diff options
author | Damien George <damien.p.george@gmail.com> | 2020-02-27 15:36:53 +1100 |
---|---|---|
committer | Damien George <damien.p.george@gmail.com> | 2020-02-28 10:33:03 +1100 |
commit | 69661f3343bedf86e514337cff63d96cc42f8859 (patch) | |
tree | af5dfb380ffdb75dda84828f63cf9d840d992f0f /drivers/sdcard/sdcard.py | |
parent | 3f39d18c2b884d32f0443e2e8114ff9d7a14d718 (diff) |
all: Reformat C and Python source code with tools/codeformat.py.
This is run with uncrustify 0.70.1, and black 19.10b0.
Diffstat (limited to 'drivers/sdcard/sdcard.py')
-rw-r--r-- | drivers/sdcard/sdcard.py | 88 |
1 files changed, 44 insertions, 44 deletions
diff --git a/drivers/sdcard/sdcard.py b/drivers/sdcard/sdcard.py index fc6787556..c991fe560 100644 --- a/drivers/sdcard/sdcard.py +++ b/drivers/sdcard/sdcard.py @@ -27,15 +27,15 @@ import time _CMD_TIMEOUT = const(100) _R1_IDLE_STATE = const(1 << 0) -#R1_ERASE_RESET = const(1 << 1) +# R1_ERASE_RESET = const(1 << 1) _R1_ILLEGAL_COMMAND = const(1 << 2) -#R1_COM_CRC_ERROR = const(1 << 3) -#R1_ERASE_SEQUENCE_ERROR = const(1 << 4) -#R1_ADDRESS_ERROR = const(1 << 5) -#R1_PARAMETER_ERROR = const(1 << 6) -_TOKEN_CMD25 = const(0xfc) -_TOKEN_STOP_TRAN = const(0xfd) -_TOKEN_DATA = const(0xfe) +# R1_COM_CRC_ERROR = const(1 << 3) +# R1_ERASE_SEQUENCE_ERROR = const(1 << 4) +# R1_ADDRESS_ERROR = const(1 << 5) +# R1_PARAMETER_ERROR = const(1 << 6) +_TOKEN_CMD25 = const(0xFC) +_TOKEN_STOP_TRAN = const(0xFD) +_TOKEN_DATA = const(0xFE) class SDCard: @@ -47,7 +47,7 @@ class SDCard: self.dummybuf = bytearray(512) self.tokenbuf = bytearray(1) for i in range(512): - self.dummybuf[i] = 0xff + self.dummybuf[i] = 0xFF self.dummybuf_memoryview = memoryview(self.dummybuf) # initialise the card @@ -72,7 +72,7 @@ class SDCard: # clock card at least 100 cycles with cs high for i in range(16): - self.spi.write(b'\xff') + self.spi.write(b"\xff") # CMD0: init card; should return _R1_IDLE_STATE (allow 5 attempts) for _ in range(5): @@ -82,7 +82,7 @@ class SDCard: raise OSError("no SD card") # CMD8: determine card version - r = self.cmd(8, 0x01aa, 0x87, 4) + r = self.cmd(8, 0x01AA, 0x87, 4) if r == _R1_IDLE_STATE: self.init_card_v2() elif r == (_R1_IDLE_STATE | _R1_ILLEGAL_COMMAND): @@ -96,15 +96,15 @@ class SDCard: raise OSError("no response from SD card") csd = bytearray(16) self.readinto(csd) - if csd[0] & 0xc0 == 0x40: # CSD version 2.0 + if csd[0] & 0xC0 == 0x40: # CSD version 2.0 self.sectors = ((csd[8] << 8 | csd[9]) + 1) * 1024 - elif csd[0] & 0xc0 == 0x00: # CSD version 1.0 (old, <=2GB) + elif csd[0] & 0xC0 == 0x00: # CSD version 1.0 (old, <=2GB) c_size = csd[6] & 0b11 | csd[7] << 2 | (csd[8] & 0b11000000) << 4 c_size_mult = ((csd[9] & 0b11) << 1) | csd[10] >> 7 self.sectors = (c_size + 1) * (2 ** (c_size_mult + 2)) else: raise OSError("SD card CSD format not supported") - #print('sectors', self.sectors) + # print('sectors', self.sectors) # CMD16: set block length to 512 bytes if self.cmd(16, 512, 0) != 0: @@ -118,7 +118,7 @@ class SDCard: self.cmd(55, 0, 0) if self.cmd(41, 0, 0) == 0: self.cdv = 512 - #print("[SDCard] v1 card") + # print("[SDCard] v1 card") return raise OSError("timeout waiting for v1 card") @@ -130,7 +130,7 @@ class SDCard: if self.cmd(41, 0x40000000, 0) == 0: self.cmd(58, 0, 0, 4) self.cdv = 1 - #print("[SDCard] v2 card") + # print("[SDCard] v2 card") return raise OSError("timeout waiting for v2 card") @@ -148,24 +148,24 @@ class SDCard: self.spi.write(buf) if skip1: - self.spi.readinto(self.tokenbuf, 0xff) + self.spi.readinto(self.tokenbuf, 0xFF) # wait for the response (response[7] == 0) for i in range(_CMD_TIMEOUT): - self.spi.readinto(self.tokenbuf, 