-- Edited from record_demo.lua: the recorded 'rd' became a check().
i2c.addr(0x58)
i2c.write(0x10, 0x01)
i2c.set(0x11, 0x0C)
i2c.clr(0x11, 0x04)
local v = i2c.read(0x10)
check(v == 0x01, "register 0x10 reads back 0x01")