# baudrate used for communication with pkernel
KERNEL_BAUDRATE=38400
+def recvByte():
+ i = tty.read()
+ while len(i)==0:
+ time.sleep(0.01)
+ i = tty.read()
+ return ord(i)
+
+def sendByte(byte):
+ time.sleep(0.501) # just to get sure, wait 1ms
+ tty.write(chr(byte))
+ tty.flush()
+
+def sendWord(word):
+ sendByte(word & 0xFF)
+ sendByte((word >> 8) & 0xFF)
+
+def sendDWord(dword):
+ sendByte(dword & 0xFF)
+ sendByte((dword >> 8) & 0xFF)
+ sendByte((dword >> 16) & 0xFF)
+ sendByte((dword >> 24) & 0xFF)
+
def pkernWRITE(address, size, data):
+ print "address:", hex(address), "size:", size
# send WRITE command
- sendByte(0x01)
- if (recvByte() != 0xF1):
- raise Exception
- sendByte(0x03)
- if (recvByte() != 0x83):
+ sendByte(0x13)
+ if (recvByte() != 0x37):
raise Exception
# tell desired address and size
sendDWord(address)
sendWord(size)
+ if (recvByte() != 0x04):
+ raise Exception
+ print "Received Metadata."
+
# write binary stream of data
for i in range(0, size):
sendByte(data[i])
- # get checksum
- recvChecksum()
+
+ if (recvByte() != 0x08):
+ raise Exception
+ print "Received Data."
+
+ if (recvByte() != 0x18):
+ raise Exception
+ print "Erasing done."
+
+ if (recvByte() != 0x28):
+ raise Exception
+ print "Flashing done."
+
+
+class FlashSequence(object):
+ def __init__(self, address, data):
+ self.address = address
+ self.data = data
+
+# list of all our address/data pairs to flash
+flashseqs = []
+
print "Initializing serial port..."
-tty = SerialPort(DEVICE, 500, KERNEL_BAUDRATE)
+tty = SerialPort(DEVICE, 0, KERNEL_BAUDRATE)
# check command line arguments
if len(sys.argv) != 2:
print "Flashing", len(seq.data), "bytes at address", hex(seq.address)
pkernWRITE(seq.address, len(seq.data), seq.data)
+sendByte(0x99);
+
print "Reset your board now to run code from Flash"