nRF5340 with NCS 1.4.0.
I'm using the NUS (code derived from central_uart & peripheral_uart sample) and i'm trying to send longer frame.
I have tried to add the following lines in my proj.conf but I was unsuccessful:
CONFIG_BT_DATA_LEN_UPDATE=y
CONFIG_BT_L2CAP_RX_MTU=247
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_CTLR_TX_BUFFER_SIZE=251
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251
What should i do to allow frame of 251 bytes ?
Edited subject: NCS how to enable DLE -> NCS how to increase NUS max frame size
Hi Nicolas,
The data length update should be executed automatically.
Could you please check in your autoconf.h do you have:
#define CONFIG_BT_AUTO_DATA_LEN_UPDATE 1
#define CONFIG_BT_DATA_LEN_UPDATE 1
I would suggest to try testing with our throughput example.
You can try capture a sniffer trace to make it easier to investigate.
If you want to do it manually you would need to define CONFIG_BT_USER_DATA_LEN_UPDATE and call bt_conn_le_data_len_update() to execute.
Hi Nicolas,
The data length update should be executed automatically.
Could you please check in your autoconf.h do you have:
#define CONFIG_BT_AUTO_DATA_LEN_UPDATE 1
#define CONFIG_BT_DATA_LEN_UPDATE 1
I would suggest to try testing with our throughput example.
You can try capture a sniffer trace to make it easier to investigate.
If you want to do it manually you would need to define CONFIG_BT_USER_DATA_LEN_UPDATE and call bt_conn_le_data_len_update() to execute.
Thanks for the help.
I have tried the throughput example on 2 nRF5340PDK. After minutes the test was still running, seeing in the doc that it took ~4s, there should be a problem with mine.
In the sample there is multiple prj.conf, I tried both but they generated the same autoconf.h and hex file.
The doc say to add for nRF5340 DK:
CONFIG_BT_CTLR_TX_BUFFER_SIZE=251 CONFIG_BT_CTLR_DATA_LENGTH_MAX=251 CONFIG_BT_RX_BUF_LEN=255
but prj.conf has already those definition but even weirder prj_nrf5340dk_nrf5340_cpuapp.conf didn't have 2 of those definitions.
throughput.hexautoconf.hautoconf_hci.h
03.12.2020 17:07:01.233 [RX] - *** Booting Zephyr OS build v2.4.0-ncs1 *** Starting Bluetooth Throughput example Bluetooth initialized Choose device role - type s (slave role) or m (master role): 03.12.2020 17:07:02.260 [RX] - [00:00:00.279,052] [0m<inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)[0m [00:00:00.279,052] [0m<inf> bt_hci_core: HW Variant: nRF53x (0x0003)[0m [00:00:00.279,052] [0m<inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 207.3932 Build 3617359889[0m [00:00:00.281,311] [1;33m<wrn> bt_hci_core: ECC HCI commands not available[0m [00:00:00.281,402] [0m<inf> bt_hci_core: Identity: ea:b6:af:d6:f9:b3 (random)[0m [00:00:00.281,402] [0m<inf> bt_hci_core: HCI: version 5.2 (0x0b) revision 0x2123, manufacturer 0x0059[0m [00:00:00.281,433] [0m<inf> bt_hci_core: LMP: version 5.2 (0x0b) subver 0x2123[0m 03.12.2020 17:07:05.039 [TX] - s 03.12.2020 17:07:05.041 [RX] - Slave role. Starting advertising 03.12.2020 17:07:06.214 [RX] - Connected as slave Conn. interval is 320 units 03.12.2020 17:07:13.417 [RX] - 03.12.2020 17:07:19.817 [RX] - = 03.12.2020 