AW: The MCF52235 issue

Sanjay
 
I think that you are setting the PDDPAR register up incorrectly. If you
want GPIO functionality you need to write ‘0’ to the port bit. Writing a
‘1’ as you are doing will activate the PST function.
 
See all the following:
http://forums.freescale.com/freescale/board/message?board.id=CFCOMM
<http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&mes
sage.id=3197&query.id=1078333#M3197>
&message.id=3197&query.id=1078333#M3197
 
In fact as long as you have no debugger connected it should default to
GPIO.
 
Regards
 
Mark
 
 
Mark Butcher Bsc (Hons) MPhil MIEE
 
M.J.Butcher Consulting                
Obere Bahnhofstr. 13,  CH-5507 Mellingen,
Switzerland          <http://www.mjbc.ch/> www.mjbc.ch /
<http://www.utasker.com/> www.uTasker.com
056 491 48 10 / 079 402 26 37 / Skype: M_J_Butcher
 <http://www.uTasker.com>  
 
 
-----Ursprüngliche Nachricht-----
Von: [email protected] [mailto:[email protected]]
Im Auftrag von Sanjay Morab
Gesendet: Donnerstag, 13. März 2008 09:56
An: [email protected]
Cc: [email protected]
Betreff: [ColdFire] The MCF52235 issue
 
Dear MARK
 
I am using The PST0-4 and DDATA0-4 (USED BY BDM) for driving the
external shift register. After downloading the to the flash and
disabling the JTAG connection still it shows some frequency on PST0 and
PST1 instead of the pulses of Shift register. I had checked the shift
register working on other  port pin it works fine. Below is the
initialization used for shift register (GPIO).
 
 
void InitReadLedContrl(void)
{
                        MCF_GPIO_PDDPAR = MCF_GPIO_PDDPAR
                                    |  MCF_GPIO_PDDPAR_PDD0_GPIO //Led
Data
                                    |  MCF_GPIO_PDDPAR_PDD1_GPIO; // Led
Clock
                                    
                                    
                        MCF_GPIO_DDRDD =   MCF_GPIO_DDRDD
                                | MCF_GPIO_DDRDD_DDRDD0
// LedData PST0
                         | MCF_GPIO_DDRDD_DDRDD1;
// LeaClock PST1
                        
                                    
                                    
                        MCF_GPIO_PTDPAR = MCF_GPIO_PTDPAR
                        | MCF_GPIO_PTDPAR_PWM5_GPIO                 //
OE1
                        | MCF_GPIO_PTDPAR_PWM7_GPIO ;   // OE2
    
        
                        MCF_GPIO_DDRTD = MCF_GPIO_DDRTD
                        | MCF_GPIO_DDRTD_DDRTD3
// Oe2
                        | MCF_GPIO_DDRTD_DDRTD2;
// Oe1
        
                        
                        MCF_GPIO_PASPAR = MCF_GPIO_PASPAR
                                    | MCF_GPIO_PASPAR_SYNCA_GPIO    //
Strobe 1
                                    | MCF_GPIO_PASPAR_SYNCB_GPIO;   //
Strobe 2
                                    
                        MCF_GPIO_DDRAS = MCF_GPIO_DDRAS
                                    | MCF_GPIO_DDRAS_DDRAS2
// Strobe 2
                                    | MCF_GPIO_DDRAS_DDRAS3;
// Strobe 1
                            
                                    // All Outputs off
                                    
                                    MCF_GPIO_PORTDD |= 0x3;
// Led clk/dta
                                    MCF_GPIO_PORTTD |= 0x0c;
//  OE
                                    MCF_GPIO_PORTAS |= 0x0c;
// Strobe
//                                  ReaderLedStatus = 0;
                        
}
 
Is there any thing else to be done for disabling the PST0
 
Regards
Sanjay Morab
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