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hid_device: lookup keycode in US keyboard table

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This commit is contained in:
Matthias Ringwald 2017-04-27 11:11:27 +02:00
parent 4cf728558f
commit ca44a803f1
1 changed files with 87 additions and 30 deletions
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117
example/hid_keyboard_demo.c
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@ -118,6 +118,58 @@ const uint8_t hid_descriptor_keyboard_boot_mode[] = {
0xc0, // End collection
};
//
#define CHAR_ILLEGAL 0xff
#define CHAR_RETURN '\n'
#define CHAR_ESCAPE 27
#define CHAR_TAB '\t'
#define CHAR_BACKSPACE 0x7f
// Simplified US Keyboard with Shift modifier
/**
* English (US)
*/
static const uint8_t keytable_us_none [] = {
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 0-3 */
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', /* 4-13 */
'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', /* 14-23 */
'u', 'v', 'w', 'x', 'y', 'z', /* 24-29 */
'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', /* 30-39 */
CHAR_RETURN, CHAR_ESCAPE, CHAR_BACKSPACE, CHAR_TAB, ' ', /* 40-44 */
'-', '=', '[', ']', '\\', CHAR_ILLEGAL, ';', '\'', 0x60, ',', /* 45-54 */
'.', '/', CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 55-60 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 61-64 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 65-68 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 69-72 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 73-76 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 77-80 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 81-84 */
'*', '-', '+', '\n', '1', '2', '3', '4', '5', /* 85-97 */
'6', '7', '8', '9', '0', '.', 0xa7, /* 97-100 */
};
static const uint8_t keytable_us_shift[] = {
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 0-3 */
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', /* 4-13 */
'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', /* 14-23 */
'U', 'V', 'W', 'X', 'Y', 'Z', /* 24-29 */
'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', /* 30-39 */
CHAR_RETURN, CHAR_ESCAPE, CHAR_BACKSPACE, CHAR_TAB, ' ', /* 40-44 */
'_', '+', '{', '}', '|', CHAR_ILLEGAL, ':', '"', 0x7E, '<', /* 45-54 */
'>', '?', CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 55-60 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 61-64 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 65-68 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 69-72 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 73-76 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 77-80 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 81-84 */
'*', '-', '+', '\n', '1', '2', '3', '4', '5', /* 85-97 */
'6', '7', '8', '9', '0', '.', 0xb1, /* 97-100 */
};
void hid_create_sdp_record(
uint8_t *service,
uint32_t service_record_handle,
@ -254,6 +306,33 @@ void hid_create_sdp_record(
de_add_number(service, DE_BOOL, DE_SIZE_8, hid_boot_device);
}
// HID Keyboard lookup
static int lookup_keycode(uint8_t character, const uint8_t * table, int size, uint8_t * keycode){
int i;
for (i=0;i<size;i++){
if (table[i] != character) continue;
*keycode = i;
return 1;
}
return 0;
}
static int keycode_and_modifer_us_for_character(uint8_t character, uint8_t * keycode, uint8_t * modifier){
int found;
found = lookup_keycode(character, keytable_us_none, sizeof(keytable_us_none), keycode);
if (found) {
*modifier = 0; // none
return 1;
}
found = lookup_keycode(character, keytable_us_shift, sizeof(keytable_us_shift), keycode);
if (found) {
*modifier = 2; // shift
return 1;
}
return 0;
}
// HID Report sending
static int send_keycode;
static int send_modifier;
@ -268,6 +347,8 @@ static void send_report(int modifier, int keycode){
l2cap_send(hid_interrupt_cid, &report[0], sizeof(report));
}
#ifdef HAVE_POSIX_STDIN
// prototypes
@ -289,39 +370,15 @@ static void stdin_process(btstack_data_source_t *ds, btstack_data_source_callbac
UNUSED(ds);
UNUSED(callback_type);
char cmd = btstack_stdin_read();
// switch (cmd){
// default:
// show_usage();
// break;
// }
char character = btstack_stdin_read();
// naive translation
if (cmd >= 'a' && cmd <= 'z'){
send_key(0, cmd - 'a' + 0x04);
uint8_t modifier;
uint8_t keycode;
int found = keycode_and_modifer_us_for_character(character, &keycode, &modifier);
if (found){
send_key(modifier, keycode);
return;
}
if (cmd >= 'A' && cmd <= 'Z'){
send_key(2, cmd - 'A' + 0x04);
return;
}
if (cmd == '0'){
send_key(0, 0x27);
return;
}
if (cmd == 127){
send_key(0, 0x2a);
return;
}
if (cmd == ' '){
send_key(0, 0x2c);
return;
}
if (cmd >= '1' && cmd <= '9'){
send_key(0, cmd - '1' + 0x1e);
return;
}
show_usage();
}
#endif