0xff) + self.spi.readinto(self.tokenbuf, 0xFF) response = self.tokenbuf[0] if not (response & 0x80): # this could be a big-endian integer that we are getting here for j in range(final): - self.spi.write(b'\xff') + self.spi.write(b"\xff") if release: self.cs(1) - self.spi.write(b'\xff') + self.spi.write(b"\xff") return response # timeout self.cs(1) - self.spi.write(b'\xff') + self.spi.write(b"\xff") return -1 def readinto(self, buf): @@ -173,7 +173,7 @@ class SDCard: # read until start byte (0xff) for i in range(_CMD_TIMEOUT): - self.spi.readinto(self.tokenbuf, 0xff) + self.spi.readinto(self.tokenbuf, 0xFF) if self.tokenbuf[0] == _TOKEN_DATA: break else: @@ -183,15 +183,15 @@ class SDCard: # read data mv = self.dummybuf_memoryview if len(buf) != len(mv): - mv = mv[:len(buf)] + mv = mv[: len(buf)] self.spi.write_readinto(mv, buf) # read checksum - self.spi.write(b'\xff') - self.spi.write(b'\xff') + self.spi.write(b"\xff") + self.spi.write(b"\xff") self.cs(1) - self.spi.write(b'\xff') + self.spi.write(b"\xff") def write(self, token, buf): self.cs(0) @@ -199,42 +199,42 @@ class SDCard: # send: start of block, data, checksum self.spi.read(1, token) self.spi.write(buf) - self.spi.write(b'\xff') - self.spi.write(b'\xff') + self.spi.write(b"\xff") + self.spi.write(b"\xff") # check the response - if (self.spi.read(1, 0xff)[0] & 0x1f) != 0x05: + if (self.spi.read(1, 0xFF)[0] & 0x1F) != 0x05: self.cs(1) - self.spi.write(b'\xff') + self.spi.write(b"\xff") return # wait for write to finish - while self.spi.read(1, 0xff)[0] == 0: + while self.spi.read(1, 0xFF)[0] == 0: pass self.cs(1) - self.spi.write(b'\xff') + self.spi.write(b"\xff") def write_token(self, token): self.cs(0) self.spi.read(1, token) - self.spi.write(b'\xff') + self.spi.write(b"\xff") # wait for write to finish - while self.spi.read(1, 0xff)[0] == 0x00: + while self.spi.read(1, 0xFF)[0] == 0x00: pass self.cs(1) - self.spi.write(b'\xff') + self.spi.write(b"\xff") def readblocks(self, block_num, buf): nblocks = len(buf) // 512 - assert nblocks and not len(buf) % 512, 'Buffer length is invalid' + assert nblocks and not len(buf) % 512, "Buffer length is invalid" if nblocks == 1: # CMD17: set read address for single block if self.cmd(17, block_num * self.cdv, 0, release=False) != 0: # release the card self.cs(1) - raise OSError(5) # EIO + raise OSError(5) # EIO # receive the data and release card self.readinto(buf) else: @@ -242,7 +242,7 @@ class SDCard: if self.cmd(18, block_num * self.cdv, 0, release=False) != 0: # release the card self.cs(1) - raise OSError(5) # EIO + raise OSError(5) # EIO offset = 0 mv = memoryview(buf) while nblocks: @@ -250,23 +250,23 @@ class SDCard: self.readinto(mv[offset : offset + 512]) offset += 512 nblocks -= 1 - if self.cmd(12, 0, 0xff, skip1=True): - raise OSError(5) # EIO + if self.cmd(12, 0, 0xFF, skip1=True): + raise OSError(5) # EIO def writeblocks(self, block_num, buf): nblocks, err = divmod(len(buf), 512) - assert nblocks and not err, 'Buffer length is invalid' + assert nblocks and not err, "Buffer length is invalid" if nblocks == 1: # CMD24: set write address for single block if self.cmd(24, block_num * self.cdv, 0) != 0: - raise OSError(5) # EIO + raise OSError(5) # EIO # send the data self.write(_TOKEN_DATA, buf) else: # CMD25: set write address for first block if self.cmd(25, block_num * self.cdv, 0) != 0: - raise OSError(5) # EIO + raise OSError(5) # EIO # send the data offset = 0 mv = memoryview(buf) @@ -277,5 +277,5 @@ class SDCard: self.write_token(_TOKEN_STOP_TRAN) def ioctl(self, op, arg): - if op == 4: # get number of blocks + if op == 4: # get number of blocks return self.sectors |