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 "platform.h"
  10 #include "command.h"
  11 #include "app.h"
  12
  13 //IO Pins; these are for EZ430, not GoodFET/UIF
  14 #define SBWTCK  BIT3
  15 #define SBWTDIO BIT2
  16
  17 //This should be universal, move to jtag.h
  18 #define TCKTOCK CLRTCK,SETTCK
  19
  20 //If SBW is defined, rewrite JTAG functions to be SBW.
  21 #ifdef SBWREWRITE
  22 #define jtagsetup sbwsetup
  23
  24 // I/O Redefintions
  25 extern int tms, tdi, tdo;
  26 #define SETTMS tms=1
  27 #define CLRTMS tms=0
  28 #define SETTDI tdi=1
  29 #define CLRTDI tdi=0
  30 #define TCKTOCK clock_sbw()
  31 #define SETMOSI SETTDI
  32 #define CLRMOSI CLRTDI
  33 #define READMISO tdo
  34
  35 #endif
  36
  37 //! Enter SBW mode.
  38 void sbwsetup();
  39
  40 //! Handle a SBW request.
  41 void sbwhandle(u8 app, u8 verb, u8 len);
  42
  43 //! Perform a SBW bit transaction.
  44 void clock_sbw();
  45 //! Set the TCLK line, performing a transaction.
  46 void sbwSETTCLK();
  47 //! Clear the line.
  48 void sbwCLRTCLK();
  49
  50 // Macros
  51 #define SBWCLK() do { \
  52     P5OUT &= ~SBWTCK; \
  53     asm("nop");       \
  54     asm("nop");       \
  55     asm("nop");       \
  56     P5OUT |= SBWTCK;  \
  57   } while (0)
  58 #define SETSBWIO(x) do {                        \
  59   if (x)                                        \
  60     P5OUT |= SBWTDIO;                           \
  61   else                                          \
  62     P5OUT &= ~SBWTDIO;                          \
  63   } while (0)
  64 #undef RESTORETCLK
  65 #define RESTORETCLK do {                        \
  66     if(savedtclk) {                             \
  67       SETTCLK;                                  \
  68     } else {                                    \
  69       CLRTCLK;                                  \
  70     }                                           \
  71   } while (0);
  72 #undef SETTCLK
  73 #define SETTCLK do {                            \
  74     sbwSETTCLK();                               \
  75     savedtclk=1;                                \
  76   } while (0);
  77 #undef CLRTCLK
  78 #define CLRTCLK do {                            \
  79     sbwCLRTCLK();                               \
  80     savedtclk=0;                                \
  81   } while (0);
  82
  83 #undef SAVETCLK
  84 //Do nothing for this.
  85 #define SAVETCLK
  86
  87 #endif // SBW_H
  88