diff options
Diffstat (limited to 'decoders/uart')
| -rw-r--r-- | decoders/uart/pd.py | 60 |
1 files changed, 47 insertions, 13 deletions
diff --git a/decoders/uart/pd.py b/decoders/uart/pd.py index a8bf090..af773b4 100644 --- a/decoders/uart/pd.py +++ b/decoders/uart/pd.py @@ -31,7 +31,7 @@ This is the list of <ptype>s and their respective <pdata> values: - 'STARTBIT': The data is the (integer) value of the start bit (0/1). - 'DATA': This is always a tuple containing two items: - 1st item: the (integer) value of the UART data. Valid values - range from 0 to 512 (as the data can be up to 9 bits in size). + range from 0 to 511 (as the data can be up to 9 bits in size). - 2nd item: the list of individual data bits and their ss/es numbers. - 'PARITYBIT': The data is the (integer) value of the parity bit (0/1). - 'STOPBIT': The data is the (integer) value of the stop bit (0 or 1). @@ -272,24 +272,58 @@ class Decoder(srd.Decoder): self.putpx(rxtx, ['DATA', rxtx, (self.datavalue[rxtx], self.databits[rxtx])]) - b, f = self.datavalue[rxtx], self.options['format'] - if f == 'ascii': - c = chr(b) if b in range(30, 126 + 1) else '[%02X]' % b - self.putx(rxtx, [rxtx, [c]]) - elif f == 'dec': - self.putx(rxtx, [rxtx, [str(b)]]) - elif f == 'hex': - self.putx(rxtx, [rxtx, [hex(b)[2:].zfill(2).upper()]]) - elif f == 'oct': - self.putx(rxtx, [rxtx, [oct(b)[2:].zfill(3)]]) - elif f == 'bin': - self.putx(rxtx, [rxtx, [bin(b)[2:].zfill(8)]]) + b = self.datavalue[rxtx] + formatted = self.format_value(b) + if formatted is not None: + self.putx(rxtx, [rxtx, [formatted]]) self.putbin(rxtx, [rxtx, bytes([b])]) self.putbin(rxtx, [2, bytes([b])]) self.databits[rxtx] = [] + def format_value(self, v): + # Format value 'v' according to configured options. + # Reflects the user selected kind of representation, as well as + # the number of data bits in the UART frames. + + fmt, bits = self.options['format'], self.options['num_data_bits'] + + # Assume "is printable" for values from 32 to including 126, + # below 32 is "control" and thus not printable, above 127 is + # "not ASCII" in its strict sense, 127 (DEL) is not printable, + # fall back to hex representation for non-printables. + if fmt == 'ascii': + if v in range(32, 126 + 1): + return chr(v) + hexfmt = "[{:02X}]" if bits <= 8 else "[{:03X}]" + return hexfmt.format(v) + + # Mere number to text conversion without prefix and padding + # for the "decimal" output format. + if fmt == 'dec': + return "{:d}".format(v) + + # Padding with leading zeroes for hex/oct/bin formats, but + # without a prefix for density -- since the format is user + # specified, there is no ambiguity. + if fmt == 'hex': + digits = (bits + 4 - 1) // 4 + fmtchar = "X" + elif fmt == 'oct': + digits = (bits + 3 - 1) // 3 + fmtchar = "o" + elif fmt == 'bin': + digits = bits + fmtchar = "b" + else: + fmtchar = None + if fmtchar is not None: + fmt = "{{:0{:d}{:s}}}".format(digits, fmtchar) + return fmt.format(v) + + return None + def get_parity_bit(self, rxtx, signal): # If no parity is used/configured, skip to the next state immediately. if self.options['parity_type'] == 'none': |