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Connecting a CompactFlash card

• CompactFlash

  
  CF cards will give you some MB of storage disk and also newer ones give you ethernet IO, wireless, etc. This is a first try, with this kind of cards, using a monitor program and a serial link. Get this howto article and download the sourcecode

  
  
  
  
  

  Assign PIC pins in cfp.jal:

     -- The following pins will be "high" (+5V)
     -- 
     -- cf-13      vcc
     -- cf-32      -ce2
     -- cf-38      vcc
     -- cf-41      reset
     
     -- The following pins will be "low" (gnd)
     -- 
     -- cf-01      gnd
     -- cf-07      -cel
     -- cf-39      -csel
     -- cf-50      gnd
     
     -- CF address bus, low 8 bits
     port_b_direction  = all_output 
     var byte cfaddr_lo is portb
  
     -- CF address bus, high 3 bits
     port_e_direction  = all_output 
     var byte cfaddr_hi is porte
  
     -- CF 8 bit data bus
     port_d_direction  = all_input
     var byte cf_data_direction is port_d_direction, cf_data is portd
  
     -- CF OE signal. Active Low
     var bit cf_oe is pin_a1
     cf_oe = high
     pin_a1_direction = output
     
     -- CF IORD signal. Active Low
     var bit cf_iord is pin_c0
     cf_iord = high
     pin_c0_direction = output
     
     -- CF IOWR signal. Active Low
     var bit cf_iowr is pin_c1
     cf_iowr = high
     pin_c1_direction = output
     
     -- CF WE signal. Active Low
     var bit cf_we is pin_a2
     cf_we = high
     pin_a2_direction = output
     
     -- CF REG signal. Active Low
     var bit cf_reg is pin_a3
     cf_reg = high
     pin_a3_direction = output
     
     -- CF IREQ/Ready signal. Active Low
     var bit cf_ready is pin_a5
     pin_a5_direction = input
     
     -- CF Wait signal. Active Low
     var bit cf_wait is pin_a4
     pin_a4_direction = input
  

  
  
  

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