espruino 74hc595 pin corresponding problem?

Well, you have 2 options:

• Use hardware SPI (in which case you must use specific pins - like B3 and B5)
  
• Use software SPI (in which case you can use any pins you want to)
  
  

For software, the code looks like I pasted above. For hardware, it looks like this:

SPI3.setup({mosi: B5, sck: B3 });
SPI3.write(my_data, MY_ST_CP_PIN);