| ??? 10/04/05 06:29 Read: times |
#101889 - Is there anyway to get it up to 115200? Responding to: ???'s previous message |
Linh Pham said:
Hi,
The XTAL for my 8051 is at 11.059Mhz and I'm able to pump the serial port up to 57600 with SCON = 0x52 TMOD = 0x20 SMOD = 1 TH1 = 0xFF Is there anyway to get it up to 115200? My pcb is working as a bridge between the PC and an external dialup modem. Is there any way to detect what's the connection speed between the PC & modem? Thanks in advance. solution 1. double the clock frequency, if you donot have X2 series ics of 8051 like 89c52x2bn from phillips. -------------------------------------------------------- solution 2 with the clock frequency of 11.0952MHz. if you have X2 series of Ics, with the same settings of SCON = 0x52 TMOD = 0x20 SMOD = 1 //( SMOD = 1?? Whether can it be set directly?.) TH1 = 0xFF You have to set the bit in CKCON# register address 8FH. ( not bt addressable ) – WDX2 PCAX2 SIX2 T2X2 T1X2 T0X2 X2 7 6 5 3 3 2 1 0 Either X2 bit or T1X2 bit, to get the desired baudrate. krishnaiah. |
| Topic | Author | Date |
| 8051 serial port at 115200? | 01/01/70 00:00 | |
| Baud rate & autobaud | 01/01/70 00:00 | |
| Is there anyway to get it up to 115200? | 01/01/70 00:00 | |
| who know if he can, there is no CKCON in | 01/01/70 00:00 | |
| Thanks, I'll try | 01/01/70 00:00 | |
| Baud rate is not the only issue! | 01/01/70 00:00 | |
| Wait a minute... | 01/01/70 00:00 | |
| 57600 is maximum | 01/01/70 00:00 | |
| there are more | 01/01/70 00:00 | |
| 89c2051/4051 | 01/01/70 00:00 | |
| 115200 baudrate | 01/01/70 00:00 | |
| OP | 01/01/70 00:00 | |
| a very sensible approach | 01/01/70 00:00 | |
| 22,1184 crystal | 01/01/70 00:00 | |
| 57600 not a maximum | 01/01/70 00:00 | |
| Data Compression | 01/01/70 00:00 | |
| on modems, compression and handshake | 01/01/70 00:00 | |
| if using flow control then what is the p | 01/01/70 00:00 | |
| faster modems != faster data transfer | 01/01/70 00:00 | |
Thanks everyone! | 01/01/70 00:00 |