/*!
\file readme.txt
\brief description of serial SPI interface and regular conversion
\version 2021-10-30, V1.0.0, firmware for GD32W51x
*/
/*
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*/
This demo is based on the GD32W515P-EVAL-V1.0 board, it shows the HPDF sample stream data
by serial SPI interface. In this demo, configure channel1 is serial channel to recieve the
data stream. The SPI0 is used as sigma-delta modulator to transmit stream data and provide
external clock.The CKIN0 pin is connect PC0, the DATA0 pin is connect PC3.
This demo shows process of the HPDF recieve and smooth the SPI serial data stream. If the
HPDF output data is exceed the threshold monitor high/low threshold or malfunction monitor
counter, the error information will be print. If the HPDF output data is not exceed the
threshold, the HPDF output data will be print by COM0.
Connect SPI0 SCK PIN(PA5) to HPDF CKIN0 PIN(PC0).
Connect SPI0 MOSI PIN(PA7) to HPDF DATAIN0 PIN(PC3).
