1 files changed, 382 insertions, 0 deletions
diff --git a/host/usrp_e_utils/usrp-e-timed.c b/host/usrp_e_utils/usrp-e-timed.c
new file mode 100644
index 000000000..407564429
--- /dev/null
+++ b/host/usrp_e_utils/usrp-e-timed.c
@@ -0,0 +1,382 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <string.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <poll.h>
+#include <sys/mman.h>
+#include "linux/usrp_e.h"
+
+// max length #define PKT_DATA_LENGTH 1016
+static int packet_data_length;
+
+struct ring_buffer_info (*rxi)[];
+struct ring_buffer_info (*txi)[];
+__u8 *rx_buf;
+__u8 *tx_buf;
+static struct usrp_e_ring_buffer_size_t rb_size;
+
+static int fp;
+static u_int32_t crc_tab[256];
+
+// CRC code from http://www.koders.com/c/fid699AFE0A656F0022C9D6B9D1743E697B69CE5815.aspx
+// GPLv2
+
+static u_int32_t chksum_crc32_gentab(void)
+{
+	unsigned long crc, poly;
+	unsigned long i, j;
+
+	poly = 0x04C11DB7L;
+
+	for (i = 0; i < 256; i++) {
+		crc = i;
+		for (j = 8; j > 0; j--) {
+			if (crc & 1) {
+				crc = (crc >> 1) ^ poly;
+			} else {
+				crc >>= 1;
+			}
+		}
+		crc_tab[i] = crc;
+//		printf("crc_tab[%d] = %X\n", i , crc);
+	}
+
+	return 0;
+}
+
+struct timeval delta_time(struct timeval f, struct timeval s)
+{
+	struct timeval d;
+
+	if (f.tv_usec > s.tv_usec) {
+		d.tv_usec = f.tv_usec - s.tv_usec;
+		d.tv_sec = f.tv_sec - s.tv_sec;
+	} else {
+		d.tv_usec = f.tv_usec - s.tv_usec + 1e6;
+		d.tv_sec = f.tv_sec - s.tv_sec - 1;
+	}
+
+	return d;
+}
+
+
+static void *read_thread(void *threadid)
+{
+	unsigned int cnt;
+	int rx_pkt_cnt, rb_read;
+	unsigned int i;
+	unsigned long crc, ck_sum;
+	unsigned int rx_crc, pkt_len, pkt_seq;
+	unsigned long bytes_transfered;
+	struct timeval start_time;
+	unsigned int prev_seq = 0;
+	int first = 1;
+	long tid;
+	__u8 *p;
+
+
+	tid = (long)threadid;
+	printf("Greetings from the reading thread(%ld)!\n", tid);
+
+	// IMPORTANT: must assume max length packet from fpga
+	
+	rx_pkt_cnt = 0;
+	rb_read = 0;
+
+	bytes_transfered = 0;
+	gettimeofday(&start_time, NULL);
+
+	while (1) {
+		
+		while (!((*rxi)[rb_read].flags & RB_USER)) {
+			struct pollfd pfd;
+			pfd.fd = fp;
+			pfd.events = POLLIN;
+			poll(&pfd, 1, -1);
+		}
+		(*rxi)[rb_read].flags = RB_USER_PROCESS;
+
+		rx_pkt_cnt++;
+		cnt = (*rxi)[rb_read].len;
+		p = rx_buf + (rb_read * 2048);
+
+		rx_crc = *(int *) &p[cnt-4];
+		crc = 0xFFFFFFFF;
+		ck_sum = 0;
+
+		pkt_len = *(unsigned int *) &p[0];
+		pkt_seq = *(unsigned int *) &p[4];
+
+//		printf("Pkt len = %X, pkt seq = %X, driver len = %X\n", pkt_len, pkt_seq, cnt);
+
+		if (pkt_len != (cnt - 4))
+			printf("Packet length check fail, driver len = %ud, content = %ud\n",
+					cnt, pkt_len);
+
+		if (!first && (pkt_seq != (prev_seq + 1)))
+			printf("Sequence number check fail, pkt_seq = %ud, prev_seq = %ud\n",
+					pkt_seq, prev_seq);
+		first = 0;
+		prev_seq = pkt_seq;
+
+		for (i = 0; i < cnt-4; i++) {
+			ck_sum += p[i];
+
