bulk usb/ serial_usb
Posted: Thu May 07, 2015 9:52 pm
I was interested in creating a bulk usb device (not full serial) and started with the examples in :
https://github.com/fpoussin/ChibiOS-Examples
In the process, I noticed that the only thing preventing me from simply using serial_usb was the assumption in
sduStart and sduStop that the interrupt endpoint be > 0. I made the following changes:
in sduStart:
if (config->int_in > 0)
usbp->in_params[config->int_in - 1U] = sdup;
in sduStop:
if (sdup->config->int_in > 0)
usbp->in_params[sdup->config->int_in - 1U] = NULL;
Now to create a bulk device, I initialize a serial_usb device without the interrupt endpoint. Of course, the usb device descriptor needs to change as well.
It seems this might be a generally useful tweak to the serial_usb device.
Geoffrey
https://github.com/fpoussin/ChibiOS-Examples
In the process, I noticed that the only thing preventing me from simply using serial_usb was the assumption in
sduStart and sduStop that the interrupt endpoint be > 0. I made the following changes:
in sduStart:
if (config->int_in > 0)
usbp->in_params[config->int_in - 1U] = sdup;
in sduStop:
if (sdup->config->int_in > 0)
usbp->in_params[sdup->config->int_in - 1U] = NULL;
Now to create a bulk device, I initialize a serial_usb device without the interrupt endpoint. Of course, the usb device descriptor needs to change as well.
It seems this might be a generally useful tweak to the serial_usb device.
Geoffrey