41 #define setupSWOForPrint RETARGET_SwoInit 
int RETARGET_ReadChar(void)
Receive a byte from USART/LEUART and put into global buffer. 
 
int RETARGET_WriteChar(char c)
Transmit single byte to USART/LEUART. 
 
void RETARGET_SwoInit(void)
Setup SWO for output.