hello There,
I am trying to control my AD9361 RF Transceiver device using the driver availale on GitHub (no-OS_R2021) and using petalinux 2021.2 OS.
i am able to Control the LO frequency but not able to increase or decrease the attenuation its always visiable fix ( -40dBm).
trying to Control Attenuation via using wrapper function "ad9361_set_tx_attenuation(ad9361_phy,0,set_attenuation_mdb);"
cnt = 0;
/*
* Set the transmit attenuation for the selected channel.
* @param phy The AD9361 current state structure.
* @param ch The desired channel number (TX1, TX2).
* Accepted values in 2x2 mode:
* TX1 (0)
* TX2 (1)
* Accepted values in 1x1 mode:
* TX1 (0)
* @param attenuation_mdb The attenuation (mdB). Example: 10000 (10 dB)
* @return 0 in case of success, negative error code otherwise.
int32_t ad9361_set_tx_attenuation (struct ad9361_rf_phy *phy,
uint8_t ch, uint32_t attenuation_mdb)
*/
printf("\n User Defined Attenuation via wrapper..........\n");
set_attenuation_mdb = 0;
while(cnt<=10)
{
printf("#.Eneter the Attenuation value : ");
scanf("%" SCNu64,&set_attenuation_mdb);
printf("16. Setting tx_attenuation= %d \n",set_attenuation_mdb);
ret_val = ad9361_set_tx_attenuation(ad9361_phy,0,set_attenuation_mdb);
printf("ret_val (ad9361_set_tx_attenuation ch-0) = %d \n",ret_val);
ret_val = ad9361_set_tx_attenuation(ad9361_phy,1,set_attenuation_mdb);
printf("ret_val (ad9361_set_tx_attenuation ch-1) = %d \n",ret_val);
cnt++;
no_os_mdelay(500);
}
then i have tried control using direct writing to SPI registers
writing 255 ot user define data on address 0x073 (first 8 bit) and at address 0x074 (last 9 bit) along with tried both Setting and resetting bit no 6 of address 0x077
and also setting and resseting bit no 6 of address 0x07C.
cnt = 0;
printf("\n User Defined Attenuation via Register..........\n");
while(cnt<=5)
{
ret_val = ad9361_spi_read(ad9361_phy->spi,REG_TX1_ATTEN_0);//,Atten_Config1);
printf("READ: ret_val (REG_TX1_ATTEN_0,Atten_Config1) = %d \n",ret_val);
ret_val = ad9361_spi_read(ad9361_phy->spi,REG_TX1_ATTEN_1);//,Atten_Config2);
printf("READ: ret_val (REG_TX1_ATTEN_1,Atten_Config2) = %d \n",ret_val);
ret_val = ad9361_spi_read(ad9361_phy->spi,REG_TX_ATTEN_OFFSET);//,Atten_Config3);
printf("READ: ret_val (REG_TX_ATTEN_OFFSET,Atten_Config3) = %d \n\n",ret_val);
ret_val = ad9361_spi_read(ad9361_phy->spi,REG_TX2_DIG_ATTEN);//,Atten_Config4);
printf("READ: ret_val (REG_TX2_DIG_ATTEN,Atten_Config4) = %d \n\n",ret_val);
printf("#.Eneter the REG_TX1_ATTEN_0 for register Atten_Config1: ");
scanf("%" SCNu32,&Atten_Config1);
printf("# Setting REG_TX1_ATTEN_0= %d \n",Atten_Config1);
printf("#.Eneter the REG_TX_ATTEN_OFFSET for register Atten_Config3: ");
scanf("%" SCNu32,&Atten_Config3);
printf("# Setting REG_TX_ATTEN_OFFSET = %d \n",Atten_Config3);
printf("#.Eneter the REG_TX2_DIG_ATTEN for register Atten_Config4: ");
scanf("%" SCNu32,&Atten_Config4);
printf("# Setting REG_TX2_DIG_ATTEN = %d \n",Atten_Config4);
ret_val = ad9361_spi_write(ad9361_phy->spi,REG_TX1_ATTEN_0,Atten_Config1);
printf("ret_val (REG_TX1_ATTEN_0,Atten_Config1) = %d \n",ret_val);
ret_val = ad9361_spi_write(ad9361_phy->spi,REG_TX1_ATTEN_1,Atten_Config2);
printf("ret_val (REG_TX1_ATTEN_1,Atten_Config2) = %d \n",ret_val);
ret_val = ad9361_spi_write(ad9361_phy->spi,REG_TX_ATTEN_OFFSET,Atten_Config3);
printf("ret_val (REG_TX_ATTEN_OFFSET,Atten_Config3) = %d \n\n",ret_val);
ret_val = ad9361_spi_write(ad9361_phy->spi,REG_TX2_DIG_ATTEN,Atten_Config4);
printf("ret_val (REG_TX2_DIG_ATTEN,Atten_Config4) = %d \n\n",ret_val);
cnt++;
no_os_mdelay(500);
}
return value for both read and write is zero (no issue observed), but still not able to increase or decrease the attenuation.
please help me where i am wrong .
regards
