## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+## along with this program; if not, see <http://www.gnu.org/licenses/>.
##
import sigrokdecode as srd
timing = {
'START LOW' : {'min': 750, 'max': 25000},
'START HIGH' : {'min': 10, 'max': 10000},
- 'RESPONSE LOW' : {'min': 70, 'max': 90},
- 'RESPONSE HIGH' : {'min': 70, 'max': 90},
+ 'RESPONSE LOW' : {'min': 50, 'max': 90},
+ 'RESPONSE HIGH' : {'min': 50, 'max': 90},
'BIT LOW' : {'min': 45, 'max': 90},
'BIT 0 HIGH' : {'min': 20, 'max': 35},
'BIT 1 HIGH' : {'min': 65, 'max': 80},
pass
class Decoder(srd.Decoder):
- api_version = 2
+ api_version = 3
id = 'am230x'
- name = 'AM230x/DHTxx'
- longname = 'Aosong AM230x/DHTxx'
- desc = 'Aosong AM230x/DHTxx humidity/temperature sensor protocol.'
+ name = 'AM230x/DHTxx/RHTxx'
+ longname = 'Aosong AM230x/DHTxx/RHTxx'
+ desc = 'Aosong AM230x/DHTxx/RHTxx humidity/temperature sensor protocol.'
license = 'gplv2+'
inputs = ['logic']
outputs = ['am230x']
{'id': 'sda', 'name': 'SDA', 'desc': 'Single wire serial data line'},
)
options = (
- {'id': 'dht11', 'desc': 'DHT11 compatibility mode',
- 'default': 'no', 'values': ('no', 'yes')},
+ {'id': 'device', 'desc': 'Device type',
+ 'default': 'am230x', 'values': ('am230x/rht', 'dht11')},
)
annotations = (
('start', 'Start'),
def reset(self):
self.state = 'WAIT FOR START LOW'
- self.samplenum = 0
self.fall = 0
self.rise = 0
self.bits = []
def calculate_humidity(self, bitlist):
h = 0
- if self.options['dht11'] == 'yes':
+ if self.options['device'] == 'dht11':
h = self.bits2num(bitlist[0:8])
else:
h = self.bits2num(bitlist) / 10
def calculate_temperature(self, bitlist):
t = 0
- if self.options['dht11'] == 'yes':
+ if self.options['device'] == 'dht11':
t = self.bits2num(bitlist[0:8])
else:
t = self.bits2num(bitlist[1:]) / 10
checksum += self.bits2num(bitlist[i-8:i])
return checksum % 256
- def __init__(self, **kwargs):
+ def __init__(self):
self.samplerate = None
self.reset()
def start(self):
self.out_ann = self.register(srd.OUTPUT_ANN)
+ # Assume that the initial pin state is high (logic 1).
+ self.initial_pins = [1]
+
def metadata(self, key, value):
if key != srd.SRD_CONF_SAMPLERATE:
return
for t in timing[e]:
self.cnt[e][t] = timing[e][t] * self.samplerate / 1000000
- def decode(self, ss, es, data):
+ def handle_byte(self, bit):
+ self.bits.append(bit)
+ self.putfs([2, ['Bit: %d' % bit, '%d' % bit]])
+ self.fall = self.samplenum
+ self.state = 'WAIT FOR BIT HIGH'
+ if len(self.bits) % 8 == 0:
+ byte = self.bits2num(self.bits[-8:])
+ self.putb([4, ['Byte: %#04x' % byte, '%#04x' % byte]])
+ if len(self.bits) == 16:
+ h = self.calculate_humidity(self.bits[-16:])
+ self.putv([5, ['Humidity: %.1f %%' % h, 'RH = %.1f %%' % h]])
+ elif len(self.bits) == 32:
+ t = self.calculate_temperature(self.bits[-16:])
+ self.putv([6, ['Temperature: %.1f °C' % t, 'T = %.1f °C' % t]])
+ elif len(self.bits) == 40:
+ parity = self.bits2num(self.bits[-8:])
+ if parity == self.calculate_checksum(self.bits[0:32]):
+ self.putb([7, ['Checksum: OK', 'OK']])
+ else:
+ self.putb([7, ['Checksum: not OK', 'NOK']])
+ self.state = 'WAIT FOR END'
+ self.bytepos.append(self.samplenum)
+
+ def decode(self):
if not self.samplerate:
raise SamplerateError('Cannot decode without samplerate.')
