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Hello,I would like to implement the M24SR02 in my design, with an NFC antenna.The problem is that, in order to have a resonant frequency of 14.2MHz, the inductance of the NFC antenna needs to be around 5µH in order to resonate with the 25pF capacitance inside the M24SR02, but this value of inductance is difficult to reach with a small size antenna (<10mm).Is it possible to add a capacitor between AC0 and AC1 pin, or two capacitors between the ACx pins and the ground, in order to make the capacitance higher, which will make the needed inductance of the antenna lower, and thus allows me to use a smaller antenna ?Best regards,Guillaume

I am working on M24Sr64-Y chip. I am able to read Chip using I2C as per application note AN4433. But in that application note there is nothing mentioned about writing to the NFC chip using I2C. So I followed commands as for RF writing,Because Reading commands for both are same.Now I want to know in which format it writes the data in chip? If I write '1' to the chip, it shows one extra byte '0x05' in memory before '1'. What does that byte mean?What procedure to follow for writing into the tag in NDEF format?

Hi everyone,I'm having troubles with the internal ADC (STM32F072CBTX): a significant offset is present in the values provided by the converter. I performed a set of test measurments on the ADC: the results are shown in Table1.jpg.Where:Vmis is the voltage measured with a voltage meter at the ADC input pin (voltage drop on a resistor, in a voltage divider).ADC is the value produced by the converter.Vcalc is the correspondent voltage value with 12 bits resolution: Vcalc = Vmis * ADC / 4096Err = Vmis - VcalcThe values reported in the table of which above have been obtained with the following conditions:VDDA = 3.3VVSSA = 0VNo autocalibrationI tried autocalibration as well, by calling HAL_ADCEx_Calibration_Start before starting conversions: strangely, with autocalibration, things get even worse, as shown in Table2.jpg.Does anyone have any idea on what is going on?Am I doing something wrong?Any help is appreciated.Thanks.Marco

Hi,I am using Keil V5.26.2.0. Although I have installed DFP for my particular MCU, from where I may get bsp for my board. Please be gentle guys, I am pretty new to the world of MCUs.Cheers and a happy dayTahir

Posted on August 01, 2017 at 16:03Hi ForumI'm trying to implement USART Rx of variable, unknown length messages at a 1Mbps baud rate through DMA. I would like to minimize the latency from receiving to consuming the data, so I'm trying to do this with some sort of idle detection as opposed to having my consumer code periodically drain a buffer.I can attach my code if necessary, but for right now I'm mostly looking for high-level answers on how this is best accomplished to make sure I'm on the right track.My first attempt was to configure a buffer in DMA and enable the USART IDLE interrupt. In the USART interrupt handler, I first disable DMA (and wait for the enable bit to clear on the DMA stream) and then clear the IDLE flag (by reading the bit and then reading the data register). I copy the data out of the DMA buffer and then re-enable DMA in the interrupt to be ready for the next message.Doing this gets mixed results -- I do get valid packets occasionally, but most often my received

Hi , I encountered an interesting problem while I was trying to calculate the Bit-Banding Address of GPIO registers .The peripherals working on AHB2 and AHB3 busses are overflowing when trying to calculate their bit-banding map .. For Example ;I wanted to ease the syntax of reading some IO pins and here is the result for GPIOA , IDR register..--------------------------------------------------------------------------------------PERIPH_BASE =0x40000000Address offset of IDR is = 0x10AHB2PERIPH_BASE=(PERIPH_BASE + 0x08000000)GPIOA_BASE =(AHB2PERIPH_BASE + 0x00000000)GPIOA_BASE=0x48000000---------------------------------------------------------------------------------------For GPIOA_IDR_Bit0;GPIOA_IDR_Bit0=0x42000000 + ((GPIOA_BASE +0x10-0x40000000)*0x20);GPIOA_IDR_Bit0=0x142000200 .... Which is out of 0x42000000 -- 0x43FFFFFF Range !Is there something I misinterpret ? or This is the reality of bit-banding exception such that doesn't work on some peripherals ... ?? Please tell me

Hi,It says on page 107 of stm32f777bit6 manual that:"Each OTP data block can be programmed until the value 0x00 is programmed in the corresponding OTP lock byte."I understand that OTP is supposed to be one time programmable but the above statement seems to imply that I can reprogram the OTP data until I write 0x00 in the lock byte.I haven't programmed the lock byte but I cannot reprogram the OTP. I used these commands: HAL_FLASH_Unlock(); __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_WRPERR); HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, 0x1FF0F3A0, 0x55555555); HAL_FLASH_Lock();It worked the first time but if I change 0x55555555 it doesn't write the new value.So what's the problem? And if the OTP is only one time programmable then why create a separate lock-byte if you can't reprogram it anyway?Thanks

