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| -rw-r--r-- | decoders/st7735/__init__.py | 27 | ||||
| -rw-r--r-- | decoders/st7735/pd.py | 175 |
2 files changed, 202 insertions, 0 deletions
diff --git a/decoders/st7735/__init__.py b/decoders/st7735/__init__.py new file mode 100644 index 0000000..e724af6 --- /dev/null +++ b/decoders/st7735/__init__.py @@ -0,0 +1,27 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2018 Aleksander Alekseev <afiskon@gmail.com> +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; either version 2 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## 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, see <http://www.gnu.org/licenses/>. +## + +''' +This decoder decodes the ST7735 TFT controller protocol. + +Details: +http://www.displayfuture.com/Display/datasheet/controller/ST7735.pdf +''' + +from .pd import Decoder diff --git a/decoders/st7735/pd.py b/decoders/st7735/pd.py new file mode 100644 index 0000000..f704c03 --- /dev/null +++ b/decoders/st7735/pd.py @@ -0,0 +1,175 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2018 Aleksander Alekseev <afiskon@gmail.com> +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; either version 2 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## 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, see <http://www.gnu.org/licenses/>. + +import sigrokdecode as srd + +MAX_DATA_LEN = 128 + +# Command ID -> name, short description +META = { + 0x00: {'name': 'NOP ', 'desc': 'No operation'}, + 0x01: {'name': 'SWRESET', 'desc': 'Software reset'}, + 0x04: {'name': 'RDDID ', 'desc': 'Read display ID'}, + 0x09: {'name': 'RDDST ', 'desc': 'Read display status'}, + 0x10: {'name': 'SLPIN ', 'desc': 'Sleep in & booster off'}, + 0x11: {'name': 'SLPOUT ', 'desc': 'Sleep out & booster on'}, + 0x12: {'name': 'PTLON ', 'desc': 'Partial mode on'}, + 0x13: {'name': 'NORON ', 'desc': 'Partial off (normal)'}, + 0x20: {'name': 'INVOFF ', 'desc': 'Display inversion off'}, + 0x21: {'name': 'INVON ', 'desc': 'Display inversion on'}, + 0x28: {'name': 'DISPOFF', 'desc': 'Display off'}, + 0x29: {'name': 'DISPON ', 'desc': 'Display on'}, + 0x2A: {'name': 'CASET ', 'desc': 'Column address set'}, + 0x2B: {'name': 'RASET ', 'desc': 'Row address set'}, + 0x2C: {'name': 'RAMWR ', 'desc': 'Memory write'}, + 0x2E: {'name': 'RAMRD ', 'desc': 'Memory read'}, + 0x30: {'name': 'PTLAR ', 'desc': 'Partial start/end address set'}, + 0x36: {'name': 'MADCTL ', 'desc': 'Memory data address control'}, + 0x3A: {'name': 'COLMOD ', 'desc': 'Interface pixel format'}, + 0xB1: {'name': 'FRMCTR1', 'desc': 'Frame rate control (in normal mode / full colors)'}, + 0xB2: {'name': 'FRMCTR2', 'desc': 'Frame rate control (in idle mode / 8-colors)'}, + 0xB3: {'name': 'FRMCTR3', 'desc': 'Frame rate control (in partial mode / full colors) '}, + 0xB4: {'name': 'INVCTR ', 'desc': 'Display inversion control'}, + 0xB6: {'name': 'DISSET5', 'desc': 'Display function set 5'}, + 0xC0: {'name': 'PWCTR1 ', 'desc': 'Power control 1'}, + 0xC1: {'name': 'PWCTR2 ', 'desc': 'Power control 2'}, + 0xC2: {'name': 'PWCTR3 ', 'desc': 'Power control 3'}, + 0xC3: {'name': 'PWCTR4 ', 'desc': 'Power control 4'}, + 0xC4: {'name': 'PWCTR5 ', 'desc': 'Power control 5'}, + 0xC5: {'name': 'VMCTR1 ', 'desc': 'VCOM control 1'}, + 0xDA: {'name': 'RDID1 ', 'desc': 