I2C Read/Write in FX2LP - KBA224159
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Version: **
Translation - Japanese: FX2LPでのI2C読み取り/書き込み - KBA224159 - Community Translated (JA)
Question:
How can I perform an I2C read followed by an I2C write in FX2LP?
Answer:
The EZUSB.LIB library can be used for performing I2C read/write in FX2LP. To perform an I2C write and read back the data from an I2C slave device, use the following sequence of commands:
BYTE xdata BUFFER[2];
DATA01[2] = { 0x00, 0xAA } // First byte indicates the internal address of EEPROM
// Second byte indicates the data to be written
//I2C Write
EZUSB_WriteI2C(0x50, 0x02, DATA01); // Write the data to the slave device with address 0x50
EZUSB_WaitForEEPROMWrite(0x50); // Wait until the I2C write is completed
//I2C Read
EZUSB_WriteI2C(0x50, 0x01, DATA01); // Write the internal slave address from which the data is to be read
EZUSB_ReadI2C(0x50, 0x01, BUFFER[0]); // Read the data from the slave device and store it in BUFFER