有限冲击响应数字滤波器的基础理论。 FIR数字滤波器是一种非递归系统，其冲激响应h(n)是有限长序列,其差分方程表达式为： N为FIR滤波器的阶数。-Finite impulse response digital filter of the basic theory. FIR digital filter is a non-recursive system, its impulse response h (n) is a finite sequence, the differen

本代码是PID在S函数中的实现，但不同之处在于，本代码先把PID变成状态空间表达式，更加易懂，为本人独创。-This code is the PID in the S function, but the difference is that, this code to put the PID into the state space expressions, more understandable, for my original.

DSP F2812 SPWM调制程序,规则采样法SPWM的输出,计算占空比表达式(DSP F2812 SPWM modulation procedures, regular sampling method, SPWM output, computing the duty cycle expression)