root / lab4 / mouse.c @ 76
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| 1 | 59 | up20180642 | #include <lcom/lcf.h> |
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| 2 | |||
| 3 | #include "mouse.h" |
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| 4 | |||
| 5 | #include "errors.h" |
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| 6 | #include "kbc_macros.h" |
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| 7 | #include "mouse_macros.h" |
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| 8 | #include "kbc.h" |
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| 9 | |||
| 10 | int (subscribe_mouse_interrupt)(uint8_t interrupt_bit, int *interrupt_id) { |
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| 11 | if (interrupt_id == NULL) return NULL_PTR; |
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| 12 | *interrupt_id = interrupt_bit; |
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| 13 | if (sys_irqsetpolicy(MOUSE_IRQ, IRQ_REENABLE | IRQ_EXCLUSIVE, interrupt_id)) return SBCR_ERROR; |
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| 14 | return SUCCESS;
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| 15 | } |
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| 16 | |||
| 17 | int got_error_mouse_ih = 0; |
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| 18 | uint8_t packet[3];
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| 19 | int counter = 0; |
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| 20 | |||
| 21 | void (mouse_ih)(void) { |
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| 22 | uint8_t status = 0;
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| 23 | got_error_mouse_ih = 0;
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| 24 | if(counter >= 3) counter = 0; |
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| 25 | |||
| 26 | 68 | up20180642 | if ((got_error_mouse_ih = util_sys_inb(STATUS_REG, &status))) return; |
| 27 | 59 | up20180642 | |
| 28 | if (status & (TIME_OUT_REC | PARITY_ERROR)) {
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| 29 | 68 | up20180642 | got_error_mouse_ih = OTHER_ERROR; |
| 30 | 59 | up20180642 | return;
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| 31 | } |
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| 32 | 76 | up20180655 | if (((status & AUX_MOUSE) == 0) || ((status & OUT_BUF_FUL) == 0)) { |
| 33 | got_error_mouse_ih = OTHER_ERROR; |
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| 34 | return;
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| 35 | } |
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| 36 | 59 | up20180642 | |
| 37 | uint8_t byte = 0;
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| 38 | |||
| 39 | 68 | up20180642 | if ((got_error_mouse_ih = util_sys_inb(OUTPUT_BUF, &byte))) return; |
| 40 | 59 | up20180642 | |
| 41 | /// This does not run if: I was expecting the first one but what I get is definitely not the first byte
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| 42 | if((byte & FIRST_BYTE_ID) || counter){
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| 43 | packet[counter] = byte; |
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| 44 | counter++; |
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| 45 | } |
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| 46 | } |
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| 47 | |||
| 48 | struct packet (mouse_parse_packet)(const uint8_t *packet_bytes){ |
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| 49 | struct packet pp;
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| 50 | pp.bytes[0] = packet_bytes[0]; |
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| 51 | pp.bytes[1] = packet_bytes[1]; |
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| 52 | pp.bytes[2] = packet_bytes[2]; |
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| 53 | pp.rb = pp.bytes[0] & RIGHT_BUTTON;
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| 54 | pp.mb = pp.bytes[0] & MIDDLE_BUTTON;
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| 55 | pp.lb = pp.bytes[0] & LEFT_BUTTON;
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| 56 | 71 | up20180655 | pp.delta_x = sign_extend_byte((packet_bytes[0] & MSB_X_DELTA) != 0, pp.bytes[1]); |
| 57 | pp.delta_y = sign_extend_byte((packet_bytes[0] & MSB_Y_DELTA) != 0, pp.bytes[2]); |
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| 58 | 59 | up20180642 | pp.x_ov = pp.bytes[0] & X_OVERFLOW;
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| 59 | pp.y_ov = pp.bytes[0] & Y_OVERFLOW;
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| 60 | return pp;
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| 61 | } |
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| 62 | |||
| 63 | int (mouse_set_data_report)(int on){ |
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| 64 | 73 | up20180642 | if(on) return mouse_issue_cmd(ENABLE_DATA_REP); |
| 65 | else return mouse_issue_cmd( DIS_DATA_REP); |
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| 66 | 59 | up20180642 | } |
| 67 | 70 | up20180655 | |
| 68 | int (mouse_read_data)(uint8_t *data) {
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| 69 | int ret;
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| 70 | if ((ret = mouse_issue_cmd(READ_DATA))) return ret; |
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| 71 | if ((ret = mouse_read_byte(data))) return ret; |
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| 72 | return SUCCESS;
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| 73 | } |
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| 74 | |||
| 75 | int (mouse_issue_cmd)(uint32_t cmd) {
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| 76 | int ret;
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| 77 | uint8_t ack = 0;
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| 78 | 72 | up20180642 | for(unsigned i = 0; i < KBC_NUM_TRIES; ++i) { |
| 79 | 70 | up20180655 | if ((ret = kbc_issue_cmd(MOUSE_WRITE_B))) return ret; |
| 80 | if ((ret = kbc_issue_arg(cmd))) return ret; |
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| 81 | if ((ret = mouse_read_byte(&ack))) return ret; |
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| 82 | if (ack == ACK_OK) return SUCCESS; |
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| 83 | 72 | up20180642 | if (ack == ACK_ERROR) return INVALID_COMMAND; |
| 84 | 70 | up20180655 | tickdelay(micros_to_ticks(DELAY)); |
| 85 | } |
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| 86 | 72 | up20180642 | return TIMEOUT_ERROR;
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| 87 | 70 | up20180655 | } |
| 88 | |||
| 89 | int (mouse_read_byte)(uint8_t *byte) {
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| 90 | int ret = 0; |
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| 91 | uint8_t stat; |
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| 92 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
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| 93 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
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| 94 | if((stat&OUT_BUF_FUL) && (stat&AUX_MOUSE)) {
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| 95 | if(stat & (PARITY_ERROR | TIME_OUT_REC)) return OTHER_ERROR; |
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| 96 | if((ret = util_sys_inb(OUTPUT_BUF, byte))) return ret; |
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| 97 | else return SUCCESS; |
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| 98 | } |
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| 99 | tickdelay(micros_to_ticks(DELAY)); |
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| 100 | } |
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| 101 | return TIMEOUT_ERROR;
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| 102 | } |
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| 103 | 71 | up20180655 | |
| 104 | int16_t (sign_extend_byte)(uint8_t sign_bit, uint8_t byte) {
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| 105 | return (int16_t)(((0xFF * sign_bit)<<8) | byte); |
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| 106 | } |