CC2530: SFD

HI,

What configuration are you using to output SFD_SYNC? This config works for me for outputting CLK, DATA and SFD_SYNC on OBBSEL0, OBBSEL1, and OBBSEL4. I believe I picked those pins because they were easily accessible on the SmartRF05. Obviously you can change those to any OBBSEL you wish. By the way, are you outputting this on a sleepy device? If so, you must reconfigure the registers when coming out of sleep.

// in ZMain.c

// in Macros
/* RF observable control register value to output Sniffer CLK signal */
#define RFC_OBS_CTRL_SNIF_CLK     0x09
                
/* RF observable control register value to output Sniffer DATA signal */
#define RFC_OBS_CTRL_SNIF_DATA    0x08

/* RF observable control register value to output SFD_SYNC signal */
#define RFC_OBS_CTRL_SFD_SYNC     0x0F

/* OBSSELn register value to select RF observable 0 */
#define OBSSEL_OBS_CTRL0             0xFB

/* OBSSELn register value to select RF observable 1 */
#define OBSSEL_OBS_CTRL1             0xFC

/* OBSSELn register value to select RF observable 2 */
#define OBSSEL_OBS_CTRL2             0xFD

...
// in main() before osal_start_system()
#ifdef 
  RFC_OBS_CTRL0 = RFC_OBS_CTRL_SNIF_CLK;
  OBSSEL0              = OBSSEL_OBS_CTRL0;

  RFC_OBS_CTRL1 = RFC_OBS_CTRL_SNIF_DATA;
  OBSSEL1              = OBSSEL_OBS_CTRL1;

  RFC_OBS_CTRL2 = RFC_OBS_CTRL_SFD_SYNC;
  OBSSEL4              = OBSSEL_OBS_CTRL2;

  MDMTEST1 |= 0x04;        
#endif

...
// if using a sleepy device, in hal_sleep.c

// redefine the same macros from above in this file as well
/* RF observable control register value to output Sniffer CLK signal */
#define RFC_OBS_CTRL_SNIF_CLK     0x09
                
/* RF observable control register value to output Sniffer DATA signal */
#define RFC_OBS_CTRL_SNIF_DATA    0x08

/* RF observable control register value to output SFD_SYNC signal */
#define RFC_OBS_CTRL_SFD_SYNC     0x0F

/* OBSSELn register value to select RF observable 0 */
#define OBSSEL_OBS_CTRL0             0xFB

/* OBSSELn register value to select RF observable 1 */
#define OBSSEL_OBS_CTRL1             0xFC

/* OBSSELn register value to select RF observable 2 */
#define OBSSEL_OBS_CTRL2             0xFD

...
// in halSleep(), right after the call to HAL_SLEEP_TIMER_DISABLE_INT(), paste this code again:
#ifdef ZED_HW_SNIFFER  
  // Initialize integrated sniffer
  RFC_OBS_CTRL0 = RFC_OBS_CTRL_SNIF_CLK;
  OBSSEL0              = OBSSEL_OBS_CTRL0;

  RFC_OBS_CTRL1 = RFC_OBS_CTRL_SNIF_DATA;
  OBSSEL1              = OBSSEL_OBS_CTRL1;

  RFC_OBS_CTRL2 = RFC_OBS_CTRL_SFD_SYNC;
  OBSSEL4              = OBSSEL_OBS_CTRL2;

  MDMTEST1 |= 0x04;        
#endif

thank u for your reply.

it seems that I haven't adjust the oscilloscope well.  And I have a new question about SFD.

I observe that length of sfd_syn is about 1 ms . Are there any methods which can help me adjust the length of the signal?