- for (self.samplenum, (sda,)) in data:
+ while True:
# State machine.
if self.state == 'WAIT FOR START LOW':
- if sda != 0:
- continue
+ self.wait({0: 'f'})
self.fall = self.samplenum
self.state = 'WAIT FOR START HIGH'
elif self.state == 'WAIT FOR START HIGH':
- if sda != 1:
- continue
+ self.wait({0: 'r'})
if self.is_valid('START LOW'):
self.rise = self.samplenum
self.state = 'WAIT FOR RESPONSE LOW'
else:
self.reset()
elif self.state == 'WAIT FOR RESPONSE LOW':
- if sda != 0:
- continue
+ self.wait({0: 'f'})
if self.is_valid('START HIGH'):
self.putfs([0, ['Start', 'S']])
self.fall = self.samplenum
else:
self.reset()
elif self.state == 'WAIT FOR RESPONSE HIGH':
- if sda != 1:
- continue
+ self.wait({0: 'r'})
if self.is_valid('RESPONSE LOW'):
self.rise = self.samplenum
self.state = 'WAIT FOR FIRST BIT'
else:
self.reset()
elif self.state == 'WAIT FOR FIRST BIT':
- if sda != 0:
- continue
+ self.wait({0: 'f'})
if self.is_valid('RESPONSE HIGH'):
self.putfs([1, ['Response', 'R']])
self.fall = self.samplenum
self.bytepos.append(self.samplenum)
self.state = 'WAIT FOR BIT HIGH'
else:
- self.reset_variables()
+ self.reset()
elif self.state == 'WAIT FOR BIT HIGH':
- if sda != 1:
- continue
+ self.wait({0: 'r'})
if self.is_valid('BIT LOW'):
self.rise = self.samplenum
self.state = 'WAIT FOR BIT LOW'
else:
self.reset()
elif self.state == 'WAIT FOR BIT LOW':
- if sda != 0:
- continue
+ self.wait({0: 'f'})
if self.is_valid('BIT 0 HIGH'):
bit = 0
elif self.is_valid('BIT 1 HIGH'):
else:
self.reset()
continue
- self.bits.append(bit)
- self.putfs([2, ['Bit: %d' % bit, '%d' % bit]])
- self.fall = self.samplenum
- self.state = 'WAIT FOR BIT HIGH'
- if len(self.bits) % 8 == 0:
- byte = self.bits2num(self.bits[-8:])
- self.putb([4, ['Byte: %#04x' % byte, '%#04x' % byte]])
- if len(self.bits) == 16:
- h = self.calculate_humidity(self.bits[-16:])
- self.putv([5, ['Humidity: %.1f %%' % h, 'RH = %.1f %%' % h]])
- elif len(self.bits) == 32:
- t = self.calculate_temperature(self.bits[-16:])
- self.putv([6, ['Temperature: %.1f °C' % t, 'T = %.1f °C' % t]])
- elif len(self.bits) == 40:
- parity = self.bits2num(self.bits[-8:])
- if parity == self.calculate_checksum(self.bits[0:32]):
- self.putb([7, ['Checksum: OK', 'OK']])
- else:
- self.putb([7, ['Checksum: not OK', 'NOK']])
- self.state = 'WAIT FOR END'
- self.bytepos.append(self.samplenum)
+ self.handle_byte(bit)
elif self.state == 'WAIT FOR END':
- if sda != 1:
- continue
+ self.wait({0: 'r'})
self.putfs([3, ['End', 'E']])
self.reset()
projects / libsigrokdecode.git / blobdiff