When using the developed configuration utility, a majority of chip pins can be configured as analogue input, digital input/output, PWM output or one of the SPI lines. The input/output peripheral of the presented device is not static but rather flexible, and could be easily configured to customised needs without changing the firmware. This USB class is natively supported by most of the operating systems and therefore any installation of additional USB drivers is unnecessary. This device has been developed as a USB human interface device (HID). The presented embedded DAQ device contains a preloaded program (firmware) that enables easy acquisition and generation of analogue and digital signals and data transfer between the device and the application running on a PC via USB bus. The key component of the presented solution is a configurable microcontroller-based device with an integrated USB transceiver and a 12-bit analogue-to-digital converter (ADC). This paper presents a low-cost microcontroller-based data acquisition device.
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