i2c_flag_get(i2c_mgr->periph, I2C_FLAG_RBNE)){if ((timeout--) == 0){LOG_DIRECT_ERR("...
if (i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_RBNE)) { uint8_t data = i2c_data_receive(...
I2C_Status I2Cx_Read_NBytes(uint32_t I2Cx,uint8_t driver_Addr, uint16_t start_Addr, uint8_t number_Bytes, uint8_t *read_Buffer,uint8_t ADDR_Length){ uint32_t I2C_Timeout = I2C_SHORT_TIMEOUT;i2c_ack_config(I2Cx,I2C_ACK_ENABLE); while(i2c_flag_get(I2Cx, I2C_FLAG_I2CBSY))...
while(!i2c_flag_get(I2Cx, I2C_FLAG_ADDSEND)) { if((I2C_Timeout--) == 0) { Resume_IIC(I2C_LONG_TIMEOUT,I2Cx); return I2C_FAIL; } } /* clear the ADDSEND bit */ i2c_flag_clear(I2Cx,I2C_FLAG_ADDSEND); if(number_Bytes==1) { i2c_stop_on_bus(I2Cx); } while(number_Byte...
if(i2c_flag_get(I2Cx, I2C_FLAG_RBNE)){ /* read a byte from the EEPROM */ *read_Buffer = i2c_data_receive(I2Cx); /* point to the next location where the byte read will be saved */ read_Buffer++; /* decrement the read bytes counter */ ...
如图下图所示为7位地址方式下的I2C数据传输格式,第一个字节由7位从地址和R/~W读/写位组成。不论总线上传送的是地址还是数据信息,每个字节传输完毕,接收设备都会发送响应位(ACK)。地址类信息传输之后是数据信息,直到接收到停止信息。 7 位寻址模式数据格式 ...
while(!i2c_flag_get(I2C0, I2C_FLAG_BTC)); /* send a stop condition to I2C bus */ i2c_stop_on_bus(I2C0); } delay_1ms(1); /* wait until the RBNE bit is set and clear it */ if(i2c_flag_get(I2C0, I2C_FLAG_RBNE)){ ...
{/* wait until BTC bit is set */while(!i2c_flag_get(I2C_BUS[i2c_id], I2C_FLAG_BTC));/* send a stop condition to I2C bus */i2c_stop_on_bus(I2C_BUS[i2c_id]); }/* wait until the RBNE bit is set and clear it */if(i2c_flag_get(I2C_BUS[i2c_id], I2C_FLAG_RBNE)) ...
在起始信号后必须传送一个从机的地址(7位),第8位是数据的传送方向位(R/T),用“0”表示主机发送数据(T),“1”表示主机接收数据(R)。每次数据传送总是由主机产生的终止信号结束。但是,若主机希望继续占用总线进行新的数据传送,则可以不产生终止信号,马上再次发出起始信号对另一从机进行寻址。
if(i2c_flag_get(I2C0, I2C_FLAG_RBNE)){ /* read a byte from the EEPROM */ *pbuf=i2c_...