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Posted on July 12, 2017 at 04:50 Hi, following scenario: I use one SD card on my pcb (4 wire sdio) with fatfs and FreeRTOS. The generated driver init function from ST looks like following (ff_gen_drv.c): uint8_t FATFS_LinkDriverEx(Diskio_drvTypeDef *drv, char *path, uint8_t lun) { uint8_t ret = 1; uint8_t DiskNum = 0; if(disk.nbr <= _VOLUMES) { disk.is_initialized[disk.nbr] = 0; disk.drv[disk.nbr] = drv; disk.lun[disk.nbr] = lun; DiskNum = disk.nbr++; path[0] = DiskNum + '0'; path[1] = ':'; path[2] = '/'; path[3] = 0; ret = 0; } return ret; }�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�? Situation: I have an exti interrupt on the SD_Detect pin of the socket to dynamically (de-)init the driver whenever the SD card is (un-)plugged. On unplug, I call: uint8_t SD_Deinit(void) { uint8_t retval = FAT_unmount_SD(); return retval | FATFS_UnLinkDriver((const TCHAR*) SD_Path); }�?�?�?�? On plugging in, I call (HAL_SDIO_PowerOff/On controls power supply pin

Posted on July 11, 2017 at 18:17Hello fellow STM32 explorersI am currently working on a STM32F4 TCP/IP project.I'm using LwIP's RAW api.I got a echo UDP program working but with a static IP now I'm trying to get an ip adress automatically using a DHCP.I have enabled DHCP but when pluging my board (via a PHY) to my PC I do not see any ip resquest on Wireshark.Are there any other steps that need to be made in my code for DHCP to work ?Any help is welcommed ,Feel free to give suggestions/hints.Have a nice day-Andy #dhcp #stm32f4-discovery #lwip #stm32f4

Posted on July 12, 2017 at 07:55I'm confused about wether STM32L471RG has a USB bootloader or not. AN2606 describes an STM32L47xxx DFU bootloader and that USB DM and USB DP lines should be connected to PA11 and PA12 respectively.But what confuses me is that no USB FS DM/DP line is described on PA11/12 nor USB capabilities in STM32L471RG datasheet.#stm32l4-usb #usb-bootloader #dfu #stm32l471 #dfu-bootloader

Posted on March 09, 2017 at 03:36when generating code for an stm32f769i-discovery with rcc set to enable external clock, the latest version does this:  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSE;which causes a fault when it hits HAL_RCC_OscConfig(). the fix, and the behavior in previous versions, is to not try to choose both clocks at once. RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;

Posted on July 10, 2017 at 18:49Can anyone confirm what the Flash sector sizes are on this MCU version?All documentation lumps the F411xC with the F411xE even though the former has 256kB of flash, and the latter has 512kB. The stm32f4xx_hal_flash_ex header defines the same number of sectors as the F411xE, so I'm assuming all the sectors for the STM32F411CC are just half of all the sectors outlined in the datasheet (RM0383 / DocID026448 Rev 1 - page 43).The ST-LINK tool > Erase sectors option matches the datasheet, which is misleading as it shows a total of 512kB when counting up each sector!I just want to be 100% certain. My guess is that the sectors are using the same Start address but have the following sizes: Sector 0: 8KSector 1: 8KSector 2: 8KSector 3: 8KSector 4: 32KSector 5: 64KSector 6: 64KSector 7: 64KThanks!#stm32f4xx-flash #flash-stm32 #stm32f411cc

Posted on July 11, 2017 at 08:10hii have network of rs485 and i want uniq identifier on stm32f0 . does this mcu have something like this?if not what u recommend?#stm32f0 #unique-id #device-id