'Read ID1'}, + 0xDB: {'name': 'RDID2 ', 'desc': 'Read ID2'}, + 0xDC: {'name': 'RDID3 ', 'desc': 'Read ID3'}, + 0xDD: {'name': 'RDID4 ', 'desc': 'Read ID4'}, + 0xFC: {'name': 'PWCTR6 ', 'desc': 'Power control 6'}, + 0xE0: {'name': 'GMCTRP1', 'desc': 'Gamma \'+\'polarity correction characteristics setting'}, + 0xE1: {'name': 'GMCTRN1', 'desc': 'Gamma \'-\'polarity correction characteristics setting'}, +} + +class Ann: + BITS, CMD, DATA, DESC = range(4) + +class Decoder(srd.Decoder): + api_version = 3 + id = 'st7735' + name = 'ST7735' + longname = 'Sitronix ST7735' + desc = 'Sitronix ST7735 TFT controller protocol.' + license = 'gplv2+' + inputs = ['logic'] + outputs = ['st7735'] + channels = ( + {'id': 'cs', 'name': 'CS#', 'desc': 'Chip-select'}, + {'id': 'clk', 'name': 'CLK', 'desc': 'Clock'}, + {'id': 'mosi', 'name': 'MOSI', 'desc': 'Master out, slave in'}, + {'id': 'dc', 'name': 'DC', 'desc': 'Data or command'} + ) + annotations = ( + ('bit', 'Bit'), + ('command', 'Command'), + ('data', 'Data'), + ('description', 'Description'), + ) + annotation_rows = ( + ('bits', 'Bits', (Ann.BITS,)), + ('fields', 'Fields', (Ann.CMD, Ann.DATA)), + ('description', 'Description', (Ann.DESC,)), + ) + + def __init__(self): + self.reset() + + def reset(self): + pass + + def start(self): + self.out_ann = self.register(srd.OUTPUT_ANN) + + def reset_state(self): + self.accum_byte = 0 + self.accum_bits_num = 0 + self.bit_ss = -1 + self.byte_ss = -1 + self.current_bit = -1 + + def put_desc(self, ss, es, cmd, data): + if cmd == -1: + return + if META[cmd]: + self.put(ss, es, self.out_ann, [Ann.DESC, + ['%s: %s' % (META[cmd]['name'].strip(), META[cmd]['desc'])]]) + else: + # Default description: + dots = '' + if len(data) == MAX_DATA_LEN: + data = data[:-1] + dots = '...' + data_str = '(none)' + if len(data) > 0: + data_str = ' '.join(['%02X' % b for b in data]) + self.put(ss, es, self.out_ann, [Ann.DESC, + ['Unknown command: %02X. Data: %s%s' % (cmd, data_str, dots)]]) + + def decode(self): + current_cmd = -1 + current_data = [] + desc_ss = -1 + desc_es = -1 + self.reset_state() + while True: + # Check data on both CLK edges. + (cs, clk, mosi, dc) = self.wait({1: 'e'}) + + if cs == 1: # Wait for CS = low, ignore the rest. + self.reset_state() + continue + + if clk == 1: + # Read one bit. + self.bit_ss = self.samplenum + if self.accum_bits_num == 0: + self.byte_ss = self.samplenum + self.current_bit = mosi + + if (clk == 0) and (self.current_bit >= 0): + # Process one bit. + self.put(self.bit_ss, self.samplenum, self.out_ann, + [Ann.BITS, [str(self.current_bit)]]) + self.accum_byte = (self.accum_byte << 1) | self.current_bit # MSB-first. + self.accum_bits_num += 1 + if self.accum_bits_num == 8: + # Process one byte. + ann = Ann.DATA if dc else Ann.CMD # DC = low for commands. + self.put(self.byte_ss, self.samplenum, self.out_ann, + [ann, ['%02X' % self.accum_byte]]) + if ann == Ann.CMD: + self.put_desc(desc_ss, desc_es, current_cmd, current_data) + desc_ss = self.byte_ss + desc_es = self.samplenum # For cmds without data. + current_cmd = self.accum_byte + current_data = [] + else: + if len(current_data) < MAX_DATA_LEN: + current_data += [self.accum_byte] + desc_es = self.samplenum + + self.accum_bits_num = 0 + self.accum_byte = 0 + self.byte_ss = -1 + self.current_bit = -1 + self.bit_ss = -1 |