Posted on October 05, 2017 at 07:58
I am under test for I2C.
Setting of CubeMX does not allow the pullup/down setting.
The I2C device used is htu-21d (Humidity and Humidity Sensor).
--source code--
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i2cTxData = (uint8_t)0xe3; // temp
while(HAL_I2C_Master_Transmit(&hi2c1,(uint16_t)HTDU21D_ADDRESS,(uint8_t *)&i2cTxData,1,1000)!=HAL_OK);
<�� Stop this line
HAL_Delay(50);
while(HAL_I2C_Master_Receive (&hi2c1,(uint16_t)HTDU21D_ADDRESS,(uint8_t *)i2cRxData,6,1000)!=HAL_OK);
double temp = -46.85 + 0.002681 * ((i2cRxData[0]<<8)|i2cRxData[1]);
i2cTxData = (uint8_t)0xe5; // humi
while(HAL_I2C_Master_Transmit(&hi2c1,(uint16_t)HTDU21D_ADDRESS,(uint8_t *)&i2cTxData,1,1000)!=HAL_OK);
HAL_Delay(16);
while(HAL_I2C_Master_Receive (&hi2c1,(uint16_t)HTDU21D_ADDRESS,(uint8_t *)i2cRxData,3,1000)!=HAL_OK);
double humi = -6.0 + 0.001907 * (((i2cRxData[0]<<8)|i2cRxData[1])^0x02);
sprintf(str,''%10.5lf:%10.5lf\r\n'',temp,humi);
HAL_UART_Transmit(&huart2,(uint8_t *)str,strlen(str),1000);
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#i2c #stm32f103c8t6 #htu-21d