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DSPF_sp_iir()这个函数是只能用于低通滤波器吗，如果想用于带通滤波器需要对这个封装好的函数进行什么改进？
抱歉，我们没有c6748带通滤波器的例程。可以参考下面两篇文档是否有帮助。https://www.ti.com/lit/an/spra884a/spra884a.pdfhttps://www.ti.com/lit/an/spra947a/spra947a.pdf
