root / proj / src / rtc.c @ 250
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#include "rtc.h" |
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#include "rtc_macros.h" |
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#include <lcom/lcf.h> |
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#include "utils.h" |
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#include "errors.h" |
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int (subscribe_rtc_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(KBC_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 (rtc_read_register)(uint32_t reg, uint8_t *data) {
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if (sys_outb(RTC_ADDR_REG, reg)) return WRITE_ERROR; |
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if (util_sys_inb(RTC_DATA_REG, data)) return READ_ERROR; |
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return SUCCESS;
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} |
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int (rtc_write_register)(uint32_t reg, uint8_t data) {
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if (sys_outb(RTC_ADDR_REG, reg)) return WRITE_ERROR; |
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if (sys_outb(RTC_DATA_REG, data)) return WRITE_ERROR; |
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return SUCCESS;
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} |
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int (rtc_check_update)(void) { |
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uint8_t data; |
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int r;
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if ((r = rtc_read_register(RTC_REG_A, &data))) return r; |
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return (data & UIP) != 0; |
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} |
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int (rtc_set_updates)(int on) { |
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uint8_t data; |
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int r;
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if (on) {
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if ((r = rtc_read_register(RTC_REG_B, &data))) return r; |
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data &= ~SET; |
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if ((r = rtc_write_register(RTC_REG_B, data))) return r; |
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} else {
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while (rtc_check_update());
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if ((r = rtc_read_register(RTC_REG_B, &data))) return r; |
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data |= SET; |
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if ((r = rtc_write_register(RTC_REG_B, data))) return r; |
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} |
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return SUCCESS;
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} |
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int (rtc_read_time)(uint8_t *time) {
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int r;
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//if ((r = rtc_set_updates(false))) return r;
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while (rtc_check_update());
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uint8_t hour, min, sec; |
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if ((r = rtc_read_register(RTC_SEC, &sec))) return r; |
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if ((r = rtc_read_register(RTC_MIN, &min))) return r; |
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if ((r = rtc_read_register(RTC_HOUR, &hour))) return r; |
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//if ((r = rtc_set_updates(true))) return r;
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time[0] = BCD_FIRST(sec)*10 + BCD_SECOND(sec); |
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time[1] = BCD_FIRST(min)*10 + BCD_SECOND(min); |
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time[2] = BCD_FIRST(hour)*10 + BCD_SECOND(hour); |
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return SUCCESS;
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} |
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int (rtc_read_date)(uint8_t *date) {
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int r;
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//if ((r = rtc_set_updates(false))) return r;
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while (rtc_check_update());
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uint8_t year, month, day, weekday; |
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if ((r = rtc_read_register(RTC_WEEK_DAY, &weekday))) return r; |
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if ((r = rtc_read_register(RTC_MONTH_DAY, &day))) return r; |
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if ((r = rtc_read_register(RTC_MONTH, &month))) return r; |
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if ((r = rtc_read_register(RTC_YEAR, &year))) return r; |
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//if ((r = rtc_set_updates(true))) return r;
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date[0] = weekday;
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date[1] = BCD_FIRST(day)*10 + BCD_SECOND(day); |
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date[2] = BCD_FIRST(month)*10 + BCD_SECOND(month); |
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date[3] = BCD_FIRST(year)*10 + BCD_SECOND(year); |
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return SUCCESS;
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} |