Some bits of Spy-Bi-Wire support, thanks to Mark Rages. (Not yet complete.)

[goodfet] / firmware / include / sbw.h

diff --git a/firmware/include/sbw.h b/firmware/include/sbw.h
new file mode 100644 (file)
index 0000000..3ca6063
--- /dev/null
+++ b/firmware/include/sbw.h
@@ -0,0 +1,82 @@
+/*! \file sbw.h
+  \author Travis Goodspeed and Mark Rages
+  \brief Spy-Bi-Wire Stuff
+*/
+
+//IO Pins; these are for EZ430, not GoodFET/UIF
+#define SBWTCK  BIT3
+#define SBWTDIO BIT2
+
+//This should be universal, move to jtag.h
+#define TCKTOCK CLRTCK,SETTCK
+
+//If SBW is defined, rewrite JTAG functions to be SBW.
+#ifdef SBWREWRITE
+#define jtagsetup sbwsetup
+
+// I/O Redefintions
+extern int tms, tdi, tdo;
+#define SETTMS tms=1
+#define CLRTMS tms=0
+#define SETTDI tdi=1
+#define CLRTDI tdi=0
+#define TCKTOCK clock_sbw()
+#define SETMOSI SETTDI
+#define CLRMOSI CLRTDI
+#define READMISO tdo
+
+#endif
+
+//! Enter SBW mode.
+void sbwsetup();
+
+//! Handle a SBW request.
+void sbwhandle(u8 app, u8 verb, u8 len);
+
+//! Perform a SBW bit transaction.
+void clock_sbw();
+//! Set the TCLK line, performing a transaction.
+void sbwSETTCLK();
+//! Clear the line.
+void sbwCLRTCLK();
+
+// Macros
+
+#define SBWCLK() do { \
+    P5OUT &= ~SBWTCK; \
+    asm("nop");              \
+    asm("nop");              \
+    asm("nop");              \
+    P5OUT |= SBWTCK;  \
+  } while (0)
+#define SETSBWIO(x) do {                       \
+  if (x)                                       \
+    P5OUT |= SBWTDIO;                          \
+  else                                         \
+    P5OUT &= ~SBWTDIO;                         \
+  } while (0)
+#undef RESTORETCLK
+#define RESTORETCLK do {                       \
+    if(savedtclk) {                            \
+      SETTCLK;                                         \
+    } else {                                   \
+      CLRTCLK;                                 \
+    }                                          \
+  } while (0);
+#undef SETTCLK
+#define SETTCLK do {                           \
+    sbwSETTCLK();                              \
+    savedtclk=1;                               \
+  } while (0);
+#undef CLRTCLK
+#define CLRTCLK do {                           \
+    sbwCLRTCLK();                              \
+    savedtclk=0;                               \
+  } while (0); 
+
+#undef SAVETCLK
+//Do nothing for this.
+#define SAVETCLK 
+
+
+