reverese engeneering of TM1621 display
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@@ -8,9 +8,10 @@
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; Please visit documentation for the other options and examples
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; https://docs.platformio.org/page/projectconf.html
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[env:d1]
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platform = espressif8266
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board = d1
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[env:waveshare_rp2040_zero]
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platform = https://github.com/maxgerhardt/platform-raspberrypi.git
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board = waveshare_rp2040_zero
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framework = arduino
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monitor_speed = 115200
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upload_port = /dev/ttyUSB1
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lib_archive = no
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lib_deps = bogde/HX711@^0.7.5
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@@ -1,39 +1,224 @@
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#include <Arduino.h>
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const int triggerPin = D2;
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bool lastState = HIGH;
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#define LCD_DATA 29
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#define LCD_WR 28
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#define LCD_CS 27
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// Tracking variables
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int currentAddr = 0;
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int currentBit = 0;
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void writeBits(uint32_t data, uint8_t count) {
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for (int8_t i = count - 1; i >= 0; i--) {
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digitalWrite(LCD_WR, LOW);
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digitalWrite(LCD_DATA, (data >> i) & 0x01);
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digitalWrite(LCD_WR, HIGH);
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}
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}
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void sendCmd(uint8_t cmd) {
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digitalWrite(LCD_CS, LOW);
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writeBits(0x04, 3); // Binary 100 [cite: 432]
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writeBits(cmd, 8); // Command [cite: 413, 534]
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writeBits(0, 1); // X bit [cite: 416]
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digitalWrite(LCD_CS, HIGH);
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}
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void writeAddr(uint8_t addr, uint8_t data) {
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digitalWrite(LCD_CS, LOW);
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uint16_t header = (0x05 << 6) | (addr & 0x3F); // Mode 101 [cite: 475]
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writeBits(header, 9);
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writeBits(data & 0x0F, 4); // 4 bits of data [cite: 475]
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digitalWrite(LCD_CS, HIGH);
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}
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void updateDisplay() {
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// Clear all segments first
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for (int i = 0; i < 32; i++) {
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writeAddr(i, 0x00);
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}
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// Light up only the current bit
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writeAddr(currentAddr, (1 << currentBit));
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Serial.print(">>> CURRENT - Address: ");
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Serial.print(currentAddr);
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Serial.print(" | Bit (COM): ");
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Serial.println(currentBit);
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Serial.println("Enter 'n' for Next, 'p' for Prev:");
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}
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void setup() {
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Serial.begin(115200);
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randomSeed(analogRead(0));
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pinMode(LCD_DATA, OUTPUT);
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pinMode(LCD_WR, OUTPUT);
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pinMode(LCD_CS, OUTPUT);
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digitalWrite(LCD_CS, HIGH); // Initialize serial interface [cite: 443]
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pinMode(LED_BUILTIN, OUTPUT);
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pinMode(triggerPin, INPUT_PULLUP);
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Serial.begin(9600);
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// while (!Serial);
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// Flash LED to signal boot
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digitalWrite(LED_BUILTIN, LOW);
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delay(500);
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digitalWrite(LED_BUILTIN, HIGH);
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Serial.println("--- TM1621 Interactive Mapper ---");
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sendCmd(0x01); // SYS EN [cite: 534]
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sendCmd(0x29); // BIAS 1/3, 4 COM [cite: 420, 544]
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sendCmd(0x03); // LCD ON [cite: 534]
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updateDisplay();
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}
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const uint8_t digitMap[] = {
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0b11111100, // 0
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0b00000110, // 1
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0b01011011, // 2
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0b01001111, // 3
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0b01100110, // 4
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0b01101101, // 5
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0b01111101, // 6
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0b00000111, // 7
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0b01111111, // 8
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0b01101111 // 9
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};
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const int arrows[] = {283,363,183,203}; //tare,?,?,Zero
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const int battery[] = {63,83,103}; //LOW / MED / FULL
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// Following your pattern: {A, B, C, D, E, F, G}
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const int row1_d1[] = {300, 301, 302, 313, 312, 310, 311}; // Addresses 30 & 31
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const int row1_d2[] = {280, 281, 282, 293, 292, 290, 291}; // Addresses 28 & 29
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const int row1_d3[] = {260, 261, 262, 273, 272, 270, 271}; // Addresses 26 & 27
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const int row1_d4[] = {240, 241, 242, 253, 252, 250, 251}; // Addresses 24 & 25
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const int row1_d5[] = {220, 221, 222, 233, 232, 230, 231}; // Addresses 22 & 23
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const int row1_decimal[] = {263,232,223}; //XX.X.X.X
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const int row2_d1[] = {200, 201, 202, 213, 212, 210, 211}; // Addresses 20 & 21
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const int row2_d2[] = {180, 181, 182, 193, 192, 190, 191}; // Addresses 18 & 19
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const int row2_d3[] = {160, 161, 162, 173, 172, 170, 171}; // Addresses 16 & 17
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const int row2_d4[] = {140, 141, 142, 153, 152, 150, 151}; // Addresses 14 & 15
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const int row2_d5[] = {120, 121, 122, 133, 132, 130, 131}; // Addresses 12 & 13
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const int row2_decimal[] = {163,143,123}; //XX.X.X.X
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const int row3_d1[] = {100, 101, 102, 113, 112, 110, 111}; // Addresses 10 & 11
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const int row3_d2[] = {80, 81, 82, 93, 92, 90, 91}; // Addresses 8 & 9
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const int row3_d3[] = {60, 61, 62, 73, 72, 70, 71}; // Addresses 6 & 7
