Interface and connectivity ICs

I have ported the BLE_Throughput_EXT example for two MCU/BlueNRG2(DTM) setups to communicate with each other. I was getting around 34 kbps. When I implemented this example on a single setup and configured it to send out Notifications when connected to a simple BLE app on an iPhone, I was getting a little under 60 kbps. After disabling notifications on the iPhone while maintaining the previous connection. The MCU/BlueNRG2(DTM) setup begins transmitting at about 270 kbps. I was hoping someone could explain what is going on. I am trying to squeeze out as much throughput as I can with this setup and was wondering if I may be doing something wrong or if this is the transmission rate to be expected.

Doesn't the BLE specification already include a 3-byte link layer CRC field? Is this just for extra precaution when dealing with delicate firmware data?

Right at the moment I have 2 X-NUCELO WIFI expansion board, X-NUCLEO-IDW01M1 & X-NUCLEO-IDW04A1. I am pretty confused, which one to use for an NUCLEO-144 STM32-Cortex M4 ?Is there any difference between the 2 boards?Which one is easy to manipulate?thanks

I have a device sending notifications to a BlueNRG-2 Eval board (STEVAL-IDB008V2) configured as central/master. I modified the script file ATT_MTU_extended_packet_len_Master_Security.py to work with my device. Everything works until I receive a notification with an ACI_GATT_NOTIFICATION_EVENT. I try to extract the data in the Attribute_Value with Python but only get Python error messages.From the error messages, the 53 byte notification does not appear to be a list or byte array or any other iterable type. The best I can figure out is that it thinks it is an integer!! A 53 byte integer. I wasted a couple of days on this until I found the GET_LIST function in the BlueNRG GUI User Manual.I'd like to avoid wasting my time like this again. Is there documentation on the Python data types for Bluetooth events?

Is there more documentation somewhere for the BlueNRG GUI Script Utility commands? There is just a table in document UM2058 with very little detail. One has to guess and use the error messages from Python to try to figure out the command parameters and figure out the return values and what the commands do.

Hello,I have a few questions regarding the use of the BlueNRG-2 deviceI am building a system where I have to send small data packets (10 bytes) from 1 unit to 10+ units. I am aware that you can only have 7 simultaneous connections, but I am wondering if there is a way to broadcast this information, and have anything that is within range receive and interpret the data. -if so, does anyone happen to have a code sample they would be willing to share?Do you need an antenna for BLE to function? The range only needs to be about 5-10ft. Other than the BlueNRG-2 module, is there any supporting circuitry that is necessary for functionality? I need this to fit on a PCB that is 12mm x 12mm so space is very limitedThanks in advance

Hello,we would like to add a charge functionality via USB PD for an USB hub. Charging should be possible for the upstream port, e.g. the host shall be charged. The tricky part is, that the charge process has to be activated and deactivated during runtime (it is a battery powered application) without interrupting the USB data communication. Is this possible with the STUSB4700/STUSB4710 ICs? If yes, what's the best way to do this? Delete all power data objects in the beginning and reconfigure them during runtime? Or is there a better way? Unfortunately we have no experience with USB PD so far and we really appreciate any help.Thanks in advance and best regards

Good morning, I am working with a nucleo-l476RG board and the expansion board x-nucleo-idw01m1. I'd like to know where can I find the image to flash on the SPWF01SA through the FW upgrading over UART example.ThanksCarlo Delbono

Title somewhat covers it,I have a custom circuit based off the Blue Tile eval kit BCN002V1 board. I'm trying to flash it with the host board and the BLE_SensorDemo.hex but I'm not seeing the board pop up in the comm ports when I connect it like I would the tile. Unfortunately I don't have much more info than that. I guess my question would be is there something preloaded that allows the communication with the blue tile? Or can one communicate from a newly assembled board? Thanks in advance!

