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一、 单文本（TXT格式）的读取范例:读取如下txt文件数据并进行图形显示：注意：头三行为注释，共5列数据，每列针对一个VGS，每列的每个数据对应不同的VDS。VGS从0.9V变化到3.3V，步进为600mV，共5个点；VDS从0，变化到15.3V，步进为150mV，共103个点。显然，如上有两个扫描变量。一个是VDS是主变量，一个是VGS是次变量。于是，在ICCAP中设置步骤如下：1、 新建一个DUT。2、 在Measure/Simulate中，设置Input，如上分析有两个变量，设置如下图，这步设置是为了程序编程和POLT显示做准备的。 VD的Sweep Order设为1，即主参数；VG的Sweep Order设为2，即次参数。3、 程序编写：先新建一个程序文件，如图：点击右边的Browse，会跳出如图的对话框，选PEL-Program即可。确定则为如下：Execute是程序的执行按钮，而View则可看程序返回值。代码如下：UPDATE_EXPLICIT! this PEL program reads data from a mdif formatted file! with the columnsLINPUT enter path of file you want,mdiffile,mdiffileLINPUT enter headline,head_line,head_linepath2setup=/read_mdif/mdif_3/readsweep1 = USERC_num_of_points(1,path2setup)sweep2 = USERC_num_of_points(2,path2setup)!This is to define the correct data size for this Setup, !for later copy2paste Therefore, update the data sizeICCAP_FUNC(VD,Redisplay)COMPLEX tmp_idssweep1 * sweep2r_stream = USERC_open(VAL$(mdiffile),r)!skip the header linesi=0WHILE i head_line! replace by the number of lines to skip dummy = USERC_readstr(r_stream,0,%*n%*1n,string) i = i + 1END WHILEICCAP_FUNC(/,Status Window) ! brings status window to top leveli = 0WHILE i sweep1 k = 0 WHILE k sweep2 tmp_idssweep1*k+i = USERC_readnum(r_stream, 0, %lf) PRINT reading line ;sweep1*k+i;, i.e. ids = ;tmp_idssweep1*k+i k = k + 1 END WHILE i = i + 1END WHILEdummy = USERC_close(r_stream)!avoid unnecessary data behind this transformRETURN tmp_ids语句说明：1 LINPUT enter path of file you want,mdiffile,mdiffile此语句是跳出对话框，要求需要加载数据的文件路径，把输入的路径值赋给mdiffile，而前一个mdiffile会记录这个路径，把它变为默认值，下次输入则不再需要重新输入路径了。2 path2setup=/read_mdif/mdif_3/read此语句是把工程路径赋给path2setup，为了便于后面sweep1，sweep2的取值。这个路径来源于上图的标题栏红线标注的值。3 sweep1 = USERC_num_of_points(1,path2setup)此语句将工程的Sweep Order为1的Input 的步长赋给sweep1，这里也就是VD。4 r_stream = USERC_open(VAL$(mdiffile),r)此语句是打开mdiffile所指文件，并将文件的id赋给r_stream，以代表这一文件。这里的r，是指用只读方式打开，下面的例子还会设计到以写的方式打开。5 WHILE i head_line! replace by the number of lines to skip dummy = USERC_readstr(r_stream,0,%*n%*1n,string) i = i + 1END WHILE此语句是读文本中的注释信息。6 WHILE i sweep1 k = 0 WHILE k sweep2 tmp_idssweep1*k+i = USERC_readnum(r_stream, 0, %lf) PRINT reading line ;sweep1*k+i;, i.e. ids = ;tmp_idssweep1*k+i k = k + 1 END WHILE i = i + 1END WHILE此语句用于数据的读取，是整个程序的核心。7 tmp_idssweep1*k+i = USERC_readnum(r_stream, 0, %lf)此语句用于数据的读取，遇到空格，本数据读取结束；遇到回车，本数据读取结束并换行。8 dummy = USERC_readstr(r_stream,0,%*n%*1n,string)此语句用于读取字符串，注意string必须要在Setup Variables中定义。9 RETURN tmp_ids此语句是返回tmp_ids的值。4、 Setup Variables设置设置如下：5、 PLOT设置点击Display Plot，显示图形如下：注：对于单文本s2p格式的读取，如上，代码不变。二、 多文本（S2P格式）的读取范例：读取如下文件的多个文件数据：步骤如下：1、 使用文件转换软件，将文件路径转换为文本格式：(在同文件夹中)输入要转换的文件路径。转换后如下：可以在C:下生成switchdialog_result.txt，记录了文件的路径。