101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
#include "driver/i2c.h"
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#include "esp_log.h"
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#include "display.h"
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#define DISP_ADDR 0x70
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#define I2C_PORT I2C_NUM_0
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// Exemplo de tabela 16 bits para 0–9 (tens de afinar os bits para o teu módulo)
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static const uint16_t segtbl16[10] = {
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0b0000000000111111, // 0
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0b0000000000000110, // 1
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0b0000000001011011, // 2
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0b0000000001001111, // 3
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0b0000000001100110, // 4
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0b0000000001101101, // 5
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0b0000000001111101, // 6
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0b0000000000000111, // 7
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0b0000000001111111, // 8
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0b0000000001101111 // 9
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};
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static const uint16_t alpha_map[] = {
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['A'] = 0b0000000001110111,
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['b'] = 0b0000000001111100,
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['C'] = 0b0000000000111001,
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['d'] = 0b0000000001011110,
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['E'] = 0b0000000001111001,
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['F'] = 0b0000000001110001,
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['H'] = 0b0000000001110110,
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['L'] = 0b0000000000111000,
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['P'] = 0b0000000001110011,
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['r'] = 0b0000000001010000,
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['U'] = 0b0000000000111110,
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};
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void display_init(void)
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{
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// Oscillator ON
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uint8_t cmd1 = 0x21;
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i2c_master_write_to_device(I2C_PORT, DISP_ADDR, &cmd1, 1, 20 / portTICK_PERIOD_MS);
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// Display ON, no blink
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uint8_t cmd2 = 0x81;
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i2c_master_write_to_device(I2C_PORT, DISP_ADDR, &cmd2, 1, 20 / portTICK_PERIOD_MS);
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// Brilho máximo
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uint8_t cmd3 = 0xEF;
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i2c_master_write_to_device(I2C_PORT, DISP_ADDR, &cmd3, 1, 20 / portTICK_PERIOD_MS);
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display_clear();
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}
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void display_clear(void)
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{
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uint8_t buf[17] = {0};
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buf[0] = 0x00;
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i2c_master_write_to_device(I2C_PORT, DISP_ADDR, buf, sizeof(buf), 20 / portTICK_PERIOD_MS);
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}
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void display_digit(int pos, uint8_t val)
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{
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if (pos < 0 || pos > 3) return;
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if (val > 9) val = 0;
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uint16_t pattern = segtbl16[val];
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uint8_t buf[3];
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buf[0] = pos * 2; // endereço base do dígito
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buf[1] = pattern & 0xFF; // byte baixo (bits 0–7)
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buf[2] = (pattern >> 8) & 0xFF; // byte alto (bits 8–15)
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i2c_master_write_to_device(I2C_PORT, DISP_ADDR, buf, 3,
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20 / portTICK_PERIOD_MS);
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}
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void display_number(int num)
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{
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if (num < 0) num = 0;
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if (num > 9999) num = 9999;
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display_digit(3, num % 10);
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display_digit(2, (num / 10) % 10);
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display_digit(1, (num / 100) % 10);
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display_digit(0, (num / 1000) % 10);
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}
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void display_set_time(int h, int m)
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{
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if (h < 0) h = 0;
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if (h > 23) h = h % 24;
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if (m < 0) m = 0;
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if (m > 59) m = m % 60;
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int value = h * 100 + m; // HHMM
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display_number(value);
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}
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