mirror of
https://github.com/saymrwulf/uhd.git
synced 2026-05-16 21:10:10 +00:00
149 lines
3.1 KiB
C
149 lines
3.1 KiB
C
#include <stdio.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stddef.h>
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#include "usrp_e.h"
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// max length #define PKT_DATA_LENGTH 1014
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static int packet_data_length;
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struct pkt {
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int checksum;
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int seq_num;
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int len;
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short data[];
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};
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static int fp;
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static int calc_checksum(struct pkt *p)
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{
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int i, sum;
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i = 0;
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sum = 0;
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for (i=0; i < p->len; i++)
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sum += p->data[i];
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sum += p->seq_num;
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return sum;
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}
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int randN(int n)
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{
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long tmp;
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tmp = rand() % n;
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return tmp;
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}
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static void *read_thread(void *threadid)
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{
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int cnt, prev_seq_num;
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struct usrp_transfer_frame *rx_data;
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struct pkt *p;
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printf("Greetings from the reading thread!\n");
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// IMPORTANT: must assume max length packet from fpga
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rx_data = malloc(sizeof(struct usrp_transfer_frame) + sizeof(struct pkt) + (1014 * 2));
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rx_data = malloc(2048);
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p = (struct pkt *) ((void *)rx_data + offsetof(struct usrp_transfer_frame, buf));
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//p = &(rx_data->buf[0]);
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printf("Address of rx_data = %p, p = %p\n", rx_data, p);
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printf("offsetof = %d\n", offsetof(struct usrp_transfer_frame, buf));
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printf("sizeof rx data = %d\n", sizeof(struct usrp_transfer_frame) + sizeof(struct pkt));
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prev_seq_num = 0;
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while (1) {
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cnt = read(fp, rx_data, 2048);
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// printf("Packet received, status = %X, len = %d\n", rx_data->status, rx_data->len);
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// printf("p->seq_num = %d\n", p->seq_num);
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if (p->seq_num != prev_seq_num + 1)
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printf("Sequence number fail, current = %d, previous = %d\n",
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p->seq_num, prev_seq_num);
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prev_seq_num = p->seq_num;
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if (calc_checksum(p) != p->checksum)
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printf("Checksum fail packet = %d, expected = %d\n",
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calc_checksum(p), p->checksum);
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printf(".");
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fflush(stdout);
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// printf("\n");
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}
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}
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static void *write_thread(void *threadid)
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{
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int seq_number, i, cnt, pkt_cnt;
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struct usrp_transfer_frame *tx_data;
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struct pkt *p;
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printf("Greetings from the write thread!\n");
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// Allocate max length buffer for frame
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tx_data = malloc(2048);
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p = (struct pkt *) ((void *)tx_data + offsetof(struct usrp_transfer_frame, buf));
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printf("Address of tx_data = %p, p = %p\n", tx_data, p);
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printf("sizeof rp_transfer_frame = %d, sizeof pkt = %d\n", sizeof(struct usrp_transfer_frame), sizeof(struct pkt));
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for (i=0; i < 1014; i++)
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// p->data[i] = random() >> 16;
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p->data[i] = i;
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tx_data->status = 0xdeadbeef;
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tx_data->len = 8 + packet_data_length * 2;
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printf("tx_data->len = %d\n", tx_data->len);
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seq_number = 1;
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while (1) {
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pkt_cnt = randN(16);
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for (i = 0; i < pkt_cnt; i++) {
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p->seq_num = seq_number++;
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p->len = randN(1013) + 1;
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p->checksum = calc_checksum(p);
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tx_data->len = 12 + p->len * 2;
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cnt = write(fp, tx_data, tx_data->len + 8);
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}
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sleep(random() >> 31);
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}
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}
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int main(int argc, char *argv[])
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{
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pthread_t tx, rx;
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long int t;
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fp = open("/dev/usrp_e0", O_RDWR);
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printf("fp = %d\n", fp);
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if (pthread_create(&rx, NULL, read_thread, (void *) t)) {
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printf("Failed to create rx thread\n");
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exit(-1);
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}
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sleep(1);
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if (pthread_create(&tx, NULL, write_thread, (void *) t)) {
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printf("Failed to create tx thread\n");
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exit(-1);
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}
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sleep(1000000000);
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printf("Done sleeping\n");
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}
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