Posted on June 28, 2017 at 17:51I use BSP/STM32469l-Discovery (from STM32CubeMx) , and use STM32F4xx_HAL_Driver to do a small project like this video : https://www.youtube.com/watch?v=u_TVAudWabI  (I convert evaluation board from STM32F429-Disco to STM32469-Disco)But I got some error like:LCD_TEST\LCD_TEST.axf: Error: L6218E: Undefined symbol HAL_DSI_ConfigPhyTimer (referred from stm32469i_discovery_lcd.o).LCD_TEST\LCD_TEST.axf: Error: L6218E: Undefined symbol HAL_DSI_ConfigVideoMode (referred from stm32469i_discovery_lcd.o).LCD_TEST\LCD_TEST.axf: Error: L6218E: Undefined symbol HAL_DSI_DeInit (referred from stm32469i_discovery_lcd.o).LCD_TEST\LCD_TEST.axf: Error: L6218E: Undefined symbol HAL_DSI_IRQHandler (referred from stm32469i_discovery_lcd.o).LCD_TEST\LCD_TEST.axf: Error: L6218E: Undefined symbol HAL_DSI_Init (referred from stm32469i_discovery_lcd.o).LCD_TEST\LCD_TEST.axf: Error: L6218E: Undefined symbol HAL_DSI_LongWrite (referred from stm32469i_discovery_lcd.o).LCD_T

Posted on June 06, 2017 at 07:551. è«‹å•� CR95HF 是å�¦æœ‰æ�?¯æ�´ Mifare Desfire secure mode çš„ command API ?2. ç›®å‰�在 M24LR-DISCOVERY demo board 無法正確讀å�–加密é�Žçš„ UID ，都是 Random，請å•�有何解決方案?#

Posted on April 25, 2017 at 14:11DS STM32F405xx STM32F407xx, DocID022152 Rev 8, Table 50. I/O AC characteristics :tEXTIpw Pulse width of external signals detected by the EXTI controller  - min.10nsThis hints that there's a pair of edge-sensitive latches for each EXTI input, independent from any internal clock.RM0090, DocID018909 Rev 13, 12.2.1  EXTI main features says otherwise:The main features of the EXTI controller are the following:[...]detection of external signals with a pulse width lower than the APB2 clock period. Referto the electrical characteristics section of the STM32F4xx datasheets for details on thisparameter.Max. APB2 clock is 84MHz so the period is >10ns; but regardless, the DS should not use a fixed value if it is APB-clock dependent.ST, please clarify.JW

Posted on July 08, 2017 at 22:35On page 34 of the STM32F030 datasheet there is a table of Alternate Functions that I think contains an error.If you look at the GPIOA_AFR registers for port A and select column AF4 you will see that TIM14_CH1 is mentioned twice. The first time in connection with PA4 and the second time with PA7.Either I do not quite understand how it works or the second instance of TIM14_CH1 should be in another column. Besides that, why isn't this table in the Reference Manual (RM0360)?!(btw.  AF4 does connect TIM14_CH1 to PA4 )

Posted on March 15, 2017 at 16:57Hello,at the Embedded World 2017 campaign, ST25R3911B-Disco boards are given out. However looking for the software, I only foundhttp://www.st.com/content/st_com/en/products/embedded-software/st25-nfc-rfid-software/stsw-st25r001.html That page only gives a data brief about installation, but no software.Interest in those give-away gadget is highest short after aquisation by the user. So not having things ready for a beginnig user with hand-out of the gadget seems like a missed chance to me, Chances are high that many of these gadgets will end up in the drawer after the first unsuccessfully attempt to use them.Regards

Posted on July 07, 2017 at 05:45For a while now, I've been wanting to learn the DFSDM (cascaded-integrator-comb, or CIC, filter) peripheral on the STM32L4 and use it for some serious DSP work.  This week I finally had time to dig in and get it working.  The application (for now) is an ultrasonic translator.  The ultrasonic sounds are recorded by an external microphone and digitized at ~ 400 kHz.  In software, I mix this signal with a tunable local oscillator (NCO), then decimate/LPF by 16x, and shove the result out the codec to headphones.  (I am using an STM32L476 discovery board with some custom hardware.)The 16x decimation was working with a software-only, FFT-based filter, and I've been listening to bats with the thing.  So far so good!  But I wanted to use the hardware CIC (DFSDM) to reduce the processor load.  I also have some other project ideas for the DFSDM, and this was a good testbed for getting started with it.The DFSDM chapter in th

