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Hi, can anyone explain to me if it's possible to use the STM32L452 for cycle-by-cycle current control as exemplified in AN4232 p.8-9 and if so, how it's done? I'm asking because I have spent quite some time trying to configure COMP1 to signal the OCREFCLR. As far as I understand, it should be possible to redirect the comparator output internally to the OCREFCLR signal, which is used to clear the PWM signal. The STM32L45xxx reference manual (RM0394 p. 497) writes the following about COMP pins and internal signals: This makes me believe that it is possible. The timer TIM3 is configured as follows:The COMP1 configuration window looks like this:How do I configure it to redirect the COMP output?Best Regards,Andreas

Posted on January 03, 2018 at 10:44Hi again,I'm using an RTC as I explained in https://community.st.com/0D50X00009XkWttSAF.Our device have a battery in VBAT, so the RTC still works when the device it's power off. But after a power on the RTC can loss up to 1 second, I think due we configure the RTC again.Using backup registers we can detect if we come for the first power on (and we have to configure the RTC) or not (and maybe we can avoid configuring the RTC).How we can avoid this delay? Which should be the configuration of the RTC in the second case?Thank you!#rtc

Is there a document that discusses the buses?I was wondering how much Chrome-Art might affect Flash-Art and CPU, if a picture is stored in flash.How many bus cycles Chrome-Art takes for a transfer and how does Flash-Art access the flash.I'm working on something that the bus timing might be important for.My current guess is that Chrome-Art takes about 10 cycles per transfer and maybe 2 cycles of them are such that Chrome-Art is not using the bus and Flash-Art can use those cycles.

Hi All. I want to configure the filter in such a way that the data in the out registers are not filtered, and the data for interrupt AOI are filtered. But I have filtered data in both the interrupt and the output registers.My settings of filter: AX_Write (0x21, 0xC1);Whats wrong?

JW

When enabling a peripheral in STM32CubeMx (switch from disable to enable) Does this mean that its clock wil be activated in the program after generating the initialization code for a given IDE and we don't need to insert the   __HAL_RCC_peripheral_CLK_ENABLE() function ? thank you Wissem

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CAN driver in the Legacy folder must use HAL_CAN_LEGACY_MODULE_ENABLED instead of HAL_CAN_MODULE_ENABLED.

hi ,I want to generate PWM Output on PIN PB15 of STM32F103This PIN has a default alternate function -> TIM1_CH3N for PWM outputUnable to get it Working.I have give the code belowCan anyone let me know what is missing??Thanks-Adityamain.c/** * @brief System Clock Configuration * @retval None */void SystemClock_Config(void){ RCC_OscInitTypeDef RCC_OscInitStruct; RCC_ClkInitTypeDef RCC_ClkInitStruct;   /**Initializes the CPU, AHB and APB busses clocks    */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {   _Error_Handler(__FILE_

I have trouble to understand bits in phy registers using HAL_ETH_WritePHYRegister() method.I'll try to explain my question using PHY_AUTONEGOTIATION value defined in stm32xxxx_hal_config.hBasing on the default LAN8742a which is implemented on nucleo boards with ethernet, also well supported by CubeMX.Define in stm32fxxx_hal_config.h:#define PHY_BCR ((uint16_t)0x00U) /*!< Transceiver Basic Control Register */ #define PHY_AUTONEGOTIATION ((uint16_t)0x1000U) /*!< Enable auto-negotiation function */File stm32fxxx_hal_eth.c: /* Enable Auto-Negotiation */ if((HAL_ETH_WritePHYRegister(heth, PHY_BCR, PHY_AUTONEGOTIATION)) != HAL_OK) { ... }In LAN8742a datasheet (http://ww1.microchip.com/downloads/en/DeviceDoc/8742a.pdf):4.2.1 Basic Control Register, Page 67:bit 12: Auto-Negotiation Enable 0: disable auto-negotiation process 1: enable auto-negotiation process  As I understand HAL_ETH_WritePHYRegister(heth, PHY_BCR, PHY_AUTONEGOTIATION) sets 12th bit of BCR.The question is:How

Is there an MPU in STM32F427?It's mentioned in STM32F427xx/STM32F429xx data sheets (dm00071990), but not in RM0090.

