New ID-10-T on a Wixel using SDK test_hid

Support Wixel
1

Wixel running “test_hid” sample code from SDK. At first I noticed it was returning only lower case alpha characters.
I first tried changing the "hello world " to mixed case i.e. "Hello World " with no luck.
I then tried to test more letters by following comments in line 190 of test_hid.c
i.e.

Sending:

!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~

and
Receiving:

1'3457'908=,-./0123456789;;,=./ 3abcdefghijklmnopqrstuvwxyz[\]6- `abcdefghijklmnopqrstuvwxyz[\]`

Holding the “Shift” key while bringing PO_2 low yields:

!"#$%&"()*+<_>?)!@#$%^&*(::<+>? #ABCDEFGHIJKLMNOPQRSTUVWXYZ{|}^_ ~ABCDEFGHIJKLMNOPQRSTUVWXYZ{|}~

So does this mean all ASCII being transmitted is sent via ‘tolower’ or is there a simple way to send mixed case strings?

p.s. Still playing with my Wixel(s) & loving it.

2

Hello. Sending capital letters is harder than sending lower-case because you have to virtually press the shift key to do it. It is possible to do that using the Wixel’s HID library, but the particular test code you are looking at does not implement that feature.

–David

3

Can you point me to sample code that uses the proper coding to send mixed case as a keyboard?
Just a Hello World would be a great start.

Thanks for your prompt answer above.

4

Actually yes, I did get that to work. Here is some code I used:

#include <wixel.h>
#include <usb.h>
#include <usb_hid.h>

uint8 lastKeyCodeSent = 0;
BIT sending = 0;
char XDATA * nextCharToSend;
BIT started = 0;

uint8 CODE str[] = "Hello World";

void updateLeds()
{
    usbShowStatusWithGreenLed();

    LED_YELLOW(!sending);
    LED_RED(sending);
}

uint8 usbHidModifiersFromAsciiChar(char c)
{
	if ( (c >= 0x21 && c <= 0x26) ||
		     (c >= 0x28 && c <= 0x2B) ||
		     (c == ':') ||
		     (c == '<') ||
		     (c >= 0x3E && c <= 0x5A) ||
		     (c >= 0x5E && c <= 0x5F) ||
		     (c == '|') ||
		     (c == '~')
	   )
	{
		return (1<<MODIFIER_SHIFT_LEFT);
	}
	else
	{
		return 0;
	}
}

// See keyboardService for an example of how to use this function correctly.
// Assumption: usbHidKeyboardInputUpdated == 0.  Otherwise, this function
// could clobber a keycode sitting in the buffer that has not been sent to
// the computer yet.
// Assumption: usbHidKeyBoardInput[1 through 5] are all zero.
// Assumption: usbHidKeyboardInput.modifiers is 0.
// NOTE: To send two identical characters, you must send a 0 in between.
void sendKeyCode(uint8 keyCode, uint8 modifiers)
{
    lastKeyCodeSent = keyCode;
    usbHidKeyboardInput.keyCodes[0] = keyCode;
    usbHidKeyboardInput.modifiers = modifiers;

    // Tell the HID library to send the new keyboard state to the computer.
    usbHidKeyboardInputUpdated = 1;
}

void keyboardService()
{
    if (getMs() >= 5000 && !started && !sending)
    {
    	started = 1;
    	sending = 1;
    	nextCharToSend = (char XDATA *)str;
    }

    // Feed data to the HID library, one character at a time.
    if (sending && !usbHidKeyboardInputUpdated)
    {
    	uint8 nextChar = *nextCharToSend;
    	if (nextChar == 0)
    	{
    		sending = 0;
    	}
    	else
    	{
    		uint8 keyCode = usbHidKeyCodeFromAsciiChar(*nextCharToSend);
    		uint8 nextChar = *nextCharToSend;

    		if (keyCode != 0 && keyCode == lastKeyCodeSent)
    		{
    			// If we need to send the same character twice in a row,
    			// send a 0 between them so the compute registers it as
    			// two different separate key strokes.
    			keyCode = 0;
    		}
    		else
    		{
    			nextCharToSend++;
    		}

    		sendKeyCode(keyCode, usbHidModifiersFromAsciiChar(nextChar));
    	}
    }

    // Send a 0 to signal the release of the last key.
    if (!sending && lastKeyCodeSent != 0 && !usbHidKeyboardInputUpdated)
    {
        sendKeyCode(0, 0);
    }
}

void main()
{
    systemInit();
    usbInit();

    while(1)
    {
        updateLeds();
        boardService();
        usbHidService();
        keyboardService();
    }
}

–David

5

Thank you very much, sir.

You da man!

Exactly what I was looking for. :stuck_out_tongue: