Configuration UARTE with nrf52805 for ESB

RE: Configuration UARTE with nrf52805 for ESB

Ilary — Fri, 24 Sep 2021 09:10:31 GMT

Hello,
I did some tests with the oscilloscope directly connected to pins 21 and 18 of the nrf52805.
The transmission on pin 18 by the Stm8l works perfectly. The problem I encounter now is that nrf52805 I have the pull up instruction on this pin

nrf_gpio_cfg_input(PORTA_RXD,GPIO_PIN_CNF_PULL_Pullup);

but nothing happens when oscilloscopes.
It could be that I get the pin definition wrong initially

#define UARTE_BASE           0x40002000
  #define PORT_UARTE          ((NRF_UARTE_Type *) UARTE_BASE )
  #define PIN_TXD            21
  #define PIN_RXD            18

or the pull up configuration of pin 18, set as input and pin 21 as output?

 nrf_gpio_cfg_input(PIN_RXD,GPIO_PIN_CNF_PULL_Pullup);
 nrf_gpio_cfg_output(PIN_TXD);

RE: Configuration UARTE with nrf52805 for ESB

Ilary — Fri, 24 Sep 2021 06:22:29 GMT

Thanks,

is there a particular method to include new libraries in the project? because looking at the example uses the library app_uart.h and the app_uart_fifo.h that is not included in the ESB project.

RE: Configuration UARTE with nrf52805 for ESB

Sigurd — Thu, 23 Sep 2021 14:43:03 GMT

You should take a look at the uart example then.

<SDK_InstallFolder>\examples\peripheral\uart

https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/uart_example.html

RE: Configuration UARTE with nrf52805 for ESB

Ilary — Thu, 23 Sep 2021 14:11:59 GMT

I used nRF5 SDK 17.0.2

RE: Configuration UARTE with nrf52805 for ESB

Sigurd — Thu, 23 Sep 2021 14:02:59 GMT

We have examples that uses the UART you should take a look at. What SDK are you using? nRF5 SDK or nRF Connect SDK?

RE: Configuration UARTE with nrf52805 for ESB

Ilary — Thu, 23 Sep 2021 08:25:10 GMT

hello,

I have a doubt, the data that is passed how can I be sure to read it correctly?

currently I try to read the value to which the RX buffer points but I'm not sure if it is the correct method

RE: Configuration UARTE with nrf52805 for ESB

Ilary — Wed, 22 Sep 2021 11:34:19 GMT

thanks, I deleted the defined indicated but I still do not get the value that I send in serial. Could it be a configuration issue?

RE: Configuration UARTE with nrf52805 for ESB

Sigurd — Wed, 22 Sep 2021 11:18:21 GMT

Hi,

[quote user=""]the pin 21 of the nrf52805[/quote]

Pin 21 is also configurable as a reset-pin. https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf52805%2Fpin.html

So this might be the reason for the issue you are seeing.

Try using a different pin if possible.

If that is not possible for you, then you need to remove the preprocessor define CONFIG_GPIO_AS_PINRESET