z-stack modifications for using cc2592 rf front end with cc2538

Dear Yk Chen
In that document not mentioned the compilation flags and power amplifier modifications are not mentioned.

If you use Z-Stack, you have to define HAL_PA_LNA_CC2592 in your compile options.

Dear Yk Chen

is that only one compilation flag is enough or any .h files are included or any register settings are needed?

Dear Yk Chen
I am using Z-stack home 1.2.0 in the Z-stack home 1.2.0 firmware not mentioned about cc2592.in that firmware mentioned about the cc2590,cc2591.
is the compilation flag is HAL_PA_LNA or HAL_PA_LNA_CC2592?
if the compilation flag is HAL_PA_LNA_CC2592 then no code is compiled in Z-stack home1.2.0 because no #define condition for cc2592.

in the Z-stack home1.2.0 the register settings are
/* RF observable control register value to output PA signal */
#define RFC_OBS_CTRL_PA_PD_INV 0x68UL

/* RF observable control register value to output LNA signal */
#define RFC_OBS_CTRL_LNAMIX_PD_INV 0x6AUL

/* OBSSELn register value to select RF observable 0 */
#define OBSSEL_OBS_CTRL0 0x80

/* OBSSELn register value to select RF observable 1 */
#define OBSSEL_OBS_CTRL1 0x81

/* PC3 -> PAEN */
RFC_OBS_CTRL0 = RFC_OBS_CTRL_PA_PD_INV;
OBSSEL3 = OBSSEL_OBS_CTRL0;

/* PC2 -> EN (LNA control) */
RFC_OBS_CTRL1 = RFC_OBS_CTRL_LNAMIX_PD_INV;
OBSSEL2 = OBSSEL_OBS_CTRL1;

But in datasheet mentioned that
CC2538 Register Reccommened Value
CCTEST_OBSSEL2 0x80
CCTEST_OBSSEL3 0x81
RFC_OBS_CTRL0 0x6A
RFC_OBS_CTRL1 0x68

Both are not matched. which one is correct?

Dear Yk Chen

What you said is ok. we want to also use Z-stack 1.2.2

in the Z-stack home1.2.2 the register settings are
/* RF observable control register value to output PA signal */
#define RFC_OBS_CTRL_PA_PD_INV 0x68UL

/* RF observable control register value to output LNA signal */
#define RFC_OBS_CTRL_LNAMIX_PD_INV 0x6AUL

/* OBSSELn register value to select RF observable 0 */
#define OBSSEL_OBS_CTRL0 0x80

/* OBSSELn register value to select RF observable 1 */
#define OBSSEL_OBS_CTRL1 0x81

/* PC3 -> PAEN */
RFC_OBS_CTRL0 = RFC_OBS_CTRL_PA_PD_INV;
OBSSEL3 = OBSSEL_OBS_CTRL0;

/* PC2 -> EN (LNA control) */
RFC_OBS_CTRL1 = RFC_OBS_CTRL_LNAMIX_PD_INV;
OBSSEL2 = OBSSEL_OBS_CTRL1;

But in datasheet mentioned that
CC2538 Register Reccommened Value
CCTEST_OBSSEL2 0x80
CCTEST_OBSSEL3 0x81
RFC_OBS_CTRL0 0x6A
RFC_OBS_CTRL1 0x68

Both are not matched. which one is correct?

I don't see those recommended value in CC2538 datasheet. I suggest you to follow the source code of Z-Stack Home 1.2.2 because I have done field test with it and see no problem on it.

Thank you sir.

You are welcome.

Dear Yk Chen

How to change the default power as 22dbm in Z-stack-Home 1.2.2 firmware ?

You can try to use API macRadioSetTxPower, for example

//Set TX power to 16 dbm
macRadioSetTxPower(16);

Dear Yk Chen
i want to set the power as 22dbm . How can i set that power in Z-stack Firmware(like default channel, default Panid) Without sending any command from external processor to zigbee chip?

Dear Yk Chen
In the above code where should i set the default power as 22dbm?

As I reply in previous post, the default TX power is 22 dbm, which is defined by "22, /* tramsmit power level of the first entry */".

is any compilation flags are required for receiver high and low gain modes?

High gain mode is default when you define HAL_PA_LNA_CC2592.

Hi guys,

As Venkata told, in Application Report SWRA447 says that:

CCTEST_OBSSEL2 = 0x80;

CCTEST_OBSSEL3 = 0x81;

But in Z-Stack Home 1.2.2a.44539 these values appears to be exchanged.

Should I have to change it in my firmware as the offical draft tell us?

I would suggest you to change it according to Z-Stack Home 1.2.2a.44539.