Nick Hahn
73518e6be4
Renamed the variable c that was used for saving the i2c offset that a computer wants to read. Additionally, a 4bit dip-switch can be read in using the Pins A0-A3.
131 lines
5.5 KiB
C++
131 lines
5.5 KiB
C++
#include <Arduino.h>
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//#include <SoftWire.h>
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//#include <AsyncDelay.h>
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#include <Wire.h> //Patch wire.h: BUFFER_LENGTH = 256 TWI_BUFFER_LENGTH 256
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// ToDo: Eigene Wire.h einbinden mit vorgepatchen Werten
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/*const uint8_t edid[256] = {
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0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x4C, 0x2D, 0xF4, 0x0C, 0x45, 0x52, 0x46, 0x31, 0x15, 0x19, 0x01, 0x03, 0x80, 0x3C, 0x22, 0x78, 0x2A, 0x52, 0x95, 0xA5, 0x56, 0x54, 0x9D, 0x25, 0x0E, 0x50, 0x54, 0xBF, 0xEF, 0x80, 0x71, 0x4F, 0x81, 0xC0, 0x81, 0x00, 0x81, 0x80, 0x95, 0x00, 0xA9, 0xC0, 0xB3, 0x00, 0x01, 0x01, 0x02, 0x3A, 0x80, 0x18, 0x71, 0x38, 0x2D, 0x40, 0x58, 0x2C, 0x45, 0x00, 0x56, 0x50, 0x21, 0x00, 0x00, 0x1E, 0x01, 0x1D, 0x00, 0x72, 0x51, 0xD0, 0x1E, 0x20, 0x6E, 0x28, 0x55, 0x00, 0x56, 0x50, 0x21, 0x00, 0x00, 0x1E, 0x00, 0x00, 0x00, 0xFD, 0x00, 0x32, 0x4B, 0x1E, 0x51, 0x11, 0x00, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xFC, 0x00, 0x53, 0x32, 0x37, 0x45, 0x33, 0x37, 0x30, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0x62, 0x02, 0x03, 0x1B, 0xF1, 0x46, 0x90, 0x04, 0x1F, 0x13, 0x03, 0x12, 0x67, 0x03, 0x0C, 0x00, 0x10, 0x00, 0x80, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, 0x01, 0x00, 0x00, 0x01, 0x1D, 0x00, 0xBC, 0x52, 0xD0, 0x1E, 0x20, 0xB8, 0x28, 0x55, 0x40, 0x56, 0x50, 0x21, 0x00, 0x00, 0x1E, 0x8C, 0x0A, 0xD0, 0x90, 0x20, 0x40, 0x31, 0x20, 0x0C, 0x40, 0x55, 0x00, 0x56, 0x50, 0x21, 0x00, 0x00, 0x18, 0x8C, 0x0A, 0xD0, 0x8A, 0x20, 0xE0, 0x2D, 0x10, 0x10, 0x3E, 0x96, 0x00, 0x56, 0x50, 0x21, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3D
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};*/
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#define EDID_LENGTH 128
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// 800x600
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const uint8_t edid[EDID_LENGTH] = {
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0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x1E, 0x6D, 0x7D, 0x58, 0xC1, 0x90, 0x02, 0x00,
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0x08, 0x16, 0x01, 0x03, 0x80, 0x33, 0x1D, 0x78, 0xEA, 0x5E, 0xA5, 0xA2, 0x55, 0x4D, 0xA0, 0x26,
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0x11, 0x50, 0x54, 0x27, 0x4B, 0x00, 0xB3, 0x00, 0x81, 0x80, 0x81, 0x40, 0x71, 0x4F, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xE8, 0x0D, 0x20, 0xA0, 0x30, 0x58, 0x12, 0x20, 0x30, 0x20,
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0x34, 0x00, 0xC8, 0x96, 0x00, 0x00, 0x00, 0x1A, 0x00, 0x00, 0x00, 0xFC, 0x00, 0x49, 0x50, 0x53,
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0x32, 0x33, 0x35, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xB7};
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// IPS235 1920x1080
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/*const uint8_t edid[128] = {
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0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x1E, 0x6D, 0x7E, 0x58, 0xC1, 0x90, 0x02, 0x00,
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0x08, 0x16, 0x01, 0x03, 0x80, 0x33, 0x1D, 0x78, 0xEA, 0x5E, 0xA5, 0xA2, 0x55, 0x4D, 0xA0, 0x26,
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0x11, 0x50, 0x54, 0x21, 0x08, 0x00, 0xB3, 0x00, 0x81, 0x80, 0x81, 0x40, 0x71, 0x40, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3A, 0x80, 0x18, 0x71, 0x38, 0x2D, 0x40, 0x58, 0x2C,
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0x45, 0x00, 0xE0, 0x0E, 0x11, 0x00, 0x00, 0x1E, 0x00, 0x00, 0x00, 0xFC, 0x00, 0x49, 0x50, 0x53,
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0x32, 0x33, 0x35, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xA8
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};*/
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unsigned int edid_offset;
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uint8_t edid_select;
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//SoftWire sw(A2, A3);
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void read_dip_switches()
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{
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if (digitalRead(A0) == 1)
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edid_select |= 0b10000000;
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if (digitalRead(A1) == 1)
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edid_select |= 0b01000000;
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if (digitalRead(A2) == 1)
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edid_select |= 0b00100000;
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if (digitalRead(A3) == 1)
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edid_select |= 0b00010000;
