sfpi-test.py

l = ['B7','B6','E20','B5','B3','B2','C3','C0','C1','E22','G0','G2','G4','G5','G3','G1','E21','C2','B0','B1','B4']
n = []
path = '/sys/class/gpio'
for io in l:
    num = ord(io[0])-ord('A')
    num = num*32+int(io[1:])
    n.append(num)
for num in n:
    print('echo %d >%s/export'%(num,path))
    print('echo out >%s/gpio%d/direction'%(path,num))
print('while true;do  ')
for num in n:
    print('echo 1 >%s/gpio%d/value'%(path,num))
    print('#sleep 1')
    print('echo 0 >%s/gpio%d/value'%(path,num))
print('done')