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 #include "platform.h"
   7
   8 //IO Pins; these are for EZ430, not GoodFET/UIF
   9 #define SBWTCK  BIT3
  10 #define SBWTDIO BIT2
  11
  12 //This should be universal, move to jtag.h
  13 #define TCKTOCK CLRTCK,SETTCK
  14
  15 //If SBW is defined, rewrite JTAG functions to be SBW.
  16 #ifdef SBWREWRITE
  17 #define jtagsetup sbwsetup
  18
  19 // I/O Redefintions
  20 extern int tms, tdi, tdo;
  21 #define SETTMS tms=1
  22 #define CLRTMS tms=0
  23 #define SETTDI tdi=1
  24 #define CLRTDI tdi=0
  25 #define TCKTOCK clock_sbw()
  26 #define SETMOSI SETTDI
  27 #define CLRMOSI CLRTDI
  28 #define READMISO tdo
  29
  30 #endif
  31
  32 //! Enter SBW mode.
  33 void sbwsetup();
  34
  35 //! Handle a SBW request.
  36 void sbwhandle(u8 app, u8 verb, u8 len);
  37
  38 //! Perform a SBW bit transaction.
  39 void clock_sbw();
  40 //! Set the TCLK line, performing a transaction.
  41 void sbwSETTCLK();
  42 //! Clear the line.
  43 void sbwCLRTCLK();
  44
  45 // Macros
  46 #define SBWCLK() do { \
  47     P5OUT &= ~SBWTCK; \
  48     asm("nop");       \
  49     asm("nop");       \
  50     asm("nop");       \
  51     P5OUT |= SBWTCK;  \
  52   } while (0)
  53 #define SETSBWIO(x) do {                        \
  54   if (x)                                        \
  55     P5OUT |= SBWTDIO;                           \
  56   else                                          \
  57     P5OUT &= ~SBWTDIO;                          \
  58   } while (0)
  59 #undef RESTORETCLK
  60 #define RESTORETCLK do {                        \
  61     if(savedtclk) {                             \
  62       SETTCLK;                                  \
  63     } else {                                    \
  64       CLRTCLK;                                  \
  65     }                                           \
  66   } while (0);
  67 #undef SETTCLK
  68 #define SETTCLK do {                            \
  69     sbwSETTCLK();                               \
  70     savedtclk=1;                                \
  71   } while (0);
  72 #undef CLRTCLK
  73 #define CLRTCLK do {                            \
  74     sbwCLRTCLK();                               \
  75     savedtclk=0;                                \
  76   } while (0);
  77
  78 #undef SAVETCLK
  79 //Do nothing for this.
  80 #define SAVETCLK
  81
  82
  83