Hi,I'm working on a project to create a voltage inverter controlled by a STM32103C8T6 (the bluepill). Later, I intend to include a boost converter to have a better voltage control.The problem is that my delays aren't working properly. Where I should get 7ms, I get 8ms, and where I should get 1ms, I get 2ms.In the infinite loop is GPIOA->BSRR = GPIO_PIN_9; // Bit 9 HAL_Delay(7);   GPIOA->BRR = GPIO_PIN_9; HAL_Delay(1);   GPIOA->BSRR = GPIO_PIN_10; // Bit 10 HAL_Delay(7);   GPIOA->BRR = GPIO_PIN_10; HAL_Delay(1);In the inverter's output, I'm getting 50Hz when I should get 62.5Hz approximately.The complete code is available in https://gist.github.com/adailtonjn68/b80a8f2370d5024dc6b750ffe0dad0b8I'm configuring the MCU to run at 72MHz, the basic project is generated in CubeMX, and I use CubeProgrammer to program the MCU through ST-Link V2.It is important to mention that I am a newbie in STM32 programming. My experience I have is programming Arduino

This is the same question that I posted on the NXP Community "Problems doing updateBinary"I send 16 bytes using the NDEF updateBinary command after the NDEF Select file0x2 0x0 0xd6 0x0 0x4 0x10 0x54, 0x77 0x61 0x73 0x62 0x72 0x69 0x6c 0x6c 0x69, 0x67 0x61 0x6e 0x64 0x74 0x68 And get back 0xf2, 0x2

Dear Sir or madam, I would like to report a discrepancy in the reference manual of the stm32l4 series Quote from 45.6.2 Buffer descriptor table "The first packet memory location is located at 0x4000 6000"The package memory for usb is also called usb sram.In the memory register map (Table 2) the start adress of the usb sram is 0x4006C00 In the HAL lib also 0x4006C00 is used therefore i guess the adress in 45.6.2 is wrong. Is that right ?T.Zirni

Hi,I have a Nucleo STM32F767ZI with a X-Nucleo-PLC01A1 and a test application that cyclically switches ON/OFF the outputs .All works fine when I use HSI, with Output LEDs that stay solid during ON state.If I use High Speed Clock (in Cube MX, PCC->HSE->Crystal/Ceramic Resonator), LEDs blink with high freq, as a sort of refresh.As you can see , I set both HSE & HSI to 16MHz, so working frequency are the same.Can you help me or give me any suggestions?This is HSI Clock:while this is HSE:Thanks and best regards,Mario

Maximum CPU freq. with 3.3V power supply for STM32H7 series is 400 MHz. Is it the same for 1.8V?

I'm trying to generate a 2 second break from USART1 on a STM32F105. It's needed for a custom protocol running on top of LIN: the TX line must be driven low for 2 seconds.UARTs like 8250 and 16550 have a Set Break Enable Bit (SBE) in their Line Control Register that stays set until it's cleared by software, but the STM32F1 UART appears to reset the bit in hardware.Section 27.3.1 of the STM32F1 reference manual says:"A Break character is interpreted on receiving “0�?s for a frame period. At the end of the break frame the transmitter inserts either 1 or 2 stop bits (logic “1�? bit) to acknowledge the start bit."Further down in 27.3.2 Break Characters it says"Setting the SBK bit transmits a break character. The break frame length depends on the M bit (see Figure 279).If the SBK bit is set to ‘1’ a break character is sent on the TX line after completing the current character transmission. This bit is reset by hardware when the break character is completed (during the stop bit of the break c

