1 files changed, 274 insertions, 0 deletions
diff --git a/host/apps/omap_debug/usrp-e-crc-rw.c b/host/apps/omap_debug/usrp-e-crc-rw.c
new file mode 100644
index 000000000..c3ae45cc1
--- /dev/null
+++ b/host/apps/omap_debug/usrp-e-crc-rw.c
@@ -0,0 +1,274 @@
+#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 "usrp_e.h"
+
+// max length #define PKT_DATA_LENGTH 1016
+static int packet_data_length;
+
+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 = 0xEDB88320L;
+
+	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;
+	}
+
+	return 0;
+}
+
+static void *read_thread(void *threadid)
+{
+	int cnt;
+	struct usrp_transfer_frame *rx_data;
+	int rx_pkt_cnt;
+	int i;
+	unsigned long crc;
+	unsigned int rx_crc;
+	unsigned long bytes_transfered, elapsed_seconds;
+	struct timeval start_time, finish_time;
+
+	__u8 *p;
+	__u32 *pi;
+
+	printf("Greetings from the reading thread!\n");
+
+	// IMPORTANT: must assume max length packet from fpga
+	rx_data = malloc(2048);
+
+	rx_pkt_cnt = 0;
+
+	bytes_transfered = 0;
+	gettimeofday(&start_time, NULL);
+
+	while (1) {
+		
+		cnt = read(fp, rx_data, 2048);
+		if (cnt < 0)
+			printf("Error returned from read: %d\n", cnt);
+
+		rx_pkt_cnt++;
+
+#if 0
+		if (rx_pkt_cnt  == 512) {
+			printf(".");
+			fflush(stdout);
+			rx_pkt_cnt = 0;
+		}
+#endif
+
+		if (rx_data->status & RB_OVERRUN)
+			printf("O");
+
+		printf("rx_data->len = %d\n", rx_data->len);
+
+	
+		crc = 0xFFFFFFFF;
+		for (i = 0; i < rx_data->len - 4; i+=2) {
+			crc = ((crc >> 8) & 0x00FFFFFF) ^
+				crc_tab[(crc ^ rx_data->buf[i+1]) & 0xFF];
+printf("idx = %d, data = %X, crc = %X\n", i, rx_data->buf[i+1],crc);
+			crc = ((crc >> 8) & 0x00FFFFFF) ^
+				crc_tab[(crc ^ rx_data->buf[i]) & 0xFF];
+printf("idx = %d, data = %X, crc = %X\n", i, rx_data->buf[i],crc);
+		}
+
+		p = &rx_data->buf[rx_data->len - 4];
+		pi = (__u32 *) p;
+		rx_crc = *pi;
+
+#if 1
+		printf("rx_data->len = %d\n", rx_data->len);
+		printf("rx_data->status = %d\n", rx_data->status);
+		for (i = 0; i < rx_data->len; i++)
+			printf("idx = %d, data = %X\n", i, rx_data->buf[i]);
+		printf("calc crc = %lX, rx crc = %X\n", crc, rx_crc); 
+		fflush(stdout);
+		break;
+#endif
+
+		if (rx_crc != (crc & 0xFFFFFFFF)) {
+			printf("CRC Error, calc crc: %X, rx_crc: %X\n",
+				(crc & 0xFFFFFFFF), rx_crc);
+		}
+
+		bytes_transfered += rx_data->len;
+
+		if (bytes_transfered > (100 * 1000000)) {
+			gettimeofday(&finish_time, NULL);
+			elapsed_seconds = finish_time.tv_sec - start_time.tv_sec;
+
+			printf("Bytes transfered = %ld, elapsed seconds = %ld\n", bytes_transfered, elapsed_seconds);
+			printf("RX data transfer rate = %f K Samples/second\n",
+				(float) bytes_transfered / (float) elapsed_seconds / 250);
+
+
+			start_time = finish_time;
+			bytes_transfered = 0;
+		}
+	}	
+}
+	
+static void *write_thread(void *threadid)
+{
+	int seq_number, i, cnt, tx_pkt_cnt;
+	int tx_len;
+	unsigned long crc;
+	struct usrp_transfer_frame *tx_data;
+	unsigned long bytes_transfered, elapsed_seconds;
+	struct timeval start_time, finish_time;
+
+	printf("Greetings from the write thread!\n");
+
+	tx_pkt_cnt = 0;
+	tx_data = malloc(2048);
+
+	bytes_transfered = 0;
+	gettimeofday(&start_time, NULL);
+
+	while (1) {
+
+		tx_pkt_cnt++;
+
+#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
+
+		tx_len = 2048 - sizeof(struct usrp_transfer_frame) - sizeof(int);
+		tx_data->len = tx_len + sizeof(int);
+
+		crc = 0xFFFFFFFF;
+		for (i = 0; i < tx_len; i++) {
+			tx_data->buf[i] = i & 0xFF;
+
+			crc = ((crc >> 8) & 0x00FFFFFF) ^
+				crc_tab[(crc ^ tx_data->buf[i]) & 0xFF];
+
+		}
+		*((int *) &tx_data[tx_len]) = crc;
+
+		cnt = write(fp, tx_data, 2048);
+		if (cnt < 0)
+			printf("Error returned from write: %d\n", cnt);
+
+
+		bytes_transfered += tx_data->len;
+
+		if (bytes_transfered > (100 * 1000000)) {
+			gettimeofday(&finish_time, NULL);
+			elapsed_seconds = finish_time.tv_sec - start_time.tv_sec;
+
+			printf("Bytes transfered = %d, elapsed seconds = %d\n", bytes_transfered, elapsed_seconds);
+			printf("TX data transfer rate = %f K Samples/second\n",
+				(float) bytes_transfered / (float) elapsed_seconds / 250);
+
+
+			start_time = finish_time;
+			bytes_transfered = 0;
+		}
+
+//		sleep(1);
+	}
+}
+
+
+int main(int argc, char *argv[])
+{
+	pthread_t tx, rx;
+	long int t;
+	int fpga_config_flag ,decimation;
+	struct usrp_e_ctl16 d;
+	struct sched_param s = {
+		.sched_priority = 1
+	};
+
+	if (argc < 4) {
+		printf("%s t|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);
+
+	fpga_config_flag = 0;
+	if (strcmp(argv[1], "w") == 0)
+		fpga_config_flag |= (1 << 15);
+	else if (strcmp(argv[1], "r") == 0)
+		fpga_config_flag |= (1 << 14);
+	else if (strcmp(argv[1], "rw") == 0)
+		fpga_config_flag |= ((1 << 15) | (1 << 14));
+
+	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 << 14)) {
+		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 << 15)) {
+		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;
+}