+			crc = ((crc >> 8) & 0x00FFFFFF) ^
+				crc_tab[(crc ^ p[i]) & 0xFF];
+//printf("idx = %d, data = %X, crc = %X, ck_sum = %X\n", i, p[i], crc, ck_sum);
+//			crc = ((crc >> 8) & 0x00FFFFFF) ^
+//				crc_tab[(crc ^ p[i+1]) & 0xFF];
+//printf("idx = %d, data = %X, crc = %X\n", i, p[i+1],crc);
+		}
+
+		(*rxi)[rb_read].flags = RB_KERNEL;
+		write(fp, NULL, 1);
+
+		if (rx_crc != ck_sum)
+			printf("Ck_sum eror, calc ck_sum = %lX, rx ck_sum = %X\n",
+					ck_sum, rx_crc);
+
+#if 0
+		if (rx_crc != (crc & 0xFFFFFFFF)) {
+			printf("CRC Error, calc crc: %X, rx_crc: %X\n",
+				(crc & 0xFFFFFFFF), rx_crc);
+		}
+#endif
+
+		rb_read++;
+		if (rb_read == rb_size.num_rx_frames)
+			rb_read = 0;
+
+		bytes_transfered += cnt;
+
+		if (bytes_transfered > (100 * 1000000)) {
+			struct timeval finish_time, d_time;
+			float elapsed_seconds;
+
+			gettimeofday(&finish_time, NULL);
+
+			printf("sec = %ld, usec = %ld\n", finish_time.tv_sec, finish_time.tv_usec);
+
+			d_time = delta_time(finish_time, start_time);
+
+			elapsed_seconds = (float)d_time.tv_sec + ((float)d_time.tv_usec * 1e-6f);
+
+			printf("Bytes transfered = %ld, elapsed seconds = %f\n", bytes_transfered, elapsed_seconds);
+			printf("RX data transfer rate = %f K Samples/second\n",
+				(float) bytes_transfered / (float) elapsed_seconds / 4000);
+
+
+			start_time = finish_time;
+			bytes_transfered = 0;
+		}
+	}	
+	return NULL;
+}
+	
+static void *write_thread(void *threadid)
+{
+	int i, tx_pkt_cnt, rb_write;
+	int tx_len;
+	unsigned long crc;
+	unsigned long bytes_transfered;
+	struct timeval start_time;
+	unsigned int pkt_seq = 0;
+	long tid;
+	__u8 *p;
+
+	tid = (long)threadid;
+	printf("Greetings from the write thread(%ld)!\n", tid);
+
+	rb_write = 0;
+	tx_pkt_cnt = 0;
+
+	bytes_transfered = 0;
+	gettimeofday(&start_time, NULL);
+
+	while (1) {
+
+		tx_pkt_cnt++;
+		p = tx_buf + (rb_write * 2048);
+
+//		printf("p = %p\n", p);
+
+		if (packet_data_length > 0)
+			tx_len = packet_data_length;
+		else
+			tx_len = (random() & 0x1ff) + (2044 - 512);
+
+#if 0
+		if (tx_pkt_cnt  == 512) {
+			printf(".");
+			fflush(stdout);
+		}
+		if (tx_pkt_cnt  == 1024) {
+			printf("'");
+			fflush(stdout);
+		}
+		if (tx_pkt_cnt  == 1536) {
+			printf(":");
+			fflush(stdout);
+			tx_pkt_cnt = 0;
+		}
+#endif
+
+//		printf("Checking for space at rb entry = %d\n", rb_write);
+		while (!((*txi)[rb_write].flags & RB_KERNEL)) {
+			struct pollfd pfd;
+			pfd.fd = fp;
+			pfd.events = POLLOUT;
+			poll(&pfd, 1, -1);
+		}
+//		printf("Got space\n");
+
+		for (i=8; i < tx_len-4; i++) {
+			p[i] = i & 0xFF;
+		}
+
+		*(unsigned int *) &p[0] = tx_len-4;
+		*(unsigned int *) &p[4] = pkt_seq;
+
+		pkt_seq++;
+
+		crc = 0xFFFFFFFF;
+		for (i = 0; i < tx_len-4; i++) {
+//			printf("%X ", p[i]);
+			crc = ((crc >> 8) & 0x00FFFFFF) ^
+				crc_tab[(crc ^ p[i]) & 0xFF];
+
+		}
+		*(unsigned int *) &p[tx_len-4] = crc;
+//		printf("\n crc = %lX\n", crc);
+
