from pyb import SPI spi = SPI(1) print(spi) spi = SPI(1, SPI.MASTER) spi = SPI(1, SPI.MASTER, baudrate=500000) spi = SPI(1, SPI.MASTER, 500000, polarity=1, phase=0, bits=8, firstbit=SPI.MSB, ti=False, crc=None) print(spi) spi.init(SPI.SLAVE, phase=1) print(spi) spi.init(SPI.MASTER) spi.send(1, timeout=100) print(spi.recv(1, timeout=100)) print(spi.send_recv(1, timeout=100))
print(spi)
spi = SPI(1, SPI.CONTROLLER)
spi = SPI(1, SPI.CONTROLLER, baudrate=500000)
spi = SPI(1,
SPI.CONTROLLER,
500000,
polarity=1,
phase=0,
bits=8,
firstbit=SPI.MSB,
ti=False,
crc=None)
print(str(spi)[:32], str(spi)[53:]) # don't print baudrate/prescaler
spi.init(SPI.PERIPHERAL, phase=1)
print(spi)
try:
# need to flush input before we get an error (error is what we want to test)
for i in range(10):
spi.recv(1, timeout=100)
except OSError:
print("OSError")
spi.init(SPI.CONTROLLER)
spi.send(1, timeout=100)
print(spi.recv(1, timeout=100))
print(spi.send_recv(1, timeout=100))
spi.deinit()
nb = ''
if bursts > 1 and t_p_burst > 500: # Set to discrimanate between nnormal and "slow" transfers
nb = 'SLOW !'
print("%6s %7.3f Mbaud Tot_time:%7.3f s %6.1f us between calls" % (nb, baud / 1e6, time / 1e6, t_p_burst))
baud_rates = [328125, 656250, 1312500, 2625000, 5250000, 10500000, 21000000]
spi = SPI(2, SPI.MASTER, baud_rates[0])
'''Since MISO is not connected, disable SPI for MISO by setting Pin as normal Pin input'''
miso_dummy = Pin('Y7', Pin.IN) # May help prevent OS error 5 ?
""" Test SPI with data similar to graphical TFT traffic; Slow for some baudrates (10.5 Mbits/s) """
print("\nGraphical type data (2048 bursts of 4 bytes):")
for baud in baud_rates:
spi.init(SPI.MASTER, baud) # Change baud rate
start = micros()
for a in range(128):
for x in range(16):
spi.send(bytearray([0, x, 0, a]))
print_elapsed_time(baud, start, 2048, 4)
""" Test SPI with generic data in ONE long buffer; Always(?) fast! """
print("\nGeneric data (8192 bytes pre-prepared as ONE long buffer):")
for baud in baud_rates:
spi.init(SPI.MASTER, baud) # Change baud rate
data = bytearray([0, rng() & 0xFF, 0, rng() & 0xFF] * 2048)
start = micros()
spi.send(data)
print_elapsed_time(baud, start, 1, 8192)
from pyb import SPI spi = SPI(1) print(spi) spi = SPI(1, SPI.MASTER) spi = SPI(1, SPI.MASTER, baudrate=500000) spi = SPI(1, SPI.MASTER, 500000, polarity=1, phase=1, bits=8, firstbit=SPI.MSB, ti=False, crc=None) print(spi) spi.init(SPI.SLAVE) print(spi) spi.init(SPI.MASTER) spi.send(1, timeout=100) print(spi.recv(1, timeout=100)) print(spi.send_recv(1, timeout=100))
polarity=0,
phase=0,
firstbit=SPI.MSB,
pins=spi_pins)
print(spi)
spi = SPI(baudrate=5000000)
print(spi)
spi = SPI(0, SPI.MASTER, baudrate=200000, bits=16, polarity=0, phase=0)
print(spi)
spi = SPI(0, SPI.MASTER, baudrate=10000000, polarity=0, phase=1)
print(spi)
spi = SPI(0, SPI.MASTER, baudrate=5000000, bits=32, polarity=1, phase=0)
print(spi)
spi = SPI(0, SPI.MASTER, baudrate=10000000, polarity=1, phase=1)
print(spi)
spi.init(baudrate=20000000, polarity=0, phase=0)
print(spi)
spi = SPI()
print(spi)
SPI(mode=SPI.MASTER)
SPI(mode=SPI.MASTER, pins=spi_pins)
SPI(id=0, mode=SPI.MASTER, polarity=0, phase=0, pins=('GP14', 'GP16', 'GP15'))
SPI(0, SPI.MASTER, polarity=0, phase=0, pins=('GP31', 'GP16', 'GP15'))
spi = SPI(0, SPI.MASTER, baudrate=10000000, polarity=0, phase=0, pins=spi_pins)
print(spi.write('123456') == 6)
buffer_r = bytearray(10)
print(spi.readinto(buffer_r) == 10)
print(spi.readinto(buffer_r, write=0x55) == 10)
read = spi.read(10)
print(len(read) == 10)
else:
raise Exception('Board not supported!')
