Make connections to existing IP

Hello all,

I would like to know the procedure for making connections after adding the existing IP adder /subtraction module.

How do I make connections to the existing IP, especially the adder/subtractor and multiplier modules and how do I communicate with them, meaning how do I transfer the input store the data, process and get the output and where do I store it. .

Also provide me some additional documentation if any on how do I make those connections.

Thanks and Regards,
Dinesh.

Parents

0 Former Member over 11 years ago

Hi,

Thank you for your response.

I have been trying to implement a floating point adder which sends A and B and gets back C.

We have sent A, B successfully and C is calculated properly which is observed in the logic analyzer.

I have been using two DMA's for sending A and B and I am getting back C on one of them i.e dma_0.

For some reason I am not able to get back the calculated value back into C.

I have also tried the tlast and tlast is getting asserted and the results are shown on the logic analyzer but its not getting back into the C variable and is not printing in the terminal of SDK.

Could you please help me out with this issue.

I am using the following
vivado and sdk- 2013.4 and windows OS.

Attached is the code.

#include <stdio.h>
#include "platform.h"
#include "ps7_init.h"
#include <xil_io.h>
#include "xscugic.h"
#include "xparameters.h"
#include "xaxidma.h"

// AXI DMA Instance
XAxiDma AxiDma;
XAxiDma AxiDma1;
///////////////////////////////////////initializing DMA 0 //////////////////////////////////////////////////////////////////////////////
int init_dma(){
XAxiDma_Config *CfgPtr;
int status;
CfgPtr = XAxiDma_LookupConfig(XPAR_AXI_DMA_0_DEVICE_ID);
if(!CfgPtr){
print("Error looking for AXI DMA config
r");
return XST_FAILURE;
}
status = XAxiDma_CfgInitialize(&AxiDma,CfgPtr);
if(status != XST_SUCCESS){
print("Error initializing DMA
r");
return XST_FAILURE;
}
//check for scatter gather mode
if(XAxiDma_HasSg(&AxiDma)){
print("Error DMA configured in SG mode
r");
return XST_FAILURE;
}
/* Disable interrupts, we use polling mode */
XAxiDma_IntrDisable(&AxiDma,
XAXIDMA_IRQ_ALL_MASK,XAXIDMA_DEVICE_TO_DMA);
XAxiDma_IntrDisable(&AxiDma,
XAXIDMA_IRQ_ALL_MASK,XAXIDMA_DMA_TO_DEVICE);
return XST_SUCCESS;
}

int init_dma1(){
XAxiDma_Config *CfgPtr;
int status;
CfgPtr = XAxiDma_LookupConfig(XPAR_AXI_DMA_1_DEVICE_ID);
if(!CfgPtr){
print("Error looking for AXI DMA config
r");
return XST_FAILURE;
}
status = XAxiDma_CfgInitialize(&AxiDma1,CfgPtr);
if(status != XST_SUCCESS){
print("Error initializing DMA
r");
return XST_FAILURE;
}
//check for scatter gather mode
if(XAxiDma_HasSg(&AxiDma1)){
print("Error DMA configured in SG mode
r");
return XST_FAILURE;
}
/* Disable interrupts, we use polling mode */
XAxiDma_IntrDisable(&AxiDma1,
XAXIDMA_IRQ_ALL_MASK,XAXIDMA_DEVICE_TO_DMA);
XAxiDma_IntrDisable(&AxiDma1,
XAXIDMA_IRQ_ALL_MASK,XAXIDMA_DMA_TO_DEVICE);
return XST_SUCCESS;
}

int main()
{
    init_platform();
    ps7_post_config();
    xil_printf("Hello World
r");
    int status;
    // Init DMA
    status = init_dma();
    if(status != XST_SUCCESS){
    print("rError: DMA init failed
");
    return XST_FAILURE;
    }
    print("rDMA0 Init done
r");

    status = init_dma1();
            if(status != XST_SUCCESS){
            print("rError: DMA init failed
");
            return XST_FAILURE;
            }
            print("rDMA1 Init done
r");

    float A=8.3,B=-3.3,C;
    int whole,thousandths;

    xil_printf("
raddress of A, B, C is %x,%x",&A,&B);
   //unsigned dma_size=4;
    unsigned int dma_size = sizeof(float);
    //flush the cache

