def ReadChar(fd):
# read a single character back from the serial line
qtydata = wiringpi.serialDataAvail(fd)
logging.info("Amount of data: %s bytes" % qtydata)
response = 0
if qtydata > 0:
logging.debug("Reading data back %d" % qtydata)
response = wiringpi.serialGetchar(fd)
return response
def ReadInt(fd):
# read a single character back from the serial line
qtydata = wiringpi2.serialDataAvail(fd)
# print ("Amount of data: %s bytes" % qtydata) # Added for debug purposes
response = 0
if qtydata > 0:
# print ("Reading data back %d" % qtydata) #Added for Debug purposes
response = wiringpi2.serialGetchar(fd)
return response
def ReadText(fd):
# read the data back from the serial line and return it as a string to the calling function
qtydata = wiringpi2.serialDataAvail(fd)
# print ("Amount of data: %d bytes" % qtydata) # Added for debug purposes
response = ""
while qtydata > 0:
# while there is data to be read, read it back
# print ("Reading data back %d" % qtydata) #Added for Debug purposes
response = response + chr(wiringpi2.serialGetchar(fd))
qtydata = qtydata - 1
return response
def read(self, buffer_len):
""" read buffer_len size bytes from opened port.
If there is no data available then the calling thread will be hang-up until data is available.
If no data longer than 10 seconds, throw "read timeout exception".
"""
buffer = BytesIO()
while len(buffer.getvalue()) < buffer_len:
char = wiringpi.serialGetchar(self.serial_fd)
if char == -1:
raise "read timeout!"
buffer.write(char.to_bytes(1, byteorder='big'))
return buffer.getvalue()
def read_serial():
while running:
try:
if wpi.serialDataAvail(fd) != -1 :
ch = wpi.serialGetchar(fd)
if ch== -1 :
continue
ch = chr(ch)
if ch == '\r':
ch = '\n'
print(ch, end='')
except:
pass
print("bye.")
def ReadData(fd):
# read the data back from the serial line and return it as a string to the calling function
qtydata = wiringpi.serialDataAvail(fd)
logging.info("Amount of data: %d bytes" % qtydata)
response = []
while qtydata > 0:
# while there is data to be read, read it back
logging.debug("Reading data back byte:%d" % qtydata)
# This used to have hex to convert the data to a hex string
response.append(wiringpi.serialGetchar(fd))
qtydata = qtydata - 1
logging.info("Data Packet received: %s" % response)
logging.debug("Size of data packet received %d" % len(response))
return response
def read_char(fd):
# Reads chars from the serial device until the parity is correct.
# Returns the first valid char received.
while True:
# read next byte
b = serialGetchar(fd)
if b >= 0:
# check even parity
p = True
m = 0x80
while m:
if (m & b):
p = not p
m = m >> 1
if p:
return chr(b & 0x7f)
def _serial(send=None):
wiringpi.wiringPiSetup()
serial = wiringpi.serialOpen('/dev/ttyAMA0', 9600)
if send != None:
wiringpi.serialPuts(serial, send)
wiringpi.serialPutchar(serial, 3)
wiringpi.serialClose(serial)
else:
char = ""
asciinum = -1
while (True):
asciinum = wiringpi.serialGetchar(serial)
if asciinum != -1 and asciinum != 3:
char += chr(asciinum)
elif asciinum == 3:
break
wiringpi.serialClose(serial)
return char
def read_ATR(serial):
wiringpi.pinMode(TX, INPUT)
wiringpi.pullUpDnControl(TX, PUD_UP)
first = wiringpi.millis()
data_str = ''
while (wiringpi.millis() - first) < 100:
if wiringpi.serialDataAvail(serial) > 0:
first = wiringpi.millis()
data = wiringpi.serialGetchar(serial)
if (data < 16):
data *= 16
data_str += ('{:02x}'.format(data)) + ' '
wiringpi.pullUpDnControl(TX, PUD_OFF)
wiringpi.pinModeAlt(TX, 4)
data_str = data_str.lstrip('00')
return data_str
def read_response(serial, ser, length):
wiringpi.pinMode(TX, INPUT)
wiringpi.pullUpDnControl(TX, PUD_UP)
first = wiringpi.millis()
wiringpi.delay(50)
## Save all the data from RX excluding bounced data
data_list = []
num_ser = wiringpi.serialDataAvail(serial)
while (wiringpi.millis() - first) < 100:
if wiringpi.serialDataAvail(serial) > 0:
first = wiringpi.millis()
data = wiringpi.serialGetchar(serial)
if (wiringpi.serialDataAvail(serial) < (num_ser - length)):
data_list.append('{:02x}'.format(data))
wiringpi.pullUpDnControl(TX, PUD_OFF)
wiringpi.pinModeAlt(TX, 4)
return data_list
#!/usr/bin/env python
import wiringpi as wpi
import time
serial = wpi.serialOpen('/dev/ttyS0', 115200)
while True:
input_str = raw_input('Serial Input> ')
wpi.serialPuts(serial, input_str)
time.sleep(0.1)
output_str = 'Serial Output> '
while wpi.serialDataAvail(serial):
output_str += chr(wpi.serialGetchar(serial))
print output_str
wpi.serialClose(serial)
def read(self):
while wiringpi.serialDataAvail(self.serial) > 0:
value = (wiringpi.serialGetchar(self.serial))
if value > 0:
print("{}".format(chr(value)), end='', flush=True)
serial_tty = "/dev/ttyS0"
serial_speed = 9600
serial = pi.serialOpen(serial_tty, serial_speed)
def dm_to_deg(data):
deg = int(float(data) / 100)
min = float(data) - deg * 100
return (round(deg + min / 60.0, 6))
while (True):
gps_line = ''
while (True):
buf = chr(pi.serialGetchar(serial))
if (buf == '\r'):
break
elif (buf != '\n'):
gps_line = gps_line + buf
gps_data = gps_line.split(",")
if (gps_data[0] == '$GPRMC'):
lat = gps_data[3]
long = gps_data[5]
if (lat != "" and long != ""):
lat_deg = dm_to_deg(lat)
long_deg = dm_to_deg(long)
print("Latitude:", lat_deg, " Longitude:", long_deg)
else:
print("Cannot catch satellite.")