2、 在ICCAP中设置简略如下： 代码如下：UPDATE_EXPLICIT! this PEL program reads data from a mdif formatted file! with the columns! freq REAL(S11) IMAG(S11) REAL(S21) IMAG(S21) REAL(S12) IMAG(S12) REAL(S22) IMAG(S22)LINPUT enter path of txt recording path,mdiffile,mdiffileLINPUT enter head lines,head_line,head_line!This is to define the correct data size for this Setup, !for later copy2paste Therefore, update the data sizeICCAP_FUNC(freq,Redisplay)COMPLEX tmp_r.22sweep1COMPLEX tmp_i.22sweep1COMPLEX tmp_a.22sweep2*sweep1path2setup=/read_mdif/mdif_1/readsweep1 = USERC_num_of_points(1,path2setup)sweep2 = USERC_num_of_points(2,path2setup)r_stream1 = USERC_open(VAL$(mdiffile),r)!PRINT r_stream1 = ; r_stream1!skip the 7 header linescout_f = 0WHILE cout_f sweep2PRINT r_stream1 = ; r_stream1dummy = USERC_readstr(r_stream1, 0, %s, string)PRINT dummy = ; dummyPRINT string = ; stringr_stream = USERC_open(VAL$(string),r)PRINT r_stream =; r_streami=0WHILE i head_line! replace 7 by the number of lines to skip dummy = USERC_readstr(r_stream,0,%*n%*1n,string) i = i + 1END WHILEICCAP_FUNC(/,Status Window) ! brings status window to top leveli=0WHILE i sweep1 tmp = USERC_readnum(r_stream, 0, %lf) PRINT reading line ;i;, i.e. freq = ;tmp tmp_r.11i = USERC_readnum(r_stream, 0, %lf) tmp_i.11i = USERC_readnum(r_stream, 0, %lf) tmp_r.12i = USERC_readnum(r_stream, 0, %lf) tmp_i.12i = USERC_readnum(r_stream, 0, %lf) tmp_r.21i = USERC_readnum(r_stream, 0, %lf) tmp_i.21i = USERC_readnum(r_stream, 0, %lf) tmp_r.22i = USERC_readnum(r_stream, 0, %lf) tmp_i.22i = USERC_readnum(r_stream, 0, %lf*n%*1n) !Note: if you also want to read DC biases etc., ! simply define another data field with a COMPLEX ! statement, and apply more USERC_readnums here. i = i + 1END WHILEd = 0WHILE d sweep1 tmp_a.11cout_f*sweep1+d = tmp_r.11d +j*tmp_i.11d tmp_a.12cout_f*sweep1+d = tmp_r.12d +j*tmp_i.12d tmp_a.21cout_f*sweep1+d = tmp_r.21d +j*tmp_i.21d tmp_a.22cout_f*sweep1+d = tmp_r.22d +j*tmp_i.22d d =d + 1END WHILE dummy = USERC_close(r_stream) cout_f = cout_f + 1END WHILEdummy = USERC_close(r_stream1)!avoid unnecessary data behind this transformRETURN tmp_a显示如下：三、 单文本（TXT格式）的导出其他类同，代码如下：UPDATE_EXPLICIT! this PEL program reads data from a mdif formatted file! with the columns! freq REAL(S11) IMAG(S11) REAL(S21) IMAG(S21) REAL(S12) IMAG(S12) REAL(S22) IMAG(S22)mdiffile = c:export.txt!This is to define the correct data size for this Setup, !for later copy2paste Therefore, update the data sizeICCAP_FUNC(freq,Redisplay)COMPLEX tmp_vgsnr_ptsCOMPLEX tmp_idsnr_ptsVTO = 1r_stream = USERC_open(VAL$(mdiffile),w)!PRINT r_stream = ; r_stream!skip the 7 header linesi = 0!testWHILE i nr_pts tmp_vgsi = i tmp_idsi = nr_pts*i i = i +1 END WHILE!end testi = 0WHILE i nr_pts write_result = USERC_write(r_stream,0,vgs=&VAL$(tmp_vgsi) write_result = USERC_write(r_stream,0, ) write_result = USERC_write(r_stream,0,ids=&VAL$(tmp_idsi) write_result = USERC_write(r_stream,0,rn) i = i + 1END WHILEdummy = USERC_close(r_stream)!avoid unnecessary data behind this transformRETURN tmp_vgs
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