swd.h

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/*
<Copyright 2011 mrd>

Usage of the works is permitted provided that this instrument is retained with the works, so that any entity that uses the works is notified of this instrument.

DISCLAIMER: THE WORKS ARE WITHOUT WARRANTY.
*/
// GPIO pins used for SWD
#define SWCLK_BIT 18
#define SWDIO_BIT 19

#define SWCLK_BIT_MSK (1<<SWCLK_BIT)
#define SWDIO_BIT_MSK (1<<SWDIO_BIT)

// Bit delay - pro 48MHz clock muze byt 0
#define BIT_DELAY 0

void swd_enable(void);
void swd_flush(void);

// SWD status responses. SWD_ACK is good.
enum SWD_RESPONSES {
  SWD_ACK    = 0b001,
  SWD_WAIT   = 0b010,
  SWD_FAULT  = 0b100,
  SWD_PARITY = 0b1000
};
enum SWD_RESPONSES swd_write(char APnDP, int A, unsigned long data);

enum SWD_RESPONSES swd_read(char APnDP, int A, volatile unsigned long *data);