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https://github.com/meshtastic/firmware.git
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Put a bit of order in the src directory, group and name things appropriately
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163
src/detect/i2cScan.h
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163
src/detect/i2cScan.h
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#include "../configuration.h"
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#include "../main.h"
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#include <Wire.h>
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#include "mesh/generated/telemetry.pb.h"
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#ifdef HAS_AXP192
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#include "axp20x.h"
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#endif
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#if HAS_WIRE
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uint16_t getRegisterValue(uint8_t address, uint8_t reg, uint8_t length) {
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uint16_t value = 0x00;
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Wire.beginTransmission(address);
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Wire.write(reg);
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Wire.endTransmission();
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delay(20);
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Wire.requestFrom(address, length);
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DEBUG_MSG("Wire.available() = %d\n", Wire.available());
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if (Wire.available() == 2) {
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// Read MSB, then LSB
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value = (uint16_t)Wire.read() << 8;
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value |= Wire.read();
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} else if (Wire.available()) {
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value = Wire.read();
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}
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return value;
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}
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uint8_t oled_probe(byte addr)
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{
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uint8_t r = 0;
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uint8_t r_prev = 0;
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uint8_t c = 0;
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uint8_t o_probe = 0;
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do {
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r_prev = r;
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Wire.beginTransmission(addr);
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Wire.write(0x00);
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Wire.endTransmission();
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Wire.requestFrom((int)addr, 1);
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if (Wire.available()) {
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r = Wire.read();
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}
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r &= 0x0f;
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if (r == 0x08 || r == 0x00) {
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o_probe = 2; // SH1106
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} else if ( r == 0x03 || r == 0x06 || r == 0x07) {
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o_probe = 1; // SSD1306
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}
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c++;
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} while ((r != r_prev) && (c < 4));
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DEBUG_MSG("0x%x subtype probed in %i tries \n", r, c);
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return o_probe;
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}
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void scanI2Cdevice(void)
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{
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byte err, addr;
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uint16_t registerValue = 0x00;
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int nDevices = 0;
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for (addr = 1; addr < 127; addr++) {
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Wire.beginTransmission(addr);
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err = Wire.endTransmission();
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if (err == 0) {
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DEBUG_MSG("I2C device found at address 0x%x\n", addr);
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nDevices++;
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if (addr == SSD1306_ADDRESS) {
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screen_found = addr;
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screen_model = oled_probe(addr);
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if (screen_model == 1){
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DEBUG_MSG("ssd1306 display found\n");
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} else if (screen_model == 2){
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DEBUG_MSG("sh1106 display found\n");
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} else {
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DEBUG_MSG("unknown display found\n");
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}
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}
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#ifdef RV3028_RTC
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if (addr == RV3028_RTC){
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rtc_found = addr;
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DEBUG_MSG("RV3028 RTC found\n");
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Melopero_RV3028 rtc;
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rtc.initI2C();
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rtc.writeToRegister(0x35,0x07); // no Clkout
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rtc.writeToRegister(0x37,0xB4);
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}
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#endif
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#ifdef PCF8563_RTC
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if (addr == PCF8563_RTC){
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rtc_found = addr;
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DEBUG_MSG("PCF8563 RTC found\n");
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}
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#endif
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if (addr == CARDKB_ADDR) {
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cardkb_found = addr;
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// Do we have the RAK14006 instead?
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registerValue = getRegisterValue(addr, 0x04, 1);
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if (registerValue == 0x02) { // KEYPAD_VERSION
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DEBUG_MSG("RAK14004 found\n");
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kb_model = 0x02;
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} else {
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DEBUG_MSG("m5 cardKB found\n");
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kb_model = 0x00;
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}
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}
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if (addr == FACESKB_ADDR) {
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faceskb_found = addr;
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DEBUG_MSG("m5 Faces found\n");
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}
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if (addr == ST7567_ADDRESS) {
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screen_found = addr;
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DEBUG_MSG("st7567 display found\n");
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}
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#ifdef HAS_AXP192
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if (addr == AXP192_SLAVE_ADDRESS) {
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axp192_found = true;
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DEBUG_MSG("axp192 PMU found\n");
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}
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#endif
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if (addr == BME_ADDR || addr == BME_ADDR_ALTERNATE) {
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registerValue = getRegisterValue(addr, 0xD0, 1); // GET_ID
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if (registerValue == 0x61) {
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DEBUG_MSG("BME-680 sensor found at address 0x%x\n", (uint8_t)addr);
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nodeTelemetrySensorsMap[TelemetrySensorType_BME680] = addr;
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} else if (registerValue == 0x60) {
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DEBUG_MSG("BME-280 sensor found at address 0x%x\n", (uint8_t)addr);
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nodeTelemetrySensorsMap[TelemetrySensorType_BME280] = addr;
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} else {
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DEBUG_MSG("BMP-280 sensor found at address 0x%x\n", (uint8_t)addr);
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nodeTelemetrySensorsMap[TelemetrySensorType_BMP280] = addr;
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}
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}
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if (addr == INA_ADDR || addr == INA_ADDR_ALTERNATE) {
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registerValue = getRegisterValue(addr, 0xFE, 2);
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DEBUG_MSG("Register MFG_UID: 0x%x\n", registerValue);
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if (registerValue == 0x5449) {
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DEBUG_MSG("INA260 sensor found at address 0x%x\n", (uint8_t)addr);
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nodeTelemetrySensorsMap[TelemetrySensorType_INA260] = addr;
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} else { // Assume INA219 if INA260 ID is not found
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DEBUG_MSG("INA219 sensor found at address 0x%x\n", (uint8_t)addr);
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nodeTelemetrySensorsMap[TelemetrySensorType_INA219] = addr;
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}
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}
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if (addr == MCP9808_ADDR) {
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nodeTelemetrySensorsMap[TelemetrySensorType_MCP9808] = addr;
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DEBUG_MSG("MCP9808 sensor found at address 0x%x\n", (uint8_t)addr);
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}
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} else if (err == 4) {
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DEBUG_MSG("Unknow error at address 0x%x\n", addr);
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}
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}
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if (nDevices == 0)
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DEBUG_MSG("No I2C devices found\n");
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else
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DEBUG_MSG("%i I2C devices found\n",nDevices);
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}
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#else
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void scanI2Cdevice(void) {}
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#endif
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