USB implementation help please

michel239955_st · ‎2008-06-13

Posted on June 13, 2008 at 20:36

michel239955_st · ‎2011-05-17

Posted on May 17, 2011 at 09:53

Hi, I have a sofware running in STR9 (STR912FW44XB). I need to install a command system via usb. The mcu receive ascii command and generate action acording to them). I download the DFU_bootloader but i still don't know how to start. Can someone resume me the step to get it work. An example will be also greatly apreciate.

Thank you for your help

Michel

rgreenthal · ‎2011-05-17

Posted on May 17, 2011 at 09:53

Don't forget if you get a HW Reset that isn't from the Power on Reset you need to

// ************************************************

// A system reset does not reset the USB registers.

// ************************************************

_SetCNTR(0x0003);

_SetISTR(0x0000);

_SetDADDR(0x0000);

_SetBTABLE(0x0000);