about uart interrupt callback and mobile phone receive data in nRF52810

RE: about uart interrupt callback and mobile phone receive data in nRF52810

howard n2wx — Wed, 08 Aug 2018 17:31:02 GMT

You're welcome. I'm happy it helped you.

RE: about uart interrupt callback and mobile phone receive data in nRF52810

tony55723 — Wed, 08 Aug 2018 16:45:37 GMT

Thank you so mush , i've been stuck with this problem for two days.

I always thought I wanted to correspond to the number (Pin 2 = p0.00 ..........)

Your answer is very fast, really, thank you

RE: about uart interrupt callback and mobile phone receive data in nRF52810

howard n2wx — Wed, 08 Aug 2018 16:10:20 GMT

Try it with RX_PIN_NUMBER 9 . The pin assignments follow the GPIO numbering convention rather than the package pins (see https://devzone.nordicsemi.com/f/nordic-q-a/9837/problems-with-spi-on-nrf52-no-signal)

>After power on, the system continues to execute the printf in the code.

An RX pin assignment change may help. The event might be a framing error or something unexpected.

> The entry condition for function uart_event_handle should be external data.

For receive data that's correct

RE: about uart interrupt callback and mobile phone receive data in nRF52810

tony55723 — Wed, 08 Aug 2018 15:33:55 GMT

This is my circuit diagram

The other question, I don't think it should be.

The previous code picture, case APP_UART_DATA:

After power on, the system continues to execute the printf in the code.

The entry condition for function uart_event_handle should be external data.

Is my idea right?

RE: about uart interrupt callback and mobile phone receive data in nRF52810

howard n2wx — Wed, 08 Aug 2018 13:56:01 GMT

Do the pin assignments in uart_init() match your configuration? If you are using for ex one of the nice Fanstel modules you may need to change off the default pins.

RE: about uart interrupt callback and mobile phone receive data in nRF52810

tony55723 — Wed, 08 Aug 2018 12:51:54 GMT

Thank you for answer ,

UART debug tool all the printed messages are APP_UART_TX_EMPTY

But I want to print a message from the UART debug tool

In the end I'll send the data to mobile phone

Mobile app is my design, I've done it before

probably know that must to turn on notify ,

then to receive data from nRF52810.

RE: about uart interrupt callback and mobile phone receive data in nRF52810

Simon — Wed, 08 Aug 2018 12:12:35 GMT

What mobile app are you using to connect to the nRF52 chip? I assume you are using the nRF Connect app

[1] How do you know that it doesn’t enter uart_event_handle(..)? Have you tried to debug, and setting a breakpoint inside the function? Toggling a LED would also work.

Does the value of “TX Characteristics →Value” inside the nRF Connect app change after sending a message over the terminal (assuming you have enabled notifications by clicking the 3 arrows marked with green in the image below)?

[2] The terminal (UART Debug tool) should print the data sent from the phone, you can test it out by enter in a message by clicking the arrow up in the nRF Connect app beside RX Characteristic (marked with red in image below).

“if enter uart_event_handle() , this function ble_nus_data_send() is send data to mobile phone ?”: Yes, you are right. When entering uart_event_handle(), the data received over UART will be sent over BLE to the phone through the ble_nus_data_send() function.

[3] No, you only need to enable notifications (in addition to connecting to the device). Then you should be able to send messages from the nRF52 chip to the phone

Cheers, Simon

RE: about uart interrupt callback and mobile phone receive data in nRF52810

tony55723 — Wed, 08 Aug 2018 01:01:03 GMT

Thank you for answer , but I have some questions.

【1】Board power on , UART Debug tool can print 【UART Started】 , but send data , inability to enter uart_event_handle() (callback) , is enable need to open, or other settings?

【2】UART Debug tool can print the data from the phone , if enter uart_event_handle() , this function ble_nus_data_send() is send data to mobile phone ?

【3】Want to receive data from nRF52810 , mobile phone only needs to open the notify , other things should not be done?

RE: about uart interrupt callback and mobile phone receive data in nRF52810

howard n2wx — Tue, 07 Aug 2018 21:18:13 GMT

Hi Tony,

[1] See uart_event_handle() in that example's main.c for the UART receiver. It's called with an APP_UAR_DATA_READY event when the UART receives data.

[2] nus_data_handler handles data going in the opposite direction, from the mobile phone ----> BLE ---> nRF52810

[3] How to do this depends on the app. The nRF Connect Android app allows you to connect and turn notifications on. Your own Android app will need to do something like this:

       // If nordic nus device
        if (UUID_NRF_UART_SERVICE.equals(characteristic.getUuid())) {
            BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
                    UUID.fromString(CLIENT_CHARACTERISTIC_CONFIG));
            descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
            mBluetoothGatt.writeDescriptor(descriptor);
        }

in BluetoothLeService.java's setChaacteristicNotification function

Best Regards, Howard