STM32 MCUs Products

Hi!I'm using Nucleo-f429zi board and my trying to configure it to read and write data over modbus RTU (RS485)and i'm using keil uvision 5 to program. I have referred some videos and post on how to configure STM32 and its USART port for modbus communication but when I try to configure RCC in STM32cubeMX i get a error highlightingmaster clock 1 and when i hover mouse courser over it, it says conflict with usb.can someone explain me how to solve this error and why i'm facing this issue? 

I am trying to figure out why the state of GPIO pins are changing after entering Stop2 mode. I've got an ADC chip connected with Reset lines being held high by GPIO pins configured as push-pull with pull-ups enabled. When the device enters Stop2 mode, these GPIO lines drop. I catch the error right after the device exits Stop2 mode and I can see in the registers that the configuration of the GPIO pin is correct, but the bit to set the pin high in GPIO_ODR register has cleared.The reference manual (section 10.7.8) states the I/O pins should retain their RUN mode state in Stop2 mode. Help me understand. Am I missing something here?

I’m using CubeIDE and I want to internally connect peripherals to the comparators. This doesn’t appear to be supported by CubeIDE, but I’m wondering if its still supported by hardware somehow.I’m using an STM32G4 and I see that COMP6 INP lands on PB11, which is the same pin as OPAMP6 OUT. Can a pin overlap like this enable internal routing of OPAMP6 to COMP6?I can also see that OPAMP outputs can be mapped to ADC inputs that also fall on external pins that overlap with COMP comparator inputs. PA2 doubles as COMP2 OUT and ADC1 IN3, which can map internally to OPAMP2_VOUT. Would this work?Similarly, I want to drive a USART RX with comparators routed internally. I see that COMP6 OUT can land on the same pin as USART1 RX. Can I make the COMP drive the USART like this?

The maximum HCLK of STM32F407 is 168MHz, while the calibration value of Systick is 150MHz HCLK. What is the reason for setting the calibration value of Systick like this? Why not set the calibration value for Systick based on 168MHz HCLK?

Hi, I'm currently using the STM32U575 to develop a product, and my clock configuration is set to the maximum of 160MHz because I'm dealing with a large amount of data. I have two SPI channels collecting data at a sampling rate of 20kHz, with each sampling returning 70 data points. During operation, I encounter Hardfaults on the bus, with bus fault information showing IBUSERR or PRECISERR. I suspect that the CPU and DMA are competing for the bus, causing errors. However, I found that by adjusting the wait state parameter in the RAMCFG configuration to 1 or 2, the system runs much more stably. Is RAM access unstable at 160MHz? Do you have any experience with configuring RAM wait states, or how to ensure reliable operation?

Hi,We were using CubeProgrammer on Windows to program our MCU in DFU mode and everything was moving well until we noticed MAC does not detect USB in DFU mode.So, I am wondering if there is something we are missing to do which the MAC operating system does not detect STM32 in DFU mode. Is it a driver or MAC support? Looking forward for your help as we and our customers are really in need of using the DFU. Should you need more information, I can send you screen shots.ThanksWould appreciate @Houda GHABRI @Ben K helps if you can comment based on recent posts I see in other forum posts.

Hi all, I need to generate a DAC output which is operating on 2 quadrants and the quadrants may be asymmetrical with respect to both the duty cycle and the amplitude. Attached a picture which better explains what I need. MCU STM32F446RE DAC OUT1 on pin PA4 - triggered by TIM6 DMA channel 1 stream 5 PWM out: TIM1 CH3 with output on pin PA10 frequency range: 10-500Hz (frequency of the DAC waveform) The PWM output is controlling the polarity while the DAC is controlling the output amplitude. The polarity must be changed when the DAC output completes 1 cycle. I need ideas on how to implement it. Since the DAC output is asymmetric I don't know how to create the LUT: should I create a complete LUT with both the quadrants or should I change the LUT array at the polarity change ? In the first case I don't know how to trigger the PWM output in sync with the DAC waveform while, in the second case, I don't know if I have enough tim

Hello,I have a problem on a STM32H753 which I do not understand.I want to sample some data from ADC with a given time period.So I use the TIM2_TRGO as Event generator for the ADC3 (via EXTSEL)ADC3 is configured in 12 Bit single conversion, in the sequence register there is only one entry, the length ist 1.TIM2 is configured in a way that it generates an Event each 4msFor Data transfer I use the DMA1_Stream0The corresponding DMAMUX channel is set to 115 accordingly.On the ADC input Pin I provide a sinus signal.For debugging reasons I initialise my RAM array with 1.When the transfer is complete, I see in the Data Array that there are missing some data.One result for example: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2252, 2283, 2

Hi，I am using the PWM1 mode of the STM32G031 TIM1 and I noticed that the rising and falling edge time of its PWM output is about 20 ns. I have used the PWM fast mode but this time is not getting shorter. I would like to know if this time is normal? Because if I use the GPIO output mode to flip the output directly, this time can be as fast as 10nsThanks. 

