[参考译文] BQ76952：如何进入配置模式？

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1498263/bq76952-how-to-enter-config-mode

工具/软件：

大家好：  

我无法使用  BQ76952进入配置模式、实际上我无法向寄存器写入任何内容。 我完成了各种测试、所有寄存器保持不变。  0x00 Control Status ()命令返回该值"100101000000000"、0x12 Battery Status ()返回该值"1111110010001100"、有时会切换到该值"1100010010000100 "。 我将 ESP32与 I2C 配合使用

我非常感谢您的帮助。 谢谢:)

#include <Wire.h>

// BQ76952 I2C address (7-bit)
#define BQ76952_I2C_ADDR 0x08

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22, 400000); 

  delay(2000);

  uint16_t subcmdStatus = readWord(0x00);  
  Serial.print("Subcommand Status (0x00): ");
  Serial.println(subcmdStatus, BIN);  /

  uint16_t batteryStatus = readWord(0x12);
  Serial.print("batteryStatus (0x12): ");
  Serial.println(batteryStatus, BIN);

  delay(500); 

  enterConfigUpdateMode();
}

void loop() {
  delay(1000);  
}

uint16_t readWord(uint8_t reg) {
  Wire.beginTransmission(BQ76952_I2C_ADDR);  
  Wire.write(reg);                           
  Wire.endTransmission(false);               

  Wire.requestFrom(BQ76952_I2C_ADDR, 2);  
  if (Wire.available() == 2) {
    uint8_t lsb = Wire.read();
    uint8_t msb = Wire.read();
    return (msb << 8) | lsb;  
  }
  return 0xFFFF;  
}

void enterConfigUpdateMode() {
  writeSubcommand(0x0090);  // ENTER_CFG_UPDATE
  delay(100);

  // Wait for CFGUPDATE bit to be set in BatteryStatus (0x12), bit 0
  bool entered = false;
  for (int i = 0; i < 50; i++) {
    uint16_t batteryStatus = readWord(0x12);
    Serial.print("batteryStatus (0x12): ");
    Serial.println(batteryStatus, BIN);
    if (batteryStatus & (1 << 0)) {
      Serial.println("Entered CONFIG_UPDATE mode.");
      entered = true;
      break;
    }
    delay(100);
  }

  if (!entered) {
    Serial.println("Failed to enter CONFIG_UPDATE mode.");
  } else {
    delay(1000);
    writeSubcommand(0x0092);  // EXIT_CFG_UPDATE
    delay(100);
    Serial.println("Exited CONFIG_UPDATE mode.");
    delay(1000);
    uint16_t batteryStatus = readWord(0x12);
    Serial.print("batteryStatus (0x12): ");
    Serial.println(batteryStatus, BIN);
  }
}

void writeSubcommand(uint16_t command) {
  Wire.beginTransmission(0x08);               // Correct I2C address (0x08)
  Wire.write(0x3E);                           // Subcommand register (0x00)
  Wire.write((byte)command & 0x00FF);         // LSB
  Wire.write((byte)(command >> 8) & 0x00FF);  // MSB
  Wire.endTransmission();
  delay(10);  // Short delay after sending
}