spi_defines.v

SPI 总线协议源码SPI 总线协议源码SPI 总线协议源码

`define SPI_DIVIDER_LEN_16


`ifdef SPI_DIVIDER_LEN_8
  `define SPI_DIVIDER_LEN       8    // Can be set from 1 to 8
`endif                                                          
`ifdef SPI_DIVIDER_LEN_16                                       
  `define SPI_DIVIDER_LEN       16   // Can be set from 9 to 16
`endif                                                          
`ifdef SPI_DIVIDER_LEN_24                                       
  `define SPI_DIVIDER_LEN       24   // Can be set from 17 to 24
`endif                                                          
`ifdef SPI_DIVIDER_LEN_32                                       
  `define SPI_DIVIDER_LEN       32   // Can be set from 25 to 32 
`endif

//
`define SPI_MAX_CHAR_128
//`define SPI_MAX_CHAR_64

`ifdef SPI_MAX_CHAR_128
  `define SPI_MAX_CHAR          128  // Can only be set to 128 
  `define SPI_CHAR_LEN_BITS     7
`endif
`ifdef SPI_MAX_CHAR_64
  `define SPI_MAX_CHAR          64   // Can only be set to 64 
  `define SPI_CHAR_LEN_BITS     6
`endif
`ifdef SPI_MAX_CHAR_32
  `define SPI_MAX_CHAR          32   // Can be set from 25 to 32 
  `define SPI_CHAR_LEN_BITS     5
`endif
`ifdef SPI_MAX_CHAR_24
  `define SPI_MAX_CHAR          24   // Can be set from 17 to 24 
  `define SPI_CHAR_LEN_BITS     5
`endif
`ifdef SPI_MAX_CHAR_16
  `define SPI_MAX_CHAR          16   // Can be set from 9 to 16 
  `define SPI_CHAR_LEN_BITS     4
`endif
`ifdef SPI_MAX_CHAR_8
  `define SPI_MAX_CHAR          8    // Can be set from 1 to 8 
  `define SPI_CHAR_LEN_BITS     3
`endif

// Number of device select signals

`define SPI_SS_NB_8


`ifdef SPI_SS_NB_8
  `define SPI_SS_NB             8    // Can be set from 1 to 8
`endif
`ifdef SPI_SS_NB_16
  `define SPI_SS_NB             16   // Can be set from 9 to 16
`endif
`ifdef SPI_SS_NB_24
  `define SPI_SS_NB             24   // Can be set from 17 to 24
`endif
`ifdef SPI_SS_NB_32
  `define SPI_SS_NB             32   // Can be set from 25 to 32
`endif

// Bits of WISHBONE address 

`define SPI_OFS_BITS	          4:2
`define SPI_RX_0                0
`define SPI_RX_1                1
`define SPI_RX_2                2
`define SPI_RX_3                3
`define SPI_TX_0                0
`define SPI_TX_1                1
`define SPI_TX_2                2
`define SPI_TX_3                3
`define SPI_CTRL                4
`define SPI_DEVIDE              5
`define SPI_SS                  6

// Number 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