Hello Support,We selected the following TPM to design into a new product and chose the ST33HTPH20xxAHC3 part for the design. The product is a specialized Android tablet that is mounted outside conference rooms for room scheduling. We are now entering production, and with our first production run we are seeing TPM errors. Upon inspection, we found that our production run is using the same part number TPM, but it now has a 'V2' marked on the IC (see the picture at the bottom). In addition, we found the FW in the IC changed from 74.9 to 74.65. We are using the android debugger (adb) command tpm_test -g and it will sometimes return the TPM properties, and between 5% and 60% of the time (depending on the particular device), it returns an error as shown in the picture below.We would highly appreciate any information about this IC version change and FW change and help resolving this issue as our manufacturing is stopped until we have resolution. Is there a corres

I am trying to do a file transfer over ble, using 20 byte characteristics writes. I did notice that, following a write command for characteristic, the resultant aci_gatt_attribute_modified_event() doesnt get called quick enough to process the next incoming messages. (bluenrg1_events.h version V1.0.0)Herein I saw the following times the response for the write message takes 1-3 ms to me sent over to the receiver the consequent procedure complete call takes over 10- 20 ms to be received by the receiver. The blunrg1 is running at 32000000Hz. I have the following svc & characteristics details services added 4, total characteristics -13 (1+4+4+4).Also, I timed the function in the main loop running the BTLE_StackTick() &  APP_Tick() and their time utilization seems to me less than a 1ms. Is there any way the responsiveness if the stack could be increased/ optimized?Please let me know if you have any questions,

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I've been trying for some time now to get my F767ZI writing to an ILI9341 8080 LCD.The equations detailed in the AN2790 datasheet:(1) DATASET*tHCLK = tWP(2) ((ADDSET+1) + (DATASET+1))*tHCLK >= MAX(tWC)(3) DATASET >= ((tAVQV + tsu(Data_NE) + tv(A_NE))/tHCLK) - ADDSET - 4I am not super confident I am applying all these equations properly, though.My system is running at 168MHz (tHCLK = 5.95ns).Here's the data for 8080 timings for the ILI9341 (found on page 226 of the ILI9341 datasheet):tWC >= 66nstWRL (write low pulse width) = tWRH (write high pulse width) >= 15nstRAT (read access time) <= 40nsAnd here's some data for the values in (3) that I found from here(https://www.st.com/resource/en/datasheet/stm32f767zi.pdf:(tv(A_NE) = 0tsu(Data_NE) >= tHCLK - 1Assumptions:tWP = tWRL = tWRHtAVQV = tRAT = 40ns (??)I can't find tAVQV anywhere. It's defined as "address valid to output valid time", but I'm not sure where to deduce that. I'm using "read access time" right now as a fill

I am developing a custom board in which I want to interface a BLE chip and for that, I am looking forward to using BlueNRG-2 in my design. From what I have studied online BlueNRG chips support only SPI based interface with the Host controller. The programming guide says that the chips do support the UART interface with the Host but there is not much details about it anywhere else.I want to know whether the chip support standard HCI interface over UART or not? If yes, then is there any document available for interfacing.Hoping for a reply as soon as possible so that I can finalize my design.

Hello,In the "Interfaces and Transceivers > USB > USB Type-C and Power Delivery Controllers" STUSB4761 [Part No. STUSB4761QTR] is showing it is not available for ordering.May I know the reason Why? and When? will it be available for ordering

I'm using the IAR(8.40.1) for flashing the code(Lightning_demo from stsw-bnrg-mesh package) using stlink. After pressing the download and debug icon i'm facing User error: Reset failed.But while flashing with BlueNRG1 ST-Link Utility, I was able to flash the code success fully.At the same time if press on the debug without downloading then i was seeing fatal error: ST-Link, No MCU device found. Could u please help me to resolve the issue.

I want to know the flash and RAM utilization by BlueNRG-2 BLE stack for various GAP roles. I am planning to use the BlueNRG-M2SP module for my application.

