[FIXED] STM32F103C8T6 USB problem

[part1zan_]

Not long ago I bought an STM32F103C8T6, and installed ChibiOS/RT on it. Nearly everything works fine (I used Olimex STM32P103 demo as a template for my project), but there's a problem with USB: on reset, it just hangs and doesn't react. Right there I asked a question about just the same thing, but with STM32F3Discovery. I was adviced to modify usb_lld_connect_bus and usb_lld_disconnect_bus. What should I do with usb_lld_connect_bus and usb_lld_disconnect_bus in this case to make it work?

[part1zan_]

I'm sorry, I have already fixed that. alexblack recommended me the right thing to do for all times . I just used that code:

Code: Select all

#define USB_GPIO_PORT GPIOA
#define USBDM_BIT 11
#define USBDP_BIT 12
void usb_lld_disconnect_bus(USBDriver *usbp)
{
   (void) usbp;
   palClearPort(USB_GPIO_PORT, (1<<USBDM_BIT) | (1<<USBDP_BIT));
   palSetPadMode(USB_GPIO_PORT, USBDM_BIT, PAL_MODE_OUTPUT_PUSHPULL);
   palSetPadMode(USB_GPIO_PORT, USBDP_BIT, PAL_MODE_OUTPUT_PUSHPULL);
}

void usb_lld_connect_bus(USBDriver *usbp)
{
   (void) usbp;
   palClearPort(USB_GPIO_PORT, (1<<USBDM_BIT) | (1<<USBDP_BIT));
   palSetPadMode(USB_GPIO_PORT, USBDM_BIT, PAL_MODE_INPUT);
   palSetPadMode(USB_GPIO_PORT, USBDM_BIT, PAL_MODE_INPUT);
}
<snip>
//somewhere in main subroutine
   usbDisconnectBus(serusbcfg.usbp);
   chThdSleepMilliseconds(500);
   usbConnectBus(serusbcfg.usbp);