I am using a STM32H7 USB in MSC mode. When I generate the source code with STM32CUBEMX 4.26.1 and STM32CubeH7 Firmware Package V1.3.0 / 04-July-2018, i noticed that inside USBD_HS_USR_BOSDescriptor() in usbd_desc.c, USBD_HS_BOSDesc definition can not be found. Looks like USBD_HS_BOSDesc is not defined anywhere in code

Hello there,I am using this shield:https://www.st.com/en/ecosystems/x-nucleo-nfc05a1.htmlConnected to the Nucleo64 L476RG board.I wanted to utilize this demo:https://www.st.com/content/st_com/en/products/embedded-software/st25-nfc-rfid-software/x-cube-nfc5.htmlThe problem was that there is the source code generated by CubeMX provided, without the actual CubeMX project available. Because of that, instead of generating code from CubeMx, I had to generate CubeMx project from code by hand. I have placed the whole project here in case anyone needs that:https://github.com/bremenpl/NFC5The project works and the demo reads some data from a tag placed on the PCB antenna.I need to read the tags memory (that 256 bytes of data) but I dont know how to do that. In the demo, there are a lot of hardcoded variables and the whole architecture is merely readable. After a while I found out that in this function the data is exchanged:demo.c:/*! *************************************************************

I am currently working on an embedded firmware development which uses FreeRTOS running on an STM32F777II microcontroller. Resource wise, I have around 10 tasks (total sum of stack size will be under 40 KByte) at the same priority, around 4 queues of 1KByte each, 4 binary semaphores. I know this would be an incomplete question without posting the actual code, but I really do not have any specific portion in my firmware that I think will be worth sharing related to my issue. I have a ton of business logic in my code which I cannot fully share as well.I have a struct which consists of multiple char and int arrays of a specific length. 4 of the tasks uses these structures each. Each structure consumes around 15KByte of space and is defined in the global space of the FreeRTOS environment, not local to a task. The structs are allocated statically only and not dynamically on runtime. And since I initialize few members of the struct when declaring, so they go to the .data section only if I am

Hello,can ADC3 be programmed in independant mode if ADC1 and ADC2 are programmed in Dual regular simultaneous mode ?(in CubeMX with STM32F205 , the menu independant mode can't be selected for ADC3 if the menu Dual regular simultaneous mode is selected for ADC1 and ADC2)thanksbest regards

I am using a STM32H7 ADC in multimode. When I generate the source code with STM32CUBEMX 4.26.1 and STM32CubeH7 Firmware Package V1.3.0 / 04-July-2018, i noticed that inside MX_ADC1_Init() in main.c, the following line of code is written:multimode.DualModeData = ADC_DMAACCESSMODE_DISABLED;which is throwing compile time exception.As I understand it should bemultimode.DualModeData = ADC_DUALMODEDATAFORMAT_DISABLED;Also I noticed that STM32CubeMX IDE is showing "DMA Access Mode" on the second line in ADCs_Common_Settings which is probably is root cause of this issue

Hello,I'm using a STM32L031G6U7 in a new product design, but when I try to program it using the flash loader released by ST(STMFlashLoader v 2.8.0) the flash map(STmap) for this processor is not there. I'm missing something or this release doesn't support this processor? In that case are there any other solutions for uart programming?

I am using the stm32f0discovery development board, I want user manual for stm32f0xx firmware library. can you please share the link

Hi, I'm looking for the CR95HF library code, which is described in the application note AN3375. Unfortunately I couldn't find it anywhere. Can somebody please point me into the right direction!? :folded_hands:

Posted on January 26, 2018 at 16:55Hi there,we are currently developing the firmware for our custom board with an STM32F746 MCU in LQFP-100 package. Our current version is working well and now we want to be able to download updates via USB DFU. I read many posts and the related documents from ST, so there might be some ways to realize this. Unfortunately, in either way we get stuck on  choosing the right addresses or verifying code with DfuSe. My favorite way is the following in which we jump to the internal bootloader:&sharpdefine SYS_MEM_ADD                              0x1FF00000 //Disables the RCC (reset setting)HAL_RCC_DeInit();SysTick->CTRL = 0;SysTick->LOAD = 0;SysTick->VAL = 0;// disables every IRQ__disable_irq();// remap system memory to 0x0000 0000SYSCFG->MEMRMP = 0x01;JumpToApplication = (void (*)(void)) (*((uint32_t *)(SYS_MEM_ADD + 4))); __set_MSP(*(__IO uint32_t*) SY

i am beginner with stm32 so please suggest which one is better or any other low cost module following are link 1) http://www.dnatechindia.com/Development-Board/STM32-development-boards/STM32F0308-Nucleo.html2) http://www.dnatechindia.com/Development-Board/STM32-development-boards/stm32f0308-discovery.htmlsuggestion are welcome an thanks in adavnce

Hello.My MCU does not work. I guess it is oscillator problem.- PF1 pin of STM32F373RC is low even though 3.3V power is supplied to MCU, so 8Mhz oscillator does not work. - The oscillator has internal capacitors and part number is "CSTNE8M00G550000R0"- I designed this circuit board. I used MCUs of Atmel, TI and Microchip for several years but this is first time to use STM32 MCU.- I checked 3.3V power is normal and NRST pin value is HIGH.- There is no other oscillator for LSEDid I make a mistake?Please let me know some way how can I check this issue.Attached image is oscillator part of my circuit.

I'm trying to erase a single page of flash memory at 0x0800F800 (on a 64kB STM32F103C8T6) by using the following code, which runs from RAM:while(FLASH->SR & FLASH_SR_BSY); FLASH->CR = FLASH_CR_PER; FLASH->AR = 0x0800F800; FLASH->CR |= FLASH_CR_STRT; while (!(FLASH->SR & FLASH_SR_EOP)); FLASH->SR = FLASH_SR_EOP; FLASH->CR &= ~FLASH_CR_PER;The problem I am facing is that EOP is never set to 1, as well as BSY flag in FLASH_CR is never set to 0. The erase procedure hangs indefinitely, and when this code was previously executed from flash (not RAM), it also caused a full lock-up of the MCU with inaccessible SWD debugging.I tend to think that this might be a hardware failure of my specific MCU. However, what makes me doubt about it is that mass erase and/or page erase, flash programming and verification all works from OpenOCD and ST-Link Utility when the MCU is reset and halted prior to trying to execute flash operations in firmware.What could possibly cause

Hello,In the RM0433 (rev 3) the DBGMCU_APB4FZ1 offset is incorrectly marked in the detail section.It is 0x04C and should be 0x054.The register summary is correct. But if somebody is using the detail section - can make an error.BTW: What does the LS stand for in WDGLSD1 (related to other question I posted)?

I have installed VCP_V1.5.0 Setup for Windows 7 and 8, but neither works. Please help. Is there a separate driver for Windows 10?

Hi,Has anyone successfully used sensortile(soldered on small cradle) with Unicleo GUI ? If yes which firmware should be used to interface sensortile with Unicleo GUI ? In "Release Note for X-CUBE-MEMS1 Software for STM32, Expansion for STM32Cube" support for sensortile is mentioned as follows :Projects X-CUBE-MEMS1 Examples for SensorTile V4.3.0 (release notes) But I could not find this particular firmware in the firmware package(X-CUBE-MEMS1 ) .What am I missing ? Any help on above would be appreciated.Thanks.

Hi gent'ssorry: my first post here, hope everything goes well.I would like to redesign an antenna for an 95HF, today for test, we use a Nucleo board and it's working pretty well; but I think we can do better.We need to read 2 tags: one on the Wafer Pod case; one inside the case, on the cassette. distances are in the range of 10cm but unfortunatelly tag inside Pod is prety at 90°.I read carefully AN3394 and think I basicaly understood what I should do to adapt impedances;but now I have to design my antenna according also to the space I have in front...I saw ther is a 'simplified software tool' (antenne.exe) but I was not able to find it for download.Any comment, help is welcomme.Thanks and regardsJMI

Upgraded ST-Link to V2.J29.M18 STM32 Debug+Mass storage.STM32 ST-LINK Utility is v4.2.0.0 USBDriver v5.0.3.0 CLI.exe v3.2.0.0Removed both ST link jumpers .Fresh CR2032 battery installed on STEVAL-SmarTag1Connected directly on SWD (pin 1 correctly aligned)Message Can not connect to target!ST-Link V2 is connected to Nucleo L476 board.ST-Link does connect to this board when ST-links reinstalled.I have also tried a separated ST-Link V2. Also no connection to SmartTag1How do I connect to the STEVAL-SmarTag1 to change firmware from default?

Just upgraded to 5.8.0 (the ONLY and LAST available version on ST website), and we ran into a lot of troubles. First of all, SPC5STUDIO updates URL had to be fixed because of the lack of trailing "/". Once fixed, we're still unable to install/update/download anything because of a 404 error. Who's the guy in charge of tests ?Before replying by a "please update to 5.8.1", be aware that there's no "5.8.1" version available at the ST website :Where's that 5.8.1 ? Please provide a link asap since we're stuck.eclipse.buildId=unknown java.version=1.8.0_91 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=fr_FR Command-line arguments: -os win32 -ws win32 -arch x86   org.eclipse.epp.mpc.core Info Thu Sep 20 12:53:08 CEST 2018 Cannot parse XML at URL http://vps182808.ovh.net:8080/marketplace/news/api/p?client=org.eclipse.epp.mpc.core&client.version=1.5.0.v20160608-1457&os=win32&ws=win32&nl=fr_FR&java.version=1.8.0_91&product=com.st