http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. Thu, 04 Dec 2008 10:43:18 -0800 http://backend.userland.com/rss092 Hi guys, I've been having problems getting my 8052 to communicate serially. I have a handmade board with a max 232 and 8052 and other supporting circ <noauthor@nospam.com> http://www.8051projects.net/forum-t10557.html Change TMOD value to 0x20.Are you using a 11.0592 MHz xtal?Is your micro working at all?Insert a small led blinky in your code and see if the led blin sashijoseph<sashijoseph@nospam.com> http://www.8051projects.net/forum-t10557.html yikes! my mistake..the db9 pin no 5 wasnt grounded thank you for the reply ok..but I still have a problem. Now that my MCU works fine (its now disp zen bEaR<shakirfm@nospam.com> http://www.8051projects.net/forum-t10557.html there is something called porttalk which unlocks your ports. Porttalk Driver download:http://www.beyondlogic.org/porttalk/porttalk.htmPorttalk install Ajay<contact@nospam.com> http://www.8051projects.net/forum-t10557.html well TMOD just configure your timers,20 means Timer 1 mode 2 and Timer 0 mode 021 means Timer 1 mode 2 and Timer 0 mode 1timers will only get activate Ajay<contact@nospam.com> http://www.8051projects.net/forum-t10557.html Why to change TMOD value to 0x20? I am using TMOD 0x21 instead, please let me know what is the difference? say2paul<say2paul@nospam.com> http://www.8051projects.net/forum-t10557.html Hi Say2 paul,there is a lot of difference ! with TMOD as 20H(0x20), you are using timer1 in mode2 ( 8 bit) auto reload mode to generate baudrate and Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t10557.html say2paul wrote ...mmm a bit But I tried my code with both 20H and 21H and it is working fine with 9600 bps.So unable to find the difference hi say t pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t10557.html mmm a bit But I tried my code with both 20H and 21H and it is working fine with 9600 bps.So unable to find the difference say2paul<say2paul@nospam.com> http://www.8051projects.net/forum-t10557.html pdi33 wrote ...say2paul wrote ...mmm a bit But I tried my code with both 20H and 21H and it is working fine with 9600 bps.So unable to find the diffe say2paul<say2paul@nospam.com> http://www.8051projects.net/forum-t10557.html