main.c

#include <stdio.h>
#include <stdint.h>
#include "krv_utils.h"
#include "xprintf.h"

#define USE_VL53L1X (1)
#define USE_SDRAM   (1)

#ifdef USE_VL53L1X
    #include "qsys_i2c.h"
    #include "VL53L1X.h"
#endif //USE_VL53L1X

#ifdef USE_SDRAM
int32_t sdram_test(void) {
    uint32_t
    data,length;

    length = SDRAM_0_END - SDRAM_0_BASE;

    xprintf("SDRAM write start\r\n");
    for (int k = 0 ; k < length ; k = k + 4) {
        put32(SDRAM_0_BASE + k, k);
    }

    xprintf("SDRAM read start\r\n");
    for (int k = 0 ; k < length ; k = k + 4) {
        data = get32(SDRAM_0_BASE + k);
        if(data != k) {
            xprintf("error fount at 0x%x: expecting %d but got %d\r\n",k,k,data);
            return -1;
        }
    }
    return 0;
}
#endif // USE_SDRAM

// main function
int32_t main(int argc, char *argv[]) {
    uint64_t i;
    xdev_out(&uart_putc);       // override xprintf

#ifdef USE_VL53L1X
    xprintf("I2C init\r\n");
    i2c_init(I2C_0_BASE);
    i2c_disable_isr(I2C_0_BASE);

    if(true == VL53L1X_init()) {
        xprintf("VL5351X init OK.\r\n");
        VL53L1X_setDistanceMode(VL53L1X_Long);
        VL53L1X_setMeasurementTimingBudget(50000);

        VL53L1X_startContinuous(50);
    } else {
        xprintf("VL5351X init failed.\r\n");
    }
#endif //USE_VL53L1X

uint32_t data = 0;

#ifdef USE_SDRAM
    if(0 == sdram_test()) {
        xprintf("SDRAM r/w test OK!\r\n");
    } else {
        xprintf("SDRAM r/w test fail......\r\n");
    }
#endif //USE_SDRAM

    xprintf("KyogenRV (RV32I) Start...\r\n");
    while(1){
        wait_ms(500);
        put32(PIO_0_BASE, 0x55);
        wait_ms(500);
        put32(PIO_0_BASE, 0xAA);

#ifdef USE_VL53L1X
        data = VL53L1X_read(true);
        xprintf("value = %d\r\n",data);
#else
        i = get_time_ms() / 1000;
        xprintf("machine time = %llu second\r\n",i);
#endif //USE_VL53L1X
    }
    return 0;
}