17:07:25.414 [RX] - = 03.12.2020 17:07:30.617 [RX] - = 03.12.2020 17:07:36.215 [RX] - = 03.12.2020 17:07:41.415 [RX] - = 03.12.2020 17:07:48.614 [RX] - = 03.12.2020 17:07:53.815 [RX] - = 03.12.2020 17:07:59.016 [RX] - = 03.12.2020 17:08:04.614 [RX] - = 03.12.2020 17:08:09.814 [RX] - = 03.12.2020 17:08:16.613 [RX] - = 03.12.2020 17:08:21.814 [RX] - = 03.12.2020 17:08:27.014 [RX] - = 03.12.2020 17:08:32.611 [RX] - = 03.12.2020 17:08:37.813 [RX] - = 03.12.2020 17:08:44.613 [RX] - = 03.12.2020 17:08:50.211 [RX] - = 03.12.2020 17:08:55.412 [RX] - = 03.12.2020 17:09:00.613 [RX] - = 03.12.2020 17:09:06.210 [RX] - = 03.12.2020 17:09:12.611 [RX] - = 03.12.2020 17:09:18.210 [RX] - = 03.12.2020 17:09:23.410 [RX] - = 03.12.2020 17:09:28.611 [RX] - = 03.12.2020 17:09:34.211 [RX] - = 03.12.2020 17:09:41.010 [RX] - = 03.12.2020 17:09:46.610 [RX] - = 03.12.2020 17:09:52.208 [RX] - = 03.12.2020 17:09:57.809 [RX] - = 03.12.2020 17:10:03.009 [RX] - = 03.12.2020 17:10:09.808 [RX] - = 03.12.2020 17:10:15.408 [RX] - = 03.12.2020 17:10:21.007 [RX] - = 03.12.2020 17:10:26.208 [RX] - = 03.12.2020 17:10:31.806 [RX] - = 03.12.2020 17:10:38.208 [RX] - = 03.12.2020 17:10:43.806 [RX] - = 03.12.2020 17:10:49.006 [RX] - = 03.12.2020 17:10:54.207 [RX] - = 03.12.2020 17:10:59.805 [RX] - = 03.12.2020 17:11:06.206 [RX] - = 03.12.2020 17:11:11.805 [RX] - = 03.12.2020 17:11:17.005 [RX] - = 03.12.2020 17:11:22.206 [RX] - = 03.12.2020 17:11:27.804 [RX] - = 03.12.2020 17:11:34.205 [RX] - = 03.12.2020 17:11:39.803 [RX] - = 03.12.2020 17:11:45.004 [RX] - = 03.12.2020 17:11:50.204 [RX] - = 03.12.2020 17:11:55.803 [RX] - = 03.12.2020 17:12:02.604 [RX] - = 03.12.2020 17:12:08.202 [RX] - = 03.12.2020 17:12:13.404 [RX] - =
03.12.2020 17:07:01.229 [RX] - *** Booting Zephyr OS build v2.4.0-ncs1 *** Starting Bluetooth Throughput example Bluetooth initialized Choose device role - type s (slave role) or m (master role): 03.12.2020 17:07:02.253 [RX] - [00:00:00.280,975] [0m<inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)[0m [00:00:00.280,975] [0m<inf> bt_hci_core: HW Variant: nRF53x (0x0003)[0m [00:00:00.280,975] [0m<inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 207.3932 Build 3617359889[0m [00:00:00.283,325] [1;33m<wrn> bt_hci_core: ECC HCI commands not available[0m [00:00:00.283,386] [0m<inf> bt_hci_core: Identity: e6:a7:8c:4b:48:5c (random)[0m [00:00:00.283,416] [0m<inf> bt_hci_core: HCI: version 5.2 (0x0b) revision 0x2123, manufacturer 0x0059[0m [00:00:00.283,416] [0m<inf> bt_hci_core: LMP: version 5.2 (0x0b) subver 0x2123[0m 03.12.2020 17:07:06.030 [TX] - m 03.12.2020 17:07:06.032 [RX] - Master role. Starting scanning Filter not match. Address: 5e:fb:d8:ec:e3:2b (random) connectable: 0 Filter not match. Address: ec:81:93:15:34:cf (public) connectable: 1 Filter not match. Address: 4a:03:aa:76:1b:7f (random) connectable: 0 Filters matched. Address: ea:b6:af:d6:f9:b3 (random) connectable: 1 Filter not match. Address: ec:81:93:59:40:34 (public) connectable: 1 03.12.2020 17:07:06.214 [RX] - Connected as master Conn. interval is 320 units 03.12.2020 17:07:10.216 [RX] - Service discovery completed MTU exchange pending 03.12.2020 