Advantech ITA-3630 Series User Manual page 68

Intel gen2/gen3 coretm i7/i5/i3 fanless dual core compact industrial computer with wide voltage input

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data &= 0xfe;//bit 0 is set as 0

smbus_write_byte(0x40, 0x03, data)//Write back. GPIO 00 is set for output

data = smbus_read_byte(0x40, 0x01)//Read slave 0x40 register 1

data |= 0x01;//bit 0 is set as 1 which stands for high

smbus_write_byte(0x40, 0x01, data)//Write back. Output high value

Read Input Value from GPIO 07:

data = smbus_read_byte(0x40, 0x03);//Read slave 0x40 register 3 byte

data |= 0x80;//bit 7??1

smbus_write_byte(0x40, 0x03, data)//Write back. GPIO 07 is set for input

data = smbus_read_byte(0x40, 0x00)//Read slave 0x40 register 0. Then,

the response value of bit 7 should know whether the input is low or high

ITA-3630 User Manual

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