Hi!I have a STM32F765ZITx as master and a STM32F051C8Tx board as slave that im trying to communicated with each other over IrDa. The master is sending 6 bytes (2 startbytes, 1 length of data byte, 1 databyte, 2 checksum bytes) to the slave, which works as a request that the slave is going to transmit back to master a standard reply message containing 14 bytes of data (19 byte including header and checksum). Master transmits every 100ms. My problem is that the slave is receiving the correct header every two samples. This is the situation:sample 1: 254 251 1sample 2: 0 251 1sample 3: 254 251 1 sample 4: 0 251 1sample 5: 254 251 1  .  .  .So the slave is transmitting the standard reply back every two samples. Here is my init of IrDA on both boards:static void MX_USART1_IRDA_Init(void) { hirda1.Instance = USART1; hirda1.Init.BaudRate = 9600; hirda1.Init.WordLength = IRDA_WORDLENGTH_8B; hirda1.Init.Parity = IRDA_PARITY_NONE; hirda1

I use a RTC IC M41T83 in our prototypes and can access this RTC via I2C bus (reading and setting timestamps). Unfortunately the crystal does not start. At startup I set the ST bit to 1 (write address and write a byte via I2C) and then I set the bit to 0 again (write address and write a byte via I2C). But the crystal does not react, I have a 32kHZ crystal and a 32.768 kHz) tested with suitable capacitors 12 or 12.5 p. When I read out the flag OF afterwards it is also on (1).At the power pin and also at the battery pin (via 1k Ohm resistor) a stable operating voltage of 3V3 is available.Unfortunately I can't recognize any faults on HW and SW and I wanted to ask you if you have a sample code for implementation or if I missed a relevant point. Kindly thank you for your help with best regards from Hamburg,Thomas Bender

In hosted mode SPI or UART interfaces only noted in datasheet. But in my MCU i have I2C port only available. Looking forward your response ASAP!Thanks in advance

Hi sir/Madam,If we flashed BlueNRG2_Lighting_Demo.bin file using USB micro in STEVAL_IDB008V2 board it was provisioned. If we give commands from models, board doesn't show any change in the led, why? So that we unprovisioned node and tried to provision the node again but we are not able see those networks again in mesh app why?. could u please tell us why it is happening this way? Why it not showing ble networks in app second time?

I am using BlueNRG-Tile chip. I am configuring it as a server. And i am using ST BLE Sensor App as a master. In that i am getting all the services and characteristics displayed on App ,which I have configured at server side. My target is to get notifications of different characteristics at master side simultaneously. But I am observing that i am getting notification from one characteristic only. To get notification from another characteristic i have to disable another characteristic's descriptor. So, can you please clarify me that it is limitation of BlueNRG-Tile OR something I am missing from code side. If I am missing from code side then please let me know how to resolve it.

Sorry if this is a dumb question. I have a Nucleo F767ZI, and I want to wire it to this: http://www.lcdwiki.com/2.8inch_Arduino_Display.There's a tutorial here on how to set up LTDC with an ILI9341 here: http://www.lucadavidian.com/2017/10/02/stm32-using-the-ltdc-display-controller/. But it kind of glosses over the wiring of the board pins to the display. It looks like the blogger used a Discovery board.Am I just out of luck with my particular shield that (for some reason) there's only 8 total LCD data pins, rather than 8 for each color? Would I need to send R, G and B data along the same buffer with this shield?

Hi,I really appreciate the reactivity of the forum, thanks a lot.i have some questions:1- When i enable/disable LDC mode using S2LPTimerLdcrMode, and S2LpTimerFastRxTermTimer, i need to run command S2LPCmdStrobeReady and S2LPCmdStrobeRx after each enable and disable?2- When i have TX_FIFO_ERROR, i need only to run S2LPCmdStrobeFlushTxFifo, S2LPCmdStrobeReady, S2LPCmdStrobeRx (last two command to prepare S2LP fo RX)?3- Sometime i have IRQ status 0.0.0.0 what does't mean? Is't a problem of collision, because i see this problem when S2LP try to send message and a new message is received?4- when i use mechanism of Infinite preamble as described in application note Sniff Mode application (and my chip is also in LDC mode) how i will be sure that the receiver will be wakeup? in other word, how i will be sure that my msg (not the msg of infinite preamble but the real msg) will be in the Fast RX timer of the receiver?Thanks in advance.