How to vary gain of amplifier MCP6S21 using nrf52832?

[Pooja Vernekar]

Im using MCP6S21 amplifier which takes input from some I to V converter and output of amplifier is connected to nrf52832 via I2C pins so how to change or vary gain of amplifier im not able to find commands to be used for program 

please suggest

[awneil]

Pooja Vernekar said:

not able to find commands to be used for program

They are defined by the "MCP6S21" and will be described in its documentation - they have nothing to do with the nRF52832 - the "MCP6S21" neither knows nor cares what microcontroller you use.

The "MCP6S21" is not a Nordic product - so you will have to go to its manufacturer's website for details.

Presumably, this "MCP6S21" will be an I2C Slave? Therefore the nRF must be the I2C Master.

The I2C controller in the nRF52832 is called "TWI". It is documented in the Product Specification:

https://infocenter.nordicsemi.com/topic/struct_nrf52/struct/nrf52832_ps.html

SDK software drivers are documented here:

infocenter.nordicsemi.com/.../hardware_drivers.html

SDK examples are here:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/examples_hw_peripheral_devices.html

[Pooja Vernekar]

Is there any amplifier based example in nrf52 sdk ? So that i can refer as im completely new to nrf52 .

[awneil]

Again, the amplifier is nothing to do with Nordic.

The amplifier neither knows nor cares what microcontroller you use.

The amplifier simply responds to the defined commands & sequences on the I2C bus.

Nordic provides examples of how to use the TWI peripheral to control an I2C Slave - any I2C Slave.

Pooja Vernekar said:

im completely new to nrf52

Do you have any experience with any other microcontroller(s) ?

The above would be exactly the same for any other microcontroller!

How To Interface Anything To Anything Else

[Kaja]

Hi Pooja,

please have a look at: radio notification, here is the documentation of API call. 


This blog post PA/LNA support in S132 will also be useful to you. 

Best regards,
Kaja

[awneil]

MCP6S21 isn't an RF amplifier!

https://www.microchip.com/wwwproducts/en/MCP6S21