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        while (pgm_read_byte(string) != 0x00)
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        while (pgm_read_byte(string) != 0x00)
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                write_ascii_char(((x++)+(y * 30)), pgm_read_byte(string++));
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                write_ascii_char(((x++)+(y * 30)), pgm_read_byte(string++));
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}
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}
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/**
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/**
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 *  write an <string> from progmen at <x>/<y> downwards to MAX7456 display memory
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 */
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void write_string_pgm_down(uint8_t x, uint8_t y, char *string, uint8_t length) {
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        while (length--)
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                write_char((x+(y++ * 30)), pgm_read_byte(string++));
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}
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/**
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 * Write only some digits of a unsigned <number> at <x>/<y> to MAX7456 display memory
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 * Write only some digits of a unsigned <number> at <x>/<y> to MAX7456 display memory
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 * <num> represents the largest multiple of 10 that will still be displayable as
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 * <num> represents the largest multiple of 10 that will still be displayable as
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 * the first digit, so num = 10 will be 0-99 and so on
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 * the first digit, so num = 10 will be 0-99 and so on
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 * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of   7
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 * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of   7
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 */
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 */