X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=decoders%2Fjtag%2Fpd.py;h=4ad11c4cccc2b80d12e99f21c0b2e8558e83126d;hp=b44ab527421d1e3f2dfdc5912755929d5190685a;hb=4539e9ca58966ce3c9cad4801b16c315e86ace01;hpb=f7332ee0869cea37577257126acfe40bbe9f4db4 diff --git a/decoders/jtag/pd.py b/decoders/jtag/pd.py index b44ab52..4ad11c4 100644 --- a/decoders/jtag/pd.py +++ b/decoders/jtag/pd.py @@ -14,8 +14,7 @@ ## 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 . ## import sigrokdecode as srd @@ -32,18 +31,15 @@ Packet: 'CAPTURE-DR', 'SHIFT-DR', 'EXIT1-DR', 'PAUSE-DR', 'EXIT2-DR', 'UPDATE-DR', 'SELECT-IR-SCAN', 'CAPTURE-IR', 'SHIFT-IR', 'EXIT1-IR', 'PAUSE-IR', 'EXIT2-IR', 'UPDATE-IR'. - - 'IR TDI BIT': Bit that was clocked into the IR register. - - 'IR TDO BIT': Bit that was clocked out of the IR register. - - 'DR TDI BIT': Bit that was clocked into the DR register. - - 'DR TDO BIT': Bit that was clocked out of the DR register. - 'IR TDI': Bitstring that was clocked into the IR register. - 'IR TDO': Bitstring that was clocked out of the IR register. - 'DR TDI': Bitstring that was clocked into the DR register. - 'DR TDO': Bitstring that was clocked out of the DR register. -All bits are either '1' or '0' characters. -All bitstrings are a sequence of '1' and '0' characters. The right-most -character in the bitstring is the LSB. Example: '01110001' (1 is LSB). +All bitstrings are a list consisting of two items. The first is a sequence +of '1' and '0' characters (the right-most character is the LSB. Example: +'01110001', where 1 is the LSB). The second item is a list of ss/es values +for each bit that is in the bitstring. ''' jtag_states = [ @@ -58,7 +54,7 @@ jtag_states = [ ] class Decoder(srd.Decoder): - api_version = 2 + api_version = 3 id = 'jtag' name = 'JTAG' longname = 'Joint Test Action Group (IEEE 1149.1)' @@ -77,20 +73,33 @@ class Decoder(srd.Decoder): {'id': 'srst', 'name': 'SRST#', 'desc': 'System reset'}, {'id': 'rtck', 'name': 'RTCK', 'desc': 'Return clock signal'}, ) - annotations = tuple([tuple([s.lower(), s]) for s in jtag_states]) + annotations = tuple([tuple([s.lower(), s]) for s in jtag_states]) + ( \ + ('bit-tdi', 'Bit (TDI)'), + ('bit-tdo', 'Bit (TDO)'), + ('bitstring-tdi', 'Bitstring (TDI)'), + ('bitstring-tdo', 'Bitstring (TDO)'), + ) + annotation_rows = ( + ('bits-tdi', 'Bits (TDI)', (16,)), + ('bits-tdo', 'Bits (TDO)', (17,)), + ('bitstrings-tdi', 'Bitstring (TDI)', (18,)), + ('bitstrings-tdo', 'Bitstring (TDO)', (19,)), + ('states', 'States', tuple(range(15 + 1))), + ) - def __init__(self, **kwargs): + def __init__(self): # self.state = 'TEST-LOGIC-RESET' self.state = 'RUN-TEST/IDLE' self.oldstate = None - self.oldpins = (-1, -1, -1, -1) - self.oldtck = -1 self.bits_tdi = [] self.bits_tdo = [] - self.samplenum = 0 + self.bits_samplenums_tdi = [] + self.bits_samplenums_tdo = [] self.ss_item = self.es_item = None + self.ss_bitstring = self.es_bitstring = None self.saved_item = None self.first = True + self.first_bit = True def start(self): self.out_python = self.register(srd.OUTPUT_PYTHON) @@ -102,6 +111,12 @@ class Decoder(srd.Decoder): def putp(self, data): self.put(self.ss_item, self.es_item, self.out_python, data) + def putx_bs(self, data): + self.put(self.ss_bitstring, self.es_bitstring, self.out_ann, data) + + def putp_bs(self, data): + self.put(self.ss_bitstring, self.es_bitstring, self.out_python, data) + def advance_state_machine(self, tms): self.oldstate = self.state @@ -143,7 +158,9 @@ class Decoder(srd.Decoder): elif self.state == 'UPDATE-IR': self.state = 'SELECT-DR-SCAN' if (tms) else 'RUN-TEST/IDLE' - def handle_rising_tck_edge(self, tdi, tdo, tck, tms): + def handle_rising_tck_edge(self, pins): + (tdi, tdo, tck, tms, trst, srst, rtck) = pins + # Rising TCK edges