多个I2C总线

你好，

感谢你的及时回复。我只在其中一个总线上使用MCP9600S测试了硬件设置，但它有效。我还没有设计电路板以测试完整的系统。如果有人有兴趣，这是这个设置的代码片段

void sensor_init（）{adc_calibrate（）;adc_timer [0] = app_easy_timer（adc_timer_delay [0]，readadc0）;//检查定时器是否可用（int a = 0; a <1; a ++）{if（adc_timer [a] ==yeasy_timer_invalid_timer）{whis（1）; // badbadbad}} // for mcp放大器：boolinit_error = false;READ_ADC [0] = 1;init_i2c（）;for（Uint8_t i = 0; i <1; i ++）{//初始化1总线（8 max）set_i2c_bus（i + 1）; // 1索引（UInt8_t a = 0; <2; a ++）{//初始化2个传感器（（8 max）IF（！init_mcp（a））// 0索引init_rure;}}}}}}}}}}}} void init_i2c（void）{//初始化mcp芯片gpio_configurepin的i2c总线（i2c_scl_port，i2c_scl_pin，input_pullup，pid_i2c_scl，false）; //不要配置SDA PIN you} void set_i2c_bus（uint8_t总线）{//选择哪些数据线用于i2c //从pid_i2c_sda //释放其他引脚，我认为这可能是更清晰的使用最后一个引脚被跟踪...... GPIO_ConfigurePin（I2C_SDA1_PORT，I2C_SDA1_PIN，INPUT，PID_GPIO，FALSE）; GPIO_ConfigurePin（I2C_SDA2_PORT，I2C_SDA2_PIN，INPUT，PID_GPIO，FALSE）; GPIO_ConfigurePin（I2C_SDA3_PORT，I2C_SDA3_PIN，INPUT，PID_GPIO，FALSE）; GPIO_ConfigurePin（I2C_SDA4_PORT，I2C_SDA4_PIN，INPUT，PID_GPIO，FALSE）; GPIO_CONFIGUREPIN（I2C_SDA5_POR，I2C_SDA5_PIN，INPUT，PID_GPIO，FALSE）; GPIO_CONFIGUREPIN（I2C_SDA6_PORT，I2C_SDA6_PIN，INPUT，PID_GPIO，FALSE）; GPIO_CONFIGUREPIN（I2C_SDA7_PORT，I2C_SDA7_PIN，INPUT，PID_GPIO，FALSE）; GPIO_ConfigurePin(I2C_SDA8_PORT, I2C_SDA8_PIN, INPUT, PID_GPIO, false); //set the new bus pin to PID_I2C_SDA switch(bus){ case 1: GPIO_ConfigurePin(I2C_SDA1_PORT, I2C_SDA1_PIN, INPUT, PID_I2C_SDA, false); break; case 2: GPIO_ConfigurePin(I2C_SDA2_PORT, I2C_SDA2_PIN, INPUT, PID_I2C_SDA, false); break; case 3: GPIO_ConfigurePin(I2C_SDA3_PORT, I2C_SDA3_PIN, INPUT, PID_I2C_SDA, false); break; case 4: GPIO_ConfigurePin(I2C_SDA4_PORT, I2C_SDA4_PIN, INPUT, PID_I2C_SDA, false); break; case 5: GPIO_ConfigurePin(I2C_SDA5_PORT, I2C_SDA5_PIN, INPUT, PID_I2C_SDA, false); break; case 6: GPIO_ConfigurePin(I2C_SDA6_PORT, I2C_SDA6_PIN, INPUT, PID_I2C_SDA, false); break; case 7: GPIO_ConfigurePin(I2C_SDA7_PORT, I2C_SDA7_PIN, INPUT, PID_I2C_SDA, false); break; case 8: GPIO_ConfigurePin(I2C_SDA8_PORT, I2C_SDA8_PIN, INPUT, PID_I2C_SDA, false); break; } } bool init_MCP(uint8_t addr){ user_i2c_init(0x60+addr, I2C_7BIT_ADDR, I2C_STANDARD, I2C_1BYTE_REGISTER, I2C_1BYTE_ADDR); //device config register, 0.0625°C ambient accuracy, 18-bit, 1 sample, shutdown mode: 0b00000001 (highest accuracy settings) if(i2c_write_2byte_MCP(0x06, 0x02)!=I2C_NO_ERROR) return 0; //initialize next sample: device status register 0x04, clear bit7 to start sample, other bits can be cleared too if(i2c_write_2byte_MCP(0x04, 0x00)!=I2C_NO_ERROR) return 0; SetWord16(I2C_ENABLE_REG, 0x0); // Disable the I2C controller SetBits16(CLK_PER_REG, I2C_ENABLE, 0); // Disable clock for I2C return 1; } uint16_t read_MCP(uint8_t addr){//read the MCP, assuming the temperature is ready user_i2c_init(0x60+addr, I2C_7BIT_ADDR, I2C_STANDARD, I2C_1BYTE_REGISTER, I2C_1BYTE_ADDR); uint16_t value=0; //device config register, 0.0625°C ambient accuracy, 18-bit, 1 sample, shutdown mode: 0b00000001 (highest accuracy settings) if(i2c_write_2byte_MCP(0x06, 0x02)!=I2C_NO_ERROR) return 0; //select register to read by first writing to select it: 0x00 for hot, 0x02 for cold(chip) temperature if(i2c_write_byte_MCP(0x00)!=I2C_NO_ERROR) value=0xFFFF; //read the two bytes from the register if(i2c_read_2byte_MCP(&value)!=I2C_NO_ERROR) value=0xFFFF; //initialize next sample: device status register, clear bit7 to start sample, other bits can be cleared too if(i2c_write_2byte_MCP(0x04, 0x00)!=I2C_NO_ERROR) value=0xFFFF; SetWord16(I2C_ENABLE_REG, 0x0); // Disable the I2C controller SetBits16(CLK_PER_REG, I2C_ENABLE, 0); // Disable clock for I2C return value;//right shift by 4 to get integer temperature (or do temp °C = MSB*16+LSB/16 if greater than 0) } #define I2C_SCL_PORT GPIO_PORT_0//pin 1 on QFN40 chip #define I2C_SCL_PIN GPIO_PIN_0 #define I2C_SDA1_PORT GPIO_PORT_0//pin 2 on QFN40 chip #define I2C_SDA1_PIN GPIO_PIN_1 #define I2C_SDA2_PORT GPIO_PORT_0//pin 3 on QFN40 chip #define I2C_SDA2_PIN GPIO_PIN_2 #define I2C_SDA3_PORT GPIO_PORT_0 #define I2C_SDA3_PIN GPIO_PIN_3 #define I2C_SDA4_PORT GPIO_PORT_2//would use P0_4, but used by UART #define I2C_SDA4_PIN GPIO_PIN_0 #define I2C_SDA5_PORT GPIO_PORT_3 #define I2C_SDA5_PIN GPIO_PIN_0 #define I2C_SDA6_PORT GPIO_PORT_2//would use P0_5 but used by UART #define I2C_SDA6_PIN GPIO_PIN_9 #define I2C_SDA7_PORT GPIO_PORT_2 #define I2C_SDA7_PIN GPIO_PIN_1 #define I2C_SDA8_PORT GPIO_PORT_1//would use P0_6 but used by UART #define I2C_SDA8_PIN GPIO_PIN_2