Detail example – mplab xpress

PIC18FxxQ10 family has the capability to store 1 byte data at a time to program memory without erasing it. So, no need to erase 64 Bytes in a sector to store 1 byte of data. This feature is not there in any other PIC18F devices. A write to program memory can be executed by sectors or single words. A read from program memory is executed one byte at a time.

The ADCC module of PIC18F25Q10 MCU periodically acquires the UV/Ambient sensor data and process it to equivalent digital data. The ADCC has auto conversion trigger option. In this example Timer 1 is used as a source for the ADC conversion trigger.

The interval for the timer can be selected from android app; currently the available options for the interval are 1, 2, 4, 8 or 16 seconds.

Out of various computation features of the ADCC such as Averaging and low-pass filter functions, reference comparison, 2-level threshold comparison and selectable interrupts the ADCC is used in the burst average mode in this example. The averaging of 32 samples is done by the computation hardware in the ADCC and the result is available in ADFLT register. The processed data will be transmitted to a mobile over BLE communication and displayed on the android mobile app.

• The GUI consists of a “Search” button, the user presses that to scan all nearby BLE devices. Once the search operation is done, it lists the device. The user should select one of the BLE devices from the list, and press the “Connect” button to pair with the device. Once connected to the device the connect button will appear as “Disconnect”.

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