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 //IO Pins; these are for EZ430, not GoodFET/UIF
   7 #define SBWTCK  BIT3
   8 #define SBWTDIO BIT2
   9
  10 //This should be universal, move to jtag.h
  11 #define TCKTOCK CLRTCK,SETTCK
  12
  13 //If SBW is defined, rewrite JTAG functions to be SBW.
  14 #ifdef SBWREWRITE
  15 #define jtagsetup sbwsetup
  16
  17 // I/O Redefintions
  18 extern int tms, tdi, tdo;
  19 #define SETTMS tms=1
  20 #define CLRTMS tms=0
  21 #define SETTDI tdi=1
  22 #define CLRTDI tdi=0
  23 #define TCKTOCK clock_sbw()
  24 #define SETMOSI SETTDI
  25 #define CLRMOSI CLRTDI
  26 #define READMISO tdo
  27
  28 #endif
  29
  30 //! Enter SBW mode.
  31 void sbwsetup();
  32
  33 //! Handle a SBW request.
  34 void sbwhandle(u8 app, u8 verb, u8 len);
  35
  36 //! Perform a SBW bit transaction.
  37 void clock_sbw();
  38 //! Set the TCLK line, performing a transaction.
  39 void sbwSETTCLK();
  40 //! Clear the line.
  41 void sbwCLRTCLK();
  42
  43 // Macros
  44
  45 #define SBWCLK() do { \
  46     P5OUT &= ~SBWTCK; \
  47     asm("nop");       \
  48     asm("nop");       \
  49     asm("nop");       \
  50     P5OUT |= SBWTCK;  \
  51   } while (0)
  52 #define SETSBWIO(x) do {                        \
  53   if (x)                                        \
  54     P5OUT |= SBWTDIO;                           \
  55   else                                          \
  56     P5OUT &= ~SBWTDIO;                          \
  57   } while (0)
  58 #undef RESTORETCLK
  59 #define RESTORETCLK do {                        \
  60     if(savedtclk) {                             \
  61       SETTCLK;                                  \
  62     } else {                                    \
  63       CLRTCLK;                                  \
  64     }                                           \
  65   } while (0);
  66 #undef SETTCLK
  67 #define SETTCLK do {                            \
  68     sbwSETTCLK();                               \
  69     savedtclk=1;                                \
  70   } while (0);
  71 #undef CLRTCLK
  72 #define CLRTCLK do {                            \
  73     sbwCLRTCLK();                               \
  74     savedtclk=0;                                \
  75   } while (0);
  76
  77 #undef SAVETCLK
  78 //Do nothing for this.
  79 #define SAVETCLK
  80
  81
  82