import sigrokdecode as srd
+NUM_OUTPUT_CHANNELS = 8
+
+def logic_channels(num_channels):
+ l = []
+ for i in range(num_channels):
+ l.append(tuple(['p%d' % i, 'P-port input/output %d' % i]))
+ return tuple(l)
+
class Decoder(srd.Decoder):
api_version = 3
id = 'tca6408a'
desc = 'Texas Instruments TCA6408A 8-bit I²C I/O expander.'
license = 'gplv2+'
inputs = ['i2c']
- outputs = ['tca6408a']
+ outputs = []
tags = ['Embedded/industrial', 'IC']
annotations = (
('register', 'Register type'),
('value', 'Register value'),
- ('warnings', 'Warning messages'),
+ ('warning', 'Warning'),
)
+ logic_output_channels = logic_channels(NUM_OUTPUT_CHANNELS)
annotation_rows = (
('regs', 'Registers', (0, 1)),
('warnings', 'Warnings', (2,)),
self.state = 'IDLE'
self.chip = -1
+ self.logic_output_es = 0
+ self.logic_value = 0
+
def start(self):
self.out_ann = self.register(srd.OUTPUT_ANN)
+ self.out_logic = self.register(srd.OUTPUT_LOGIC)
+
+ def flush(self):
+ self.put_logic_states()
def putx(self, data):
self.put(self.ss, self.es, self.out_ann, data)
+ def put_logic_states(self):
+ if (self.es > self.logic_output_es):
+ data = bytes([self.logic_value])
+ self.put(self.logic_output_es, self.es, self.out_logic, [0, data])
+ self.logic_output_es = self.es
+
def handle_reg_0x00(self, b):
self.putx([1, ['State of inputs: %02X' % b]])
+ # TODO
def handle_reg_0x01(self, b):
- self.putx([1, ['Outputs set: %02X' % b ]])
+ self.put_logic_states()
+ self.putx([1, ['Outputs set: %02X' % b]])
+ self.logic_value = b
def handle_reg_0x02(self, b):
self.putx([1, ['Polarity inverted: %02X' % b]])