Keyboard-Scancodes for german keyboards

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9

Hi agmue,

the codes that must be sended over BLE are different.

The keyboard-emulation uses an array of a struct that contains the keycodes and the modifiers

typedef struct {
	unsigned char usage;  // keycode
	unsigned char modifier;
} KEYMAP;

In the meantime I found the BLE-codes and key-modifiers for all characters with ASCII-Code-values below 127.

for a string that only contains characters below ASCII-code 127
For those characters it is sufficient to do a typecasting

    uint8_t val = (uint8_t)text[i];

The typecast delivers the ASCII-code.
And the ASCII-code equals to the index-number in the array of struct KEYMAP.
This way works a lookup in an array of struct with all the keycodes and the (key)modifiers.

#define KEYMAP_SIZE (123)
const KEYMAP keymap[KEYMAP_SIZE] = {
   {0x00, 0 }, /* 0  */
// ...   shortened for better overview
{0x1E, KEY_SHIFT }, /* 33   !  */
   {0x0 , 0 }, /* 34  */
   {0x31, 0 }, /* 35   #  */
   {0x21, KEY_SHIFT }, /* 36   $  */
   {0x22, KEY_SHIFT }, /* 37   %  */
   {0x23, KEY_SHIFT }, /* 38   &  */
   {0x31, KEY_SHIFT }, /* 39   '  */
//....

Now the characters "äöü ÄÖÜ ² ³ €" are represented by multibyte values.
This means a simple typecast to uint8_t does not work.

analysing the values beeing above or below 126 and then execute different code for retrieving the correct keycodes and modifiers is easy

But I have no idea yet how to determine the BLE-keycodes for these characters "äöü ÄÖÜ ² ³ €",
best regards Stefan