Compares a device register to a byte value. Communicates with the device directly using the I2C interface.
Name | Required | Type | Description |
---|---|---|---|
register | yes | string | Device register address expressed in hexadecimal. Must be prefixed with 0x and surrounded by double quotes. |
value | yes | string | Expected byte value expressed in hexadecimal. Must be prefixed with 0x and surrounded by double quotes. |
mask | no | string | Bit mask expressed in hexadecimal. Must be prefixed with 0x and surrounded by double quotes. Specifies which bits should be compared within the byte value. Only the bits with a value of 1 in the mask will be compared. |
Returns true if the register contained the expected value, otherwise returns false.
{ "comments": [ "Check if register 0xA0 contains 0xFF" ], "i2c_compare_byte": { "register": "0xA0", "value": "0xFF" } } { "comments": [ "Check if register 0x82 contains 0x40.", "Ignore the most significant bit." ], "i2c_compare_byte": { "register": "0x82", "value": "0x40", "mask": "0x7F" } }