+"""SPI Class for Binho Nova"""
+from adafruit_blinka.microcontroller.nova import Connection
+
+
class SPI:
+ """Custom SPI Class for Binho Nova"""
+
MSB = 0
- PAYLOAD_MAX_LENGTH = 64
+ BUFFER_PAYLOAD_MAX_LENGTH = 64
+ WHR_PAYLOAD_MAX_LENGTH = 1024
def __init__(self, clock):
- from adafruit_blinka.microcontroller.nova import Connection
self._nova = Connection.getInstance()
- self._nova.setOperationMode(0, 'SPI')
+ self._nova.setNumericalBase(10)
+ self._nova.setOperationMode(0, "SPI")
self._nova.setClockSPI(0, clock)
self._nova.setModeSPI(0, 0)
- self._nova.setIOpinMode(0, 'DOUT')
- self._nova.setIOpinMode(1, 'DOUT')
+ self._nova.setIOpinMode(0, "DOUT")
+ self._nova.setIOpinMode(1, "DOUT")
self._nova.beginSPI(0)
+ self._novaCMDVer = "0"
+ if hasattr(self._nova, "getCommandVer"):
+ response = self._nova.getCommandVer().split(" ")
+ if response[0] != "-NG":
+ self._novaCMDVer = response[1]
# Cpol and Cpha set by mode
# Mode Cpol Cpha
# 2 1 0
# 3 1 1
- def init(self, baudrate=100000, polarity=0, phase=0, bits=8,
- firstbit=MSB, sck=None, mosi=None, miso=None):
- #print("baudrate: " + str(baudrate))
- #print("mode: " + str((polarity<<1) | (phase)))
+ def __del__(self):
+ """Close Nova on delete"""
+ self._nova.close()
+
+ # pylint: disable=too-many-arguments,unused-argument
+ def init(
+ self,
+ baudrate=1000000,
+ polarity=0,
+ phase=0,
+ bits=8,
+ firstbit=MSB,
+ sck=None,
+ mosi=None,
+ miso=None,
+ ):
+ """Initialize the Port"""
self._nova.setClockSPI(0, baudrate)
- self._nova.setModeSPI(0, (polarity<<1) | (phase))
+ self._nova.setModeSPI(0, (polarity << 1) | (phase))
+
+ # pylint: enable=too-many-arguments,unused-argument
@staticmethod
- def getSpiReceivedData(lineOutput):
- return (lineOutput.split('RXD ')[1])
+ def get_received_data(lineOutput):
+ """Return any received data"""
+ return lineOutput.split("RXD ")[1]
@property
def frequency(self):
- return self._nova.getClockSPI(0).split('CLK ')[1]
+ """Return the current frequency"""
+ return self._nova.getClockSPI(0).split("CLK ")[1]
def write(self, buf, start=0, end=None):
+ """Write data from the buffer to SPI"""
end = end if end else len(buf)
- chunks, rest = divmod(end - start, self.PAYLOAD_MAX_LENGTH)
+ payloadMaxLength = self.BUFFER_PAYLOAD_MAX_LENGTH
+ if int(self._novaCMDVer) >= 1:
+ payloadMaxLength = self.WHR_PAYLOAD_MAX_LENGTH
+ chunks, rest = divmod(end - start, payloadMaxLength)
+
for i in range(chunks):
- chunk_start = start + i * self.PAYLOAD_MAX_LENGTH
- chunk_end = chunk_start + self.PAYLOAD_MAX_LENGTH
- buffer_data = buf[chunk_start:chunk_end]
- self._nova.clearBuffer(0)
- self._nova.writeToBuffer(0, 0, buffer_data)
- self._nova.transferBufferSPI(0, chunk_end - chunk_start + 1)
+ chunk_start = start + i * payloadMaxLength
+ chunk_end = chunk_start + payloadMaxLength
+ if int(self._novaCMDVer) >= 1:
+ self._nova.writeToReadFromSPI(0,
+ True,
+ False,
+ chunk_end - chunk_start,
+ buf[chunk_start:chunk_end])
+ else:
+ self._nova.clearBuffer(0)
+ self._nova.writeToBuffer(0, 0, buf[chunk_start:chunk_end])
+ self._nova.transferBufferSPI(0, chunk_end - chunk_start + 1)
if rest:
- buffer_data = buf[-1*rest:]
- self._nova.clearBuffer(0)
- self._nova.writeToBuffer(0, 0, buffer_data)
- self._nova.transferBufferSPI(0, rest)
+ if int(self._novaCMDVer) >= 1:
+ self._nova.writeToReadFromSPI(0, True, False, rest, buf[-1 * rest :])
+ else:
+ self._nova.clearBuffer(0)
+ self._nova.writeToBuffer(0, 0, buf[-1 * rest :])
+ self._nova.transferBufferSPI(0, rest)
def readinto(self, buf, start=0, end=None, write_value=0):
+ """Read data from SPI and into the buffer"""
end = end if end else len(buf)
- for i in range(start, end):
- buf[start+i] = int(self.getSpiReceivedData(self._nova.transferSPI(0, write_value)), 16)