always advance the state machine. self.advance_state_machine(tms) @@ -151,68 +168,67 @@ class Decoder(srd.Decoder): # Save the start sample and item for later (no output yet). self.ss_item = self.samplenum self.first = False - self.saved_item = self.state else: # Output the saved item (from the last CLK edge to the current). self.es_item = self.samplenum - # Output the state we just switched to. - self.putx([jtag_states.index(self.state), [self.state]]) + # Output the old state (from last rising TCK edge to current one). + self.putx([jtag_states.index(self.oldstate), [self.oldstate]]) self.putp(['NEW STATE', self.state]) - self.ss_item = self.samplenum - self.saved_item = self.state - # If we went from SHIFT-IR to SHIFT-IR, or SHIFT-DR to SHIFT-DR, - # collect the current TDI/TDO values (upon rising TCK edge). - if self.state.startswith('SHIFT-') and self.oldstate == self.state: + # Upon SHIFT-IR/SHIFT-DR collect the current TDI/TDO values. + if self.state.startswith('SHIFT-'): + if self.first_bit: + self.ss_bitstring = self.samplenum + self.first_bit = False + else: + self.putx([16, [str(self.bits_tdi[0])]]) + self.putx([17, [str(self.bits_tdo[0])]]) + # Use self.samplenum as ES of the previous bit. + self.bits_samplenums_tdi[0][1] = self.samplenum + self.bits_samplenums_tdo[0][1] = self.samplenum + self.bits_tdi.insert(0, tdi) self.bits_tdo.insert(0, tdo) - self.putx([0, [self.state[-2:] + ' TDI BIT: ' + str(tdi)]]) - self.putx([0, [self.state[-2:] + ' TDO BIT: ' + str(tdo)]]) - self.putp([self.state[-2:] + ' TDI BIT', str(tdi)]) - self.putp([self.state[-2:] + ' TDO BIT', str(tdo)]) + + # Use self.samplenum as SS of the current bit. + self.bits_samplenums_tdi.insert(0, [self.samplenum, -1]) + self.bits_samplenums_tdo.insert(0, [self.samplenum, -1]) # Output all TDI/TDO bits if we just switched from SHIFT-* to EXIT1-*. if self.oldstate.startswith('SHIFT-') and \ self.state.startswith('EXIT1-'): + self.es_bitstring = self.samplenum + t = self.state[-2:] + ' TDI' b = ''.join(map(str, self.bits_tdi)) h = ' (0x%x' % int('0b' + b, 2) + ')' s = t + ': ' + b + h + ', ' + str(len(self.bits_tdi)) + ' bits' - self.putx([0, [s]]) - self.putp([t, b]) + self.putx_bs([18, [s]]) + self.bits_samplenums_tdi[0][1] = self.samplenum # ES of last bit. + self.putp_bs([t, [b, self.bits_samplenums_tdi]]) + self.putx([16, [str(self.bits_tdi[0])]]) # Last bit. self.bits_tdi = [] + self.bits_samplenums_tdi = [] t = self.state[-2:] + ' TDO' b = ''.join(map(str, self.bits_tdo)) h = ' (0x%x' % int('0b' + b, 2) + ')' s = t + ': ' + b + h + ', ' + str(len(self.bits_tdo)) + ' bits' - self.putx([0, [s]]) - self.putp([t, b]) + self.putx_bs([19, [s]]) + self.bits_samplenums_tdo[0][1] = self.samplenum # ES of last bit. + self.putp_bs([t, [b, self.bits_samplenums_tdo]]) + self.putx([17, [str(self.bits_tdo[0])]]) # Last bit. self.bits_tdo = [] + self.bits_samplenums_tdo = [] - def decode(self, ss, es, data): - for (self.samplenum, pins) in data: - - # If none of the pins changed, there's nothing to do. - if self.oldpins == pins: - continue - - # Store current pin values for the next round. - self.oldpins = pins - - # Get individual pin values into local variables. - # Unused channels will have a value of > 1. - (tdi, tdo, tck, tms, trst, srst, rtck) = pins - - # We only care about TCK edges (either rising or falling). - if (self.oldtck == tck): - continue + self.first_bit = True - # Store start/end sample for later usage. - self.ss, self.es = ss, es + self.ss_bitstring = self.samplenum - if (self.oldtck == 0 and tck == 1): - self.handle_rising_tck_edge(tdi, tdo, tck, tms) + self.ss_item = self.samplenum - self.oldtck = tck + def decode(self): + while True: + # Wait for a rising edge on TCK. + self.handle_rising_tck_edge(self.wait({2: 'r'}))