Re: Setting MPC555 SCI for 7 Bits 2 Stop Bits and Odd parity

I just finished reading the manual for what i needed the sci to 
function as.  Its not exactly what you need but may help you get on 
the right track.

pg 513 has a table you might need to look at. though


heres how i setup the control registers:

open up hypertrm
Easy Settings: 9600, 8 data bits, no parity, 1 start and stop bit, 
flow control none.


void setup_qsmcm() 
{
	QSMCM.QSMCR.B.STOP = 0;
	
		// do I ignore the IMB3 freeze signal?
	if(DEPLOYMENT_MODE == debug)
		QSMCM.QSMCR.B.FRZ1 = 1; // yes
	else		
		QSMCM.QSMCR.B.FRZ1 = 0; // no
		

	QSMCM.QSMCR.B.SUPV = 0;
		//keep registers access as global not restricted


	//Setup Interrupt Pins
	QSMCM.QDSCI_IL.B.ILDSCI = 5; 				// 
define SCIIRQ at level 5
	QSMCM.SCC1R1.B.TIE = 0;					
	// disable transmit interrupt;
	QSMCM.SCC1R1.B.TCIE = 0;				
	// disable transmit complete interrupt;
	QSMCM.SCC1R1.B.RIE = 1;					
	// enable receiver interrupt;
	QSMCM.SCC1R1.B.ILIE = 0;				
	// disable idle-line interrupt;


	
	//Before changing register values, allow the SCI to complete 
the current transfer, 
	//then disable the receiver and transmitter.


	QSMCM.SCC1R0.B.SC1BR = 0b0000010000010; 	// Set 9600 
Baud 40000000/32/9600;
	
	//SCI Control Register
	QSMCM.SCC1R1.B.LOOPS = 0;
	QSMCM.SCC1R1.B.WOMS = 0;				
	// normal CMOS output [only when configured as output txd]
	QSMCM.SCC1R1.B.ILT = 0; 				
	// idle-line; 0=short; 1=long
	QSMCM.SCC1R1.B.PT = 0;					
	// 0 = even; 1 = odd
	QSMCM.SCC1R1.B.PE = 0;					
	// parity disabled
	QSMCM.SCC1R1.B.M = 0;					
	// mode select: 0 = 10 bit mode; 1 = 11 bit mode
	QSMCM.SCC1R1.B.WAKE = 0;				
	// wakup by address mark; 0 = idle line detection; 1 = 
address mark (last bit set)
	QSMCM.SCC1R1.B.RWU = 0;					
	// normal receiver operation (received data recognized); 1 = 
wakeup mode enabled (ignore data until awakened)
	QSMCM.SCC1R1.B.SBK = 0;					
	// send break 0=normal; 1 = break frame(s)	

	QSMCM.SC1DR.R = 0x00;					
	// intialize first char to transmit, aka, null

	QSMCM.SCC1R1.B.TE = 1; 					
	// Enable Transmitter
	QSMCM.SCC1R1.B.RE = 1; 					
	// Enable Reciever
	

	
	QSMCM.SCC2R0.B.SC2BR = 0;				
	// disable baud rate generator for sci2
	QSMCM.SCC2R1.B.LOOPS = 0;
	QSMCM.SCC2R1.B.WOMS = 0;
	QSMCM.SCC2R1.B.ILT = 0;
	QSMCM.SCC2R1.B.PT = 0;
	QSMCM.SCC2R1.B.PE = 0;
	QSMCM.SCC2R1.B.M = 0;
	QSMCM.SCC2R1.B.WAKE = 0;
	QSMCM.SCC2R1.B.TIE = 0;
	QSMCM.SCC2R1.B.TCIE = 0;
	QSMCM.SCC2R1.B.RIE = 0;
	QSMCM.SCC2R1.B.ILIE = 0;
	QSMCM.SCC2R1.B.RWU = 0;
	QSMCM.SCC2R1.B.SBK = 0;
	QSMCM.SCC2R1.B.TE = 0;
	QSMCM.SCC2R1.B.RE = 0;
}




//using status registers for transmit and receive
void send_char(char c)
{
	INTERRUPTS_DISABLE

	// while(QSMCM.SC1SR.B.TDRE != 1 && QSMCM.SC1SR.B.TC != 1);
		

	while(QSMCM.SC1SR.B.TDRE != 1);
			// wait till data in data register has been 
moved to serial shifter 
			// (TDRE = transmit data register empty = 
read only) 


	QSMCM.SC1DR.R = c; // Move/Write Data to Transmit Register


	while(QSMCM.SC1SR.B.TC != 1);
			// data transfer of char is complete 
			// (TC = transfer complete).



	INTERRUPTS_ENABLE 
}




my send function works when its flashed.. although i get a weird 1 
char added on first use of my send_char

http://people.tamu.edu/~leblanc/forums/sci/sci_transmit_problem_initia
l_char.jpg