SDK code

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/*
 * helloworld.c: simple test application
 *
 * This application configures UART 16550 to baud rate 9600.
 * PS7 UART (Zynq) is not initialized by this application, since
 * bootrom/bsp configures it to baud rate 115200
 *
 * —----------------------------------------------
 * | UART TYPE   BAUD RATE                        |
 * —----------------------------------------------
 *   uartns550   9600
 *   uartlite    Configurable only in HW design
 *   ps7_uart    115200 (configured by bootrom/bsp)
 */

#include <stdio.h>
#include "platform.h"
#include "xil_printf.h"
#include <xmatrixsplitter.h>
#include <xmatrixjoiner.h>
#include <xmatrixsplitter_hw.h>
#include <xmatrixjoiner_hw.h>


int main()
{
    init_platform();

    //Xil_ICacheDisable();
    //Xil_DCacheDisable();

    int matA[2][2]={
        {1, 3},
      {5, 7}
    };
    int matB[2][2]={
        {11, 13},
      {17, 19}
    };
    int result[2][2]={
            {0, 0},
          {0, 0}
        };

    XMatrixsplitter splitter;
    XMatrixsplitter_Initialize(&splitter, (char*) 0x43c00000);
    XMatrixjoiner joiner;
    XMatrixjoiner_Initialize(&joiner, (char*) 0x43c10000);

    while (!XMatrixsplitter_IsReady(&splitter));
    XMatrixsplitter_Write_a_Words(&splitter, 0, (char*) matA, 4);
    XMatrixsplitter_Write_b_Words(&splitter, 0, (char*) matB, 4);

    print("Starting\n");

    for (int i = 0; i<4; i++){//this is the mysterious loop
        XMatrixsplitter_Start(&splitter);
        XMatrixjoiner_Start(&joiner);

    }

    print("Started\n");

    while (!XMatrixjoiner_IsDone(&joiner));//<-this is where the code gets stuck
                                            //(unless we call start 4 times)

    print("Joiner is done\n");

    XMatrixjoiner_Read_out_r_Words(&joiner, 0, (char*)result, 4);

    printf("Result:\n[%d, %d,\n%d, %d]\r", result[0][0],result[0][1],result[1][0],result[1][1]);


    cleanup_platform();
    return 0;
}