Solved

Posted on March 20, 2017 at 15:53Hi,In my application I'm using the Independent watchdog on a STM32F407 with a maximum reload period of 2 ms. During some maintenance operations, we need to save some configuration parameters in flash memory. Even if we use the 16 kB sector, the erase time is greater than 2 ms and the IWDG make the MCU reset. Because there is only on flash bank on the 407 I can't kick the watchdog during the flash erase operation (and the bus stalls anyway), and it is not possible to disable the IWDG.In order to avoid these resets, I tried to reconfigure the IWDG with a max reload period of a few seconds which is, I measured, way greater than the time needed for the erase operation.In debug, the registers of the IWDG looks fine after the reconfiguration but when I tried in release or in debug but with no break point near the erase sector routine I have a IWDG reset.Is there any way to avoid this behavior or am I just not correctly reconfiguring the IWDG ?Many thanks in

Posted on March 24, 2017 at 02:08Are we getting close to the official announcement?  I recall reading that the L452's were supposed to be in the distribution channel this month.  Is that still the plan?  I see the part numbers are already there at a couple big distributors.I'd really like to give this chip a go outside of Nucleo64 board I already have.  The CEU6 would hit a sweet spot for me.#stm32l #news #stm32l452

Posted on March 13, 2017 at 00:37This is supposed to receive one byte in SPI bidirectional mode ([STM32Cube_FW_L4_V1.5.0]\Drivers\BSP\STM32L476G-Discovery\stm32l476g_discovery.c):&sharpif defined(__ICCARM__)&sharppragma optimize=none&sharpendif/** * @brief Receives a Byte from the SPI bus. * @retval The received byte value */static uint8_t SPIx_Read(void){ uint8_t receivedbyte;   __HAL_SPI_ENABLE(&SpiHandle);   __DSB();   __DSB();   __DSB();   __DSB();   __DSB();   __DSB();   __DSB();   __DSB();    __HAL_SPI_DISABLE(&SpiHandle); while((SpiHandle.Instance->SR & SPI_FLAG_RXNE) != SPI_FLAG_RXNE); /* read the received data */ receivedbyte = *(__IO uint8_t *)&SpiHandle.Instance->DR; /* Wait for the BSY flag reset */ while((SpiHandle.Instance->SR &

Posted on February 07, 2017 at 17:45When an SPI in SLAVE is clocked continuously (with NSS active) and DR is *not* written upon every TXE set, there are several possible scenarios for MOSI behaviour after the last explicitly written data bit is transmitted: MOSI is set permanently at a predetermined level (0 or 1)MOSI remains permanenlty at the last transmitted bit's levelMOSI is threestatedMOSI 'echoes' the received data on MISO, delayed by N SCK clocksMOSI transmits the last written data as if they would be written repeatedlyunspecified/undocumentedCurrently, the behaviour of SPI in STM32 (namely STM32F40x) is undocumented in this regard. Hereby, I would like to ask ST to properly document this behaviour in the Reference Manuals.Rationale:STM32s' SPIs in slave configuration are often used with masters with continuous clocking and no option for byte/word framing (e.g. various Cortex-A based SoC) (the 'F4xx itself, when used as a master, has no practically usable provision for framing

Posted on February 03, 2017 at 21:58I am evaluating an STM32 chip with CAN with respect to the CAN enabled bootloader.I have programmed for years on the TI CCS IDE on ARM4s.  SW4STM32 is a similar IDE.I have SW4STM32 installed.  I have the STM3210C connected via USB.I get the following when trying to debug:----------Error in final launch sequenceFailed to execute MI command:-target-select remote localhost:3333Error message from debugger back end:localhost:3333: The system tried to join a drive to a directory on a joined drive.localhost:3333: The system tried to join a drive to a directory on a joined drive.----------I am trying to get to the point where I can set a breakpoint on the first statement in main().I have attached screen shots of my debug configuration settings, where I would guess my settings are not correct.Might someone suggest what I have amiss?Where may I find some SW4STM32 quickstart documentation?  Especially for the STM3210C-EVAL?

