STM32 MCUs Products

Hi, I have an STM32F407-DISC1 connected to an Raspberry PI via I2S. The clock frequency is about 3MHz. The STM is receiving as slave on I2S2 and feeding data to a ring buffer. When the ring buffer is half full transmission on I2S3 is started (as slave). I meassure the timing between the two DMAs with __HAL_DMA_GET_COUNTER(hi2s2.hdmarx) and __HAL_DMA_GET_COUNTER(hi2s3.hdmatx). With this approach I am expecting to have a constant delay of one half buffer length between the two channels but the delay are slowly decreasing. Does anyone know why this is h

I want to make a communication between 2 microcontrollers by can protocol i put after each microcontroller  a can transceiver and the problem is that we send data but i other board we don't receive it, i mean after the second receiver we don't have proper output in RX,TX even it's CANH,CANL input of transceiver is ok and the transceiver doesn't have problem because i changed them but the problem remain! and i archived the codes if you want to take look...if you know where the problem is pls tell me. 

Hi,   I first worked with CAN with STM32H563 with normal mode. It worked. Later Again I tried it is not working with same code. Loop back mode is working fine. I would like to use other pins for CAN since I am using PD0 and PD1. May I know which pins are good for working with CAN. Please find the attached code and let me know if there any issues in the code.   Thanks & Regards, Keerthi

Hi, we are evaluating STM32L4A6VGT6TR, with our new product prototype. We are only suppling one 3.3V to the MCU as it requires. We have already included discharge circuit, and we can see this 3.3V rail will be completely discharged within 0.288s. However, the MCU cannot every time come up again (loading firmware), if we power cycle within 3 seconds. If we wait for 10 seconds before we turn on the power again, it seems to work OK. We are not sure if we are missing any special requirement regarding power cycle, power sequence about power supply, or critical pins, such as reset. Do you have any inspiration what that could be? Thanks

Hi,I am using STM32G474RET6 controller and would like to send and receive data in classic mode. I have configured all necessary parameters using cubemx but the hard fault occured when I call this function HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan1, &TxHeader, TxData).The CAN termination is connected properly.Following are my configuration settings:

Hello,I'm trying to port the example found here: https://blog.embeddedexpert.io/?p=1680 to NUCLEO-U385RG-Q.The example in the link is for STM32F411. I've successfully tried the example.Verbatim port of the code leads to USEF being set in GPDMA_C0SR.There are some unclear things about GPDMA:Reading generated HAL code: when memory-to-peripheral is chosen, DREQ bit is set in GPDMA_CxTR2, otherwise, SWREQ is set. I can't make sense of this fact and documentation given in RM0487.To achieve circular mode (i.e. setting CIRC bit in DMA_SxCR for STM32F411) do I have to use linked-list mode?I can imagine a linked list of length one pointing back to itself. Or does it have to be linked list of length two (First element is for setting GPIO bit, second element is for resetting GPIO b

I have designed a board with a STM32H573 and a KSZ8081RNACA PHY. As soon as I enable ETH clocks the ETH_DMAMR:SWR bit gets set.Verified:1. The 50 MHz clock from the PHY is present and stable (oscilloscope) at PA12. GPIO PA1 is configured for AF11, NOPUPD, SPEED100 as well as all other RMII pins PA2; PA5, PA7, PB12, PB15,PC1,PC4 and PC53. HCLK is stable 250MHz4. Tried forced ETH reset before and after clock enable.5. Tried to add delays after clock enable6. Tried to enable ETH clocks one by one or together7. MDIO is working and all ETH registers are writable8. I can see traffic on RXD0 (oscilloscope)If I ignore the set SWR bit I can continue but I never get a ETH interrupt.I am out of ideas and did not find anything in the errata about it. On a STM32H753 I used for another project a compensation cell bit needed to be set but I dont find this for the STM32H573.

I used the example code in RM, and room temperature is arround 31℃，the ADC value is 10644, calculated temperaure is 4127,  does it means 41.27℃？what will happen if minus temperature?/* Temperature sensor calibration value address */#define TEMP130_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FF8007E))#define TEMP30_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FF8007A))#define VDD_CALIB ((uint16_t) (300))#define VDD_APPLI ((uint16_t) (330))int32_t ComputeTemperature(int32_t measure){int32_t temperature;temperature = ((measure * VDD_APPLI / VDD_CALIB) - (int32_t) *TEMP30_CAL_ADDR ) ;temperature = temperature * (int32_t)(130 - 30);temperature = temperature / (int32_t)(*TEMP130_CAL_ADDR - *TEMP30_CAL_ADDR);temperature = temperature + 30;return(temperature);}

I have an odd issue.  I am setting up a timer compare channel for a 5ms delay in the future.  I set the counter to 0, set the compare value to 5ms in the future.  The compare interrupt does not occur, until the timer wraps all the way around and passes the compare value for a second time.  It passes the compare value the first time with no interrupt.Setup is:  STM32H753 (on custom HW), TIM2, Ch1/Ch2 used for PWM input capture. Ch3 used for timeout if IC does not occur.  All setup is using STM32Cube MX.  See code below.  The timers are started with the following code:The idea is that the PWM input rising edge on Ch1 will reset the counter every cycle (1kHz), but if the counter does not get reset due to no PWM input signal for 5ms, Ch3 compare happens.  Everything works as expected except if there is no input signal from the start, the timeout takes a full timer roller over, instead of 5ms, then is always 5ms after that! 

