1602 display driver, I have tested successfully in my own test board, you need slightly modified according to your own test board

LCD1602\LCD1602\device_usage_statistics.html
.......\.......\lcd1602.bgn
.......\.......\lcd1602.bit
.......\.......\LCD1602.bld
.......\.......\LCD1602.cmd_log
.......\.......\lcd1602.drc
.......\.......\LCD1602.ipf
.......\.......\LCD1602.ipf_ISE_Backup
.......\.......\LCD1602.ise
.......\.......\LCD1602.ise_ISE_Backup
.......\.......\LCD1602.lfp
.......\.......\LCD1602.lso
.......\.......\lcd1602.msd
.......\.......\lcd1602.msk
.......\.......\LCD1602.ncd
.......\.......\LCD1602.ngc
.......\.......\LCD1602.ngd
.......\.......\LCD1602.ngr
.......\.......\LCD1602.ntrc_log
.......\.......\LCD1602.pad
.......\.......\LCD1602.par
.......\.......\LCD1602.pcf
.......\.......\LCD1602.prj
.......\.......\lcd1602.rbb
.......\.......\lcd1602.rbd
.......\.......\LCD1602.stx
.......\.......\LCD1602.syr
.......\.......\lcd1602.twr
.......\.......\lcd1602.twx
.......\.......\LCD1602.ucf
.......\.......\LCD1602.unroutes
.......\.......\LCD1602.ut
.......\.......\LCD1602.vhd
.......\.......\LCD1602.xpi
.......\.......\LCD1602.xst
.......\.......\LCD1602_guide.ncd
.......\.......\LCD1602_map.map
.......\.......\LCD1602_map.mrp
.......\.......\LCD1602_map.ncd
.......\.......\LCD1602_map.ngm
.......\.......\LCD1602_pad.csv
.......\.......\LCD1602_pad.txt
.......\.......\LCD1602_prev_built.ngd
.......\.......\LCD1602_summary.html
.......\.......\LCD1602_summary.xml
.......\.......\LCD1602_usage.xml
.......\.......\LCD1602_vhdl.prj
.......\.......\pepExtractor.prj
.......\.......\xst\dump.xst\LCD1602.prj\ntrc.scr
.......\.......\...\work\hdllib.ref
.......\.......\...\....\hdpdeps.ref
.......\.......\...\....\sub00\vhpl00.vho
.......\.......\...\....\.....\vhpl01.vho
.......\.......\_impact.cmd
.......\.......\_impact.log
.......\.......\.ngo\netlist.lst
.......\.......\_pace.ucf
.......\.......\.xmsgs\bitgen.xmsgs
.......\.......\......\map.xmsgs
.......\.......\......\ngdbuild.xmsgs
.......\.......\......\par.xmsgs
.......\.......\......\trce.xmsgs
.......\.......\......\xst.xmsgs
.......\.......\xst\dump.xst\LCD1602.prj\ngx\notopt
.......\.......\...\........\...........\...\opt
.......\.......\...\........\...........\ngx
.......\.......\...\........\LCD1602.prj
.......\.......\...\work\sub00
.......\.......\...\dump.xst
.......\.......\...\projnav.tmp
.......\.......\...\work
.......\.......\xst
.......\.......\_ngo
.......\.......\_xmsgs
.......\LCD1602
LCD1602

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