diff options
Diffstat (limited to 'decoders/sdcard_spi')
| -rw-r--r-- | decoders/sdcard_spi/pd.py | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/decoders/sdcard_spi/pd.py b/decoders/sdcard_spi/pd.py index de88698..5bb446a 100644 --- a/decoders/sdcard_spi/pd.py +++ b/decoders/sdcard_spi/pd.py @@ -54,6 +54,7 @@ class Decoder(srd.Decoder): self.ss, self.es = 0, 0 self.ss_bit, self.es_bit = 0, 0 self.ss_cmd, self.es_cmd = 0, 0 + self.ss_busy, self.es_busy = 0, 0 self.cmd_token = [] self.cmd_token_bits = [] self.is_acmd = False # Indicates CMD vs. ACMD @@ -64,6 +65,7 @@ class Decoder(srd.Decoder): self.cmd24_start_token_found = False self.is_cmd17 = False self.cmd17_start_token_found = False + self.busy_first_byte = False def start(self): self.out_ann = self.register(srd.OUTPUT_ANN) @@ -437,7 +439,29 @@ class Decoder(srd.Decoder): ann_class = 24 if ann_class is not None: self.put(self.ss, self.es, self.out_ann, [ann_class, ['Data Response']]) - self.state = 'IDLE' + if self.is_cmd24: + # We just send a block of data to be written to the card, + # this takes some time. + self.state = 'WAIT WHILE CARD BUSY' + self.busy_first_byte = True + else: + self.state = 'IDLE' + + def wait_while_busy(self, miso): + if miso != 0x00: + ann_class = None + if self.is_cmd24: + ann_class = 24 + if ann_class is not None: + self.put(self.ss_busy, self.es_busy, self.out_ann, [24, ['Card is busy']]) + self.state = 'IDLE' + return + else: + if self.busy_first_byte: + self.ss_busy = self.ss + self.busy_first_byte = False + else: + self.es_busy = self.es def decode(self, ss, es, data): ptype, mosi, miso = data @@ -491,3 +515,5 @@ class Decoder(srd.Decoder): self.handle_data_cmd24(mosi) elif self.state == 'DATA RESPONSE': self.handle_data_response(miso) + elif self.state == 'WAIT WHILE CARD BUSY': + self.wait_while_busy(miso) |