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Using Eur's boards

• EUR

  
  You can find a detailed description of this board at Eur's JalEthernet site. Compatible with 40 & 28 pin PICs. Connectors: ICSP, RS-232, RJ45, Power, Port_A&E, Port_C. Jumpers to enable/disable: LED output, RS-232, power supply, and Power Over Ethernet. A powerful board! Check prices in Eur's website!

  
  
  
  
  

  Special files in sources/smalltcp:

  • netconf_Eur_28.jal

  • net_Eur_40.jal

  • net_Eur_28.jal

  • netp_Eur_40.jal

  • netp_Eur_28.jal

  
  
  

  Assign PIC pins in netp.jal, 40 pins PIC:

  -- This is the standard JAL "blink the LED" pin. 
  -- Not required, but very handy.
  var bit DEBUG_LED is pin_a0
  pin_a0_direction = output
  
  -- ISA address bus, low 5 bits
  port_d_direction  = all_output 
  var byte isa_addr is port_d
  
  -- ISA 8 bit data bus
  port_b_direction  = all_output 
  var byte isa_data is port_b = 0
  var byte isa_data_direction is port_b_direction
  
  
  -- ISA read and write strobes. Both are active low signals
  var bit isa_ior is pin_d5 = high 
  pin_d5_direction = output
  
  var bit isa_iow is pin_d6 = high 
  pin_d6_direction = output
  
  -- ISA reset signal. Active high.
  var bit isa_reset is pin_d7 = low
  pin_d7_direction = output
  

  
  
  

  Assign PIC pins in netp.jal, 28 pins PIC:

  -- This is the standard JAL "blink the LED" pin. 
  -- Not required, but very handy.
  var bit DEBUG_LED is pin_a0
  pin_a0_direction = output
  
  -- ISA address bus, low 5 bits
  port_c_direction  = all_output 
  var byte isa_addr is port_c
  
  -- ISA 8 bit data bus
  port_b_direction  = all_output 
  var byte isa_data is port_b = 0
  var byte isa_data_direction is port_b_direction
  
  
  -- ISA read and write strobes. Both are active low signals
  var bit isa_ior is pin_c5 = high 
  pin_c5_direction = output
  
  var bit isa_iow is pin_c6 = high 
  pin_c6_direction = output
  
  -- ISA reset signal. Active high.
  var bit isa_reset is pin_c7 = low
  pin_c7_direction = output
  

  
  
  

  net.jal modifications to work with Eur's board:

  procedure net_write ( byte in addr, byte in v ) is
  -- only 5 lower bytes active -- reset = low, /IOW & /IOR = high
    isa_addr = ( addr & 0x1F ) + 0x60       
    isa_data = v
    isa_data_direction = all_output
    isa_iow = low
    isa_iow = high
    isa_data_direction = all_input
  end procedure
  
  function net_read ( byte in addr ) return byte is
    var byte v
    isa_data_direction = all_input
    -- only 5 lower bytes active -- reset = low, /IOW & /IOR = high
    isa_addr = ( addr & 0x1F ) + 0x60      
    isa_ior = low
    v = isa_data
    isa_ior = high
    return v
  end function
  
  procedure net_reset_chip is
    var byte v
  
    -- WDT management
    wdt_state = 0x25
    
    -- set i/o control signals to a known state
    isa_addr = 0x60    -- /IOR & /IOW high
    isa_ior = high
    isa_iow = high
    isa_reset = low
    isa_data_direction = all_input
  
    -- assert "ISA reset"
    delay_100ms
    isa_reset = high
    
    delay_10ms
    isa_reset = low
    delay_10ms
    
    -- TODO: not sure if this next reset is required, 
    -- or even correct.
    v = net_read(RESETPORT)
    net_write(RESETPORT, v)
    delay_100ms
  end procedure
  

  
  
  

  netconf.jal modifications to work with Eur's board, 28 pin PIC ONLY:

  -- the sentence "if debug_mode then..." 
  -- is a conditional compilation.
  const debug_mode = false
  
  -- External EEPROM in I2C pins
  const byte I2C_eeprom_active = false
  

  
  
  

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