NRF5340 UART completely turn off and turn on dynamically in app program

RE: NRF5340 UART completely turn off and turn on dynamically in app program

Simon — Wed, 22 Jun 2022 14:44:01 GMT

[quote user="saeed mahvis"]So I will try my own program by v1.9.1 and inform you[/quote]

Sounds good👍

RE: NRF5340 UART completely turn off and turn on dynamically in app program

saeed mahvis — Wed, 22 Jun 2022 13:46:51 GMT

Your hello_world_disable_uart_runtime was compiled with no errors in NCS v1.9.1 but in version

v1.8.0 it couldn't be compiled. So I will try my own program by v1.9.1 and inform you

B.S

RE: NRF5340 UART completely turn off and turn on dynamically in app program

saeed mahvis — Wed, 22 Jun 2022 13:18:47 GMT

Hi again

Yes I have added #include <pm/device.h> at the top. But the NCS version I am using is v1.8.0

I will install your version and try it again and inform you. Thank you for your response

RE: NRF5340 UART completely turn off and turn on dynamically in app program

Simon — Wed, 22 Jun 2022 13:11:54 GMT

Did you add #include <pm/device.h> at the top? What version of NCS are you using?

Here I added pm_device_action_run to the hello world sample in NCS v1.9.1 and it built anbd ran successfully:

devzone.nordicsemi.com/.../hello_5F00_world_5F00_disable_5F00_uart_5F00_runtime.zip

Here I used a delay between the calls, but that may cause some issues as mentioned in this ticket: NCS Uart Console Suspend Before Log Outpput

Best regards,

Simon

RE: NRF5340 UART completely turn off and turn on dynamically in app program

saeed mahvis — Wed, 22 Jun 2022 12:37:49 GMT

Hi Simon

I have added CONFIG_PM_DEVICE=y in the prj.config and also added the modem shell sample code in my program.

I only used the code for uart0. But the sdk can not recognize pm_device_action_run() function and issued

(undefined reference to `pm_device_action_run')

static void uart0_set_enable(bool enable)
{
	const struct device *uart_dev = DEVICE_DT_GET(DT_NODELABEL(uart0));

	if (!device_is_ready(uart_dev)) {
		return;
	}

	pm_device_action_run(uart_dev, enable ? PM_DEVICE_ACTION_RESUME : PM_DEVICE_ACTION_SUSPEND);
}
void disable_uarts(void)
{
	uart0_set_enable(false);
	//uart1_set_enable(false);
}

void enable_uarts(void)
{
	uart0_set_enable(true);
	//uart1_set_enable(true);
}

error.

RE: NRF5340 UART completely turn off and turn on dynamically in app program

Simon — Wed, 22 Jun 2022 11:36:19 GMT

To enable/disable UART dynamically in your program you can set CONFIG_PM_DEVICE=y and use pm_device_action_run(). Check out the modem shell sample to see how to use this function.

Best regards,

Simon