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-rw-r--r--host/apps/omap_debug/usrp-e-mm-loopback.c194
1 files changed, 194 insertions, 0 deletions
diff --git a/host/apps/omap_debug/usrp-e-mm-loopback.c b/host/apps/omap_debug/usrp-e-mm-loopback.c
new file mode 100644
index 000000000..d11cf7d09
--- /dev/null
+++ b/host/apps/omap_debug/usrp-e-mm-loopback.c
@@ -0,0 +1,194 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/mman.h>
+#include "usrp_e.h"
+
+// max length #define PKT_DATA_LENGTH 1016
+static int packet_data_length;
+static int error;
+
+struct pkt {
+ int len;
+ int checksum;
+ int seq_num;
+ short data[];
+};
+
+static int fp;
+
+static int calc_checksum(struct pkt *p)
+{
+ int i, sum;
+
+ i = 0;
+ sum = 0;
+
+ for (i=0; i < p->len; i++)
+ sum += p->data[i];
+
+ sum += p->seq_num;
+ sum += p->len;
+
+ return sum;
+}
+
+static void *read_thread(void *threadid)
+{
+ char *rx_data;
+ int cnt, prev_seq_num, pkt_count, seq_num_failure;
+ struct pkt *p;
+ unsigned long bytes_transfered, elapsed_seconds;
+ struct timeval start_time, finish_time;
+
+ printf("Greetings from the reading thread!\n");
+
+ bytes_transfered = 0;
+ gettimeofday(&start_time, NULL);
+
+ // IMPORTANT: must assume max length packet from fpga
+ rx_data = malloc(2048);
+ p = (struct pkt *) ((void *)rx_data);
+
+ prev_seq_num = 0;
+ pkt_count = 0;
+ seq_num_failure = 0;
+
+ while (1) {
+
+ cnt = read(fp, rx_data, 2048);
+ if (cnt < 0)
+ printf("Error returned from read: %d, sequence number = %d\n", cnt, p->seq_num);
+
+// printf("p->seq_num = %d\n", p->seq_num);
+
+
+ pkt_count++;
+
+ if (p->seq_num != prev_seq_num + 1) {
+ printf("Sequence number fail, current = %d, previous = %d, pkt_count = %d\n",
+ p->seq_num, prev_seq_num, pkt_count);
+
+ seq_num_failure ++;
+ if (seq_num_failure > 2)
+ error = 1;
+ }
+
+ prev_seq_num = p->seq_num;
+
+ if (calc_checksum(p) != p->checksum) {
+ printf("Checksum fail packet = %X, expected = %X, pkt_count = %d\n",
+ calc_checksum(p), p->checksum, pkt_count);
+ error = 1;
+ }
+
+ bytes_transfered += cnt;
+
+ if (bytes_transfered > (100 * 1000000)) {
+ gettimeofday(&finish_time, NULL);
+ elapsed_seconds = finish_time.tv_sec - start_time.tv_sec;
+
+ printf("RX data transfer rate = %f K Samples/second\n",
+ (float) bytes_transfered / (float) elapsed_seconds / 4000);
+
+
+ start_time = finish_time;
+ bytes_transfered = 0;
+ }
+
+
+// printf(".");
+// fflush(stdout);
+// printf("\n");
+ }
+
+}
+
+static void *write_thread(void *threadid)
+{
+ int seq_number, i, cnt;
+ void *tx_data;
+ struct pkt *p;
+
+ printf("Greetings from the write thread!\n");
+
+ tx_data = malloc(2048);
+ p = (struct pkt *) ((void *)tx_data);
+
+ for (i=0; i < packet_data_length; i++)
+// p->data[i] = random() >> 16;
+ p->data[i] = i;
+
+ seq_number = 1;
+
+ while (1) {
+ p->seq_num = seq_number++;
+
+ if (packet_data_length > 0)
+ p->len = packet_data_length;
+ else
+ p->len = (random() & 0x1ff) + (1004 - 512);
+
+ p->checksum = calc_checksum(p);
+
+ cnt = write(fp, tx_data, p->len * 2 + 12);
+ if (cnt < 0)
+ printf("Error returned from write: %d\n", cnt);
+// sleep(1);
+ }
+}
+
+
+int main(int argc, char *argv[])
+{
+ pthread_t tx, rx;
+ long int t;
+ struct sched_param s = {
+ .sched_priority = 1
+ };
+ void *rb;
+ struct usrp_transfer_frame *tx_rb, *rx_rb;
+
+ if (argc < 2) {
+ printf("%s data_size\n", argv[0]);
+ return -1;
+ }
+
+ packet_data_length = atoi(argv[1]);
+
+ fp = open("/dev/usrp_e0", O_RDWR);
+ printf("fp = %d\n", fp);
+
+ rb = mmap(0, 202 * 4096, PROT_READ|PROT_WRITE, MAP_SHARED, fp, 0);
+ if (!rb) {
+ printf("mmap failed\n");
+ exit;
+ }
+
+
+ sched_setscheduler(0, SCHED_RR, &s);
+ error = 0;
+
+#if 1
+ if (pthread_create(&rx, NULL, read_thread, (void *) t)) {
+ printf("Failed to create rx thread\n");
+ exit(-1);
+ }
+
+ sleep(1);
+#endif
+
+ if (pthread_create(&tx, NULL, write_thread, (void *) t)) {
+ printf("Failed to create tx thread\n");
+ exit(-1);
+ }
+
+// while (!error)
+ sleep(1000000000);
+
+ printf("Done sleeping\n");
+}