Tom H

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9 years, 7 months ago.

Program not looping

Hi

When I run this program it detects the note activity of my USB connected MIDI keyboard, but then when it loops it seems to crash out. I can't find anything to work out why it happens.

This is my serial output. You can see that it rediscovers the USB device but then stops and I've no idea what that last line means:

parent:00000000 port:0 speed:full VID:0763 PID:0195 class:00 addr:1 New MIDI device: VID:0763 PID:0195 [dev: 1ffff6b8 - intf: 1] note on channel: 0, note: 60, velocity: 75 on end New MIDI device: VID:0763 PID:0195 [dev: 1ffff6b8 - intf: 1]

/src/F401RE-USBHost/USBHost/USBHALHost_KL46Z.cpp@314 ep->getState() != USB_TYPE_PROCESSING ASSERT!

Question relating to:

Last updated: 18 Sep 2014
My porting of USBHostMIDI library Example. F401RE, MIDI, Nucleo, USB, USBHOST

I am running this on a Freescale frdm-kl25z

posted by Tom H 26 Sep 2014

I think we must be able to get it to work as it initially detected the device and it's midi input. I will keep trying and let you know if it works!

posted by Tom H 29 Sep 2014

1 Answer

Takuya Urakawa
9 years, 7 months ago.

Hi Tom

I'm developing on nucleoF401RE. but I have kl25z, so I will check it soon.

You can see that it rediscovers the USB device but then stops and I've no idea what that last line means:

Did you reconnect MIDI device physically? If you want do it, please reset MCU after USB device connect.

Hi Takuya

When I reboot the Freescale board it works again, but only for one note press, then freezes again.

Removing and reconnecting the MIDI keyboard does not work though, stays frozen.

Thanks!

Tom

posted by Tom H 26 Sep 2014

Hi Tom

My KL25z board is Rev.D. this rev is not suitable for USB-HOST hack please wait I get new board.

Perhaps it is caused by original library, fix it is so difficult and take a lot of time. https://mbed.org/users/va009039/code/F401RE-USBHost/

Simplest solution is you get nucleo-F401 boards(extremely cheap!!!!!) or LPC1768 :)

Thanks.

Takuya

posted by Takuya Urakawa 26 Sep 2014

Hi Takuya

Thanks for the information. My board I think is Rev A, is that okay?

Those boards look good, thing is I'm wanting to use the low cost MKL25Z128VLK4 MCU which would have been ideal.

Ideally I need UART, USB host and BLE in an easy to program way. So I was thinking MKL25Z128VLK4 + nRF8001 and learn how to do it.

Other option is USB host chip + ATmega + nRF8001

or USB host chip + nrf51822. But I think I may struggle to program the nrf51822 to do everything.

I want to take MIDI signals from USB device and send them over BLE

posted by Tom H 26 Sep 2014

I think we must be able to get it to work as it initially detected the device and it's midi input. I will keep trying and let you know if it works!

posted by Tom H 29 Sep 2014

Hi Tom.

USB device over BLE

It is so cool! I think mbed HRM1017 + USB host chip is easiest way. It is mbed compatible!!!(my friend developed)

By the way, I updated USBhostMIDI library fixed freeze bug in the USB 1st polling. But I have not get a new KL25z board. Perhaps this is no connection with the bug. Please update to new library. thanks.

Takuya

posted by Takuya Urakawa 13 Oct 2014