run-time gain control for hopping mode of LO MUX preprocess

Hi JimmyChen,

Have you tried the steps suggested in the forum post that you quoted?
More specifically, this section for the setup parameters:

.gainSetupByPin = true,
.gainSetupByPinConfig = { {
.numRxGainTableEntries = 8,
.rxGainTable = { 255, 252, 248, 245, 240, 237, 235, 232 },
.numTxAttenTableEntries = 8,
.txAttenTable = { 12000, 12600, 13200, 13800, 14400, 15000, 15600, 16200 },
.numGainCtrlPins = 3,
.gainSelectGpioConfig = { {
.pin = ADI_ADRV9001_GPIO_DIGITAL_01,
.polarity = ADI_ADRV9001_GPIO_POLARITY_NORMAL,
.master = ADI_ADRV9001_GPIO_MASTER_BBIC}, {
.pin = ADI_ADRV9001_GPIO_DIGITAL_02,
.polarity = ADI_ADRV9001_GPIO_POLARITY_NORMAL,
.master = ADI_ADRV9001_GPIO_MASTER_BBIC}, {
.pin = ADI_ADRV9001_GPIO_DIGITAL_03,
.polarity = ADI_ADRV9001_GPIO_POLARITY_NORMAL,
.master = ADI_ADRV9001_GPIO_MASTER_BBIC} }}

The cruical part to understand here is that using combinational logic to set the gain index (i.e.3 pins = 8 gain values) only works at the hop edge, as that is when the sampling occurs. At any other time (in pin mode), the gain is controlled using the increment/decrement pins.

Kind Regards,
Michał

Hi M_Bugajski,

Thanks very much for your reply.

Your description of "only works at the hop edge" seems meeting my understanding, and the combination of 8 gain values and gain step control also meets my requirement.

The main problem what I want to inquire about is how to configure the gain control mode to "this combination" via IIO commands (because the driver is implemented on ARM with OS).

Thanks.

Hi JimmyChen,

For queries related to Linux and IIO, you should use the Linux Software Drivers forum.

Here, we only support the product line SDK package. You can see the various options available to you here.

Kind Regards,
Michał