+ if int(self._novaCMDVer) >= 1:
+ chunks, rest = divmod(end - start, self.WHR_PAYLOAD_MAX_LENGTH)
+ i = 0
+ for i in range(chunks):
+ chunk_start = start + i * self.WHR_PAYLOAD_MAX_LENGTH
+ chunk_end = chunk_start + self.WHR_PAYLOAD_MAX_LENGTH
+ result = self._nova.writeToReadFromSPI(0,
+ False,
+ True,
+ chunk_end - chunk_start,
+ write_value)
+ if result != "-NG":
+ resp = result.split(" ")
+ resp = resp[2]
+ # loop over half of resp len as we're reading 2 chars at a time to form a byte
+ loops = int(len(resp)/2)
+ for j in range(loops):
+ buf[(i*self.WHR_PAYLOAD_MAX_LENGTH)+start+j] = \
+ int(resp[j*2]+resp[j*2+1], 16)
+ else:
+ raise RuntimeError("Received error response from Binho Nova, result = " + \
+ result)
+ if rest:
+ result = self._nova.writeToReadFromSPI(0, False, True, rest, write_value)
+ if result != "-NG":
+ resp = result.split(" ")
+ resp = resp[2]
- def write_readinto(self, buffer_out, buffer_in, out_start=0, out_end=None, in_start=0, in_end=None):
+ # loop over half of resp len as we're reading 2 chars at a time to form a byte
+ loops = int(len(resp)/2)
+ for j in range(loops):
+ buf[(i*self.WHR_PAYLOAD_MAX_LENGTH)+start+j] = \
+ int(resp[j*2]+resp[j*2+1], 16)
+ else:
+ raise RuntimeError("Received error response from Binho Nova, result = " + \
+ result)
+ else:
+ for i in range(start, end):
+ buf[start+i] = int(self.get_received_data(self._nova.transferSPI(0, write_value)))
+
+ # pylint: disable=too-many-arguments
+ def write_readinto(
+ self, buffer_out, buffer_in, out_start=0, out_end=None, in_start=0, in_end=None
+ ):
+ """Perform a half-duplex write from buffer_out and then
+ read data into buffer_in
+ """
out_end = out_end if out_end else len(buffer_out)
in_end = in_end if in_end else len(buffer_in)
- readlen = in_end-in_start
- writelen = out_end-out_start
+ readlen = in_end - in_start
+ writelen = out_end - out_start
if readlen > writelen:
# resize out and pad with 0's
tmp = bytearray(buffer_out)
tmp.extend([0] * (readlen - len(buffer_out)))
buffer_out = tmp
- i = 0
- for data_out in buffer_out:
- data_in = int(self.getSpiReceivedData(self._nova.transferSPI(0, data_out)), 16)
- if i < readlen:
- buffer_in[in_start+i] = data_in
- i += 1
+
+ if int(self._novaCMDVer) >= 1:
+ chunks, rest = divmod(len(buffer_out), self.WHR_PAYLOAD_MAX_LENGTH)
+ i = 0
+ for i in range(chunks):
+ chunk_start = out_start + i * self.WHR_PAYLOAD_MAX_LENGTH
+ chunk_end = chunk_start + self.WHR_PAYLOAD_MAX_LENGTH
+ result = self._nova.writeToReadFromSPI(0,
+ True,
+ True,
+ chunk_end-chunk_start,
+ buffer_out[chunk_start:chunk_end])
+
+ if result != "-NG":
+ resp = result.split(" ")
+ resp = resp[2]
+
+ # loop over half of resp len as we're reading 2 chars at a time to form a byte
+ loops = int(len(resp)/2)
+ for j in range(loops):
+ buffer_in[(i*self.WHR_PAYLOAD_MAX_LENGTH)+in_start+j] = \
+ int(resp[j*2]+resp[j*2+1], 16)
+ else:
+ raise RuntimeError("Received error response from Binho Nova, result = " + \
+ result)
+ if rest:
+ result = self._nova.writeToReadFromSPI(0, True, True, rest, buffer_out[-1*rest:])
+ if result != "-NG":
+ resp = result.split(" ")
+ resp = resp[2]
+
+ # loop over half of resp len as we're reading 2 chars at a time to form a byte
+ loops = int(len(resp)/2)
+ for j in range(loops):
+ buffer_in[(i*self.WHR_PAYLOAD_MAX_LENGTH)+in_start+j] = \
+ int(resp[j*2]+resp[j*2+1], 16)
+ else:
+ raise RuntimeError("Received error response from Binho Nova, result = " + \
+ result)
+ print(buffer_in)
+ else:
+ for data_out in buffer_out:
+ data_in = int(self.get_received_data(self._nova.transferSPI(0, data_out)))
+ if i < readlen:
+ buffer_in[in_start+i] = data_in
+ i += 1
+ # pylint: enable=too-many-arguments
projects / Adafruit_Blinka-hackapet.git / blobdiff