Hello Team,Want to use systick timer for time base of 1uS without interrupt. Please help me on this to configure it without interrupt. Regards,Sachin N 

Hello, I am using STM32H7 dual core series. Currently I am planning to enable FreeRTOS in M4 core and let M7 core run in regular fashion. As FreeRTOS uses SysTick, I have given M4 core on of the controller timer. Is there any need to also give M7 core a different timer? As M7 core is not running FreeRTOS, can it continue running on SysTick timer. -Regards

Hi experts,I'm adding to my existing code (that runs on a STM32F105) a function to store a word in the flash.I basically copied the code from the official example based on the HAL libraries, here my function:uint32_t FLASH_Write_Data(uint32_t StartPageAddress, uint32_t *Data, uint16_t NWords) { static FLASH_EraseInitTypeDef EraseInitStruct; uint32_t PageError; /* Unlock the Flash memory to enable the flash control register access */ HAL_FLASH_Unlock(); /* Erase the FLASH area*/ EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES; EraseInitStruct.PageAddress = FLASH_USER_START_ADDR; EraseInitStruct.NbPages = (FLASH_USER_END_ADDR - FLASH_USER_START_ADDR) / FLASH_PAGE_SIZE; if (HAL_FLASHEx_Erase(&EraseInitStruct, &P

HI,I would like to use the speaker output on the STM32H563ZIT6. I reviewed the wiki, but there aren't any references about how to play audio with the speaker output. Is it possible to enable this output to play audio?Does the STM32H563ZIT6 have built-in capability to directly convert this digital data to an analog signal for speakers without using an external CS43L22 DAC (Digital-to-Analog Converter)?Regards,Berlin

Might need your help to solve this issue. Thank you. Background: 1. I have a 1 Hz signal, and I'd need this signal to trigger interrupt. 2. Use GPIO as interrupt. 3. Using STM32CUBEMX to generate codes. 4. STM32F769I-EVAL board. 5. Already successfully using PE1 on EXTI1_IRQn, but when I need to add EXTI15_10 in my system. The issue comes. Questions: 1. I can't find which step or setting is incorrect from Set_GPIO() and EXTI15_10_IRQHandler(); 2. It can't work, it does not go into EXTI15_10_IRQHandler. My codes regarding STM32CUBEMX example. void Set_SPI1(void) { GPIO_InitTypeDef GPIO_InitStruct; __HAL_RCC_GPIOE_CLK_ENABLE(); // SPI DR GPIO pin as input floating GPIO_InitStruct.Pin = GPIO_PIN_1; GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOE, &GPIO_InitStruct); // Enable and set

I am using the STM32 G431RBT6 chip. There is a circuit for measuring voltage, current, and other parameters.When the circuit is not connected to the chip, the voltage divider works perfectly. However, when the circuit is connected to the chip (with the code uploaded), the voltage readings are incorrect (for example, 50V reads as 40V), and this issue occurs inconsistently across channels.It is important to note that this discrepancy is not due to incorrect ADC results, but the voltage divider output itself is incorrect. The ADC channels are configured with no pull.What could be causing this issue, and how can I resolve it?

Hi,I am working on a project on STM32H750. I set up the QSPI I/O pins on PD11, PD12, PD13 and PE2. Because PE2 (IO2) also serves as the WP# pin for the external flash, I would like to set it to have an internal pull-up, so the GPIO definitions are like:    //PE2-- QUADSPI_BK1_IO2    GPIO_Initure.Pin=GPIO_PIN_2;    GPIO_Initure.Mode=GPIO_MODE_AF_PP;      GPIO_Initure.Pull=GPIO_PULLUP;                 GPIO_Initure.Speed=GPIO_SPEED_FREQ_VERY_HIGH;    GPIO_Initure.Alternate=GPIO_AF9_QUADSPI;      HAL_GPIO_Init(GPIOE,&GPIO_Initure); However, even with GPIO_PULLUP, the pin still stays low after initialization. Did I miss some other set up? How can I set it to have an internal pull-up? App

I'm new to STM parts and toolchain and I need to send input capture values from TIM1 to the DAC output via DMA. Cube doesn't support peripheral to peripheral DMA, but its been suggested I can accomplish it with a peripheral to memory DMA transfer, triggered by TIM1\CH4 if I supply the address of the DHR12RD register as a destination address. The user guide says this register is not memory mapped, but I can see what address is from the generated code. What happens if I attempt this? Is there another way to do it?Also, the DAC is 12 bit and TIM1 is 16 bit, so I'm hoping the top four bits are simply ignored. Since the above method is non-standard, I'm not sure if this could make things not work. Under normal functioning, the capture registers will not record values above 4096, so overflows are not anticipated.