+		(*txi)[rb_write].len = tx_len;
+		(*txi)[rb_write].flags = RB_USER;
+
+		rb_write++;
+		if (rb_write == rb_size.num_tx_frames)
+			rb_write = 0;
+
+		bytes_transfered += tx_len;
+
+		if (bytes_transfered > (100 * 1000000)) {
+			struct timeval finish_time, d_time;
+			float elapsed_seconds;
+
+			gettimeofday(&finish_time, NULL);
+
+			d_time = delta_time(finish_time, start_time);
+
+			elapsed_seconds = (float)d_time.tv_sec + ((float)d_time.tv_usec * 1e-6f);
+
+			printf("Bytes transfered = %ld, elapsed seconds = %f\n", bytes_transfered, elapsed_seconds);
+			printf("TX data transfer rate = %f K Samples/second\n",
+				(float) bytes_transfered / (float) elapsed_seconds / 4000);
+
+
+			start_time = finish_time;
+			bytes_transfered = 0;
+		}
+
+//		sleep(1);
+	}
+	return NULL;
+}
+
+
+int main(int argc, char *argv[])
+{
+	pthread_t tx, rx;
+	long int t=0;
+	int fpga_config_flag ,decimation;
+	int ret, map_size, page_size;
+	void *rb;
+
+	struct usrp_e_ctl16 d;
+	struct sched_param s = {
+		.sched_priority = 1
+	};
+
+	if (argc < 4) {
+		printf("%s r|w|rw decimation data_size\n", argv[0]);
+		return -1;
+	}
+
+	chksum_crc32_gentab();
+
+	decimation = atoi(argv[2]);
+	packet_data_length = atoi(argv[3]);
+
+	fp = open("/dev/usrp_e0", O_RDWR);
+	printf("fp = %d\n", fp);
+
+	page_size = getpagesize();
+
+	ret = ioctl(fp, USRP_E_GET_RB_INFO, &rb_size);
+
+	map_size = (rb_size.num_pages_rx_flags + rb_size.num_pages_tx_flags) * page_size +
+		(rb_size.num_rx_frames + rb_size.num_tx_frames) * (page_size >> 1);
+
+	rb = mmap(0, map_size, PROT_READ|PROT_WRITE, MAP_SHARED, fp, 0);
+	if (rb == MAP_FAILED) {
+		perror("mmap failed");
+		return -1;
+	}
+
+	printf("rb = %p\n", rb);
+
+	rxi = rb;
+	rx_buf = rb + (rb_size.num_pages_rx_flags * page_size);
+	txi = rb + (rb_size.num_pages_rx_flags * page_size) +
+		(rb_size.num_rx_frames * page_size >> 1);
+	tx_buf = rb + (rb_size.num_pages_rx_flags * page_size) +
+		(rb_size.num_rx_frames * page_size >> 1) +
+		(rb_size.num_pages_tx_flags * page_size);
+
+	fpga_config_flag = (1<<8);
+	if (strcmp(argv[1], "w") == 0)
+		fpga_config_flag |= (1 << 11);
+	else if (strcmp(argv[1], "r") == 0)
+		fpga_config_flag |= (1 << 10);
+	else if (strcmp(argv[1], "rw") == 0)
+		fpga_config_flag |= ((1 << 10) | (1 << 11));
+
+	fpga_config_flag |= decimation;
+
+	d.offset = 14;
+	d.count = 1;
+	d.buf[0] = fpga_config_flag;
+	ioctl(fp, USRP_E_WRITE_CTL16, &d);
+
+	sleep(1); // in case the kernel threads need time to start. FIXME if so
+
+	sched_setscheduler(0, SCHED_RR, &s);
+
+	if (fpga_config_flag & (1 << 10)) {
+		if (pthread_create(&rx, NULL, read_thread, (void *) t)) {
+			printf("Failed to create rx thread\n");
+			exit(-1);
+		}
+	}
+
+	sleep(1);
+
+	if (fpga_config_flag & (1 << 11)) {
+		if (pthread_create(&tx, NULL, write_thread, (void *) t)) {
+			printf("Failed to create tx thread\n");
+			exit(-1);
+		}
+	}
+
+	sleep(10000);
+
+	printf("Done sleeping\n");
+
+	return 0;
+}