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const int row3_d4[] = {40, 41, 42, 53, 52, 50, 51}; // Addresses 4 & 5
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const int row3_d5[] = {20, 21, 22, 33, 32, 30, 31}; // Addresses 2 & 3
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const int row3_d6[] = {0, 1, 2, 13, 12, 10, 11}; // Addresses 0 & 1
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const int row3_decimal[] = {43,23,3}; //XX.X.X.X
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const int* digitsRow1[] = {row1_d1, row1_d2, row1_d3, row1_d4, row1_d5};
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const int* digitsRow2[] = {row2_d1, row2_d2, row2_d3, row2_d4, row2_d5};
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const int* digitsRow3[] = {row3_d1, row3_d2, row3_d3, row3_d4, row3_d5, row3_d6};
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const int* decimals[] = {row1_decimal, row2_decimal, row3_decimal};
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uint8_t shadowRAM[32] = {0};
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void writeMappedSegment(int aab, bool state) {
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int addr = aab / 10;
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int bit = aab % 10;
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if (state) shadowRAM[addr] |= (1 << bit);
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else shadowRAM[addr] &= ~(1 << bit);
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writeAddr(addr, shadowRAM[addr]);
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}
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void displayDigit(const int segments[], int number) {
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uint8_t bits = digitMap[number % 10];
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for (int i = 0; i < 7; i++) {
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// We check Bit 0, then Bit 1, etc.
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// This maps i=0 to Segment A, i=1 to Segment B...
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bool state = (bits >> i) & 0x01;
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writeMappedSegment(segments[i], state);
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}
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}
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void printToRow(int row, long value, int decimalPos = 0) {
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const int** currentRow;
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int numDigits;
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// Select row configuration
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switch(row) {
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case 1: currentRow = digitsRow1; numDigits = 5; break;
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case 2: currentRow = digitsRow2; numDigits = 5; break;
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case 3: currentRow = digitsRow3; numDigits = 6; break;
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default: return;
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}
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// Display the number right-aligned
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long tempValue = value;
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for (int i = numDigits - 1; i >= 0; i--) {
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if (tempValue > 0 || i == numDigits - 1) { // Show at least one digit
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displayDigit(currentRow[i], tempValue % 10);
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tempValue /= 10;
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} else {
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// Clear leading zeros (all segments off)
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for (int s = 0; s < 7; s++) writeMappedSegment(currentRow[i][s], false);
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}
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}
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// Handle Decimal Points (if applicable for that row)
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if (decimalPos > 0 && decimalPos <= 3) {
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writeMappedSegment(decimals[row-1][decimalPos-1], true);
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}
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}
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int counter1 = 0;
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int counter2 = 0;
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int counter3 = 0;
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void loop() {
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bool currentState = digitalRead(triggerPin);
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printToRow(1, counter1);
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printToRow(2, counter2);
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printToRow(3, counter3);
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// Detect when D4 touches GND (Falling Edge)
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if (currentState == LOW && lastState == HIGH) {
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int randomWeight = random(100, 5000);
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// Output formatted for easy parsing
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Serial.print("WEIGHT:");
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Serial.println(randomWeight);
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// Visual feedback
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digitalWrite(LED_BUILTIN, LOW);
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counter1 = (counter1 + 1) % 1000;
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counter2 = (counter2 + 2) % 1000;
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counter3 = (counter3 + 3) % 1000;
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delay(100);
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digitalWrite(LED_BUILTIN, HIGH);
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delay(250); // Debounce
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}
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lastState = currentState;
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}
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// void loop() {
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// writeAddr(0, 0x00);
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// writeAddr(1, 0x00);
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// writeAddr(2, 0x00);
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// writeAddr(3, 0x00);
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// displayDigit(row1_d1, counter);
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// Serial.println(counter);
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// counter++;
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// if (counter > 9) {
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// counter = 0;
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// }
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// delay(1000);
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// }
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// void loop() {
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// if (Serial.available() > 0) {
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// char input = Serial.read();
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// // Ignore newline/carriage return characters
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// if (input == '\n' || input == '\r') return;
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// if (input == 'n' || input == 'N') {
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// currentBit++;
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// if (currentBit > 3) {
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// currentBit = 0;
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// currentAddr++;
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// }
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// if (currentAddr > 31) currentAddr = 0;
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// updateDisplay();
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// }
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// else if (input == 'p' || input == 'P') {
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// currentBit--;
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// if (currentBit < 0) {
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// currentBit = 3;
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// currentAddr--;
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// }
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// if (currentAddr < 0) currentAddr = 31;
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// updateDisplay();
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// }
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// }
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// }
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