mirror of
https://github.com/sergeyyarkov/attiny45v_thermometer.git
synced 2026-10-11 10:19:03 +03:00
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
#include "tm1637.h"
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#define get_symbol(index) (pgm_read_byte_near(&display_symbols[index]))
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static const uint8_t display_symbols[] PROGMEM =
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{
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0x3F, // 0
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0x06, // 1
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0x5B, // 2
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0x4F, // 3
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0x66, // 4
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0x6D, // 5
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0x7D, // 6
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0x07, // 7
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0x7F, // 8
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0x6F, // 9
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};
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uint8_t get_int_length(int16_t num) {
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uint8_t l = 1;
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if (num < 0) num = -num;
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while (num > 9) {
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num /= 10;
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l++;
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}
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return l;
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}
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void TM1637_WriteByte(uint8_t data) {
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TWI_Start();
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TWI_WriteByte(data);
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TWI_Stop();
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}
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void TM1637_Init(uint8_t DIO_PIN, uint8_t CLK_PIN, uint8_t brightness, uint8_t enabled) {
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DDR_TWI |= _BV(DIO_PIN) | _BV(CLK_PIN);
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PORT_TWI &= ~(_BV(DIO_PIN) | _BV(CLK_PIN));
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TM1637_WriteByte(TM1637_DISP_CMD | (enabled | brightness));
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}
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void TM1637_DisplaySymbol(uint8_t symbol, uint8_t pos) {
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TM1637_WriteByte(TM1637_DATA_CMD);
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TWI_Start();
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TWI_WriteByte(TM1637_ADDR_CMD | pos);
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TWI_WriteByte(symbol);
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TWI_Stop();
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}
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void TM1637_DisplayLine(void) {
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uint8_t i = TM1637_DIGITS_COUNT;
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do {
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TM1637_DisplaySymbol(0x40, i - 1);
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} while (--i);
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}
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void TM1637_DisplayInt(int16_t num) {
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uint8_t is_signed = num < 0;
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int16_t tmp = num > 999 ? 999 : num;
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uint8_t i = TM1637_DIGITS_COUNT;
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if (is_signed) {
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tmp = -tmp;
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TM1637_DisplaySymbol(0x40, 0);
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}
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do {
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if (is_signed && i == 1) break;
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TM1637_DisplaySymbol(pgm_read_byte_near(&display_symbols[tmp % 10]), i - 1);
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tmp /= 10;
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} while (--i);
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}
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void TM1637_DisplayFixedNum(int16_t num, uint8_t frac, uint8_t presicion, uint8_t sign) {
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uint8_t is_signed = (num < 0) || (sign);
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num = num > 999 ? 999 : num;
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if (is_signed) {
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num = -num;
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}
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uint8_t length = get_int_length(num);
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uint8_t is_overflow = length + 1 == TM1637_DIGITS_COUNT;
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uint8_t i = TM1637_DIGITS_COUNT, j = is_overflow && is_signed ? 1 : 0;
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uint8_t buffer[TM1637_DIGITS_COUNT];
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do {
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buffer[i - 1] = num % 10;
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num /= 10;
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} while (--i);
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if (length != 1) {
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i = TM1637_DIGITS_COUNT - length;
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} else {
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i = 1;
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}
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while (i < TM1637_DIGITS_COUNT) {
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if (is_signed && j == 0) {
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TM1637_DisplaySymbol(0x40, 0);
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i++;
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j++;
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continue;
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}
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TM1637_DisplaySymbol(
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(j == TM1637_DIGITS_COUNT - 1 - presicion && TM1637_DIGITS_COUNT != length)
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? get_symbol(buffer[i]) | (is_overflow && is_signed ? 0 : 0x80) // точка
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: (!is_signed &&
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((buffer[0] == 0 && buffer[i] == 0 && buffer[i + 1] != 0) || (length == 1 && i != TM1637_DIGITS_COUNT - 1)) // убираем вывод нулей
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? 0x00
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: get_symbol(buffer[i])
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),
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j);
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i++;
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j++;
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}
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TM1637_DisplaySymbol(get_symbol(frac), j);
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}
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