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esphome/esphome/components/tm1637/tm1637.cpp

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#include "tm1637.h"
#include "esphome/core/log.h"
#include "esphome/core/helpers.h"
namespace esphome {
namespace tm1637 {
const char *TAG = "display.tm1637";
const uint8_t TM1637_I2C_COMM1 = 0x40;
const uint8_t TM1637_I2C_COMM2 = 0xC0;
const uint8_t TM1637_I2C_COMM3 = 0x80;
const uint8_t TM1637_UNKNOWN_CHAR = 0b11111111;
//
// A
// ---
// F | | B
// -G-
// E | | C
// ---
// D X
// XABCDEFG
const uint8_t TM1637_ASCII_TO_RAW[] PROGMEM = {
0b00000000, // ' ', ord 0x20
0b10110000, // '!', ord 0x21
0b00100010, // '"', ord 0x22
TM1637_UNKNOWN_CHAR, // '#', ord 0x23
TM1637_UNKNOWN_CHAR, // '$', ord 0x24
0b01001001, // '%', ord 0x25
TM1637_UNKNOWN_CHAR, // '&', ord 0x26
0b00000010, // ''', ord 0x27
0b01001110, // '(', ord 0x28
0b01111000, // ')', ord 0x29
0b01000000, // '*', ord 0x2A
TM1637_UNKNOWN_CHAR, // '+', ord 0x2B
0b00010000, // ',', ord 0x2C
0b00000001, // '-', ord 0x2D
0b10000000, // '.', ord 0x2E
TM1637_UNKNOWN_CHAR, // '/', ord 0x2F
0b01111110, // '0', ord 0x30
0b00110000, // '1', ord 0x31
0b01101101, // '2', ord 0x32
0b01111001, // '3', ord 0x33
0b00110011, // '4', ord 0x34
0b01011011, // '5', ord 0x35
0b01011111, // '6', ord 0x36
0b01110000, // '7', ord 0x37
0b01111111, // '8', ord 0x38
0b01111011, // '9', ord 0x39
0b01001000, // ':', ord 0x3A
0b01011000, // ';', ord 0x3B
TM1637_UNKNOWN_CHAR, // '<', ord 0x3C
TM1637_UNKNOWN_CHAR, // '=', ord 0x3D
TM1637_UNKNOWN_CHAR, // '>', ord 0x3E
0b01100101, // '?', ord 0x3F
0b01101111, // '@', ord 0x40
0b01110111, // 'A', ord 0x41
0b00011111, // 'B', ord 0x42
0b01001110, // 'C', ord 0x43
0b00111101, // 'D', ord 0x44
0b01001111, // 'E', ord 0x45
0b01000111, // 'F', ord 0x46
0b01011110, // 'G', ord 0x47
0b00110111, // 'H', ord 0x48
0b00110000, // 'I', ord 0x49
0b00111100, // 'J', ord 0x4A
TM1637_UNKNOWN_CHAR, // 'K', ord 0x4B
0b00001110, // 'L', ord 0x4C
TM1637_UNKNOWN_CHAR, // 'M', ord 0x4D
0b00010101, // 'N', ord 0x4E
0b01111110, // 'O', ord 0x4F
0b01100111, // 'P', ord 0x50
0b11111110, // 'Q', ord 0x51
0b00000101, // 'R', ord 0x52
0b01011011, // 'S', ord 0x53
0b00000111, // 'T', ord 0x54
0b00111110, // 'U', ord 0x55
0b00111110, // 'V', ord 0x56
0b00111111, // 'W', ord 0x57
TM1637_UNKNOWN_CHAR, // 'X', ord 0x58
0b00100111, // 'Y', ord 0x59
0b01101101, // 'Z', ord 0x5A
0b01001110, // '[', ord 0x5B
TM1637_UNKNOWN_CHAR, // '\', ord 0x5C
0b01111000, // ']', ord 0x5D
TM1637_UNKNOWN_CHAR, // '^', ord 0x5E
0b00001000, // '_', ord 0x5F
0b00100000, // '`', ord 0x60
0b01110111, // 'a', ord 0x61
0b00011111, // 'b', ord 0x62
0b00001101, // 'c', ord 0x63
0b00111101, // 'd', ord 0x64
0b01001111, // 'e', ord 0x65
0b01000111, // 'f', ord 0x66
0b01011110, // 'g', ord 0x67
0b00010111, // 'h', ord 0x68
0b00010000, // 'i', ord 0x69
0b00111100, // 'j', ord 0x6A
TM1637_UNKNOWN_CHAR, // 'k', ord 0x6B
0b00001110, // 'l', ord 0x6C
TM1637_UNKNOWN_CHAR, // 'm', ord 0x6D
0b00010101, // 'n', ord 0x6E
0b00011101, // 'o', ord 0x6F
0b01100111, // 'p', ord 0x70
TM1637_UNKNOWN_CHAR, // 'q', ord 0x71
0b00000101, // 'r', ord 0x72
0b01011011, // 's', ord 0x73
0b00000111, // 't', ord 0x74
0b00011100, // 'u', ord 0x75
0b00011100, // 'v', ord 0x76
TM1637_UNKNOWN_CHAR, // 'w', ord 0x77
TM1637_UNKNOWN_CHAR, // 'x', ord 0x78
0b00100111, // 'y', ord 0x79
TM1637_UNKNOWN_CHAR, // 'z', ord 0x7A
0b00110001, // '{', ord 0x7B
0b00000110, // '|', ord 0x7C
0b00000111, // '}', ord 0x7D
0b01100011, // '~', ord 0x7E (degree symbol)
};
void TM1637Display::setup() {
ESP_LOGCONFIG(TAG, "Setting up TM1637...");
this->clk_pin_->setup(); // OUTPUT
this->clk_pin_->digital_write(false); // LOW
this->dio_pin_->setup(); // OUTPUT
this->dio_pin_->digital_write(false); // LOW
this->display();
}
void TM1637Display::dump_config() {
ESP_LOGCONFIG(TAG, "TM1637:");
ESP_LOGCONFIG(TAG, " INTENSITY: %d", this->intensity_);
LOG_PIN(" CLK Pin: ", this->clk_pin_);
LOG_PIN(" DIO Pin: ", this->dio_pin_);
