Changing Arduino Leonardo USB Configuration Power

[awround]

I am trying to have my Leonard HID Joystick report its maximum current requirement as 100ma. I have looked at previous posts/forums that suggest editing the USBCore.h file as a solution.

My attempts to change the values in the header file do not seem to have any effect. The device continues to report as a 500ma device.

Any suggestions would be greatly appreciated.

Cheers,

Adrian

[Icebuster]

This change does it for me.

diff --git a/hardware/arduino/avr/cores/arduino/USBCore.h b/hardware/arduino/avr/cores/arduino/USBCore.h
index 0c63c2b..4176d87 100644
--- a/hardware/arduino/avr/cores/arduino/USBCore.h
+++ b/hardware/arduino/avr/cores/arduino/USBCore.h
@@ -270,7 +270,7 @@ typedef struct
 	{ 18, 1, USB_VERSION, _class,_subClass,_proto,_packetSize0,_vid,_pid,_version,_im,_ip,_is,_configs }
 
 #define D_CONFIG(_totalLength,_interfaces) \
-	{ 9, 2, _totalLength,_interfaces, 1, 0, USB_CONFIG_BUS_POWERED | USB_CONFIG_REMOTE_WAKEUP, USB_CONFIG_POWER_MA(USB_CONFIG_POWER) }
+	{ 9, 2, _totalLength,_interfaces, 1, 0, USB_CONFIG_BUS_POWERED | USB_CONFIG_REMOTE_WAKEUP, USB_CONFIG_POWER_MA(100) }
 
 #define D_INTERFACE(_n,_numEndpoints,_class,_subClass,_protocol) \
 	{ 9, 4, _n, 0, _numEndpoints, _class,_subClass, _protocol, 0 }

[awround]

Thanks. That confirms I was on the right track.

I had made the changes in 1.8.19 but it still reported as a 500ma device.

This morning, I downloaded the new IDE, made the change to USBCore.h and it worked!

Cheers,

Adrian