I need to use DMA to forward input capture values from the timers to the DAC output register. The input capture values represent the period of the input signal, which makes it work as an FM demodulator. If I can route the captured values to DACs and other peripherals, I can process more channels and use higher carrier frequencies. I’ve tried to do this before, but couldn’t make it work.  This process may end up gating the application so I'm trying again.  I've received bits of advice, but nothing worked.  I still don't know if is even possible. I'd basically need working code to confirm since I can't figure it out. Also, I attempted this process on an STM32L4...and I'm not sure if behavior might differ from unit to unit.  I'm considering switching to a unit with more timers, so I'm not sure if DMA behavior will be substantively different.  

I'm using CubeMX. With the new unit, I had to set ENVR and clear HIZ in VREFBUF_CSR in user code in order to use the internal reference.  In this config, I can see the output value change DC level, but with a 700khz noise tone on it that amplifies along with the DC level. It reaches 1v peak to peak when the DAC is outputting the max value.Are there settings that could end up causing this behavior?

I’m using an STM32G473 and I have TIM20 CHANNEL1 configured in output compare mode. When the compare value is reached, I want to move CNT values from TIM1, TIM5, TIM6, TIM7 and TIM15 to 5 static locations in memory.I’m not sure if I can use DMA to streamline this. I’m using CubeMX and HAL and I’m looking for examples of something like this, but so far I only see DMA examples for transferring to and from the triggering peripheral. Can DMA do this?

I need to load the TIM1 CCR registers into the DAC1 outputs on an STML432KC. I have this working with the line DAC1->DHR12R1 = TIM1->CCRx executing in a loop. I'd like to substitute with DMA. Others have suggested that I can do this with the available DMA features and supplying the the necessary register addresses. I gave it a shot and couldn't make it work. However, this is my first STM32 project, and I'm new to the toolchain. Is this approach really viable?

I began using an STM32G473 and the DAC outputs are acting funny. I have VREFBUF configured as an internal reference. Since I'm not using VREF+ as an output, I left the pin unconnected. I posted a thread about it and it was recommended that I connect VREF+ through a cap to ground.  I'm working with a custom board where this isn't possible so I can't test.I haven't found anything in the documentation that would suggest leaving the VREF+ pin unconnected would have ill effects on DAC outputs. Is this documented anywhere? Original thread:https://community.st.com/t5/stm32-mcus-products/triangle-wave-dac-output-on-stm32g473-seems-to-be-stuck-enabled/m-p/659118#M240313

I’m using CubeIDE, which lets me configure a timer to trigger a DMA request triggered by an output compare that transfers that timer's value to memory. I want to modify the generated code such that a separate timer’s value is sent to memory instead.Within the HAL_TIM_OC_Start_DMA function, HAL_DMA_Start_IT is called, (??) which seems to be where the to\from addresses are established. I’m hoping I can modify this call to reference the memory location of another timer’s CNT value…but I’m not certain if its as simple as modifying a single call. I’m up against other anomalous behavior, so I’m not sure if this approach works. Can it?

I am using CubeIDE, and I want an output compare event on TIM8 CH1 to trigger a DMA transfer to a single memory location. I’ve selected ‘Peripheral to Memory’ as the direction, but I’m observing the contents of the memory location being copied to the CCR1 register instead of the other way around. This also happens in ‘Memory to Peripheral’ mode, which would be expected to have opposite behavior.Using ST-link, I can seed the DMA1 registers configured in peripheral to memory mode:DIR = 0 (Per documentation this is correct)CMAR register maps to 0x40013434, which is the TIM8->CCR1 address. (Should be the memory address though)CPAR = 0x20000000 This maps to the base address of the SRAM section. This should be the peripheral address.If I switch to memory to peripheral mode, see the contents of the CMAR and CPAR registers switch, but I also see DIR switch so the two changes together seem like they may be cancelling to enable only memory to peripheral beha

I seem to remember a way to make a reset event set a timer’s value to a non-zero value. However, I didn’t see anything in the docs for the part I’m using so I’m not sure if this is a feature in STM32 parts. Is it?An alternative is a DMA trigger on the reset that loads the CNT value. Is there a better way?I have an in input capture value that represents a signed value. If a 16 bit timer resets to a value above 65535/2, input capture values within a known range can be sent away via DMA to the FMAC without processing steps to sort out the sign.