Posted on July 05, 2017 at 20:45With the STM32L476ZGT6 Evaluation board, which I've just started to use, I tried the LPTIM_PWM_LSE demo successfully (after modifying timer frequency to make LED blink at 1Hz). I then attempted to change the demo to use LPTIM2 instead. I noted that this did not produce the same result as for LPTIM1 where the LED would blink until Wkup/Tamper was triggered - the LED just stays on.main.c changes:1) RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LPTIM2;2) RCC_PeriphCLKInitStruct.Lptim2ClockSelection = RCC_LPTIM2CLKSOURCE_LSE;3) LptimHandle.Instance = LPTIM2;4) HAL_PWREx_EnterSTOP1Mode(PWR_STOPENTRY_WFI);  (instead of STOP2, since LPTIM2 doesn't work in STOP2)stm32l4xx_hal_msp changes:1) Changed 'LPTIM1' to 'LPTIM2' for all functions containing 'LPTIM1' in the name2) GPIO_InitStruct.Alternate = GPIO_AF14_LPTIM2;Any insights into why I cannot substitute LPTIM2 for LPTIM1 in this demo?Thanks!#lptim

Posted on July 06, 2017 at 08:00Hello everybody,I am using I2C interface in master mode to collect data from external slave device with DMA in non-blocking mode.- HAL_I2C_Master_Transmit_DMA- HAL_I2C_Master_Receive_DMAMy program is working fine since I get correct data.BUT I would like to get an event that the exchanges are completed by registering these functions during INIT step :-  // HAL Register DMA Tx Transfer events HAL_DMA_RegisterCallback(dmaHandleTx, HAL_DMA_XFER_CPLT_CB_ID, i2cTransmitFullCallback)- // HAL Register DMA Rx Transfer events HAL_DMA_RegisterCallback(dmaHandleRx, HAL_DMA_XFER_CPLT_CB_ID, i2cReceiveFullCallback)When I run my program, I get DMA interrupt in below function but no callback call is triggered. void DMA1_Ch2_3_DMA2_Ch1_2_IRQHandler(void){    HAL_DMA_IRQHandler(dmaHandleTx);    HAL_DMA_IRQHandler(dmaHandleRx);}I tried to look carefully inside the HAL itself and I found something quite strange from my und

Posted on July 05, 2017 at 13:52Hi,There is a bug in F0 LL library rcc module.RCC_GetSystemClockFreq() is incorrect if the mcu use HSI48 as system clock,in this case it returns HSI_VALUE but not 48MHz.

Posted on March 24, 2017 at 12:52I see when you change settings on RCC,  from internal oscillator to external, both line on .ioc file are setted and the code generated is this:RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSE;On .ioc file you can find this lines, and i think is not normalRCC.OscillatorTypeHSE=RCC_OSCILLATORTYPE_HSERCC.OscillatorTypeHSI=RCC_OSCILLATORTYPE_HSIRCC.OscillatorTypeLSI=Not only, normaly before generate file, cubemx ask me for enable TIMBase when i use FREErtos, now ask nothing.Try my ioc. attachedSorry for my english !

Posted on July 06, 2017 at 05:53I am working with the STM32F429 and we use the timer pwm output as the ads1271 CLK。 we get the wave as the picture showWe think CLK quality is poor,so the sample rate is inaccurate. Any ideas ?Thanks,End.

