UINT的结构Bitfield转换

Question

我正在努力编写AC类，其中包含几个应该转换为UINT8_T的联合结构Bitfields。 是的，我知道这是一种危险的设计，因为它依赖于体系结构...但是请帮助我以这种方式进行修复。

我的完整代码可以在此处找到： （最有可能的）关键零件是

template <uint16_t MCP3x6x_DEVICE_TYPE>
class MCP3x6x {
  typedef union {
    struct {
      enum adc_mode        : 2;
      enum cs_sel cs_sel   : 2;
      enum clk_sel clk_sel : 2;
      uint8_t config0      : 2;
    } config0 = MCP3x6x_DEFAULT_CONFIG0;

    inline status_t write() { return _write(_data, MCP3x6x_CMD_IWRITE | MCP3x6x_ADR_CONFIG0); };
    inline status_t read() { return _read(_data, MCP3x6x_CMD_IREAD | MCP3x6x_ADR_CONFIG0); };

   private:
    uint8_t _data;
  } config0_t;


  union {
    struct registers{
      config0_t config0;
// ...other members...
    } settings_default = {MCP3x6x_DEFAULT_CONFIG0, MCP3x6x_DEFAULT_CONFIG1,   MCP3x6x_DEFAULT_CONFIG2,
                  MCP3x6x_DEFAULT_CONFIG3, MCP3x6x_DEFAULT_IRQ,       MCP3x6x_DEFAULT_MUX,
                  MCP3x6x_DEFAULT_SCAN,    MCP3x6x_DEFAULT_TIMER,     MCP3x6x_DEFAULT_OFFSETCAL,
                  MCP3x6x_DEFAULT_GAINCAL, MCP3x6x_DEFAULT_RESERVED1, MCP3x6x_DEFAULT_RESERVED2,
                  MCP3x6x_DEFAULT_LOCK,    MCP3x6x_DEVICE_TYPE, 0x0000};

    inline status_t write() {
      return _write(settings, MCP3x6x_CMD_IWRITE | MCP3x6x_ADR_CONFIG0, 28);
    };
    inline status_t read() {
      return _read(this->_data, MCP3x6x_CMD_IREAD | MCP3x6x_ADR_CONFIG0, 28);
    };

   private:
    uint8_t _data[28];
  } settings;
}

错误日志

In file included from /home/user/Projects/lib_MCP3x6x/examples/analogRead/analogRead.ino:11:
src/MCP3x6x.h: In instantiation of 'constexpr MCP3x6x<15>::<unnamed union>::<constructor>()':
src/MCP3x6x.h:381:62:   required from 'MCP3x6x<MCP3x6x_DEVICE_TYPE>::MCP3x6x(uint8_t, SPIClass*) [with short unsigned int MCP3x6x_DEVICE_TYPE = 15; uint8_t = unsigned char]'
/home/user/Projects/lib_MCP3x6x/examples/analogRead/analogRead.ino:13:9:   required from here
src/MCP3x6x.h:364:27: error: could not convert 'MCP3x6x_DEFAULT_CONFIG0' from 'const uint8_t' {aka 'const unsigned char'} to 'MCP3x6x<15>::config0_t'
  364 |     } settings_default = {MCP3x6x_DEFAULT_CONFIG0, MCP3x6x_DEFAULT_CONFIG1,   MCP3x6x_DEFAULT_CONFIG2,
      |                           ^~~~~~~~~~~~~~~~~~~~~~~
      |                           |
      |                           const uint8_t {aka const unsigned char}

完整错误日志：

According to the error src/MCP3x6x.h:369:19: error: could not convert 'MCP3x6x_DEFAULT_CONFIG0' from 'const uint8_t' {aka 'const unsigned char'} to 'MCP3x6x<15> ; :: config0_t' default_config0（= uint_8t）的值无法转换为我不知道如何解决的config0_t，我会怀疑在同一联盟中_data会发生这种情况。 哦，使用这些枚举似乎也打破了一些东西，没有弄清楚那是什么。