HDLForBeginners_Examples/ZynqSeries/helloworld.c

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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 "xgpio.h"
#include "xbram.h"


#define LED_CHANNEL 1
#define SWITCH_CHANNEL 2
#define LEDS_MASK 0x0F   // 4 leds
#define SWITCHES_MASK 0x0F   // 4 switches
#define XPAR_BRAM_0_BASEADDR  XPAR_AXI_BRAM_CTRL_0_S_AXI_BASEADDR


int main()
{


    init_platform();

	XGpio Gpio; /* The Instance of the GPIO Driver */
	XBram Bram;	/* The Instance of the BRAM Driver */

	XBram_Config *ConfigPtr;

	int Status;

	/* Initialize the GPIO driver */
	Status = XGpio_Initialize(&Gpio, XPAR_GPIO_0_BASEADDR);
	if (Status != XST_SUCCESS) {
		xil_printf("Gpio Initialization Failed\r\n");
		return XST_FAILURE;
	}


	ConfigPtr = XBram_LookupConfig(XPAR_BRAM_0_DEVICE_ID);
	if (ConfigPtr == (XBram_Config *) NULL) {
		return XST_FAILURE;
	}

	Status = XBram_CfgInitialize(&Bram, ConfigPtr,
				     ConfigPtr->CtrlBaseAddress);
	if (Status != XST_SUCCESS) {
		return XST_FAILURE;
	}


	/* Set the direction for all signals  */
	XGpio_SetDataDirection(&Gpio, LED_CHANNEL, ~LEDS_MASK); // output
	XGpio_SetDataDirection(&Gpio, SWITCH_CHANNEL, SWITCHES_MASK); // input



    print("Hello World\n\r");
    print("Successfully ran Hello World application");


    for (int i = 0; i < 16*4; i=i+4){
    	XBram_WriteReg(XPAR_BRAM_0_BASEADDR,i,i);

    }

    int out_data;

    for (int i = 0; i < 16*4; i=i+4){
    	out_data = XBram_ReadReg(XPAR_BRAM_0_BASEADDR,i);
		xil_printf("%d: %d\n\r",i, out_data);

    }

    while(1){
    	u32 switches = XGpio_DiscreteRead(&Gpio,SWITCH_CHANNEL);
		XGpio_DiscreteWrite(&Gpio, LED_CHANNEL, switches);
		xil_printf("checked! %x\n\r",switches);
		sleep(1);
    }


    cleanup_platform();
    return 0;
}