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| author | Uwe Hermann <uwe@hermann-uwe.de> | 2019-04-15 19:40:55 +0200 |
|---|---|---|
| committer | Uwe Hermann <uwe@hermann-uwe.de> | 2019-04-15 19:40:55 +0200 |
| commit | 8f461b610c0887db253dc289471beeb1da6f08ea (patch) | |
| tree | d61ff4c191e015d625533f949bb017afae861455 | |
| parent | dab5420eca0c5d217e8a41a53888c609dd70321b (diff) | |
| download | libsigrokdecode-8f461b610c0887db253dc289471beeb1da6f08ea.tar.gz libsigrokdecode-8f461b610c0887db253dc289471beeb1da6f08ea.zip | |
sdcard_spi: handle_data_response(): Add comment, cosmetics.
| -rw-r--r-- | decoders/sdcard_spi/pd.py | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/decoders/sdcard_spi/pd.py b/decoders/sdcard_spi/pd.py index 5054d9e..1e02756 100644 --- a/decoders/sdcard_spi/pd.py +++ b/decoders/sdcard_spi/pd.py @@ -382,20 +382,30 @@ class Decoder(srd.Decoder): self.cmd24_start_token_found = True def handle_data_response(self, miso): + # Data Response token (1 byte). + # + # Format: + # - Bits[7:5]: Don't care. + # - Bits[4:4]: Always 0. + # - Bits[3:1]: Status. + # - 010: Data accepted. + # - 101: Data rejected due to a CRC error. + # - 110: Data rejected due to a write error. + # - Bits[0:0]: Always 1. miso &= 0x1f if miso & 0x11 != 0x01: # This is not the byte we are waiting for. # Should we return to IDLE here? return - self.put(self.miso_bits[7][1], self.miso_bits[5][2], self.out_ann, [134, ['don\'t care']]) - self.put(self.miso_bits[4][1], self.miso_bits[4][2], self.out_ann, [134, ['0']]) + self.put(self.miso_bits[7][1], self.miso_bits[5][2], self.out_ann, [134, ['Don\'t care']]) + self.put(self.miso_bits[4][1], self.miso_bits[4][2], self.out_ann, [134, ['Always 0']]) if miso == 0x05: self.put(self.miso_bits[3][1], self.miso_bits[1][2], self.out_ann, [134, ['Data accepted']]) elif miso == 0x0b: self.put(self.miso_bits[3][1], self.miso_bits[1][2], self.out_ann, [134, ['Data rejected (CRC error)']]) elif miso == 0x0d: self.put(self.miso_bits[3][1], self.miso_bits[1][2], self.out_ann, [134, ['Data rejected (write error)']]) - self.put(self.miso_bits[0][1], self.miso_bits[0][2], self.out_ann, [134, ['1']]) + self.put(self.miso_bits[0][1], self.miso_bits[0][2], self.out_ann, [134, ['Always 1']]) ann_class = None if self.is_cmd24: ann_class = 24 |