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 * battery index
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 * battery index
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 * ##########################################################################*/
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 * ##########################################################################*/
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/**
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/**
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 * draw a battery symbol at <x>/<y> according to <voltage>
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 * draw a battery symbol at <x>/<y> according to <voltage>
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 */
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 */
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void draw_battery(uint8_t x, uint8_t y, uint16_t voltage) {
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void draw_battery(uint8_t x, uint8_t y, uint8_t min_voltage, uint8_t voltage, uint8_t max_voltage) {
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        uint8_t percent = (100* (voltage - UBAT_WRN) / (UBAT_MAX - UBAT_WRN));
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        uint8_t percent = (100* (voltage - min_voltage) / (max_voltage - min_voltage));
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        if (percent > 100) percent = 100;
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        if (percent > 100) percent = 100;
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        if (voltage < UBAT_WRN) percent = 0;
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        if (voltage < min_voltage) percent = 0;
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        write_char_xy(x, y, 0x9d - (percent * 13 / 100));
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        write_char_xy(x, y, 0x9d - (percent * 13 / 100));
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        //write_ndigit_number_u(x, y-1, percent * 13 / 100, 100, 0);
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        //write_ndigit_number_u(x, y-1, percent * 13 / 100, 100, 0);
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}
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}
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