SPI_Serial_Peripheral_Interface_Verilog_Modules/spi_defines.v at main · daringpatil3134/SPI_Serial_Peripheral_Interface_Verilog_Modules · GitHub

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//
// Clock Generator Divider Length
//

`define SPI_DIVIDER_LEN_8
//`define SPI_DIVIDER_LEN_16
//`define SPI_DIVIDER_LEN_24
//`define SPI_DIVIDER_LEN_32

`ifdef SPI_DIVIDER_LEN_8
  `define SPI_DIVIDER_LEN      2   // Can be set from 1 to 8
  //`define SPI_DIVIDER_LEN      4   // Can be set from 1 to 8
`endif

`ifdef SPI_DIVIDER_LEN_16
  `define SPI_DIVIDER_LEN      16  // Can be set from 1 to 16
`endif

`ifdef SPI_DIVIDER_LEN_24
  `define SPI_DIVIDER_LEN      24  // Can be set from 1 to 24
`endif

`ifdef SPI_DIVIDER_LEN_32
  `define SPI_DIVIDER_LEN      32  // Can be set from 1 to 32
`endif


//
// Max Number Of Bits That Can Be Sent/Recieved At Once
//

`define SPI_MAX_CHAR_8
//`define SPI_MAX_CHAR_16
//`define SPI_MAX_CHAR_24
//`define SPI_MAX_CHAR_32
//`define SPI_MAX_CHAR_64
//`define SPI_MAX_CHAR_128

`ifdef SPI_MAX_CHAR_8
  `define SPI_MAX_CHAR 8
  `define SPI_CHAR_LEN_BITS 3
`endif

`ifdef SPI_MAX_CHAR_16
  `define SPI_MAX_CHAR 16
  `define SPI_CHAR_LEN_BITS 4
`endif

`ifdef SPI_MAX_CHAR_24
  `define SPI_MAX_CHAR 24
  `define SPI_CHAR_LEN_BITS 5
`endif

`ifdef SPI_MAX_CHAR_32
  `define SPI_MAX_CHAR 32
  `define SPI_CHAR_LEN_BITS 5
`endif

`ifdef SPI_MAX_CHAR_64
  `define SPI_MAX_CHAR 64
  `define SPI_CHAR_LEN_BITS 6
`endif

`ifdef SPI_MAX_CHAR_128
  `define SPI_MAX_CHAR 128
  `define SPI_CHAR_LEN_BITS 7
`endif


//
// Number of Devices Select Signals
//

`define SPI_SS_NB_8
//`define SPI_SS_NB_16
//`define SPI_SS_NB_24
//`define SPI_SS_NB_32

`ifdef SPI_SS_NB_8
  `define SPI_SS_NB 8
`endif
`ifdef SPI_SS_NB_16
  `define SPI_SS_NB 16
`endif
`ifdef SPI_SS_NB_24
  `define SPI_SS_NB 24
`endif
`ifdef SPI_SS_NB_32
  `define SPI_SS_NB 32
`endif


//
// Register Offsets
//

`define SPI_RX_0    5'b00000
`define SPI_RX_1    5'b00100
`define SPI_RX_2    5'b01000
`define SPI_RX_3    5'b01100
`define SPI_TX_0    5'b00000
`define SPI_TX_1    5'b00100
`define SPI_TX_2    5'b01000
`define SPI_TX_3    5'b01100
`define SPI_CTRL    5'b10000
`define SPI_DIVIDE  5'b10100
`define SPI_SS      5'b11000


//
// No. of Bits in CTRL Register
//

`define SPI_CTRL_BIT_NB 14


//
// Control Register Bit Position
//

`define SPI_CTRL_ASS          13
`define SPI_CTRL_IE           12
`define SPI_CTRL_LSB          11
`define SPI_CTRL_TX_NEGEDGE   10
`define SPI_CTRL_RX_NEGEDGE   9
`define SPI_CTRL_GO           8
`define SPI_CTRL_RES_1        7
`define SPI_CTRL_CHAR_LEN     6:0