Dear Friend
I want to use GPIO pins as a input in TNS320C6713 dsk. I have followed all instructions to use this J1 port(GPIO). First i have enabled GPIO port ( switch-4 is on in sw3 DIP). Using GPIO-(8-11) 4 pins, enable GPEN registers. I have sent four parallel binary inputs repeatedly (x0F, x0E, x0A, x0B) through GP(8-11) (pins 19, 21,22,23) and get the corresponding value through GPVAL registers simultaneously . But the obtain value are like is (see below)...
Normal 0 false false false EN-US X-NONE BN MicrosoftInternetExplorer4
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output: 3584, 2560, 2816, 3840, 3840, 3584, 2560, 3840, 3584, 2560, 2816, 3840, 3584, 2560, 2816, 3840, 3584, 2560, 2816, 3840, 3840, 3584, 2560, 2816,.... etc
My Program Code
main()
{
int t=0,b=1;
int *gpio_enable,*gpio_dir,*gpio_val;
gpio_enable = (int*)0x01B00000;
gpio_dir = (int*)0x01B00004;
gpio_val = (int*)0x01B00008;
*gpio_enable = 0x00000F00;
*gpio_dir = 0x00000000;
t=0;
while(1)
{
for(t=0;t<16;t++)
{
input[t]=*gpio_val;
delay();
}
for(t=0;t<16;t++)
printf("%d, ",input[t]);
}
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My question is that above this input value , how can i get the actual input value (equivalent to x0F, x0E, x0A, x0B ).
When i sent one individual value 1 & 0 through GP8(19 pin), then show the value 3840 as for high input( ' 1' ) and 3584 as for low input ( '0' ).
I have tried a lots to understand this logic, but fail.
Kindly give me any consult or suggestion if any body have a idea.
If you have any other way to use GPIO pins as a input , kindly inform me.
Your kind help will be highly appreciated.
Regards
Gopal Sarkar
Scientist.
