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spi.py
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#!/usr/bin/python3
import time
from hexdump import hexdump
import array
import struct
import sys
import usb1
import usb.core
import usb.util
import binascii
'''
# DspiEnableEx: 3 6 0 <1: port request>
# DspiDisable: 3 6 1 <1: port request>
# DspiSetSpeed: 7 6 3 <1: active port> <4: speed>
# DspiGetSpeed: 3 6 4 <1: active port>
# DspiSetSpiMode: 4 6 5 <1: active port> <1: mode?>
# DspiSetSelect: 4 6 6 <1: active port> <1: select state>
# DspiPut: 10 6 7 <1: active port> <1: fSelStart> <1: fSelEnd>
# <1: should receive?> <4: number of bytes>
# (fSelStart, fSelEnd, rgbSnd, rgbRcv, cbSend, fOverlap)
'''
#TODO: read flag status register bits, handle flash to write .bit
## must be done in another time, for now finish TB assignments
#spi
ENABLE=0
DISABLE=1
GETSPEED=4
SETSPEED=3
#flash
STAT_BUSY = 0x1
STAT_WEL = 0x2
CMD_GET_STATUS = 0x05
CMD_WRITE_ENABLE = 0x6
CMD_READ_ID = 0x9F
CMD_WAKEUP = 0xAB
CMD_CHIP_ERASE = 0xC7
CMD_PAGE_PROGRAM = 0x02
CMD_FAST_READ = 0xB
CMD_RFSR=0x70
class SPI(object):
STAT_BUSY=1
def __init__(self, port):
self.port=port
self.dev = usb.core.find(idVendor=0x1443, idProduct=0x0007)
self.dev.reset()
#self.dev.set_configuration(0)
self.dev.set_configuration(1)
self.ENABLED=0
cfg = self.dev.get_active_configuration()
intf = usb.util.find_descriptor(cfg)
self.ep_cmdout = usb.util.find_descriptor(intf, bEndpointAddress = 1)
self.ep_cmdin = usb.util.find_descriptor(intf, bEndpointAddress = 0x82)
self.ep_dataout = usb.util.find_descriptor(intf, bEndpointAddress = 3)
self.ep_datain = usb.util.find_descriptor(intf, bEndpointAddress = 0x84)
self.enable()
def __return_bytes(self, num=16):
return bytes(self.ep_cmdin.read(num))
def __return_bytes_mem(self, num=16):
return bytes(self.ep_datain.read(num))
def enable(self):
self.ep_cmdout.write(struct.pack('BBBB', 3, 6, 0, self.port))
self.ENABLED=1
return self.__return_bytes()[1:]
def setSpeed(self, speed):
self.ep_cmdout.write(struct.pack('BBBBI', 7,6,3,0, speed))
return self.__return_bytes()
def getSpeed(self):
self.ep_cmdout.write(struct.pack('BBBB', 3, 6, 4, self.port))
return int.from_bytes(self.__return_bytes()[2:], "little")
def setMode(self, mode,sh=False):
self.ep_cmdout.write(struct.pack('BBBBBB', 4,6,5,self.port,mode,sh))
return self.__return_bytes()
def io(self, write_bytes, read_byte_count=0):
write_bytes=list(write_bytes)
if len(write_bytes) < read_byte_count:
write_bytes.extend([0]*(read_byte_count-len(write_bytes)))
write_b_count=len(write_bytes)
read_bytes=[]
# Do the IO
while write_bytes or len(read_bytes) < read_byte_count:
if write_bytes:
self.ep_dataout.write(write_bytes[:64])
write_bytes = write_bytes[64:]
assert self.ENABLED == 1
if read_byte_count:
to_read = min(64, read_byte_count)
read_bytes.extend(self.ep_datain.read(to_read))
return read_bytes
def put(self, b, fSelStart=0, fSelEnd=1):
assert self.ENABLED == 1
rcv = 1
self.ep_cmdout.write(struct.pack("BBBBBBBI", 10, 6, 7, 0, fSelStart, fSelEnd, rcv, len(b)))
self.ep_dataout.write(b)
#hexdump(self.ep_cmdin.read(0x10))
def get(self, nbytes, fSelStart=0, fSelEnd=1, bfill=1, mem=False):
rcv=1 # is a pointer
self.ep_cmdout.write(struct.pack("BBBBBBBI", 10,6,8,0,fSelStart, fSelEnd, rcv, nbytes))
if mem:
return self.__return_bytes_mem(nbytes)
return self.__return_bytes(nbytes)
def bulk_erase(self):
self.put(b'\x06'+b'\x00')
#self.waitDone()
def pageProgram(self,data):
self.put(bytes(CMD_PAGE_PROGRAM))
for adr in range(0, len(data), 256): # send 256 bytes at a time
send=data[adr:adr+256]
self.ep_dataout.write(send)
#self.io([0x02, (addr>>16) & 0xFF, (addr>>8)&0xff, addr&0xff] + list(buf))
def write_enable(self):
self.put(bytes(CMD_WRITE_ENABLE))
def read(self, addr, fSelStart=0, fSelEnd=1):
#send 3byte address, big-endian; an index struct.pack() would work too
inp=bytearray([CMD_FAST_READ, (addr>>16)&0xff, (addr>>8)& 0xFF, addr&0xff])
self.put(inp)
#hexdump(self.ep_datain.read(100))
def read_id(self): # should return 20
self.put(b'\x9f' + b'\x00' * 10)
return self.__return_bytes_mem(0x14)
def getStatus(self):
self.put(bytes(CMD_GET_STATUS)+b'\x00'*10)
return self.__return_bytes(2)
def waitDone(self):
while self.getStatus() & self.STAT_BUSY:
pass
def get_board(self):
r=bytes(self.dev.ctrl_transfer(0xc4, 0xe2,0x00,0x00,16))#read 16 bytes over endpoint0
return r[:r.index(b'\x00')].decode('utf-8')
if __name__=="__main__":
s=SPI(0)
hexdump(s.read_id())
s.write_enable()
s.setMode(0)
print(s.getSpeed())
#buf=open('blink.bit', 'rb').read()
#s.pageProgram(buf)
hexdump(s.getStatus())
'''
s.enable()
s.setMode(0)
s.bulk_erase()
s.read(0xffffff)
# 06 WREN p88 BULK ERASE c7 p79
'''