Solved

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

Posted on July 04, 2017 at 10:45Hello Team,While generating drivers for STM32F7 disco board with STM32CUBEMX tool I have faced the error saying THe HAL timebase source can e changed from the pinout tab under SYS.  Please below picture.  Can I still generate code or is it mandatory to change as per the warning and what would be the impact. Thank you,

Posted on July 03, 2017 at 13:00I am documenting short-circuit behavior of the VND5T050AK.  I remember seeing a threshold around 36-44 A as the trip point to put this chip in the overload state.  However I can't find any spec in the data sheet and can't remember where I saw it.  Does anyone remember where this is documented?

Posted on July 04, 2017 at 11:52Hello,Is there an STM32 Cortex-M0 MCU that contains an 10/100 Ethernet MAC periphiralThanks,#cortex-m0-stm32

Posted on July 03, 2017 at 16:49Hello again community !I have next problem with my stm32F030RCT6. Problem is with receiving data from UART. In my project I am using all 6 UART’s that is why I can’t use DMA for all UART’s (this Mcu has no enough DMA channels). Problem is with about 30 % received frames by HAL_UART_Receive_IT() . With DMA receiving has no problem. While receiving bytes sometimes occurs faults. I am receiving one byte by one. For example USART settings: Baud Rate: 115200 Word Length: 8 Bits Parity: NoneStop Bits: 1Data Direction: Receive and TransmitOver Sampling: 16 Samples Single Sample: DisablePolarity: HighAssertion Time: 0 Sample Time UnitDeassertion Time: 0 Sample Time Unit...Overrun: EnableDMA on RX Error: EnableMSB First: Disable------------------------------ CLOCK -----------------------------RCC: HSE - Crystal/Ceramic Resonator          LSE - DisableWhen Baud Rate is set to 9600 everything is ok, there are no faults.

Posted on June 30, 2017 at 09:52Hello,First I am new in ST device, I only used Microchip PIC for 6 years.So any advise or comment will be appreciated.I am trying to use I2C interface on NucleoBoard F091RC1.I2C_HandleTypeDef* hi2c1;void i2cInit(I2C_HandleTypeDef* i2cHandler){      // Assigned I2C handler pointer         hi2c1 = i2cHandler;    // Call I2C init function        MX_I2C1_Init();}void MX_I2C1_Init(void){hi2c1->Instance = I2C1;      hi2c1->Init.Timing = 0x2000090E;       hi2c1->Init.OwnAddress1 = 0;       hi2c1->Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;       hi2c1->Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;       hi2c1->Init.OwnAddress2 = 0;       hi2c1

Posted on June 28, 2017 at 14:06The STM32F303C6 has COMP peripherals COMP2, COMP4 & COMP6.Each of these comparators have a positive (INP) and negative (INM) input pin and an output (OUT) pin.Furthermore the data sheet specifies for each comparator a pin named INM4.I am wondering what these INM4 pins are for. Can somebody please tell me?Thank you in advance,Gahlen.#stm32f303c6 #comp

Posted on January 20, 2017 at 12:31 I have a very typical application here - long periods of minimal current consumption (15 minutes to 24 hours sleep duration) with short periods of activity in between. In my particular case, this is mostly ADC and GPIO manipulation (which explains some of the extra initialisation in my code which is unused) but for this example, I am just trying to achieve the following: Turn LED onDelay 1000ms (using HAL delay - don't care about efficiency here)Turn LED offEnter Stop modeHave RTC Wakeup Timer return me to Step 1. after 5 seconds So far this works well for the first loop through - I see the LED turn on, turn off after 1000ms, stay off for 5 seconds (current draw drops to approx. 2uA) and then turn on again. However, the LED never turns off again. I can't use SWD to debug this as the board seems to never enter Stop mode with SWD debugging active. My code (partially generated by STM32CubeMX and partially from reading docs) is as below: #include 'm

Posted on June 30, 2017 at 20:20I have a design where another micro is connected to the STM32F031 UART pins and I am attempting to enter the rom bootloader.  I referenced AN3155 for details on how the bootloader works, however, there is no definition I could find for the serial connection besides 8-E-1 and baud rate.  Are the signal levels high true, low true, idle high, idle low etc, or will it detect the levels I am using and responded accordingly?

Posted on June 23, 2017 at 15:24Hey guys,i just created a project for the STM32L4 Discovery Board with CubeMX (I'm using Atollic TrueStudio). I assume that CubeMX always generates the same structure, namely the folders 'Drivers', 'Inc', 'Src', 'startup' and 'Middlewares'. Is this assumption correct or is this structure only generated when using CubeMX with Atollic TrueStudio (e.g. I could have used Eclipse + OpenSTM32 instead)?Now, where can I place my own source code and header files? Do I have to use the folders 'Src' and 'Inc'? I would prefer using my own structure, because I only want to port an already existing software to STM32.Thanks in advance! #atollic #cube #hal #cubemx #truestudio #source-file #header-file #mx #own

Posted on June 30, 2017 at 15:12I'm currently working on a driver on an STM32F0 that joins the I2C bus as a slave device. Currently there is no mention in the reference manual on how to handle a Repeated Start Condition, does anyone know how to?I am currently handling the I2C request in the AddressCallback and am able to make it work when all the frames are terminated by a Stop Condition but when I try to detect a Repeated Start using the NACK flag(From RM: The bit is set by software, cleared by hardware when the NACK is sent, or when a STOP condition or an Address Matched is received, or when PE=0.), the ADDR flag of the I2C is never set meaning the ISR is never called again. Clock stretching is also enabled. #f0 #stm32f0 #stm32 #i2c

