QDEC Sample #

Overview #

QDEC, short for Quantization Decoder, is a tool used to decode quantized data. It is commonly used in embedded systems to decode quantized data for implementing specific functionalities on microcontrollers.

This routine demonstrates the counting function of a rotary encoder using qdec. It can count based on the events and direction of the rotary encoder (increasing the count for a forward rotation and decreasing the count for a reverse rotation).

The LOG is printed through the UART port, showing the count changes based on the events and direction of the rotary encoder.

Hardware Requirements #

Building #

To build the sample with keil, follow the steps listed on the quick start page in the IN6xxE of Inplay Doc. You may be able to solve questions on that webpage.

Debug #

The LOG is printed through the UART port, showing the count changes based on the events and direction of the rotary encoder.

More information may be found in debug guide page.

Connection #

Connect the VCC and GND of IN6xxE to the qdec board. Then, connect GPIO_1_3 to cha-x-0, GPIO_1_6 to chb-x-0, and GPIO_2_3 to idx-x-0.

Test Steps #

1. Open Keil and download the proj_drv_qdec project.
2. Press the K1 button and observe the text main start... appearing in the log.
3. Rotate the rotary encoder in the forward direction. The count will increase, and the text cnt is 0x... will be displayed.

Note: Connecting GP13 to chb_x_0 and GP16 to cha_x_0 will not affect the program’s operation but will change the direction determination during the rotary encoder rotation.