Hi all,I'm working on a very low power custom board powered by a STM32C011D6Y micro controller. I must read an ADC input routed to F1 ball (PA3, PA4, PA5 or PA6) but I'm measuring some strange power consumption related to the input voltage on the pin.For example: - I configure PA5 as ADC_IN5 - I wire F1 directly to an external signal generatorWhen I inject with the signal generator about GND or Vdd (about 3V) on the ADC input pin, the board's power consumption seems to be fine. When I set the input voltage about at half scale (about 1.5V) I measure about 500 uA on the power supply side.All the other ports are set as analog inputs with no pulls.Trying to figure out the problem I tried to configure other ports, for example PA3 as ADC1_IN3 on the same ball but the power consumption is exactly the same. I also tried to rewire the board so that the analog input is connected to ball E2

Hi there,I am using the full featured USART in LIN mode. The start of a LIN packet is signaled by a BREAK condition. The next byte is the SYNC (0x55). After the BREAK is detected, I enable the receiver timeout so that if the SYNC (0x55) is not received then the LIN reception must restart. This does not happen, i.e. after a BREAK with no other bytes, it does not generate a receive timeout.According to the RM, the receiver timeout starts after a valid STOP. So is the end of a BREAK not considered a valid STOP and therefore the receive timeout does not start?Thanks in advance,Pieterhttps://piconomix.com

Hello everyone,I’m working on a project where I am using STM32F407 and I’m trying to establish USB communication between my STM32F407 Discovery board and a PC. I have configured the board for USB_OTG_FS in STM32CubeMX, and I’m trying to use it as a Virtual COM Port (VCP). However, when I connect the board to the PC using the USB_FS port, it’s not being recognized as a COM port or any device at all in the Device Manager.I want to read the output of the ADC channels using the hercules software I would really appreciate any suggestions or guidance on:Getting the board to show up as a VCP in the Device Manager.Troubleshooting USB enumeration issues.

Hello,I am trying to build a part of the project.I want my three microcontrollers to communicate with each other via CANBus.What i am trying to achieve in this part is reading the digital sensor value from my hall effect sensor and sending this information to the other controller but for now just to see if it is working i am using a Waveshare USB-CAN A,CANBus adapter before conencting the second controller to observe if the project is working so far.I am using a MCP 2551 transcevier and I also connected the 120 ohm resistor between the CAN H and CAN L.I checked the resistance with my multimeter and I get 60 ohms in between them,as i should. The problem is when I click the debugger even the LED that i connected to test how far my code goes in debug never lights up.It doesn't even blink for the first line of code int main().I don't understand the reason behind it.It might be about the CAN and adapter settings,clock configuration etc. but i can't tell for sure.Just t

Hello,I noticed in the document RM0368 (Rev 6) for F401RE the SPI Register map (Table 93 page 611) is missing the SPI_CR2 register.I came across this topic, created in 2021 and now closed :https://community.st.com/t5/stm32-mcus-products/error-in-rm0368-reference-manual-spi-register-map-or-i-miss/m-p/225332This topic was about Rev 5, and the problem should have been fixed in Rev 6. Is my Rev 6 a too old document and it was patched in later revisions or is it still in the latest revisions as it appears that REV 6 is the latest version of RM0368 according to the F401RE product page :https://www.st.com/en/microcontrollers-microprocessors/stm32f401

Hello STM32 Community,I'm trying to implement CAN communication on my Nucleo F446RE board and I'm facing some challenges getting it to work properly. I've attached screenshots of my .ioc configuration and the auto-generated code from STM32CubeIDE for reference.Current Setup

Hi everyone, I'm trying to generate a sine wave using PWM output updated by GPDMA transfer on an STM32H5 device. I'm following this tutorial:STM32 Change PWM Duty Cycle With DMA For Sine Wave Generation However, when I try to implement it with STM32H5 (which uses GPDMA instead of classical DMA), I can't get any output at all or get the PWM to update properly. My Goal: Generate a continuous PWM output.Update the duty cycle from a sine wave lookup table stored in memory.

Can we  keep VDD33USB keep NC if USB feature not using In STM32H753ZIT6?If kept NC what may go wrong? 

