git.rot13.org Git - goodfet/blob - firmware/include/sbw.h

   1 /*! \file sbw.h
   2   \author Travis Goodspeed and Mark Rages
   3   \brief Spy-Bi-Wire Stuff
   4 */
   5
   6 #ifndef SBW_H
   7 #define SBW_H
   8
   9 #include "app.h"
  10 extern app_t const sbw_app;
  11
  12 #define SBW 0x17
  13
  14 #include "platform.h"
  15 #include "command.h"
  16 #include "app.h"
  17
  18 //IO Pins; these are for EZ430, not GoodFET/UIF
  19 #define SBWTCK  BIT3
  20 #define SBWTDIO BIT2
  21
  22 //This should be universal, move to jtag.h
  23 #define TCKTOCK CLRTCK,SETTCK
  24
  25 //If SBW is defined, rewrite JTAG functions to be SBW.
  26 #ifdef SBWREWRITE
  27 #define jtagsetup sbwsetup
  28
  29 // I/O Redefintions
  30 extern int tms, tdi, tdo;
  31 #undef SETTMS
  32 #define SETTMS tms=1
  33 #undef CLRTMS
  34 #define CLRTMS tms=0
  35 #undef SETTDI
  36 #define SETTDI tdi=1
  37 #undef CLRTDI
  38 #define CLRTDI tdi=0
  39 #undef TCKTOCK
  40 #define TCKTOCK clock_sbw()
  41 #undef SETMOSI
  42 #define SETMOSI SETTDI
  43 #undef CLRMOSI
  44 #define CLRMOSI CLRTDI
  45 #undef READMISO
  46 #define READMISO tdo
  47
  48 #endif
  49
  50 //! Enter SBW mode.
  51 void sbwsetup();
  52
  53 //! Handle a SBW request.
  54 void sbw_handler_fn(u8 app, u8 verb, u32 len);
  55
  56 //! Perform a SBW bit transaction.
  57 void clock_sbw();
  58 //! Set the TCLK line, performing a transaction.
  59 void sbwSETTCLK();
  60 //! Clear the line.
  61 void sbwCLRTCLK();
  62
  63 // Macros
  64 #define SBWCLK() do { \
  65     SPIOUT &= ~SBWTCK; \
  66     asm("nop");       \
  67     asm("nop");       \
  68     asm("nop");       \
  69     SPIOUT |= SBWTCK;  \
  70   } while (0)
  71 #define SETSBWIO(x) do {                        \
  72   if (x)                                        \
  73     SPIOUT |= SBWTDIO;                          \
  74   else                                          \
  75     SPIOUT &= ~SBWTDIO;                         \
  76   } while (0)
  77 #undef RESTORETCLK
  78 #define RESTORETCLK do {                        \
  79     if(savedtclk) {                             \
  80       SETTCLK;                                  \
  81     } else {                                    \
  82       CLRTCLK;                                  \
  83     }                                           \
  84   } while (0);
  85 #undef SETTCLK
  86 #define SETTCLK do {                            \
  87     sbwSETTCLK();                               \
  88     savedtclk=1;                                \
  89   } while (0);
  90 #undef CLRTCLK
  91 #define CLRTCLK do {                            \
  92     sbwCLRTCLK();                               \
  93     savedtclk=0;                                \
  94   } while (0);
  95
  96 #undef SAVETCLK
  97 //Do nothing for this.
  98 #define SAVETCLK
  99
 100 #endif // SBW_H
 101