• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 79 subscribers
  • Views 405 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSP430FR6972: MSP430FR6972

luigi Quaglia
Expert 1155 points

Part Number: MSP430FR6972

Tool/software:

Hi 

I'm using MSP430FR6972, I want to using the SPI , Uart and I2C, afer the register configuration 

example :

SPI2_UCA0

                       bis.w        #UCSWRST,UCA0CTLW0 ;
                       mov.w       #(UCSWRST+UCMSB+UCMST+UCSYNC+UCSSEL1+UCSSEL0),UCA0CTLW0 
                       mov.w      #16,UCA0BRW ;* CLOCK DIVISO 2 VA A 500kHz SMCLK èè a 8mHz */
                       bic.b         #(BIT4+BIT3),P4SEL0 ;* disable uart  Port 4
                       bic.b         #(BIT0+BIT1+BIT2),P2SEL1  
                      bis.b           #(BIT0+BIT1+BIT2),P2SEL0 ;* enable SPI Port 2 

                      bic.w           UCSWRST,UCA0CTLW0

SPI2_UCB1

                         bis.w   #UCSWRST,UCB1CTLW0 
                         mov.w #(UCSWRST+UCMSB+UCMST+UCSYNC+UCSSEL1+UCSSEL0),UCB1CTLW0 
                        mov.w  #16,UCB1BRW
                        bic.b    #(BIT1+BIT2),P3SEL0 ;* disable  I2C on Port 3 
                        bclr.b   #(BIT5+BIT6+BIT7),P4SEL0 ; 
                        bclr_b  #(BIT5+BIT6+BIT7),P4SEL1 ;* enable spi  port 4 
                        bclr.w  #UCSWRST,UCB1CTLW0 

 I have problem with SPI_UCA0, do not have any signal on the output pin whne is set like SPI

if I'm using this port like I/O pin work properly 

, the SPI_UCB1 work properly without any problem, 

for the SPI_UCA0 there is some bit in the hide Register to enable the SPI ? I have try to check every where 

but did't find anythings 

Luigi 

have problem only with port 2, there is some special bit on sonme hide register ? 

  • 0
    TI__Guru 71216 points

    Hi Luigi,

    Seems odd. You have the following for UCB1, which clearing bits 5,6,7 in both P4SEL0 and P4SEL1, puts these pins into GPIO mode, not SPI.

    bclr.b   #(BIT5+BIT6+BIT7),P4SEL0 ; 
    bclr_b  #(BIT5+BIT6+BIT7),P4SEL1 ;

    Likewise, you do set bits 5,6,7 in P2EL0 and clear same bits in P2SEL1, which is correct for enabling the pins for SPI instead of GPIO.

    bic.b         #(BIT0+BIT1+BIT2),P2SEL1  
    bis.b           #(BIT0+BIT1+BIT2),P2SEL0 ;* enable SPI Port 2

    So are you sure you are having trouble with UCA0 and not UCB1?

  • 0 in reply to Dennis Lehman
    Expert 1155 points

    Hi Dennis 

    sorry I wrote bad about UCB1 because I Using macro and have translate bad 

                          bis.w   #UCSWRST,UCB1CTLW0 
                             mov.w #(UCSWRST+UCMSB+UCMST+UCSYNC+UCSSEL1+UCSSEL0),UCB1CTLW0 
                            mov.w  #16,UCB1BRW
                            bic.b    #(BIT1+BIT2),P3SEL0 ;* disable  I2C on Port 3 
                            bic.b   #(BIT5+BIT6+BIT7),P4SEL0 ; 
                            bis.b  #(BIT5+BIT6+BIT7),P4SEL1 ;* enable spi  port 4 
                            bclr.w  #UCSWRST,UCB1CTLW0 

    this port UCB1 work well 

    I have found the problem, have using the Old routine and I didn't think of replacing the register of previous application with this new application, 

    the old routine used the UCB1 registers and not UCA0, now is ok  

    sorry for Mistake 

    Luigi 

    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    

	            
                	
	
    
				
		                
                
                
                
                
                
                
        		
		
				
    
			
		
    
		
		 
		
		
     
    
	
    

    
			
    
			
    
		
    

		
    
	
    • 

    



		
	


			





















        
        
            



	

		
**Attention**  This is a public forum