LOG_UPDATE_INTERVAL(this);
}
void TM1637Display::update() {
for (uint8_t &i : this->buffer_)
i = 0;
if (this->writer_.has_value())
(*this->writer_)(*this);
this->display();
}
float TM1637Display::get_setup_priority() const { return setup_priority::PROCESSOR; }
void TM1637Display::bit_delay_() { delayMicroseconds(100); }
void TM1637Display::start_() {
this->dio_pin_->pin_mode(OUTPUT);
this->bit_delay_();
}
void TM1637Display::stop_() {
this->dio_pin_->pin_mode(OUTPUT);
bit_delay_();
this->clk_pin_->pin_mode(INPUT);
bit_delay_();
this->dio_pin_->pin_mode(INPUT);
bit_delay_();
}
void TM1637Display::display() {
ESP_LOGVV(TAG, "Display %02X%02X%02X%02X", buffer_[0], buffer_[1], buffer_[2], buffer_[3]);
// Write COMM1
this->start_();
this->send_byte_(TM1637_I2C_COMM1);
this->stop_();
// Write COMM2 + first digit address
this->start_();
this->send_byte_(TM1637_I2C_COMM2);
// Write the data bytes
for (auto b : this->buffer_) {
this->send_byte_(b);
}
this->stop_();
// Write COMM3 + brightness
this->start_();
this->send_byte_(TM1637_I2C_COMM3 + ((this->intensity_ & 0x7) | 0x08));
this->stop_();
}
bool TM1637Display::send_byte_(uint8_t b) {
uint8_t data = b;
// 8 Data Bits
for (uint8_t i = 0; i < 8; i++) {
// CLK low
this->clk_pin_->pin_mode(OUTPUT);
this->bit_delay_();
// Set data bit
if (data & 0x01)
this->dio_pin_->pin_mode(INPUT);
else
this->dio_pin_->pin_mode(OUTPUT);
this->bit_delay_();
// CLK high
this->clk_pin_->pin_mode(INPUT);
this->bit_delay_();
data = data >> 1;
}
// Wait for acknowledge
// CLK to zero
this->clk_pin_->pin_mode(OUTPUT);
this->dio_pin_->pin_mode(INPUT);
this->bit_delay_();
// CLK to high
this->clk_pin_->pin_mode(INPUT);
this->bit_delay_();
uint8_t ack = this->dio_pin_->digital_read();
if (ack == 0) {
this->dio_pin_->pin_mode(OUTPUT);
}
this->bit_delay_();
this->clk_pin_->pin_mode(OUTPUT);
this->bit_delay_();
return ack;
}
uint8_t TM1637Display::print(uint8_t start_pos, const char *str) {
ESP_LOGV(TAG, "Print at %d: %s", start_pos, str);
uint8_t pos = start_pos;
for (; *str != '\0'; str++) {
uint8_t data = TM1637_UNKNOWN_CHAR;
if (*str >= ' ' && *str <= '~')
data = pgm_read_byte(&TM1637_ASCII_TO_RAW[*str - ' ']);
if (data == TM1637_UNKNOWN_CHAR) {
ESP_LOGW(TAG, "Encountered character '%c' with no TM1637 representation while translating string!", *str);
}
// Remap segments, for compatibility with MAX7219 segment definition which is
// XABCDEFG, but TM1637 is // XGFEDCBA
data = ((data & 0x80) ? 0x80 : 0) | // no move X
((data & 0x40) ? 0x1 : 0) | // A
((data & 0x20) ? 0x2 : 0) | // B
((data & 0x10) ? 0x4 : 0) | // C
((data & 0x8) ? 0x8 : 0) | // D
((data & 0x4) ? 0x10 : 0) | // E
((data & 0x2) ? 0x20 : 0) | // F
((data & 0x1) ? 0x40 : 0); // G
if (*str == '.') {
if (pos != start_pos)
pos--;
this->buffer_[pos] |= 0b10000000;
} else {
if (pos >= 6) {
ESP_LOGE(TAG, "String is too long for the display!");
break;
}
this->buffer_[pos] = data;
}
pos++;
}
return pos - start_pos;
}
uint8_t TM1637Display::print(const char *str) { return this->print(0, str); }
uint8_t TM1637Display::printf(uint8_t pos, const char *format, ...) {
va_list arg;
va_start(arg, format);
char buffer[64];
int ret = vsnprintf(buffer, sizeof(buffer), format, arg);
va_end(arg);
if (ret > 0)
return this->print(pos, buffer);
return 0;
}
uint8_t TM1637Display::printf(const char *format, ...) {
va_list arg;
va_start(arg, format);
char buffer[64];
int ret = vsnprintf(buffer, sizeof(buffer), format, arg);
va_end(arg);
if (ret > 0)
return this->print(buffer);
return 0;
}
#ifdef USE_TIME
uint8_t TM1637Display::strftime(uint8_t pos, const char *format, time::ESPTime time) {
char buffer[64];
size_t ret = time.strftime(buffer, sizeof(buffer), format);
if (ret > 0)
return this->print(pos, buffer);
return 0;
}
uint8_t TM1637Display::strftime(const char *format, time::ESPTime time) { return this->strftime(0, format, time); }
#endif
} // namespace tm1637
} // namespace esphome
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