Add link to HDLBits tutorial

pwmarcz · pwmarcz · commit 616fdb0dfee8 · 2018-11-17T17:34:21.000+01:00
diff --git a/verilog/README.md b/verilog/README.md
@@ -141,3 +141,4 @@ You can use the provided `traffic.v` and `traffic_tb.v`.
 ## Links
 
 - [Verilog cheatsheet](https://www.cl.cam.ac.uk/teaching/0910/ECAD+Arch/files/verilogcheatsheet.pdf) (PDF)
+- [HDLBits](https://hdlbits.01xz.net/wiki/Problem_sets) - online, interactive Verilog exercises

Original file line number	Diff line number	Diff line change
@@ -141,3 +141,4 @@ You can use the provided `traffic.v` and `traffic_tb.v`.
`141`	`141`	`## Links`
`142`	`142`
`143`	`143`	`- [Verilog cheatsheet](https://www.cl.cam.ac.uk/teaching/0910/ECAD+Arch/files/verilogcheatsheet.pdf) (PDF)`
	`144`	`+- [HDLBits](https://hdlbits.01xz.net/wiki/Problem_sets) - online, interactive Verilog exercises`