diff options
Diffstat (limited to 'decoders/rtc8564')
| -rw-r--r-- | decoders/rtc8564/rtc8564.py | 36 |
1 files changed, 14 insertions, 22 deletions
diff --git a/decoders/rtc8564/rtc8564.py b/decoders/rtc8564/rtc8564.py index d2838e3..2e2f10f 100644 --- a/decoders/rtc8564/rtc8564.py +++ b/decoders/rtc8564/rtc8564.py @@ -22,14 +22,6 @@ import sigrokdecode as srd -# States -IDLE = 0 -GET_SLAVE_ADDR = 1 -GET_REG_ADDR = 2 -READ_RTC_REGS = 3 -READ_RTC_REGS2 = 4 -WRITE_RTC_REGS = 5 - # Return the specified BCD number (max. 8 bits) as integer. def bcd2int(b): return (b & 0x0f) + ((b >> 4) * 10) @@ -56,7 +48,7 @@ class Decoder(srd.Decoder): ] def __init__(self, **kwargs): - self.state = IDLE + self.state = 'IDLE' self.hours = -1 self.minutes = -1 self.seconds = -1 @@ -160,28 +152,28 @@ class Decoder(srd.Decoder): self.ss, self.es = ss, es # State machine. - if self.state == IDLE: + if self.state == 'IDLE': # Wait for an I2C START condition. if cmd != 'START': return - self.state = GET_SLAVE_ADDR + self.state = 'GET SLAVE ADDR' self.block_start_sample = ss - elif self.state == GET_SLAVE_ADDR: + elif self.state == 'GET SLAVE ADDR': # Wait for an address write operation. # TODO: We should only handle packets to the RTC slave (0xa2/0xa3). if cmd != 'ADDRESS WRITE': return - self.state = GET_REG_ADDR - elif self.state == GET_REG_ADDR: + self.state = 'GET REG ADDR' + elif self.state == 'GET REG ADDR': # Wait for a data write (master selects the slave register). if cmd != 'DATA WRITE': return self.reg = databyte - self.state = WRITE_RTC_REGS - elif self.state == WRITE_RTC_REGS: + self.state = 'WRITE RTC REGS' + elif self.state == 'WRITE RTC REGS': # If we see a Repeated Start here, it's probably an RTC read. if cmd == 'START REPEAT': - self.state = READ_RTC_REGS + self.state = 'READ RTC REGS' return # Otherwise: Get data bytes until a STOP condition occurs. if cmd == 'DATA WRITE': @@ -195,18 +187,18 @@ class Decoder(srd.Decoder): self.years, self.hours, self.minutes, self.seconds) self.put(self.block_start_sample, es, self.out_ann, [0, ['Written date/time: %s' % d]]) - self.state = IDLE + self.state = 'IDLE' else: pass # TODO - elif self.state == READ_RTC_REGS: + elif self.state == 'READ RTC REGS': # Wait for an address read operation. # TODO: We should only handle packets to the RTC slave (0xa2/0xa3). if cmd == 'ADDRESS READ': - self.state = READ_RTC_REGS2 + self.state = 'READ RTC REGS2' return else: pass # TODO - elif self.state == READ_RTC_REGS2: + elif self.state == 'READ RTC REGS2': if cmd == 'DATA READ': handle_reg = getattr(self, 'handle_reg_0x%02x' % self.reg) handle_reg(databyte) @@ -217,7 +209,7 @@ class Decoder(srd.Decoder): self.years, self.hours, self.minutes, self.seconds) self.put(self.block_start_sample, es, self.out_ann, [0, ['Read date/time: %s' % d]]) - self.state = IDLE + self.state = 'IDLE' else: pass # TODO? else: |