ChibiOS Free Embedded RTOS

Posted: **Mon Feb 22, 2016 6:52 pm**

Hello!

I have been using the serialusbdriver on my stm32f4 in conjunction with the chprintf functionality. It has been working fine when i was on the stable_3.0 branch.

Now when i am using the same code, the usb is sending unevenly, it now only sends data over the USB in chunks of ~250 bytes.

This is happening even if i skip the chprintf and use:

Code: Select all

chSequentialStreamWrite(&SDU1,"sometext",8);

as well.

Is there anything i need to change between 3.0 and 16.1 to use the SerialUSBDriver?

Posted: **Mon Feb 22, 2016 10:19 pm**

Look at the demos, there is one more function to call from the periodic callback: usbcfg.c.

Code: Select all

static void sof_handler(USBDriver *usbp) {

  (void)usbp;

  osalSysLockFromISR();
  sduSOFHookI(&SDU1);
  osalSysUnlockFromISR();
}

/*
 * USB driver configuration.
 */
const USBConfig usbcfg = {
  usb_event,
  get_descriptor,
  sduRequestsHook,
  sof_handler /* THIS IS NEW */
};

Giovanni

Posted: **Tue Feb 23, 2016 4:11 pm**

Now everything works as it did before again, thank you!

ChibiOS Free Embedded RTOS

Usb serial bursting data since move to 16.1

Usb serial bursting data since move to 16.1

Re: Usb serial bursting data since move to 16.1

Re: Usb serial bursting data since move to 16.1