TSIP A-law Hardware Companding

Hi to all

i success to run TSIP example (TSIP_evmc6678_c66exampleProject from pdk_c667x_2_0_0) on c6678 EVM and receive correct data in TSIP receive buffer (in linear mode) but when i try to using A-law hardware Companding , receive only 0 and 0x80 .

config change from linear mode to A-law :

in TSConfig_Enable() function:

ctl->compand = CSL_TSIP_TIMESLOT_ALAW; 

//EA: CSL_TSIP_TIMESLOT_LINEAR -> CSL_TSIP_TIMESLOT_ALAW

in tsipConfig() function

sizeCfg->wordSize = 16;//EA: 8 -> 16

in tsip_cfg.h

 *  @def  TSIP_ELEMENT_BUF_SIZE
 *        The number of bytes allocated for each timeslot in the dma buffer.
 *        Set to 1 unless hardware companding is used
 */
#define TSIP_ELEMENT_BUF_SIZE    2 //EA:for A-law 1->2

i can't find example or sufficient API document about this feature. anybody can guide me how to use hardware compading in TSIP ?

thanks

Ebi