Changes in USB keyboard support on Teensy 2.0

[makegeneve]

Hi,

I'm trying to tweak some code written five years ago for the Teensy 2.0. Back then, KEYCODE_TYPE and the KEY_xxx codes were an unsigned chars, and the code worked fine.

Now, with the changes to enable media keys on Teensy 2.0, the KEY_xxx keys are either unsigned char or unsigned int (for unicode) and I cannot see what I have to define to make it unsigned char. It is defaulting to unsigned int (for unicode) rather than unsigned chart (for ASCII).

I just want to compile my code and make an unrelated tweak (this code is reading an Infra-red remote control and generating USB keyboard keypresses).

Does anyone know how I can ask the USB keyboard support to either make KEYCODE_TYPE be a 16 bit int or that the KEY_xxx codes generate an 8 bit char?

Thanks,

Paul

 

[makegeneve]

Code is trivially simple:

typedef struct
{
unsigned char ir_code;
KEYCODE_TYPE keyboard_code;
KEYCODE_TYPE keyboard_modifier;
} keyboard_entry_t;

keyboard_entry_t nec_key_translation[] = {
{ 0x15, KEY_ENTER, 0 }, /*OK*/
{ 0x1B, KEY_LEFT, 0 }, /*LEFT*/
{ 0x1C, KEY_RIGHT, 0 }, /*RIGHT*/
{ 0x0B, KEY_UP, 0 }, /*UP*/

and the error is (repeated umpteen times for all the keys):

IR_Keyboard:114: error: narrowing conversion of '61480' from 'unsigned int' to 'uint8_t {aka unsigned char}' inside { } [-Wnarrowing]
};

 

[makegeneve]

So it looks like KEYBOARD_TYPE is being defined somewhere as 8 bit, but the KEY_xxx codes are generating 16 bit values...

I'm running the latest teensyduino and Arduino 1.8.10

 

[makegeneve]

I suppose I could make it compile by simply changing the struct to use unsigned int instead of KEYCODE_TYPE but that feels like the sort of hack that will bite me later.

 

[makegeneve]

Finally made it compile by setting the Keyboard Layout to "US International" instead of "US English"