STM32World Rant #2 - MYSTERIOUS UNKNOWN MCUJust a short rant about the MYSTERIOUS STM32F402. This MCU does NOT exist in ST's catalog, and yet you can readily buy them in China. In this video I will go through the datasheet, find a comparable MCU which exists and compare them.#STM32 #China #MCU #STM32Worldhttps://www.youtube.com/watch?v=ILUuB6Kaz5U

Hi,I'm looking at implementing USB on my the NUCLEO-64 STM32F303RE EVAL BRD, with of course the STM32F303RE microcontroller. I'm having issues understanding what alternate function is needed for the USB-DM and DP pins. In the datasheet https://www.st.com/resource/en/datasheet/stm32f303re.pdf Table 13 shows that the USB pins are "Additional Functions" on PA11/PA12. I'm not sure what that means? Additionally I'm used to going to Table 14 the alternate function table to see what AF is needed on those 2 pins for USB. However in Table 14 the USB_DM and USB_DP are no where to be found. Your help would be appreciated. Thanks

Hello, I have the following problem - I configured TIM2 of STM32H723 in Encoder Mode following all recommendations in the Reference Manual RM0468, chapter Encoder Interface Mode, p. 1694: • CC1S= 01 (TIMx_CCMR1 register, TI1FP1 mapped on TI1)• CC2S= 01 (TIMx_CCMR2 register, TI2FP2 mapped on TI2)• CC1P and CC1NP = ‘0’ (TIMx_CCER register, TI1FP1 noninverted, TI1FP1=TI1)• CC2P and CC2NP = ‘0’ (TIMx_CCER register, TI2FP2 noninverted, TI2FP2=TI2)• SMS= 011 (TIMx_SMCR register, both inputs are active on both rising and fallingedges)• CEN= 1 (TIMx_CR1 register, Counter is enabled) I also checked these settings in the TIM2 registers in debug mode with halting the micro and they were exactly as recommended. I checked the input quadrature signals - they are there. But still the TIM2 counter value stays 0 and does not change. Any ideas what I might be missing? Thanks a lot, Radek

I am new with the STM32 MCU and this is my first projectI am using a STM32F407VGT6I started a project that read a 16bit parallel on PDx GPIO. The data is placed by an external device and a signal is set to low for 400ns. I connected that signal on PB1 and enable an interrupt on it.The code inside the interrupt:1 - set output pin PC9 to 02 - read the GPIOD (al 16 bit)3 - shift once (divide by 2)4 - output the result into the MCU DAC.5 - set output pin PC9 to 0I use PC9 on an oscilloscope to see how much each line of code is taking.And I am very surprised by how slow the code is running at.First, it take 6us for the interruption to be triggeredThen 3us to read PDx registry1us to shift 4us to output to DACI was hopping the interrupt would be much faster. At least to read the PDx registry within the 400ns. 400s is the time I have to read the GPIO. This is how

Hi,I used to run my STM32F303RE at 72Mhz clock from a 8Mhz CMOS oscillator. . Timers8/1 operated at 72Mhz as well. That worked fine. I had to change the CMOS oscillator from 8 to 24Mhz.I tried two modifications, see attachment:a) I changed PLLMul from x9 to x3 and left PREDiv. at /1.b) I changed PREDiv to /3 and left PLLMul at x9.In both cases CubeIDE clocktree was fine with the setup, 72Mhz imput clock at Timers8/1.Eventually now the input clock of the timers is low by factor 9, it is 8Mhz. What did I miss?Thank you.CheersDetlef 

Hey, I just want to report an error in the Reference Manual for the STM32F411xC/E microcontroller.Reference Manual: https://www.st.com/resource/en/reference_manual/rm0383-stm32f411xce-advanced-armbased-32bit-mcus-stmicroelectronics.pdfPublished on: https://www.st.com/en/microcontrollers-microprocessors/stm32f411/documentation.htmlError Description:The error is in "Table 26. GPIO register map and reset values" on page 163. I recognized that the bit representation of the "Reset value" of the GPIOA_MODER register (the first one in Table 26) doesn't match with the value written on page 157.I think it got copied from the Chinese vers

Hi all.I have this piece of code: __HAL_RCC_CORDIC_CLK_ENABLE(); CORDIC->CSR |= CORDIC_CSR_NARGS; CORDIC->CSR |= (CORDIC_CSR_PRECISION_3 | CORDIC_CSR_PRECISION_2 | CORDIC_CSR_PRECISION_1 | CORDIC_CSR_PRECISION_0); CORDIC->CSR |= CORDIC_CSR_FUNC_1; // Phase function (atan2) int32_t a = 1000; int32_t b = 1000; CORDIC->WDATA = a; CORDIC->WDATA = b; volatile double result_from_hw = (double)CORDIC->RDATA / 2147483648.0 * 180.0; volatile double result_from_sw = ((atan2((double)a, (double)b)) / M_PI) * (180.0); __NOP(); __NOP(); __NOP();The result from SW is 45 (as expected).However the result from HW is 43.2.WHY??

Software tool: IAR Workbench 9.60#include <stdio.h>#include <math.h>#include <stdlib.h>#include <string.h>#include <intrinsics.h>int putchar( int ch ){    while(!(USART2->ISR&0X0080));   USART2->TDR  = (unsigned char)ch; return ch;} test code:printf("%d\n",ADC_array[0]);printf("%f\n",1.234567); Output on computer:62615       ----correct%f             ----incorrect(should output 1.234567)