Projects in CE220818 are designed for both cores. If you want to download the generated .hex file to PSoC 6, it is fine to choose either cm0+ or cm4, because both cm0+ and cm4 would be programmed with respective part essentially.
Hex file under the cm4 folder of PSoC 6 project covers both cm0+ and cm4;
Hex file under the cm0+ folder of PSoC 6 project covers only cm0+.
Hope I got what you mean.
what does "hex file" mean?
When I checked the program through Uart by printing char, I found that different message planned to be printed from two core was printed through one port. Should not two message be printed through two port? And why my computer recognized two port like this,but only one port could receive result(I have downloaded the same program to two cores)?