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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"
#include "esphome/core/hal.h"
namespace esphome {
namespace tm1637 {
static const char *const TAG = "display.tm1637";
const uint8_t TM1637_CMD_DATA = 0x40; //!< Display data command
const uint8_t TM1637_CMD_CTRL = 0x80; //!< Display control command
const uint8_t TM1637_CMD_ADDR = 0xc0; //!< Display address command
const uint8_t TM1637_UNKNOWN_CHAR = 0b11111111;
// Data command bits
const uint8_t TM1637_DATA_WRITE = 0x00; //!< Write data
const uint8_t TM1637_DATA_READ_KEYS = 0x02; //!< Read keys
const uint8_t TM1637_DATA_AUTO_INC_ADDR = 0x00; //!< Auto increment address
const uint8_t TM1637_DATA_FIXED_ADDR = 0x04; //!< Fixed address
//
// 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_);
ESP_LOGCONFIG(TAG, " Inverted: %d", this->inverted_);
ESP_LOGCONFIG(TAG, " Length: %d", this->length_);
LOG_PIN(" CLK Pin: ", this->clk_pin_);
LOG_PIN(" DIO Pin: ", this->dio_pin_);
LOG_UPDATE_INTERVAL(this);
}
#ifdef USE_BINARY_SENSOR
void TM1637Display::loop() {
uint8_t val = this->get_keys();
for (auto *tm1637_key : this->tm1637_keys_)
tm1637_key->process(val);
}
uint8_t TM1637Display::get_keys() {
this->start_();
this->send_byte_(TM1637_CMD_DATA | TM1637_DATA_READ_KEYS);
this->start_();
uint8_t key_code = read_byte_();
this->stop_();
if (key_code != 0xFF) {
// Invert key_code:
// Bit | 7 6 5 4 3 2 1 0
// ------+-------------------------
// From | S0 S1 S2 K1 K2 1 1 1
// To | S0 S1 S2 K1 K2 0 0 0
key_code = ~key_code;
// Shift bits to:
// Bit | 7 6 5 4 3 2 1 0
// ------+------------------------
// To | 0 0 0 0 K2 S2 S1 S0
key_code = (uint8_t) ((key_code & 0x80) >> 7 | (key_code & 0x40) >> 5 | (key_code & 0x20) >> 3 | (key_code & 0x08));
}
return key_code;
}
#endif
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(gpio::FLAG_OUTPUT);
this->bit_delay_();
}
void TM1637Display::stop_() {
this->dio_pin_->pin_mode(gpio::FLAG_OUTPUT);
bit_delay_();
this->clk_pin_->pin_mode(gpio::FLAG_INPUT);
bit_delay_();
this->dio_pin_->pin_mode(gpio::FLAG_INPUT);
bit_delay_();
}
void TM1637Display::display() {
ESP_LOGVV(TAG, "Display %02X%02X%02X%02X", buffer_[0], buffer_[1], buffer_[2], buffer_[3]);
// Write DATA CMND
this->start_();
this->send_byte_(TM1637_CMD_DATA);
this->stop_();
// Write ADDR CMD + first digit address
this->start_();
this->send_byte_(TM1637_CMD_ADDR);
// Write the data bytes
if (this->inverted_) {
for (int8_t i = this->length_ - 1; i >= 0; i--) {
this->send_byte_(this->buffer_[i]);
}
} else {
for (auto b : this->buffer_) {
this->send_byte_(b);
}
}
this->stop_();
// Write display CTRL CMND + brightness
this->start_();
this->send_byte_(TM1637_CMD_CTRL + ((this->intensity_ & 0x7) | (this->on_ ? 0x08 : 0x00)));
this->stop_();
}
bool TM1637Display::send_byte_(uint8_t b) {
uint8_t data = b;
for (uint8_t i = 0; i < 8; i++) {
// CLK low
this->clk_pin_->pin_mode(gpio::FLAG_OUTPUT);
this->bit_delay_();
// Set data bit
if (data & 0x01) {
this->dio_pin_->pin_mode(gpio::FLAG_INPUT);
} else {
this->dio_pin_->pin_mode(gpio::FLAG_OUTPUT);
}
this->bit_delay_();
// CLK high
this->clk_pin_->pin_mode(gpio::FLAG_INPUT);
this->bit_delay_();
data = data >> 1;
}
// Wait for acknowledge
// CLK to zero
this->clk_pin_->pin_mode(gpio::FLAG_OUTPUT);
this->dio_pin_->pin_mode(gpio::FLAG_INPUT);
this->bit_delay_();
// CLK to high
this->clk_pin_->pin_mode(gpio::FLAG_INPUT);
this->bit_delay_();
uint8_t ack = this->dio_pin_->digital_read();
if (ack == 0) {
this->dio_pin_->pin_mode(gpio::FLAG_OUTPUT);
}
this->bit_delay_();
this->clk_pin_->pin_mode(gpio::FLAG_OUTPUT);
this->bit_delay_();
return ack;
}
uint8_t TM1637Display::read_byte_() {
uint8_t retval = 0;
// Prepare DIO to read data
this->dio_pin_->pin_mode(gpio::FLAG_INPUT);
this->bit_delay_();
// Data is shifted out by the TM1637 on the CLK falling edge
for (uint8_t bit = 0; bit < 8; bit++) {
this->clk_pin_->pin_mode(gpio::FLAG_INPUT);
this->bit_delay_();
// Read next bit
retval <<= 1;
if (this->dio_pin_->digital_read()) {
retval |= 0x01;
}
this->clk_pin_->pin_mode(gpio::FLAG_OUTPUT);
this->bit_delay_();
}
// Return DIO to output mode
// Dummy ACK
this->dio_pin_->pin_mode(gpio::FLAG_OUTPUT);
this->bit_delay_();
this->clk_pin_->pin_mode(gpio::FLAG_INPUT);
this->bit_delay_();
this->clk_pin_->pin_mode(gpio::FLAG_OUTPUT);
this->bit_delay_();
this->dio_pin_->pin_mode(gpio::FLAG_INPUT);
this->bit_delay_();
return retval;
}
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;
bool use_dot = false;
for (; *str != '\0'; str++) {
uint8_t data = TM1637_UNKNOWN_CHAR;
if (*str >= ' ' && *str <= '~')
data = progmem_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
if (this->inverted_) {
// XABCDEFG > XGCBAFED
data = ((data & 0x80) || use_dot ? 0x80 : 0) | // no move X
((data & 0x40) ? 0x8 : 0) | // A
((data & 0x20) ? 0x10 : 0) | // B
((data & 0x10) ? 0x20 : 0) | // C
((data & 0x8) ? 0x1 : 0) | // D
((data & 0x4) ? 0x2 : 0) | // E
((data & 0x2) ? 0x4 : 0) | // F
((data & 0x1) ? 0x40 : 0); // G
} else {
// XABCDEFG > 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
}
use_dot = *str == '.';
if (use_dot) {
if ((!this->inverted_) && (pos != start_pos)) {
this->buffer_[pos - 1] |= 0b10000000;
}
} else {
if (pos >= 6) {
ESP_LOGE(TAG, "String is too long for the display!");
break;
}
this->buffer_[pos++] = data;
}
}
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;
}
uint8_t TM1637Display::strftime(uint8_t pos, const char *format, 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, ESPTime time) { return this->strftime(0, format, time); }
} // namespace tm1637
} // namespace esphome
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