Microcontroller › 8051 › laptop has no db9 pin
- This topic has 8 replies, 3 voices, and was last updated 10 years, 9 months ago by ritesh.
August 14, 2012 at 3:53 pm #1911
laptop not include db9 pin i use usb db9 cable for my p89v51rd2 loader.
using usb to db9 its not work
any other pin solution for load program.
can any other pin use for load program like rj45 … something…
thanks….August 14, 2012 at 6:19 pm #8460AJISH ALFREDParticipant
Have you installed the proper usb driver for the device?
Have your usb device got listed in the detected device list in device manager?
Have you selected the same usb port for burning?
Have you set the controller in programming mode?
Please check them.August 14, 2012 at 6:22 pm #8461AJISH ALFREDParticipant
If your laptop don’t have serial port and parallel port, then I thing you are left with only USB port for burning your code.August 15, 2012 at 3:24 am #8464
by using pc i load program successfully. (via db9 pin in pc)
but when i use usb db9 cable (my os is windows 7) i click on start button in flash magic the message display “reset the device into isp mode” after this msg i press reset switch then nothing happen.
or i press reset switch and after i click on start button then msg display after this i realise reset switch nothing happen.
what should i do?
thanks.August 15, 2012 at 6:07 pm #8467chitraParticipant
1> to use usb to serial cable u should download proper driver for ur o.s.
i had same prob once,then i used s/w from BAFO.now its working fine.
2>while using flash magic,check option COM port in 1st step.that should be the same of usb-serial com port.ok.
now check proper device.( like P89V51RD2 ) .again if its not working c if sw of power supply( of 5 volt on interfacing card ) is on.make that OFF.load hex file in flash magic.now it will show msg ‘set device in isp mode’, now make that sw ON.n u’l program ic. ( or even that p.s. sw is ON. u can dung hex code while pressing reset key on card )August 16, 2012 at 2:51 am #8469
i tried all type of method .
i use bafo 810 usb to db9 cable.
can u give me the your driver for cable.
my mail id is
or u can give me link for proper driver download.
can u give me ur mail id so i can direct contect with u.August 16, 2012 at 3:01 am #8470
chitra u r right,
i tried all of this method ,
but i have no solution i use BAFO 810 cable.
my os is windows 7.
can u give ur driver link so can i download proper driver.
i tried more then 20 different driver. bt same problem.
so can u give me your direct contect no. i need ur help.
thanks.August 16, 2012 at 8:59 am #8471chitraParticipant
hey, i didnt got dat s/w from internate.my frd givn dat me.but my o.s is diff…i think u shold use usb to serial card if u r not getting s/w compatible to ur o.s…or u should change o.s………don’t u think u should use resent o.s????
n i heard that these drivers gives problem to windows vista/windows 7..also these are costly for these o.s.so its better to follow above mention choices…August 16, 2012 at 4:42 pm #8474
my os is windows 7
what is usb to serial card?
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