ngspice笔记

linux 编译 ngspice

下载code:
    https://sourceforge.net/projects/ngspice/

mkdir release && cd release
../configure  --with-x --with-readline=yes --disable-debug

源码编译

sudo apt install bison flex automake libtool libxaw7-dev libreadline-dev

git clone https://git.code.sf.net/p/ngspice/ngspice

cd ngspice

./autogen.sh

mkdir -p debug && cd debug

../configure --with-ngshared --enable-cider --enable-xspice  --with-x --enable-stepdebug --enable-cpdebug

make -j4
sudo make install

cd ..
ngspice
source examples/soi/inv_tr.sp


如果发生错误: Undefined symbol error 'hcomp' when using libngspice.so
可能是这有的操作:
    Clean folder -> normal build -> shared lib build -> problem occurs.
请考虑, 应该可以解决:
    Clean folder -> shared lib build -> OK.

源码分析

var_alloc(char *name, struct variable *next)

void cp_vset(char *varname, enum cp_types type, void *value);

    设置一个参数列表: struct variable *variables; varname是不重复的


ngSpice_Init():

    cp_vset("rndseed", CP_NUM, 1);

    cp_vset("sharedmode", CP_BOOL, True);

    ft_cpinit(): Set some standard variables and aliases, etc, and init the ccom stuff
        cp_init(); Initialize io, cp_chars[], variable "history" in init.c
        cp_coms: 即所有的命令, 比如: print, plot, load, tran, op


ngSpice_Circ(netlist) 根据网表创建电路
    create_circbyline()
        更新circarray
        更新完后执行inp_spsource():




struct CKTcircuit: 电路结构体

struct circ