SPIbitbang1.py

from I2Cdevices import *;
import numpy as np

class SPIbitbang1(I2Cdevices):
    def I2CSet(self,dev,reg,value,I2Ccallback,width=8,bitoffset=0):
          SPI=Find(self.D['I2C_devices'],'dev_name',dev)
          Reg=Find(SPI['dev_registers'],'reg_name',reg)  
          ADC_address=Reg['reg_addr']
          SetBit=I2Ccallback

          ADC_bytes = 0x00
          ADC_rw    = 0x00 # 0 for write, 1 for read
          data2 = ( ADC_rw << 23 ) + ( ADC_bytes << 21 ) + ( ADC_address << 8 ) + value[0]
          
          bit_array = "{0:{fill}24b}".format(data2, fill='0')
      #    print(bit_array)
          SetBit('CS',0) #enable
          for bit in bit_array:
              SetBit('SDO',int(bit)) 
              SetBit('CLK',1) 
              SetBit('CLK',0) 
          SetBit('CS',1) 
          return True;
          

    def I2CGet(self,dev,reg,value,I2Ccallback,width=8,bitoffset=0):
          
          SPI=Find(self.D['I2C_devices'],'dev_name',dev)
          Reg=Find(SPI['dev_registers'],'reg_name',reg)  
          ADC_reg_address=Reg['reg_addr']
#          print(ADC_reg_address,CS,SDIOdir,SDI,SDO,CLK)
          SetBit=I2Ccallback

          ADC_bytes = 0x00
          ADC_rw    = 0x01 # 0 for write, 1 for read
        
          data = ( ADC_rw << 15) + ( ADC_bytes << 13 ) + ADC_reg_address
          
          SetBit('CS',0) #enable

          bit_array = "{0:{fill}16b}".format(data, fill='0')
          for bit in bit_array:
              SetBit('SDO',int(bit))
              SetBit('CLK',1)
              SetBit('CLK',0)

          SetBit('CS',1) #disable

          #    print("read byte")
          SetBit('SDIOdir',1) #inpute
          SetBit('CS',0) #enable
          a=[0]
          read_bit = ''
          for cnt in range(8*(ADC_bytes+1)):
              ret_value=SetBit('SDI',0,True)
              read_bit += str(ret_value)
              SetBit('CLK',1)
              SetBit('CLK',0) #read after falling edge
          SetBit('CS',1) #disable
          SetBit('SDIOdir',0) #output
#          SetBit(SDO,1) 
#          SetBit(CLK,1) 
#          print(read_bit)
#          stri = "Read back data is: {0:2x} ".format(int(read_bit, 2))
#          print(stri)
          value[0]=int(read_bit, 2)
          return True;