Posted on May 20, 2014 at 11:14
I'm developing a HID application on STM32F I use ST's HID example application. I just changed usb descriptors for my application. But this is not related with that.
I initialized all things in the same order with example. Changed pull up pin with mine.
I succesfully received data from PC.
But I tried to run again, I always stuck in ISR. When I debug below code, I get wIstr = Decimal 8448 (Hex 0x2100). It is not any flag or something. Why this happen? So there is no clear function about this value, application always runs into interrupt.
Additional info:
When I connect PC, it does not recognize. So I work when cable is not plugged.
in debug, deviceState value is : ATTACHED
void
USB_Istr(
void
)
{
uint32_t i=0;
__IO uint32_t EP[8];
wIstr = _GetISTR();
#stm32-usb
