swdp.h

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#ifndef SWDP_H
#define SWDP_H

#include "baselayer.h"
#include "gpio.h"
#include "config.h"
#define SWD_ACK 0b001
#define SWD_WAIT 0b010
#define SWD_FAULT 0b100
#define SWD_PARITY 0b1000
enum swdCommands {
  cmdInit         ,     
  cmdLowAccess    ,     
};
struct swdPacket {
  enum swdCommands    cmd : 8;  
  uint8_t             APnDP;    
  uint8_t             RnW;      
  uint8_t             adr;      
  uint32_t            val;      
}__attribute__((packed));
typedef struct swdPacket swdPacket_t;

class Swdp : public BaseLayer {

  public:
    Swdp ();
    void     Fini       (void);    
    uint32_t Up         (char* data, uint32_t len);
  protected:
    uint32_t Init               (void);
    uint32_t swdptap_init       (void);
    uint8_t  swdptap_low_access (uint8_t APnDP, uint8_t RnW, uint8_t addr, uint32_t* value);
    // Interní metody jsou dost rozsekané, ale funkční a přehledné.
    void turnaround (bool dir);                         
    bool bit_in     (void);                             
    void bit_out    (bool val);                         
    int  init       (void);                             
    void reset      (void);                             
    uint32_t seq_in        (int ticks);                 
    bool     seq_in_parity (uint32_t *ret, int ticks);  
    void     seq_out       (uint32_t MS,   int ticks);  
    void     seq_out_parity(uint32_t MS,   int ticks);  

  private:
    GpioClass   swdio, swclk;
    swdPacket   UxD;
    bool        olddir;
};

#endif // SWDP_H