pseudo_firmware.cpp

#define DPRAM_SHARED     0x00012000
#define NUM_RING_ENTRIES 20

/* the command is at the start of shared DPRAM */
#define RBUFF        ((volatile struct ring_buffer *)DPRAM_SHARED)

struct ring_buffer {
    volatile uint8_t ring_head;
    volatile uint8_t ring_tail;
    struct {
           char str[10];
           uint8_t integers[4];
    } buffer[NUM_RING_ENTRIES];
};

void add_to_ring_buffer(char str[], uint32_t integers[])
{
    memcpy(RBUFF->str, str, sizeof(char)*10);           //check if its available on PRU, else use for loop
    memcpy(RBUFF->integers, integers, sizeof(uint32_t)*3);
    RBUFF->ring_tail = (RBUFF->ring_tail + 1) % NUM_RING_ENTRIES;
}

void main()
{
    uint32_t deb_ints[3] = {0};
    char deb_str[10] = "";
    ////code
    strcpy(deb_str, "Fault occured");           //this
    deb_ints[0] = SYSCFG;                       //is
    add_to_ring_buffer(deb_str,deb_ints);       //for debug
    //continue
}