ColdFire/68K Microcontrollers and ProcessorsのトピックRe: 5282 Ports

5282 Ports

Lucho — Wed, 25 Apr 2007 03:24:25 GMT

All of the ports that I like to used like IN PUT port I can't use them like IN PUT as PORTB, PORTC, PORTD and this registers are of 8 bits

#define MCF5282_GPIO_PBCDPAR (*(vuint8 *)(void *)(&__IPSBAR[0x100050]))

and using the similar instrution of program:

int main()
{
MCF5282_GPIO_PBCDPAR = 0x00

MCF5282_GPIO_DDRB = 0xFF; //OUT PUT PORT

MCF5282_GPIO_DDRC = 0X00; //IN PUT PORT

   while(1)
    {
        MCF5282_GPIO_PORTB =    MCF5282_GPIO_PORTC;

}

return 0;
}

With the last program I can do that the PORTB oun the data that the PORTC recive, I don't know if the declaration of the register are in a wrong way or what if some body have an example of program that declarete a IN PUT port I will be thanksful

Re: 5282 Ports

Pai — Wed, 25 Apr 2007 12:10:48 GMT

Hi, How do you use this micro-controller: in master mode or single chip mode? in master mode ports A,B,C D have dedicated function (address bus, data bus) so it is quite normally to behave different than you like. Regards, Pai

Re: 5282 Ports

Tang — Wed, 25 Apr 2007 13:31:36 GMT

Hello,
You can see below in MCF5282UM:

Reading a PORTn register returns the current values in the register, not the port n pin values.
And reading a PORTnP/SETn register returns the current state of the port n pins.