spi = SPI(0, SPI.MASTER, baudrate=2000000, polarity=0, phase=0, firstbit=SPI.MSB, pins=spi_pins)
print(spi)
spi = SPI(baudrate=5000000)
print(spi)
spi = SPI(0, SPI.MASTER, baudrate=200000, bits=16, polarity=0, phase=0)
print(spi)
spi = SPI(0, SPI.MASTER, baudrate=10000000, polarity=0, phase=1)
print(spi)
spi = SPI(0, SPI.MASTER, baudrate=5000000, bits=32, polarity=1, phase=0)
print(spi)
spi = SPI(0, SPI.MASTER, baudrate=10000000, polarity=1, phase=1)
print(spi)
spi.init(baudrate=20000000, polarity=0, phase=0)
print(spi)
spi=SPI()
print(spi)
SPI(mode=SPI.MASTER)
SPI(mode=SPI.MASTER, pins=spi_pins)
SPI(id=0, mode=SPI.MASTER, polarity=0, phase=0, pins=('GP14', 'GP16', 'GP15'))
SPI(0, SPI.MASTER, polarity=0, phase=0, pins=('GP31', 'GP16', 'GP15'))
spi = SPI(0, SPI.MASTER, baudrate=10000000, polarity=0, phase=0, pins=spi_pins)
print(spi.write('123456') == 6)
buffer_r = bytearray(10)
print(spi.readinto(buffer_r) == 10)
print(spi.readinto(buffer_r, write=0x55) == 10)
read = spi.read(10)
print(len(read) == 10)
# SAMPLING
NSAMPLES = const(400)
def arr_gen(n):
for _ in range(n):
yield 0
isamples = array('h', arr_gen(NSAMPLES))
vsamples = array('h', arr_gen(NSAMPLES))
gc.collect()
# HARDWARE
vadc = ADC(Pin.board.X19)
iadc = ADC(Pin.board.X20)
spi = SPI(1)
spi.init(SPI.MASTER, polarity = 0, phase = 0)
# ************* Programmable Gain Amplifier *************
class MCP6S91():
CHANNEL_ADDR = 0x41
GAIN_ADDR = 0x40
GAINVALS = (1, 2, 4, 5, 8, 10, 16, 32)
PINS = ('X5', 'X4')
def __init__(self, devno):
try:
self.csn = Pin(MCP6S91.PINS[devno], mode = Pin.OUT_PP)
except IndexError:
raise ValueError('MCP6S91 device no. must be 0 or 1.')
self.csn.value(1)
self.csn.value(0)
from pyb import SPI
spi = SPI(1)
print(spi)
spi = SPI(1, SPI.MASTER)
spi = SPI(1, SPI.MASTER, baudrate=500000)
spi = SPI(1,
SPI.MASTER,
500000,
polarity=1,
phase=1,
bits=8,
firstbit=SPI.MSB,
ti=False,
crc=None)
print(spi)
spi.init(SPI.SLAVE)
print(spi)
spi.init(SPI.MASTER)
spi.send(1, timeout=100)
print(spi.recv(1, timeout=100))
print(spi.send_recv(1, timeout=100))