Posted on January 30, 2017 at 19:21I'm using this exampleSTM32Cube_FW_F0_V1.7.0\Projects\STM32072B_EVAL\Applications\USB_Device\CDC_StandaloneWhich should simply present a VCP in Windows/Linux, after the drivers are installed (for Windows): http://www.st.com/en/development-tools/stsw-stm32102.html For the setup, I do the following- ''For power supply from USB (CN4) to STM32072B-EVAL only, JP19 is set..'' - from http://www.st.com/content/ccc/resource/technical/document/user_manual/63/18/cb/de/57/a6/45/17/DM00104135.pdf/files/DM00104135.pdf/jcr:content/translations/en.DM00104135.pdf- link TX / RX for loop-back using jumpers (but not important I just want the device to be recognised for now)- connect a standard USB cable from CN4 USB port to my computer. The cable is fine, as I also use this one connected to CN13 for programming via ST-Link.I get this unhappy messageI checked to see if what recognised by Ubuntu / Linux. It is notAm I missing something?#cdc #stm32 #usb #vcp

Posted on March 22, 2017 at 12:19Hi,I can�t find in your SPC58 B Product Line the 32-bit power architecture MCU SPC582B50E1.http://www.st.com/content/st_com/en/products/automotive-microcontrollers/spc5-32-bit-automotive-mcus/spc5-mcus-for-interior-networking-and-low-power-applications/spc58-b-line-mcus.htmlIs it possible to get a datasheet and a programmer�s reference manual?Best regards#reference-manual #datasheet #spc582b50e1

Posted on February 09, 2017 at 23:19I am new to both SW4STM32 and the emulator Rlink.  Rlink works with Ride7; however, there are some .ld tricks I cannot get to in Ride7.How do you setup Rlink to work with SW4STM32?Alternatively, how do you get the gdb to work with SW4STM32 + STM3210C-EVAL?

Posted on March 19, 2017 at 18:08Hi,I have a strange behaviour with the stm32F746 RTC.I use a 32768-Hz crystal (I have verified with the scope that it is running).I initialise as indicated in the following code, but the time register is incremented approximatively every 1500s instead of every 1s. The same code works perfectly with a stm32F429 (same board and same crystal).Can someone give me an advice ?Thank you  Edostatic void aProcess_0(void) {    uint32_t time, date, cpt =0;      RCC->APB1ENR |= RCC_APB1ENR_PWREN; // Turn on the PWREN// Make possible the access to the RTC & RTC backup register.// Add 1ms delay (for tests).// After the restart, the RTC is in the protected mode// Select the 32768-Hz clock & enable the RTC    PWR->CR1 |= PWR_CR_DBP;   kern_suspendProcess(1);   RCC->BDCR = 0;    RCC->BDCR = (RCC_BDCR_RTCSEL_0 | RCC_BDCR_RTCEN| RCC_BDCR_

Posted on March 21, 2017 at 15:35STM32F437In the main code I set ARR to 0xFFFF and PSC to 21000-1, a long count at a leisurely pace. After the timer counts a bit I enable an external event with my function generator. In my ISR experiment I immediately disable the timer ( TIM_Cmd(TIM4, DISABLE);)  and then there is a break point on the next line. At this point I turn off the function generator.As I would expect it sometime occurs that the CC1OF flag is set as well as the CC1IF flag. Reading about the status register in section 6 of RM0090 CCxOF flags are not described as interrupts. However if I do not clear it my program will re-enter the ISR a second time. So it seems that CC1OF does act like an interrupt as UIF nor any CCxIF flags are set.I am also curious why TIM_GetITStatus() and TIM_ClearITPendingBit() do not address the CCxOF flags. As one definitely needs to account for the OF bit and clear it.Thanks,JH

Posted on March 20, 2017 at 15:58Hi All,I am new to SPC family micro controllers,I am using SPC560B- Discovery board,I need a boot-loader sample code, which will be reading the binary file data over a UART,It will be very helpful if any one shares sample boot loader code.Thanks in advance,---Thanks & Regards,Mujeeb#spc5 #bootloader

Posted on March 21, 2017 at 17:07I'm using the test application 'STM test Application for discovery'  and also if i never used it, when i want to compile it i have this 3 errors:FMPLL-IN has a value (0) out of range: [4000000,64000000] configuration.xml /SPC560Bxx_RLA STM Test Application for Discovery FMPLL-IN ProblemFMPLL-VCO has a value (0) out of range: [256000000,512000000] configuration.xml /SPC560Bxx_RLA STM Test Application for Discovery FMPLL-VCO ProblemXOSC has a value (0) out of range: [4000000,16000000] configuration.xml /SPC560Bxx_RLA STM Test Application for Discovery XOSC ProblemCan someone help me??Does someone knows where are those variables and which are the correct values??Many thanks.

