NRF52832 and CP2102 serial communication

RE: NRF52832 and CP2102 serial communication

RK — Mon, 06 Nov 2017 04:07:00 GMT

on the nRF series you can use any pins you like for any of the peripherals. You put the pin numbers into the registers for the peripheral. Usually you #define the pins you're actually using somewhere and use them in the registration function for the peripheral (which then writes them in the register).

RE: NRF52832 and CP2102 serial communication

SaiTeja — Mon, 06 Nov 2017 04:03:05 GMT

I made connections as you mentioned. It's working. Thank you once again. But I have a query, No where it is mentioned that P0.6 and P0.8 are Tx/Rx pins. How did you identify that we have to use these pins for serial communication ?

RE: NRF52832 and CP2102 serial communication

Matt — Sun, 05 Nov 2017 19:14:22 GMT

Oh I meant P0.06 and P0.08. I believe that's the default mapping used for uart tx/rx (I picked that up from the PCA10040 and use the same default pins for my custom board). The pdf may not explicitly mention this but once you spot the UART in page 12 of the same pdf you could infer the presence of uart tx/rx somewhere on the SoC :)

RE: NRF52832 and CP2102 serial communication

SaiTeja — Sun, 05 Nov 2017 17:56:11 GMT

If my understanding is correct , it is mentioned in the datasheet that pin 6 is analog input/GPIO and pin 8 is GPIO . No where it is mentioned that these pins correspond to Tx / Rx. Can you explain me the reason behind connecting pin 6 and pin 8 of nrf52832 to pin 25 & 26 of CP2102? I am refering to this datasheet infocenter.nordicsemi.com/.../nRF52832_PS_v1.0.pdf

Thank you for your valuable time

RE: NRF52832 and CP2102 serial communication

SaiTeja — Sun, 05 Nov 2017 16:03:38 GMT

Thank you very much. I will try this.

RE: NRF52832 and CP2102 serial communication

Turbo J — Sun, 05 Nov 2017 15:42:45 GMT

RTFM. You can have the UARTs RX and TX lines on any GPIO pin.

RE: NRF52832 and CP2102 serial communication

Matt — Sun, 05 Nov 2017 14:47:06 GMT

Hook up pins 25 & 26 on your CP2102 to the pins 6 and 8 on your nRF52832
Install whatever usb to virtual serial port driver in your windows environment
Your windows application should see a COM port which corresponds to the UART in your nRF52832

There is no jtag interface on the nRF52832; you must be talking about the JLink debugger connected to your custom board (not the PCA10040) through the SWD interface?

RE: NRF52832 and CP2102 serial communication

Matt — Sun, 05 Nov 2017 14:40:14 GMT

Can you not connect the pin 6 & 8 of nRF52832 to pin 25 & 26 of the CP2102? Why do you say there are no tx/rx pins on the nRF52832?

RE: NRF52832 and CP2102 serial communication

SaiTeja — Sun, 05 Nov 2017 14:10:02 GMT

I have seen the UART example given in SDK. As per my understanding , Jtag debugger is being used to transmit data serially to PC. In my custom board I want to use only NRF52832 IC. My application goes this way: My custom development board(NRF52832 based) will be connected to PC through USB. And I want to transmit data from NRF52832 IC to PC via USB. Please tell me how to achieve this. I am sorry if my question is trivial. Help me in this regard.And thanks a lot for your valuable time.

RE: NRF52832 and CP2102 serial communication

RK — Sun, 05 Nov 2017 13:45:46 GMT

You are making no sense at all. You want to talk to a CP2012 chip which has a UART interface. The nRF52832 has a UART peripheral, with RX/TX. There are numerous examples in the SDK of using UART. Your question makes no sense.

RE: NRF52832 and CP2102 serial communication

SaiTeja — Sun, 05 Nov 2017 13:17:01 GMT

Thank you for your reply. My requirement goes this way. I would like to design custom circuit board with nrf52832 IC . And I want to transmit data from nrf52832 IC to PC serially. How can I do that? NRF52832 does not has RX/TX pins for serial communication as per datasheet.

RE: NRF52832 and CP2102 serial communication

RK — Sun, 05 Nov 2017 10:59:52 GMT

What are you talking about? The CP2102 is a UART/USB bridge and the NRF52832 has UART peripherals on it. So you just .. hook it up.