UART communication between Cypress FM4 (Cortex M4) and Arduino
Found the problem thanks to ThreePhaseEel. The schematic document (p6) shows that a connector CN9 has Pin109 and Pin110, while for wiring I looked into Starter Kit Guide (p8), which shows Pin106 and Pin107. So, basically I have to use another UART channel, in this case - ch.12. Changes I made:


  SetPinFunc_SIN12_0(); 
  
  SetPinFunc_SOT12_0(); 
  
  UartCh2 = &amp;UART12
  
  #define PDL_PERIPHERAL_ENABLE_MFS2              PDL_ON