From b8a2ec9ddd0ae8039d674f238b234dea568d4317 Mon Sep 17 00:00:00 2001
From: Navid Nikaein <navid.nikaein@eurecom.fr>
Date: Tue, 2 Jun 2015 11:24:12 +0000
Subject: [PATCH] add comments on the bladerf interface
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7516 818b1a75-f10b-46b9-bf7c-635c3b92a50f
---
targets/ARCH/BLADERF/USERSPACE/LIB/bladerf_lib.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/targets/ARCH/BLADERF/USERSPACE/LIB/bladerf_lib.c b/targets/ARCH/BLADERF/USERSPACE/LIB/bladerf_lib.c
index 192c059d22..ef3265db89 100644
--- a/targets/ARCH/BLADERF/USERSPACE/LIB/bladerf_lib.c
+++ b/targets/ARCH/BLADERF/USERSPACE/LIB/bladerf_lib.c
@@ -193,7 +193,7 @@ int openair0_device_init(openair0_device *device, openair0_config_t *openair0_cf
num_buffers = 16;
buffer_size = openair0_cfg[card]. samples_per_packet*sizeof(int32_t); // buffer size = 4096 for sample_len of 1024
num_transfers = 8; // ? device->openair0_cfg.samples_per_packets
- timeout_ms = 1;
+ timeout_ms = 1; // or 0/
printf("the buffer_size is set to %d\n", buffer_size);
@@ -204,22 +204,27 @@ if ((status=bladerf_open(&dev, "")) != 0 ) {
printf("[BRF] device speed is %d\n",bladerf_device_speed(dev) );
// RX
+ // Example of CLI output: RX Frequency: 2539999999Hz
+
if ((status=bladerf_set_frequency(dev, BLADERF_MODULE_RX, openair0_cfg[card].rx_freq[0])) != 0){
fprintf(stderr,"Failed to set RX frequency: %s\n",bladerf_strerror(status));
brf_error(status);
}
+ // RX sample rate: 7680000 0/1
if ((status=bladerf_set_sample_rate(dev, BLADERF_MODULE_RX, openair0_cfg[card].sample_rate, NULL)) != 0){
fprintf(stderr,"Failed to set RX sample rate: %s\n", bladerf_strerror(status));
brf_error(status);
}
+ // RX Bandwidth: 14000000Hz
if ((status=bladerf_set_bandwidth(dev, BLADERF_MODULE_RX, openair0_cfg[card].rx_bw, NULL)) != 0){
fprintf(stderr,"Failed to set RX bandwidth: %s\n", bladerf_strerror(status));
brf_error(status);
}
+ // desired gain = 16
if ((status=bladerf_set_gain(dev, BLADERF_MODULE_RX, openair0_cfg[card].rx_gain[0])) != 0) {
fprintf(stderr,"Failed to set RX gain: %s\n",bladerf_strerror(status));
brf_error(status);
- }
+ }
/* Configure the device's RX module for use with the sync interface.
* SC16 Q11 samples *with* metadata are used. */
--
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