Posted on March 21, 2017 at 11:45I have an ST Nucleo-F413ZH board, which uses the STM32F413ZHT6U chip. I have checked both the Nucleo-F413ZH reference manual and the STM32F413ZH reference manual for the pinouts for the CAN1 interface. But the Nucleo manual says pins PD0 and PD1, whereas the STM32F413ZH manual says PG0 and PG1. Please see the following images:Nucleo Reference ManualSTM32F413ZH Reference ManualWhich manual is correct?#stm32f413 #can1 #nucleo-f413

Posted on March 02, 2017 at 11:56I am programing STm32F103 for Transmitting CAN data. Initialization of can  is done by following function with 250kb bit ratestatic void MX_CAN_Init(void){      /*♯♯-1- Configure the CAN peripheral ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/      hcan.Instance = CAN1;      hcan.pTxMsg = &TxMessage;      hcan.pRxMsg = &RxMessage;      hcan.Init.TTCM = DISABLE;      hcan.Init.ABOM = DISABLE;      hcan.Init.AWUM = DISABLE;      hcan.Init.NART = DISABLE;      hcan.Init.RFLM = DISABLE;      hcan.Init.TXFP = DISABLE;      hcan.Init.Mode = CAN_MODE_NORMAL;      hcan.Init.SJW = CAN_SJW_1TQ;      hcan.Init.BS1 = CAN_BS1_3TQ;      hcan.Init.BS2 = CAN_BS2_4TQ;   &nbsp

Posted on March 20, 2017 at 21:44Thanks to Clive and JW my timer is starting tick but I am getting interrupts from channels 2-4 and I am only using channel 1. I use the following command sequence so I don't know why CC2-4 are set in the SR.  TIM_ITConfig(TIM4, TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, DISABLE);  TIM_ITConfig(TIM4, TIM_IT_CC1 | TIM_IT_Update, ENABLE);  TIM_Cmd(TIM4, ENABLE);   TIM_ClearITPendingBit(TIM4, TIM_IT_Update | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4);Thanks,JH

Posted on March 20, 2017 at 20:10STM32F437I am using TIM4 for input capture and an interrupt occurs when external events occur. However I stopped the external event and no interrupt occurs on overflow although the UIF bit is set in SR. Code snippet below and TIM4 is listed below that.Thank you,JH~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~void RpmTask(void *p_arg){  TIM_TypeDef *tim4 = TIM4;  RCC_TypeDef *rcc = RCC;  OS_ERR err;  uint16_t rpm4 = 0;  NVIC_InitTypeDef NVIC_InitStruct;  /*Interrupt packet initialization*/  NVIC_InitStruct.NVIC_IRQChannel = TIM4_IRQn;   NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 1;   NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;   NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;  NVIC_Init(&NVIC_InitStruct);    //RPM timer setups  // APB1PeriphClock - 42 MHz  // APB2PeriphClock - 84 MHz  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3 | RCC_AP

Posted on March 17, 2017 at 22:20Device: STM32F437My timer seems to count twice as fast as I think it should. My peripheral clock is running @ 42MHz and I have scaled it down to 1 KHz. I got things started and interrupts going thanks to help from JW but I noticed the count seemed wrong. The external capture event occurs every 1 second and with the clock at 1 KHz I read the count a total of 10 times . I expected the count to to go up by 1000. With TIM_Period set to 0xFFFF I read a delta of 2000 each time. A code snippet is below and the detection is set for rising edge so it seems I should capture once a second and there should be a count of 1000 in the CNT register.Thanks,jh~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Posted on March 16, 2017 at 17:50I have a MKI72V1 adapter board. On Unico with V5 it does show up on the devices list however when I select the device I get an error message saying the device is not supported by the motherboard. Please advise.#mki172v1 #lsm303agr

Posted on March 16, 2017 at 20:16I have attempted to set up timer 4 channel 1 for input capture but unsuccessfully. The scope indicates that my 1KHz, 3vdc, 35 uSec pulses are making it to PD12 (TIM4, ch 1). However, CC1IF is never set. Although channels 2-4 are not configured CC2IF - CC4IF are being set and thus so is UIF but my ISR is never called. So I have two problems no CC1IF and no call to the ISR. Suggestions and advice would be much appreciated. The code follows.Thanks,JH~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~uint32_t rpm4;void RpmTask(void  *p_arg);void RpmTask(void *p_arg){    static int i = 0;    uint16_t itstatus = 0;    GPIO_StructInit(&GPIO_InitStruct);    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_12;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;    GPIO_InitStruct.GPIO_Speed = GPIO_High_Speed;&nbs

