def testMultiByteRead(self):
data = [0x10, 0x01]
self.readTestHelper(data)
self.mox.ReplayAll()
self.bbi2c = bbi2c.BBi2c({'bus_num': 2})
result = self.bbi2c.wr_rd(SLAVE_ADDRESS, [DATA_ADDRESS], len(data))
self.assertEquals(result, data)
def testWriteAndRead(self):
wr_data = [DATA_ADDRESS, 0x8, 0x9]
rd_data = [0x10, 0x01]
self.singleWriteTestHelper(wr_data)
self.readTestHelper(rd_data, send_address=False)
self.mox.ReplayAll()
self.bbi2c = bbi2c.BBi2c({'bus_num': 2})
result = self.bbi2c.wr_rd(SLAVE_ADDRESS, wr_data, len(rd_data))
self.assertEquals(result, rd_data)
def testBlockWriteFailure(self):
data = [0x7, 0x8, 0x9, 0x10, 0x11, 0x12, 0x13]
self.mox.ReplayAll()
self.bbi2c = bbi2c.BBi2c({'bus_num': 2})
with self.assertRaises(bbi2c.BBi2cError):
self.bbi2c.wr_rd(SLAVE_ADDRESS, data, 0)
def testThreeByteWrite(self):
data = [0x7, 0x8, 0x9]
self.singleWriteTestHelper(data)
self.mox.ReplayAll()
self.bbi2c = bbi2c.BBi2c({'bus_num': 2})
self.bbi2c.wr_rd(SLAVE_ADDRESS, data, 0)
def _init_bb_i2c(self, interface):
"""Initalize beaglebone i2c interface."""
return bbi2c.BBi2c(interface)