17:07:11.016 [RX] - MTU exchange successful Ready, press any key to start 03.12.2020 17:07:13.118 [TX] - 03.12.2020 17:07:13.120 [RX] - 03.12.2020 17:07:14.217 [RX] - 03.12.2020 17:07:15.417 [RX] - 03.12.2020 17:07:18.217 [RX] - 03.12.2020 17:07:19.416 [RX] - 03.12.2020 17:07:21.017 [RX] - 03.12.2020 17:07:22.216 [RX] - 03.12.2020 17:07:23.417 [RX] - 03.12.2020 17:07:25.017 [RX] - 03.12.2020 17:07:26.216 [RX] - 03.12.2020 17:07:27.416 [RX] - 03.12.2020 17:07:29.016 [RX] - 03.12.2020 17:07:30.216 [RX] - 03.12.2020 17:07:31.816 [RX] - 03.12.2020 17:07:33.016 [RX] - 03.12.2020 17:07:34.216 [RX] - 03.12.2020 17:07:35.816 [RX] - 03.12.2020 17:07:37.015 [RX] - 03.12.2020 17:07:38.216 [RX] - 03.12.2020 17:07:39.816 [RX] - 03.12.2020 17:07:41.015 [RX] - 03.12.2020 17:07:42.216 [RX] - 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Hi Nicolas,
Sorry for late reply. Have you made sure you updated CONFIG_BT_CTLR_TX_BUFFER_SIZE and CONFIG_BT_CTLR_DATA_LENGTH_MAX to the hci_rpmsg sample that you flash to the netcore of the nRF53 ?
It's described here.
In my test here I got an memory overflow when compiling with
CONFIG_BT_CTLR_TX_BUFFER_SIZE=251 CONFIG_BT_CTLR_DATA_LENGTH_MAX=251
But if I do
CONFIG_BT_CTLR_TX_BUFFER_SIZE=251
CONFIG_BT_CTLR_DATA_LENGTH_MAX=200
it worked. I will look into why it doesn't compile with DLE =251 but 200 should be good enough for testing.
Update: it was because CONFIG_BT_MAX_CONN was 16 in the hci_rpmsg , if you set it to 2 you can compile with
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251.
Thank you, now the throughput sample work correctly for me.
But why this sample generated a hci_rpmsg.hex that is not correct for him ? It would be better to not generated at all because it's misleading for people like me.
Now I will try with my code.
Hi Nicolas,
I guess we just simple build and generate the default hci_rmpsg project without having any special overlay for the configuration. This is something we can improve.
My NUS code is now working with longer frame. Here is the modification I have done to make this works:
Using hci_rpmsg with the added conf:
CONFIG_BT_CTLR_TX_BUFFER_SIZE=251 CONFIG_BT_CTLR_DATA_LENGTH_MAX=251 CONFIG_BT_MAX_CONN=8
Added to central and peripheral conf:
CONFIG_BT_L2CAP_TX_MTU=247 CONFIG_BT_L2CAP_RX_MTU=247
Added a call to bt_gatt_exchange_mtu() in the central code:
static void exchange_func(struct bt_conn *conn, uint8_t att_err,
struct bt_gatt_exchange_params *params)
{
struct bt_conn_info info = {0};
int err;
LOG_INF("MTU exchange %s", att_err == 0 ? "successful" : "failed");
err = bt_conn_get_info(conn, &info);
if (err) {
LOG_ERR("Failed to get connection info %d", err);
}
}
static void discovery_complete(struct bt_gatt_dm *dm, void *context)
{
struct bt_nus_client *nus = context;
LOG_INF("Service discovery completed");
bt_gatt_dm_data_print(dm);
bt_nus_handles_assign(dm, nus);
bt_nus_subscribe_receive(nus);
bt_gatt_dm_data_release(dm);
exchange_params.func = exchange_func;
int err = bt_gatt_exchange_mtu(default_conn, &exchange_params);
if (err) {
LOG_ERR("MTU exchange failed (err %d)", err);
} else {
LOG_INF("MTU exchange pending");
}
}