Revision 39
fixed frozen keyboard
| kbc.c | ||
|---|---|---|
| 66 | 66 |
int (kbd_poll)(uint8_t bytes[], uint8_t *size){
|
| 67 | 67 |
if(bytes == NULL || size == NULL) return 1; |
| 68 | 68 |
uint8_t c; |
| 69 |
if(kbd_read_byte(&c)) return 1;
|
|
| 69 |
if(kbc_read_byte(&c)) return 1;
|
|
| 70 | 70 |
if(c == TWO_BYTE_CODE){
|
| 71 |
if(kbd_read_byte(&bytes[0])) return 1;
|
|
| 71 |
if(kbc_read_byte(&bytes[0])) return 1;
|
|
| 72 | 72 |
bytes[1] = c; |
| 73 | 73 |
*size = 2; |
| 74 | 74 |
}else{
|
| ... | ... | |
| 79 | 79 |
return 0; |
| 80 | 80 |
} |
| 81 | 81 |
|
| 82 |
int (kbd_issue_cmd)(uint8_t cmd){
|
|
| 82 |
int (kbc_read_cmd)(uint8_t *cmd){
|
|
| 83 |
if(kbc_issue_cmd(READ_KBC_CMD)) return 1; |
|
| 84 |
if(kbc_read_byte(cmd)) return 1; |
|
| 85 |
return 0; |
|
| 86 |
} |
|
| 87 |
|
|
| 88 |
int (kbc_change_cmd)(uint8_t cmd){
|
|
| 89 |
if(kbc_issue_cmd(WRITE_KBC_CMD)) return 1; |
|
| 90 |
if(sys_outb(KBC_CMD_ARG, cmd)) return 1; |
|
| 91 |
return 0; |
|
| 92 |
} |
|
| 93 |
|
|
| 94 |
int (kbc_issue_cmd)(uint8_t cmd){
|
|
| 83 | 95 |
uint8_t stat; |
| 84 |
for(int i = 0; i < 10; ++i){
|
|
| 96 |
while(1){
|
|
| 85 | 97 |
if(util_sys_inb(STATUS_REG, &stat)) return 1; |
| 86 | 98 |
if((stat&IN_BUF_FULL) == 0){
|
| 87 | 99 |
if(sys_outb(KBC_CMD, cmd)) return 1; |
| ... | ... | |
| 92 | 104 |
return 1; |
| 93 | 105 |
} |
| 94 | 106 |
|
| 95 |
int (kbd_read_byte)(uint8_t *byte){
|
|
| 107 |
int (kbc_read_byte)(uint8_t *byte){
|
|
| 96 | 108 |
uint8_t stat; |
| 97 | 109 |
while(true){
|
| 98 | 110 |
if(util_sys_inb(STATUS_REG, &stat)) return 1; |
| ... | ... | |
| 104 | 116 |
tickdelay(micros_to_ticks(DELAY)); |
| 105 | 117 |
} |
| 106 | 118 |
} |
| 107 |
|
|
| 108 |
int (kbd_read_cmd)(uint8_t *cmd){
|
|
| 109 |
if(kbd_issue_cmd(0x20)) return 1; |
|
| 110 |
if(kbd_read_byte(cmd)) return 1; |
|
| 111 |
return 0; |
|
| 112 |
} |
|
Also available in: Unified diff