D3 = MODE2 = X
D4 = nRESET = 1
D5 = nSLEEP = 1
D6 = nENABLE = 0
D7 = - = X
"""
import time
import logging
from Path import Path
try:
from spi import SPI
# init the SPI for the DAC
spi2_0 = SPI(1, 0)
spi2_0.bpw = 8
spi2_0.mode = 1
# Init the SPI for the serial to parallel
spi2_1 = SPI(1, 1)
spi2_1.bpw = 8
spi2_1.mode = 0
except ImportError:
pass
class Stepper:
all_steppers = list()
revision = "A4"
SLEEP = 6
ENABLED = 4
#!/usr/bin/env python from spi import SPI spi2_1 = SPI(2, 1) spi2_1.bpw = 8 spi2_1.mode = 0 spi2_1.writebytes([0x30])
D3 = MODE2 = X
D4 = nRESET = 1
D5 = nSLEEP = 1
D6 = nENABLE = 0
D7 = - = X
"""
import time
import logging
from Path import Path
try:
from spi import SPI
# init the SPI for the DAC
spi2_0 = SPI(1, 0)
spi2_0.bpw = 8
spi2_0.mode = 1
# Init the SPI for the serial to parallel
spi2_1 = SPI(1, 1)
spi2_1.bpw = 8
spi2_1.mode = 0
except ImportError:
pass
class Stepper:
all_steppers = list()
revision = "A4"
SLEEP = 6
ENABLED = 4
#!/usr/bin/env python from spi import SPI # Set up the SPI dac = SPI(2, 0) dac.mode = 1 # SPI mode 1 dac.bpw = 8 # 8 bits pr word dac.lsbfirst = False # MSB transfers # Calculate the value for the DAC iChop = 2.0 # Current chopping limit (This is the value you can change) vRef = 3.3 # Voltage reference on the DAC rSense = 0.1 # Resistance for the vOut = iChop*5.0*rSense # Calculated voltage out from the DAC (See page 9 in the datasheet for the DAC) dacval = int((vOut*256.0)/vRef) # Update all channels with the value for addr in range(8): byte1 = ((dacval & 0xF0)>>4) + (addr<<4) byte2 = (dacval & 0x0F)<<4 dac.writebytes([byte1, byte2]) # Update all channels dac.writebytes([0xA0, 0xFF]) print "All channels now have vOut = "+str(vOut)+", iChop = "+str(iChop)
