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Fixed handling of ADB event with key down and key up for same key all in one
keymap_in_eeprom
Shay Green
10 years ago
1 changed files with 17 additions and 3 deletions
+ 17
- 3
converter/adb_usb/matrix.c
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| uint8_t matrix_scan(void) | uint8_t matrix_scan(void) | ||||
| { | { | ||||
| /* extra_key is volatile and more convoluted than necessary because gcc refused | |||||
| to generate valid code otherwise. Making extra_key uint8_t and constructing codes | |||||
| here via codes = extra_key<<8 | 0xFF; would consistently fail to even LOAD | |||||
| extra_key from memory, and leave garbage in the high byte of codes. I tried | |||||
| dozens of code variations and it kept generating broken assembly output. So | |||||
| beware if attempting to make extra_key code more logical and efficient. */ | |||||
| static volatile uint16_t extra_key = 0xFFFF; | |||||
| uint16_t codes; | uint16_t codes; | ||||
| uint8_t key0, key1; | uint8_t key0, key1; | ||||
| is_modified = false; | is_modified = false; | ||||
| _delay_ms(12); // delay for preventing overload of poor ADB keyboard controller | |||||
| codes = adb_host_kbd_recv(); | |||||
| codes = extra_key; | |||||
| extra_key = 0xFFFF; | |||||
| if ( codes == 0xFFFF ) | |||||
| { | |||||
| _delay_ms(12); // delay for preventing overload of poor ADB keyboard controller | |||||
| codes = adb_host_kbd_recv(); | |||||
| } | |||||
| key0 = codes>>8; | key0 = codes>>8; | ||||
| key1 = codes&0xFF; | key1 = codes&0xFF; | ||||
| } else { | } else { | ||||
| register_key(key0); | register_key(key0); | ||||
| if (key1 != 0xFF) // key1 is 0xFF when no second key. | if (key1 != 0xFF) // key1 is 0xFF when no second key. | ||||
| register_key(key1); | |||||
| extra_key = key1<<8 | 0xFF; // process in a separate call | |||||
| } | } | ||||
| return 1; | return 1; |