tomazas

@echo off

:: configuration
SET CC=sdcc
SET CFLAGS=-mstm8 
SET INCLUDEPATH=C:/st_toolset/STM8S_StdPeriph_Lib/Libraries/STM8S_StdPeriph_Driver/inc
:: mcu type defined in stm8s.h file
SET DEFINES=STM8S103
SET SOURCE=leds
SET OUTPUT_DIR=build

tomazas

# CFG-RATE (0x06,0x08) packet (without header 0xB5,0x62)
# payload length - 6 (little endian format), update rate 200ms, cycles - 1, reference - UTC (0)
packet = [0x06,0x08, 0x06,0x00, 0x00,0xC8, 0x00,0x01, 0x00,0x00]

CK_A,CK_B = 0, 0
for i in range(len(packet)):
  CK_A = CK_A + packet[i]
  CK_B = CK_B + CK_A

# ensure unsigned byte range

tomazas

# Script connects to uBlox 6M GPS receiver through serial interface, 
# reads received NMEA messages, parses and verifies
# them and finally prints parsed information to console (logfile).
#
# NOTE: change below configuration based on your device parameters

# configuration
port = "COM15"
baud = 9600

tomazas

def chksum(inp): # GPS message checksum verification
	if not inp.startswith("$"): return False
	if not inp[-3:].startswith("*"): return False
	payload = inp[1:-3]
	checksum = 0
	for i in xrange(len(payload)):
		checksum =  checksum ^ ord(payload[i])
	return ("%02X" % checksum) == inp[-2:]

# do simple test