Hi All,After a day or so of researching I feel more overwhelmed than anything regarding using SPI to communicate with SD cards!! There is so much STUFF out there regarding embedded c and SD cards - I don't even know where to begin! I've gone down sooo many rabbit holes trying to find even a basic starting point!I am having trouble finding documented guides on how to communicate with an SD card using the HAL libraries - nothing simple anyway, I see a lot on SDIO coms and the fatfs library but I am restricted to SPI. I am using the SD card as flash storage so I don't need to use the FATfs library, I plan on using it basically like SRAM for storing variables etc.One question I have to begin with I suppose, do I NEED a file system to communicate with an SD card?My initial plan was to use the HAL library SD card functions listed in the HAL drivers datasheet ( Section 43 in UM1940) but I'm struggling to find papers on how to go about this - especially regarding the commands needed for readin

Hi to All ! I'm a new in STM32 MCU programming. (But with big experience in C/C++).Just bought STM32L4R9I-DISCO, install eclipse with plugin for AC6 toolchain, STM32Cube under Linux. Build one of the examples : RTC-timestamp, erase the Flash (without problems) and try to install example, but got : =========================================================auto erase enabledInfo : Device id = 0x10036470Info : STM32L4xx flash size is 2048kb, base address is 0x8000000Info : Erase the padded zone before the writeError: Whole bank access must start at beginning of bank.target halted due to breakpoint, current mode: Thread xPSR: 0x61000000 pc: 0x20000050 msp: 0xfffffffcInfo : block write succeededwrote 16384 bytes from file Debug/STM32L4R9I-Discovery_RTC_TimeStamp.elf in 0.443163s (36.104 KiB/s)** Programming Finished **** Verify Started **target halted due to breakpoint, current mode: Thread xPSR: 0x61000000 pc: 0x2000002e msp: 0xfffffffctarget halted due to breakpoint, current mode

I have used STM32Cube_FW_L4_V1.13.0 to create a customHid device but i can't get it working correctly with PC. I get the descriptors etc. but PC always says the device is in low power state. Any ideas what might be wrong?Information from PC:[Port3] : USB Input DeviceIs Port User Connectable:     yesIs Port Debug Capable:      noCompanion Port Number:      16Companion Hub Symbolic Link Name: USB#ROOT_HUB30#4&11118949&0&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8}Protocols Supported: USB 1.1:             yes USB 2.0:             yes USB 3.0:             no    ---===>Device Information<===---String Descriptor for index 2 not available while device is in lo

Posted on July 13, 2018 at 12:01Hi, I'm trying to run EVAL-ST95HF_FW_V3.7.0 source code on STM32L4 processor but unfortunately I can't link the compiled objects because of undefined reference to 'PICCNFCDEP_ReplyCommand' and 'PICCNFCDEP_Init'. The definition of these functions is missing in EVAL-ST95HF_FW_V3.7.0 source code, I can find only the declaration of these functions in 'lib_nfcdeptarget.h'. Thanks for the help in advance. Kind regards,Maciej #piccnfcdep_replycommand #st95hf #undefined-reference #eval-st95hf_fw_v3.7.0 #eval-st95hf #piccnfcdep_init

HI,  I am considering the use of STM32F0 device for my project. How do I isolate the safety related code(for functional safety)  from the general code, so that a f/w update on the general code doesn't affect the safety related code? Are there any hardware provisions on the STM32 devices to help me isolate these sections? Or are there any software means to isolate the two?

Using STM32F030 / F042. I have a GPS receiver onboard which produces a very accurate pulse-per-second signal (~40ns). I want to use this timing source to keep the system clock, or at least the RTC accurate. The user may wander in and out of GPS reception, so the pulses may come at odd intervals, but when they come, their rising edges always align with the top of the second.I should add that I'm using an 8MHz crystal resonator (HSE).

How does one define the filter for a CAN A message, when the ID is only 11 bits?If using 16-bit filter, what should be put to the EXTID[17:15]?

I am trying to send a uint8 through the "Input Data" port on the I2C_Write block. According to the I2C polling example the block expects a uint8. However, when I build the C code and look at it in Keil I get an error in the "User's Data declarations for I2C_Write" saying "Error: Cannot take the address of an rvalue of type 'uint8_T' (aka 'unsigned char')I have provided screen shots of my project