Posted on November 18, 2016 at 14:11 #define IS_RCC_PLLQ_VALUE(VALUE) ((4U <= (VALUE)) && ((VALUE) <= 15U)) This line doesn't fit to the RM0390 (page 126): 0000: PLLQ = 0, wrong configuration 0001: PLLQ = 1, wrong configuration 0010: PLLQ = 2 0011: PLLQ = 3 0100: PLLQ = 4 ... 1111: PLLQ = 15 #hal-library-bug

Posted on March 15, 2017 at 02:13I'm using a Nucleo-F413ZH board and an SSD1289 driver based LCD. I'm using the KEIL IDE.I just wanted to confirm that I have setup my LCD and FSMC correctly. I have performed the following steps: Setup FSMC in STM32CubeMX (Chip Select: NE1, Memory Type: LCD Interface, LCD Register Select: A0, Data: 16 bits).Wired the LCD to the pins as indicated by STM32CubeMX: D0-D15 to FSMC D0-D15,LCD RS to FSMC_A0,LCD WR to FSMC_NWE,LCD RD to FSMC_NOE,LCD CS to FSMC_NE1LCD RST to a GPIO pin setup as GPIO Output (Pin State: Low, Mode: Output Push Pull, Pullup/Pulldown: None, Speed: Low)My main function calls the following (in order): HAL_Init()SystemClock_Config()MX_GPIO_Init()MX_FSMC_Init()Left the timings to the default values which are sufficiently high such that they shouldn't cause any problems - I'll tweak these once its working.I have setup my read/write data and write index functions, using the values: REG: 0x60000000RAM: 0x60020000But I get just a white scre

Posted on March 15, 2017 at 17:38Is there a function or macro for determining the frequency of APB1PeriphClock and APB2PeriphClock?Thanks,jh#apb1periphclock

Posted on March 12, 2017 at 16:56I'm sorry in advance for such a stupid question, yet i can't find my error.I have some chinese nameless 'stm32f103c8t6 system board' with F103C8T6 on board. I also use Coocoox IDE and ST-Link v2 programmer. The following code should blink a led, which is pulled up through 1k resistor. Also pin A1 is giving me only ~1.830 Volts when set to HIGH; however, when i set A1 to LOW it still shows ~1.830 Volts. Other pins are showing zero results. Did i get shady MC or am i missing something?Also, i don't have oscilloscope, so i can't check what is going on with MCO pin, yet i get ~20-30 mVolts, which is not above ground level.void InitGPIO(){    RCC-> APB2ENR |= RCC_APB2ENR_AFIOEN;    RCC-> APB2ENR |= RCC_APB2ENR_IOPAEN;    GPIOA-> CRL &= ~GPIO_CRL_MODE1; // push-pull output    GPIOA-> CRL &= ~GPIO_CRL_CNF1; // led init on pin a1    GPIOA-> CRL |=

Posted on March 14, 2017 at 07:19MCU: STM32L443VCT-I am calling 'HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);' from the main application of my code but it seems that the function returns immediately (MCU not entering STOP2 mode). What I might be doing wrong, or where should I look for issues? Am I missing something. Do I need to do any sort of configuration so that the MCU enters STOP2 mode?I know that I have not configured any wakeup event, but initially I am just trying to make sure that the MCU enters the STOP2 mode-My program flows as follows: (SystemClock_Config is the only function called before calling HAL_PWREx_EnterSTOP2Mode)-void SystemClock_Config(void){RCC_OscInitTypeDef RCC_OscInitStruct;RCC_ClkInitTypeDef RCC_ClkInitStruct;RCC_PeriphCLKInitTypeDef PeriphClkInit; RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; RCC_OscInitStruct.MSIState = RCC_MSI_ON; RCC_OscInitStruct.MSICalibrationValue = 0; RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6; RCC_OscInitStruct.P

Posted on March 13, 2017 at 14:32I've used the eDesignSuite to design a power supply using a VIPer38LE.  I'm verifying results and I'm having difficulty getting to the same primary inductance the design suite is.  Can someone get that info to me?  I am currently using the formulas in the Fairchild Application Note AN4137.Thank You!Tom