    Xil_DCacheFlushRange((u32) &C,dma_size);

    print("rCache cleared
r");

    status = XAxiDma_SimpleTransfer(&AxiDma, (u32) &C, dma_size, XAXIDMA_DEVICE_TO_DMA);
    xil_printf("
rXAxiDMA_SimpleTransfer C status = %d
",status);
    if (status != XST_SUCCESS) {
         print("Error RX: DMA transfer from Vivado HLS block failed
");
         return XST_FAILURE;
    }

    Xil_DCacheFlushRange((u32) &A,dma_size);
    status = XAxiDma_SimpleTransfer(&AxiDma, (u32) &A, dma_size, XAXIDMA_DMA_TO_DEVICE);
    xil_printf("XAxiDMA_SimpleTransfer A status = %d
",status);
    if (status != XST_SUCCESS) {
    print("Error TX: DMA transfer to Vivado HLS block failed
r");
    return XST_FAILURE;
    }
    print("rTransfer done");
    /* Wait for transfer to be done */
    while (XAxiDma_Busy(&AxiDma, XAXIDMA_DMA_TO_DEVICE)) ;
    print("
rDMA Finished");

    Xil_DCacheFlushRange((u32) &B,dma_size);
    status = XAxiDma_SimpleTransfer(&AxiDma1, (u32) &B, dma_size, XAXIDMA_DMA_TO_DEVICE);
    xil_printf("XAxiDMA_SimpleTransfer B status = %d
",status);
    if (status != XST_SUCCESS) {
    print("Error TX: DMA transfer from Vivado HLS block failed
");
    return XST_FAILURE;
    }
    /* Wait for transfer to be done */
    while (XAxiDma_Busy(&AxiDma1, XAXIDMA_DMA_TO_DEVICE)) ;
    print("
rDMA1 Finished");
;
    //poll the DMA engine to verify transfers are complete
    /* Waiting for data processing */

    /* Wait for transfer to be done */
    while ((XAxiDma_Busy(&AxiDma, XAXIDMA_DEVICE_TO_DMA)) ||
    (XAxiDma_Busy(&AxiDma, XAXIDMA_DMA_TO_DEVICE))) ;

    whole=A;
    thousandths=(A - whole) * 100000000;
    xil_printf("
r This is the value of A in float = %d.%d",whole,thousandths);

    whole=B;
    thousandths=(B - whole) * 100000000;
    xil_printf("
r This is the value of B in float = %d.%d",whole,thousandths);

    whole=C;
    thousandths=(C - whole) * 100000000;
    xil_printf("
r This is the value of C in float = %d.%d",whole,thousandths);

    print("
rEnd of code");
    return 0;
}
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0 Former Member over 11 years ago

Hi,

Thank you for your response.

I have been trying to implement a floating point adder which sends A and B and gets back C.

We have sent A, B successfully and C is calculated properly which is observed in the logic analyzer.

I have been using two DMA's for sending A and B and I am getting back C on one of them i.e dma_0.

For some reason I am not able to get back the calculated value back into C.

I have also tried the tlast and tlast is getting asserted and the results are shown on the logic analyzer but its not getting back into the C variable and is not printing in the terminal of SDK.

Could you please help me out with this issue.

I am using the following
vivado and sdk- 2013.4 and windows OS.

Attached is the code.

#include <stdio.h>
#include "platform.h"
#include "ps7_init.h"
#include <xil_io.h>
#include "xscugic.h"
#include "xparameters.h"
#include "xaxidma.h"

// AXI DMA Instance
XAxiDma AxiDma;
XAxiDma AxiDma1;
///////////////////////////////////////initializing DMA 0 //////////////////////////////////////////////////////////////////////////////
int init_dma(){
XAxiDma_Config *CfgPtr;
int status;
CfgPtr = XAxiDma_LookupConfig(XPAR_AXI_DMA_0_DEVICE_ID);
if(!CfgPtr){
print("Error looking for AXI DMA config
r");
return XST_FAILURE;
}
status = XAxiDma_CfgInitialize(&AxiDma,CfgPtr);
if(status != XST_SUCCESS){
print("Error initializing DMA
r");
return XST_FAILURE;
}
//check for scatter gather mode
if(XAxiDma_HasSg(&AxiDma)){
print("Error DMA configured in SG mode
r");
return XST_FAILURE;
}
/* Disable interrupts, we use polling mode */
XAxiDma_IntrDisable(&AxiDma,
XAXIDMA_IRQ_ALL_MASK,XAXIDMA_DEVICE_TO_DMA);
XAxiDma_IntrDisable(&AxiDma,
XAXIDMA_IRQ_ALL_MASK,XAXIDMA_DMA_TO_DEVICE);
return XST_SUCCESS;
}