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}
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void receiveEvent(int receivedByte)
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{
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while (0 < Wire.available())
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{
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edid_offset = Wire.read(); /* receive start position */
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//Serial.print(c, HEX); /* print the requested position */
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}
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//Serial.println(); /* to newline */
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return;
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}
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void requestEvent()
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{
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// Send virtual EEPROM in full length from start position
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Wire.write(edid + edid_offset, EDID_LENGTH - edid_offset);
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}
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void setup()
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{
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Serial.begin(9600);
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Serial.println("**** HDMI ****");
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pinMode(4, OUTPUT); //Hot plug detection
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// Input for DIP switches for selecting from edids
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pinMode(A0, INPUT);
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pinMode(A1, INPUT);
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pinMode(A2, INPUT);
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pinMode(A3, INPUT);
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read_dip_switches();
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Wire.begin(0x50); // EDID Register
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digitalWrite(4, LOW);
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delay(20);
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Wire.onReceive(receiveEvent);
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Wire.onRequest(requestEvent);
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digitalWrite(4, HIGH); //Source knows that a screen is attached and want to read the edid of the screen
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/*sw.setTimeout_ms(40);
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sw.begin();
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pinMode(LED_BUILTIN, OUTPUT);
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digitalWrite(LED_BUILTIN, LOW);
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// Set how long we are willing to wait for a device to respond
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sw.setTimeout_ms(200);
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const uint8_t firstAddr = 1;
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const uint8_t lastAddr = 0x7F;
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Serial.println();
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Serial.print("Interrogating all addresses in range 0x");
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Serial.print(firstAddr, HEX);
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Serial.print(" - 0x");
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Serial.print(lastAddr, HEX);
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Serial.println(" (inclusive) ...");
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for (uint8_t addr = firstAddr; addr <= lastAddr; addr++) {
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digitalWrite(LED_BUILTIN, HIGH);
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delayMicroseconds(50);
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uint8_t startResult = sw.llStart((addr << 1) + 1); // Signal a read
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sw.stop();
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if (startResult == 0) {
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Serial.print("\rDevice found at 0x");
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Serial.println(addr, HEX);
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Serial.flush();
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}
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digitalWrite(LED_BUILTIN, LOW);
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delay(50);
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}
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Serial.println("Finished");*/
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}
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void loop()
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{
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}
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