Created
February 7, 2011 10:02
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import serial | |
import time | |
import subprocess | |
def scale(toscale, fromr=[-1,1],tor=[0,100],invert=0):#scale any number in one range to another | |
#linier only right now. uses y=mx+b | |
x1=fromr[0] | |
x2=fromr[1] | |
y1=tor[0] | |
y2=tor[1] | |
m=((y2-y1)/(x2-x1)) | |
b=((-m)*x1+y1) | |
ret=(m*toscale+b) | |
if invert ==1: | |
#((self.ax * -1) + 100) | |
ret=((ret*-1)+tor[1]) | |
return ret | |
CMD=['mpstat', '1', '1'] | |
def getcpu(): | |
cpu=subprocess.Popen(CMD,stdout=subprocess.PIPE).stdout.read().split('\n')[-2].split()[2] | |
return float(cpu) | |
def main(): | |
ard=serial.Serial('/dev/ttyUSB0') | |
ard.write('g')#g for go! | |
ard.flushInput()#got to clear the stream that started at the arduino | |
while True: | |
time.sleep(0.25)#got to give servo chance to move | |
f=getcpu() | |
full=scale(f,[0.0,100.0],[0,255],1) | |
print full,f | |
ard.write(chr(int(full))) | |
if __name__=='__main__': | |
main() |
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simple program to read and set my cpu dail