Posted on June 20, 2017 at 11:35Hi Team,I would like to know 'ST25TA02K-P' TAG IC will support any encryption/cryptographic modes to secure the data??Or any other TAG from ST support that feature. Basically i want to secure the TAG data.#st25ta02k-p

Posted on July 04, 2017 at 11:16Hi everyone,I am designing a system that needs a bunch of interrupts working. By now I have three possible source of interrupts working:+ USART6+ SPI2+ TIM6The USART6 works sending and receiving data from PC.When SPI2 and TIM6 are not working the USART works with no problems, I can receive and send data prefectly.The protocol between the PC and the system is this:- I constantly send data packets to the PC until I receive an END data frame from it. At this moment I should stop sending packets and change to other state to make other tasks.The problem is when I am using SPI and TIM interrupts: TIM is a timer to trigger and data over the SPI to another IC, while I need to send data to the PC using USART.While the system sends data to PC all works OK, but when it tries to receive the END from the PC I go to an overrun error in the USART.I am trying to configure the priority this way:NVIC_SetPriorityGrouping(4);  NVIC_SetPriority(USART6_IRQn, 0);NVI

Posted on July 03, 2017 at 13:51Hello,I need using the first 32Kb flash section in order to store data in an STM32F765VGT (1M of flash). How can I change the program start address to the second section. I�ve achieved to reallocate the program code in the second section by means of the linker script. But when I explore the first section with the stlink utility, in the first section, there is a piece of code instead of being empty. Furthermore if I erase this section the program stops working.Thank you very much.#linker #program #stm32f7 #stm32f765 #store-data #change-section #flash-section #start #program-start-address

Posted on May 05, 2017 at 09:34Hello.I try to use I-CUBE-LRWAN example End Node for stm32L152. Base station is iC880A with raspberry pi 3. Also i use https://community.st.com/discussion/thethingsnetwork.org. I ported this example to iM880B (stm32L151CB-A + sx1272). And my end node device easy joined to base station and to cloud. But after first sending frame with data, LoRaMacState == LORAMAC_TX_RUNNING. And when time is gone for next send frame, LoRaMacState not cleared. So next frame is not sending while not reboot device. I found that after first send frame, in function OnRxWindow2TimerEvent():if( RegionRxConfig( LoRaMacRegion, &rxConfig, ( int8_t* )&McpsIndication.RxDatarate ) == true ) { RxWindowSetup( rxConfig.RxContinuous, LoRaMacParams.MaxRxWindow ); RxSlot = rxConfig.Window; }Condition not met, because SX1272.Settings.State == RF_RX_RUNNING, but must be SX1272.Settings.State == RF_IDLE. All parameters in example is default. What is wrong? How

Posted on July 02, 2017 at 14:08The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on July 05, 2017 at 15:53STM32F091xc processorOne spi controllerI'm doing transfers to a LCD.  The LCD appears to somewhat work.  However the colors and orientation seems odd.  I looked at the SPI bus on Logic Analyzer and I get delays between every 9 bytes.  I'm thinking these delays between packet bursts are the culprit.  ie. a cmd just happens to be on a 9th byte and then the micro inserts a large delay between the cmd arguments and the cmd is ignored by the LCD.For instance here is the screenshot of the byte transfers.  I looked at the errata for this processor but I did not see anything related to SPI in master mode.  I'm using the HAL_SPI_Transmit() routine.  Note, one potential problem is that I am doing the transfers one byte at a time.  However these delays were not present in 32f072 cpu based board.

Posted on December 06, 2016 at 18:20The define USBD_CDC_INTERVAL in usbd_conf.h generated with CubeMX is not used anywhere in the project. It was used in the old USB Library in the usbd_cdc_core.c SOF-Function, which no longer exists.#f4 #usb #cubemx #cdc #vcp

Posted on June 29, 2017 at 16:53Hi,I'm using X-NUCLEO-IKS01A1 with arduino uno,I'm getting the output for HTS221 with the codehttps://github.com/ControlEverythingCommunity/HTS221/blob/master/C/HTS221.c  ,the connections seem to be correct but when I'm trying to get the output for LPS25HB from the code https://github.com/ControlEverythingCommunity/LPS25HB/blob/master/Arduino/LPS25HB.ino I'm always getting the output as 0 hpa only.Even when I'm applying the pressure at the sensor.In the datasheet it is there that CS should be connected to VddIO ,I think it is internally connected as all the sensors in  X-NUCLEO-IKS01A1 are in I2C line.Please do needful.I need LPS25HB working with arduino UNO.Thanks and Regards,Radhika