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root / lab4 / mouse.c @ 64

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#include <lcom/lcf.h>
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#include "mouse.h"
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#include "errors.h"
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#include "kbc_macros.h"
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#include "mouse_macros.h"
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#include "kbc.h"
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int (subscribe_mouse_interrupt)(uint8_t interrupt_bit, int *interrupt_id) {
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    if (interrupt_id == NULL) return NULL_PTR;
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    *interrupt_id = interrupt_bit;
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    if (sys_irqsetpolicy(MOUSE_IRQ, IRQ_REENABLE | IRQ_EXCLUSIVE, interrupt_id)) return SBCR_ERROR;
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    return SUCCESS;
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}
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int got_error_mouse_ih = 0;
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uint8_t packet[3];
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int counter = 0;
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void (mouse_ih)(void) {
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    uint8_t status = 0;
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    got_error_mouse_ih = 0;
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    if(counter >= 3) counter = 0;
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    if (util_sys_inb(STATUS_REG, &status)) {
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        got_error_mouse_ih = 1;
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        return;
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    }
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    if (status & (TIME_OUT_REC | PARITY_ERROR)) {
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        got_error_mouse_ih = 1;
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        return;
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    }
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    uint8_t byte = 0;
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    if (util_sys_inb(OUTPUT_BUF, &byte)) {
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        got_error_mouse_ih = 1;
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        return;
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    }
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    /// 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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    if((byte & FIRST_BYTE_ID)  || counter){
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        packet[counter] = byte;
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        counter++;
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    }
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}
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struct packet (mouse_parse_packet)(const uint8_t *packet_bytes){
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    struct packet pp;
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    pp.bytes[0] = packet_bytes[0];
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    pp.bytes[1] = packet_bytes[1];
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    pp.bytes[2] = packet_bytes[2];
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    pp.rb       = pp.bytes[0] & RIGHT_BUTTON;
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    pp.mb       = pp.bytes[0] & MIDDLE_BUTTON;
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    pp.lb       = pp.bytes[0] & LEFT_BUTTON;
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    pp.delta_x  = pp.bytes[1];
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    pp.delta_y  = pp.bytes[2];
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    pp.x_ov     = pp.bytes[0] & X_OVERFLOW;
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    pp.y_ov     = pp.bytes[0] & Y_OVERFLOW;
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    return pp;
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}
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int (mouse_set_data_report)(int on){
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    int ret = 0;
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    if((ret = kbc_issue_cmd(MOUSE_WRITE_B))) return ret;
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    if(sys_outb(KBC_CMD_ARG, DIS_DATA_REP)) return WRITE_ERROR;
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    return SUCCESS;
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}