Use of Xil_Out32 in Xilinx SDK

Question

In Vivado I succesfully made a simple blockdiagram to control the LEDs of my Zybo board. I can observe that the offset address for my LEDs is: 0x4120 0000 and the High Address is 0x4120 FFFF. Now when I go to the SDK:

#include <xil_printf.h>
#include <xil_types.h>
#include "platform.h"
#include "xgpio_l.h"

volatile u32 *LED_DATA = (u32 *) 0x41200000 ;   
int main()
{

    init_platform();

    xil_printf(" Writing to LEDs:   \n\r");
    Xil_Out32((&LED_DATA) + (0x00)  , 0xFFFFFFFF);     //All LEDs ON

    cleanup_platform();
    return 0;
}

I programmed the FPGA and run the above code. But still no success whatsoever. Could someone point out my errors?

Thanks in advance

score 0 · Answer 1 · answered Apr 11 '15 at 15:26

0

Your mistake is to use &LED_DATA, which return the address of the pointer LED_DATA, not 0x41200000 as I think you expect.

Try

Xil_out32(0x41200000, 0xFFFFFFFF);

or

*LED_DATA = 0xFFFFFFFF;

answered Apr 11 '15 at 15:26

Jonathan Drolet

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Thanks for the reply Jonathan. I already tried this but unfortunately it only results in hanging of the software. – user3488736 Apr 11 '15 at 16:00
Did you use the axi_gpio module to control your leds? – Jonathan Drolet Apr 11 '15 at 16:04
Yes I did, this is the reason for me asking. Normally it should work. – user3488736 Apr 11 '15 at 18:20
I tested the code I gave you, it works (on a microblaze, but still). If the system hangs, it's usually because the bus transfer never returns. Double-check your system, I suggest you use the defines in instead of manual address input. – Jonathan Drolet Apr 11 '15 at 18:23
I'll try the defines within , thanks anyway :) – user3488736 Apr 11 '15 at 19:00
I'm working on the same project. is there any reference or book for programming of microblaze in SDK environment? – hamid kavianathar Jun 29 '16 at 11:14
Look for UG643. It has basic API reference as well as links to other interesting documents. – Jonathan Drolet Jun 30 '16 at 03:20

score 0 · Answer 2 · answered May 09 '15 at 00:49

try

#define ADDR 0x41200000 // write this before main() function.

Then you have to add the following line within main function.

Xil_Out32(ADDR + 0x00000000)  , 0xFFFFFFFF);     //All LEDs ON

This should work.

score 0 · Answer 3 · answered Dec 13 '17 at 21:35

This work

#define ADDRESS_GPIO_0   0x41200000     // vivado block diagram address editor

XGpioPs_Config * ConfigPtr1 = XGpioPs_LookupConfig(XPAR_PS7_GPIO_0_DEVICE_ID);
XGpioPs_CfgInitialize(&Gpio1, ConfigPtr1, ADDRESS_GPIO_0);
XGpioPs_SetDirection(&Gpio1, XGPIOPS_BANK0, 0x0F);
XGpioPs_Write(&Gpio1, XGPIOPS_BANK0, 0x0F);

score 0 · Answer 4 · edited Jun 20 '20 at 09:12

0

Thank you for this post. It helped me resolve a compile issue in sdk. The issue was that the line below would not compile.

xil_printf("Wrote: 0x%08x \n\r", *(baseaddr_p+0));

I added this and it worked:

include "xil_printf.h"

Thanks so much Rajat Sewal

edited Jun 20 '20 at 09:12

Community

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answered Oct 04 '19 at 19:42

Rajat Sewal

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Use of Xil_Out32 in Xilinx SDK

4 Answers4

include "xil_printf.h"