int init_dma1(){
XAxiDma_Config *CfgPtr;
int status;
CfgPtr = XAxiDma_LookupConfig(XPAR_AXI_DMA_1_DEVICE_ID);
if(!CfgPtr){
print("Error looking for AXI DMA config
r");
return XST_FAILURE;
}
status = XAxiDma_CfgInitialize(&AxiDma1,CfgPtr);
if(status != XST_SUCCESS){
print("Error initializing DMA
r");
return XST_FAILURE;
}
//check for scatter gather mode
if(XAxiDma_HasSg(&AxiDma1)){
print("Error DMA configured in SG mode
r");
return XST_FAILURE;
}
/* Disable interrupts, we use polling mode */
XAxiDma_IntrDisable(&AxiDma1,
XAXIDMA_IRQ_ALL_MASK,XAXIDMA_DEVICE_TO_DMA);
XAxiDma_IntrDisable(&AxiDma1,
XAXIDMA_IRQ_ALL_MASK,XAXIDMA_DMA_TO_DEVICE);
return XST_SUCCESS;
}

int main()
{
    init_platform();
    ps7_post_config();
    xil_printf("Hello World
r");
    int status;
    // Init DMA
    status = init_dma();
    if(status != XST_SUCCESS){
    print("rError: DMA init failed
");
    return XST_FAILURE;
    }
    print("rDMA0 Init done
r");

    status = init_dma1();
            if(status != XST_SUCCESS){
            print("rError: DMA init failed
");
            return XST_FAILURE;
            }
            print("rDMA1 Init done
r");

    float A=8.3,B=-3.3,C;
    int whole,thousandths;

    xil_printf("
raddress of A, B, C is %x,%x",&A,&B);
   //unsigned dma_size=4;
    unsigned int dma_size = sizeof(float);
    //flush the cache

    Xil_DCacheFlushRange((u32) &C,dma_size);

    print("rCache cleared
r");

    status = XAxiDma_SimpleTransfer(&AxiDma, (u32) &C, dma_size, XAXIDMA_DEVICE_TO_DMA);
    xil_printf("
rXAxiDMA_SimpleTransfer C status = %d
",status);
    if (status != XST_SUCCESS) {
         print("Error RX: DMA transfer from Vivado HLS block failed
");
         return XST_FAILURE;
    }

    Xil_DCacheFlushRange((u32) &A,dma_size);
    status = XAxiDma_SimpleTransfer(&AxiDma, (u32) &A, dma_size, XAXIDMA_DMA_TO_DEVICE);
    xil_printf("XAxiDMA_SimpleTransfer A status = %d
",status);
    if (status != XST_SUCCESS) {
    print("Error TX: DMA transfer to Vivado HLS block failed
r");
    return XST_FAILURE;
    }
    print("rTransfer done");
    /* Wait for transfer to be done */
    while (XAxiDma_Busy(&AxiDma, XAXIDMA_DMA_TO_DEVICE)) ;
    print("
rDMA Finished");

    Xil_DCacheFlushRange((u32) &B,dma_size);
    status = XAxiDma_SimpleTransfer(&AxiDma1, (u32) &B, dma_size, XAXIDMA_DMA_TO_DEVICE);
    xil_printf("XAxiDMA_SimpleTransfer B status = %d
",status);
    if (status != XST_SUCCESS) {
    print("Error TX: DMA transfer from Vivado HLS block failed
");
    return XST_FAILURE;
    }
    /* Wait for transfer to be done */
    while (XAxiDma_Busy(&AxiDma1, XAXIDMA_DMA_TO_DEVICE)) ;
    print("
rDMA1 Finished");
;
    //poll the DMA engine to verify transfers are complete
    /* Waiting for data processing */

    /* Wait for transfer to be done */
    while ((XAxiDma_Busy(&AxiDma, XAXIDMA_DEVICE_TO_DMA)) ||
    (XAxiDma_Busy(&AxiDma, XAXIDMA_DMA_TO_DEVICE))) ;

    whole=A;
    thousandths=(A - whole) * 100000000;
    xil_printf("
r This is the value of A in float = %d.%d",whole,thousandths);

    whole=B;
    thousandths=(B - whole) * 100000000;
    xil_printf("
r This is the value of B in float = %d.%d",whole,thousandths);

    whole=C;
    thousandths=(C - whole) * 100000000;
    xil_printf("
r This is the value of C in float = %d.%d",whole,thousandths);

    print("
rEnd of code");
    return 0;
}
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