case about nRF9160 uart0 uart1 uart2 uart3

[peter.min]

Hi,

1. Please provide me with an example in which UART0, UART1, uart2, and uART3 are enabled

2. The sending and receiving rate of each UART must reach 1,000,000 baud rate

3. Each UART sends and receives a maximum of 2048 bytes

DK:PCA10090

SDK:ncs v2.0.0

Thank you for all your assistance.
Kind regards,
Peter.Min

[AHaug]

Hi Peter,

We don't have any samples that explains ONLY setting up UART, as our samples often illustrates multiple functionalities. But our nRF Connect SDK Fundamentals course regarding UART topic which you may find at our academy pages explains how the UART driver works and how to customize the UART in device tree file. This together topic 2 and topic 3 which gives you insight in how the devicetree and configuration files will allow you to enable all 4 UARTS.

Additional resources is the central uart and peripheral uart samples that illustrates how two devices uses the NUS Client to send data back and forth between a UART connection and a Bluetooth LE connection, emulating a serial port over Bluetooth LE.

Let me know if this clarifies things for you,

Kind regards 
Andreas

[peter.min]

Hi AHaug,

I used this example fund_less5_exer1_solution as a template.

I make the following changes

CONFIG_TFM_UART1_TXD_PIN=10
CONFIG_TFM_UART1_RXD_PIN=11
CONFIG_TFM_SECURE_UART1=y

But UART1 did not take effect

How can I modify UART1 to take effect

nRF9160_uart_4.zip

Thank you for all your assistance.
Kind regards,
Peter.Min

[peter.min]

Hi AHaug,

I failed to increment UART1

How do I add UART1 to the default example

Thank you for all your assistance.
Kind regards,
Peter.Min

[AHaug]

I need more information to understand what you are struggling with. 

1. What is the default example?
2. Did you flash the sample in nRF9160_uart_4.zip to a device and connect the device to a terminal and check if you were able to toggle the board lights with a keyboard?
3. Do you get any error messages or logs when you try to add uart to your application? If so, please supply them

Kind regards,
Andreas

[peter.min]

Hi AHaug,

I solved the problem

Need to modify: nrF9160Dk_nrf9160_ns.dts

/* Disable UART1, because it is used by default in TF-M */

/*

&uart1 {

    status = "disabled";

};

*/

The following is the test code

0068.nRF9160_uart_4.zip

Thank you for all your assistance.
Kind regards,
Peter.Min