Posted on June 22, 2017 at 18:21Hi,I have X-NUCLEO-IKS01A1 having 4 MEM sensors ,I have seen that this board is compatible with arduino UNO,I have connected the board same as like the ST nucleio board,but I couldn't find the sensors giving output with arduino UNO code . I have also connected the board with Intel edison,but I couldn't detect the addresses of the sensors.Can you please let me know the hardware connection of X-NUCLEO-IKS01A1 with arduino UNO .I'm providing 5V as input (Vin) and added pullup resisters too.Thanks and Regards,Radhika

Posted on June 29, 2017 at 11:40I use SPC5604B54L5 DSPI module, LTC6804 (Battery voltage acquisition chip) and the microcontroller through the SPI communication, the mode is CPOL = 1, CPHA = 1, but the communication is error.Before I used STM32 and LTC6804 to communicate, it was successful.So I connected a logic analyzer: I found that each time the SPC5604 sends a byte, MOSI will pull high .    in other words, when the SPI is in the idle state, MOSI is high by default.What can I do to make MOSI in the default state is low?I am very very  puzzled why the logic analyzer can analyze the data sent by the SPC5604, but the LTC6804 does not have any data to return. This indicates that the SPC5604 rules for sending data are compliant with the SPI rules. Please note that STM32 and 6804 can communicate normally i am  using SPI0PA13-------MOSIPA15-------CS（soft ware control）PA12-------MISOPA14-------SCK I received all the data are 0

Posted on June 16, 2017 at 23:56From the STM32F412G-DISCO demouint32_t HAL_GetTick(void){ return (DWT->CYCCNT / (HAL_RCC_GetHCLKFreq() / 1000)) ;}How exactly does this wrap properly within the 32-bit number space? Answer: IT DOESN'T

Posted on June 28, 2017 at 17:20Hello,We're trying to migrate a board from the SPWF01SC to the SPWF04SC. Two of the additions to the SPWF04 are the LSE and HSE external clock pins. They're not displayed on the block diagram for the SPWF04 in its datasheet so does it use the STM32F429's internal RC oscillator by default or do we need to add oscillators to our board as per the X-NUCLEO-IDW04A1 evaluation board?Thanks,Steve

Posted on June 27, 2017 at 15:02Hi.I'm trying to use DMA to  drive PWM output for led effects. MCU write seems to be OK, however there's few very weird consepts related to DMA configuration I don't seem to be able to wrap my head around.void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim){ /*♯♯-1- Enable peripherals and GPIO Clocks ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/ /* TIMx clock enable *//* Enable DMA2 clock */ DMAx_CLK_ENABLE /*♯♯-3- Configure the DMA stream ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/ /* Set the parameters to be configured */ hdma_tim.Init.Channel = DMA_CHANNEL_CC3; hdma_tim.Init.Direction = DMA_MEMORY_TO_PERIPH; hdma_tim.Init.PeriphInc = DMA_PINC_DISABLE; hdma_tim.Init.MemInc = DMA_MINC_ENABLE; hdma_tim.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; hdma_tim.Init.MemDataAlignment = DMA_MDATAALIGN_WORD; hdma_tim.Init.Mode = DMA_NORMAL; hdma_tim.Init.Priority = DMA_PRIORITY_HIGH;/* hdma_tim.Init.FIFOMode = DMA_FIFOMODE_DISABLE; hdma_tim.Init.FIFOThreshold = DM

Posted on June 27, 2017 at 05:41Hi,I am new to STM32 and want to learn STM32F4 but I could not find the standard peripheral library manual online.  I would like to see some explanations of the library functions and some examples.  Any help?  Thanks in advance!#standard-peripheral-library #stm32f4 #manual

Posted on June 28, 2017 at 03:19Dear allUseing CAN1 of STM32F205, 32-bit Mask Mode filter, filter bank 0-13 work all right for now. Then I am trying to configurate CAN2SB = 28d, for letting CAN1 use all 28 filter banks.But it doesn't work, here is my part of code, would you please help me?Thx inadvancevoid    can_Init(void){UCHAR i;    RCC->APB1ENR  |= RCC_APB1ENR_CAN1EN;                                // Enable clock for CAN    RCC->APB1RSTR |= RCC_APB1RSTR_CAN1RST;                              // Reset CAN module        RCC->APB1RSTR &= ~RCC_APB1RSTR_CAN1RST;      &nb

Posted on June 26, 2017 at 11:46question 1：i2c_result_t i2c_lld_write(uint8_t dev_addr, uint16_t reg_addr,uint8_t *data, uint8_t ndata_bytes){..................  /* Check for valid address */   if ((dev_addr < 8U) || (dev_addr > 119U))    {      return I2C_ERROR_INVALID_ADDRESS;    }................}Why is the slave address between 8-119? Is this slave address 7bit or 8bit?question 2:My project uses FreeRTOS, each time the code generated, the macro configUSE_TIMERS will automatically become 0. And the Makefile in the compiler parameters will automatically become -O2. Each modification is very troublesome, how can I do?

Posted on June 26, 2017 at 15:39Hi,STM32F446 user here. I'm routing RTC alarm output to PC13 and after an alarm I need to clear the output pin back to low state. I recall myself reading something about clearing RTC alarm output in a specific way but I can't find the source anymore.#rtc #pc13 #alarm

Posted on October 11, 2015 at 17:16Stock present at major North American distributors, Arrow, Digikey and Mouser.http://www.digikey.com/product-detail/en/STM32F469I-DISCO/497-15990-ND/5428811 has the most aggressive pricing at ~$60 vs ~$80