2 files changed, 60 insertions, 17 deletions

diff --git a/host/apps/omap_debug/usrp-e-rw.c b/host/apps/omap_debug/usrp-e-rw.c
index 5607166b0..5fd73e9b6 100644
--- a/host/apps/omap_debug/usrp-e-rw.c
+++ b/host/apps/omap_debug/usrp-e-rw.c
@@ -4,11 +4,16 @@
 #include <pthread.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <stddef.h>
+#include "usrp_e.h"
+
+#define PKT_DATA_LENGTH 30
+// max length #define PKT_DATA_LENGTH 1016
 
 struct pkt {
 	int checksum;
 	int seq_num;
-	short data[1020];
+	short data[PKT_DATA_LENGTH];
 };
 
 static int fp;
@@ -20,7 +25,7 @@ static int calc_checksum(struct pkt *p)
 	i = 0;
 	sum = 0;
 
-	for (i=0; i<1020; i++)
+	for (i=0; i<PKT_DATA_LENGTH; i++)
 		sum += p->data[i];
 
 	sum += p->seq_num;
@@ -31,23 +36,35 @@ static int calc_checksum(struct pkt *p)
 static void *read_thread(void *threadid)
 {
 	int cnt, prev_seq_num;
-	struct pkt rx_data;
+	struct usrp_transfer_frame *rx_data;
+	struct pkt *p;
 
 	printf("Greetings from the reading thread!\n");
 
+	rx_data = malloc(sizeof(struct usrp_transfer_frame) + sizeof(struct pkt));
+	p = (struct pkt *) ((void *)rx_data + offsetof(struct usrp_transfer_frame, buf));
+	//p = &(rx_data->buf[0]);
+	printf("Address of rx_data = %p, p = %p\n", rx_data, p);
+	printf("offsetof = %d\n", offsetof(struct usrp_transfer_frame, buf));
+	printf("sizeof rx data = %X\n", sizeof(struct usrp_transfer_frame) + sizeof(struct pkt));
+
 	prev_seq_num = 0;
 
 	while (1) {
-		cnt = read(fp, &rx_data, 2048);
 
-		if (rx_data.seq_num != prev_seq_num + 1)
-			printf("Sequence number fail, current = %d, previous = %d\n",
-				rx_data.seq_num, prev_seq_num);
-		prev_seq_num = rx_data.seq_num;
+		cnt = read(fp, rx_data, 2048);
+		printf("Packet received, flags = %X, len = %X\n", rx_data->flags, rx_data->len);
+		printf("p->seq_num = %d\n", p->seq_num);
+
+		if (p->seq_num != prev_seq_num + 1)
+			printf("Sequence number fail, current = %X, previous = %X\n",
+				p->seq_num, prev_seq_num);
+		prev_seq_num = p->seq_num;
 
-		if (calc_checksum(&rx_data) != rx_data.checksum)
-			printf("Checksum fail packet = %d, expected = %d\n",
-				calc_checksum(&rx_data), rx_data.checksum);
+		if (calc_checksum(p) != p->checksum)
+			printf("Checksum fail packet = %X, expected = %X\n",
+				calc_checksum(p), p->checksum);
+		printf("\n");
 	}
 
 }
@@ -55,20 +72,31 @@ static void *read_thread(void *threadid)
 static void *write_thread(void *threadid)
 {
 	int seq_number, i, cnt;
-	struct pkt tx_data;
+	struct usrp_transfer_frame *tx_data;
+	struct pkt *p;
 
 	printf("Greetings from the write thread!\n");
 
-	for (i=0; i<1020; i++)
-		tx_data.data[i] = random() >> 16;
+	tx_data = malloc(sizeof(struct usrp_transfer_frame) + sizeof(struct pkt));
+	p = (struct pkt *) ((void *)tx_data + offsetof(struct usrp_transfer_frame, buf));
+	printf("Address of tx_data = %p, p = %p\n", tx_data, p);
 
+	printf("sizeof tx data = %X\n", sizeof(struct usrp_transfer_frame) + sizeof(struct pkt));
+
+	for (i=0; i<PKT_DATA_LENGTH; i++)
+//		p->data[i] = random() >> 16;
+		p->data[i] = i;
+
+	tx_data->flags = 0xdeadbeef;
+	tx_data->len = 8 + PKT_DATA_LENGTH * 2;
 
 	seq_number = 1;
 
 	while (1) {
-		tx_data.seq_num = seq_number++;
-		tx_data.checksum = calc_checksum(&tx_data);
-		cnt = write(fp, &tx_data, 2048);
+		p->seq_num = seq_number++;
+		p->checksum = calc_checksum(p);
+		cnt = write(fp, tx_data, 2048);
+		sleep(1);
 	}
 }
 
@@ -86,6 +114,8 @@ int main(int argc, char *argv[])
 		exit(-1);
 	}
 
+	sleep(1);
+
 	if (pthread_create(&tx, NULL, write_thread, (void *) t)) {
 		printf("Failed to create tx thread\n");
 		exit(-1);
diff --git a/host/apps/omap_debug/usrp_e.h b/host/apps/omap_debug/usrp_e.h
index aa8ef3d57..48a3201cb 100644
--- a/host/apps/omap_debug/usrp_e.h
+++ b/host/apps/omap_debug/usrp_e.h
@@ -69,4 +69,17 @@ struct usrp_e_i2c {
 #define USRP_E_I2C_READ		_IOR(USRP_E_IOC_MAGIC, 0x25, struct usrp_e_i2c)
 #define USRP_E_I2C_WRITE	_IOW(USRP_E_IOC_MAGIC, 0x26, struct usrp_e_i2c)
 
+// Data transfer frame definition
+
+struct usrp_transfer_frame {
+	__u32 flags;
+	__u32 len;
+	__u8  buf[];
+};
+
+struct ring_buffer_entry {
+	unsigned long dma_addr;
+	struct usrp_transfer_frame *frame_addr;
+};
+
 #endif