. Please help me. Thank u.
Read-Only Author Eric VAN OLDEN Posted 14-Aug-2002 07:37 GMT Toolset C51	RE: How can I set Uart2 to exchange data? Eric VAN OLDEN I think _getkey(), printf() and putchar() in the library use first Uart in a standard 8051. If you to use 2nd Uart you must write a new _getkey() and a new putchar() in your application.
Read-Only Author Jonas zhuo Posted 14-Aug-2002 07:45 GMT Toolset C51	RE: How can I set Uart2 to exchange data? Jonas zhuo Eric, Thank you first for your suggestion. I have rewritten the putchar() and _getkey(). But it still had no response. I suspect the setting of my code. Thank you again.

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