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modules: shell: Add wait before UARTs are suspended #460

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Nov 8, 2024
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modules: shell: Add wait before UARTs are suspended #460

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6 changes: 6 additions & 0 deletions app/src/modules/shell/shell.c
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,12 @@ static void uart_disable_handler(struct k_work *work)
}
#endif

/* Wait for UART buffers to be emptied before suspending.
* If a transfer is ongoing, the driver will cause an assertion to fail.
* 100 ms is an arbitrary value that should be enough for the buffers to empty.
*/
k_busy_wait(100 * USEC_PER_MSEC);

if (device_is_ready(uart1_dev)) {
pm_device_action_run(uart1_dev, PM_DEVICE_ACTION_SUSPEND);
}
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