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Writing 256 bytes ( full mailbox message ) failes when using I2C in DMA mode. I think the max is 255, correct me if I am wrong.Any way I can write it using 2 messages safely? Or am I restricted to non-DMA I2C write only?

Hi,I am a bit confused about re-join request process on the lora STM32WL. I want to make my end node will join request to the gateway for five times when the join accepted process is not happening. After five times the join request process and end node failed to join accepted, then the system enters stop 2 mode (idle by default firmware package STM32WL).Is there any reference or information about it ? Maybe, how to implement my need on LoRaWAN End Node STM32WL program ?I really appreciate your attention, thank you.

I have a project that is using DMA channels to transfer ADC values to DTCM. The values seem to be getting to the memory correctly but I was confused by Figure 1 of the datasheet which shows the ADC/DMA/SRAM on the AHB but the DTCM on a bus that appears to be disconnected from the AHB -> https://www.st.com/resource/en/reference_manual/rm0410-stm32f76xxx-and-stm32f77xxx-advanced-armbased-32bit-mcus-stmicroelectronics.pdf What is the path the data is taking from the ADC to the DTCM? Is there any timing penalty from the data taking this path?  

Hello, I am trying to write a routine, that takes an array of structures as input and sets the timer 1 parameters. This function is called after each overflow of timer 1. I turn off the respective channels, then set the parameters, as seen in the following ISR: void TIM1_UP_TIM16_IRQHandler(void){htim1.Instance->CCER &= ~(TIM_CCER_CC1E | TIM_CCER_CC1NE | TIM_CCER_CC2E | TIM_CCER_CC2NE | TIM_CCER_CC3E | TIM_CCER_CC3NE);HAL_GPIO_WritePin(TIM1_UP_GPIO_Port, TIM1_UP_Pin, GPIO_PIN_SET);HAL_TIM_IRQHandler(&htim1);HAL_GPIO_WritePin(TIM1_UP_GPIO_Port, TIM1_UP_Pin, GPIO_PIN_RESET); if (currentPattern < NUM_PATTERNS) {setconfig(&durations[currentPattern]);currentPattern++;} The setconfig function looks as follows::void setconfig(TIM_SU const* const timersetup) {// Function that takes a pointer to a TIM_SU structure as an argumenthtim2.Instance->ARR = timersetup->tim2_period; // Period of timer 1, i.e. the duration of the second pulsehtim1.Instance->

Hi,I want to know the difference between IIS3DWB and ISM330DLC.Why we are calling IIS3DWB as vibration sensor while ISM330DLC has accelerometer inside with the same specifications as in IIS3DWB? Which is better in monitoring the vibration in motors?Thanks

could someone explain how this chip works this function table is so confusing to me 

I want to let the LIS2DH12 FIFO fill and wrap freely and then at a point in time access the history (LIS2DH12 contents) in a particular manner.  I want to first read the newest 15 samples (in any order) and then read the oldest 15 (in any order).  I need to compare the average of the older 15 to the average of the newer 15.  Can this be done?Background ...I am designing a camera and I'm using a sensor that doesn't have anti-shake.  I've included an LIS2DH12 on the PCB.  The theory is that I can look through the acceleration data and detect shake (motion jerks).  If I see the new readings average is significantly different from the old average then I will know a jerk has happened.  I will keep taking captures from the sensor until I see that there were no jerks during the capture. I tried just averaging the acceleration vector magnitude (sum of squares) across all samples and use a threshold as a jerk detection.  Unfortunately I couldn't

 I'm having some trouble setting up ADC1 on an STM32F401CEU6 to use DMA and pacing the conversions with a timer.I want to use 2 channels in scan mode with each ADC channel doing conversion every other time the timer triggers the channel. In other words, for each rising edge of TRGO I want the channels to be sampled and converted in an interleaved fashion.I have  timer3 set to 16 kHz and I verified its output by enabling channel 2 to go to pin PA7. I verified with a scope that the output has edges at the 16 kHz rate. Channel 1 is set to PWM with no output.With ADC1 set up as follows:Scan Conversion Mode: EnabledContinuous Conversion Mode: DisabledDiscontinuous  Conversion Mode: DisabledDMA Continuous Requests: Enabled: I see data being transferred to the buffer and channels 0 and 1 are being sampled, but sample rate isn't 8 kHz per channel. I verified this with a 1Khz square wave being fed into ADC0 and I see a varying number of high and low samples. I should see 8 s

Is it possible to burst transfer a block of data from STM32 internal Flash/SRAM to an external memory mapped peripheral device with an SRAM style interface i.e. Address, Data, CS and R/W using the FMC fed via DMA?

Hello, all, and Happy New Year!I'm trying to design my first microprocessor board. I'm trying to follow the guide given by Phil's Lab on YouTube, at https://youtu.be/nkHFoxe0mrU?si=Dx6cx6-a9yXncmEW, which I find very helpful. I'm using an STM32L010K4Tx in a device that is primarily a timer.I'm not sure I need them, but I wanted to install a High Speed External crystal (HSE) and a Low Speed External crystal (LSE). In the STM32CubeIDE, I have a STM32L010K4Tx set up, and from the Pinout & Configuration Tab, I can select System Core -> RCC. Under RCC Mode and Configuration, I select High Speed Clock (HSE) and for Low Speed Clock (LSE), I select "Crystal/Ceramic Resonator." The pinout diagram seems to show pin 2:RCC_OSC32_IN and pin 3: SCC_OSC32_OUT, which is where I believe that I should connect either side of the HSE crystal and its capacitors. There's also pin 6: RCC_CK_IN but no RCC_CK_OUT pin.Can someone help me configure the STM32L010K4 to include a LSE crystal or ceramic reson

Hello, I have been trying to make a driver for the Winbond(W25N01GV)  NAND flash over QSPI(to use it in memory-mapped mode) but I've been failing so far. Can somebody give me some ideas about what I am doing wrong? I used W25Q256 before, but now I want to replace it with W25N01. PS: If you know any working qspi driver I would be happy to send me the link.

Hello . I need to make a device for testing car headlights. I'm going to turn them on and check if all the lights are working. new models of car headlights work via can bus and lin. what stm32 will I need and what components. the device is supposed to send can bus or lin signals to the headlamp to turn it on.This is https://youtu.be/pWKM9b7_jAM?feature=shared

I'm using system bootloader to write to flash memory on NUCLEO-H503RB evaluation board. The interface used is UART. I received ACK confirmation (0x79) for every command I sent: UART bootloader activation (0x7F), Extended Erase Memory (0x44) and multiple Write Memory commands (0x31). I'm writing about 58K to flash. When I checked what was actually written I found out that only first 600 (!?) bytes are correct but all the rest bytes are 0xFF's! Do you have any idea what the problem is? Only thing I noticed that first 600 bytes are actually vector table (150 pointers x 4 byte per pointer). So, vector table is written well, but all other bytes are not, even though I received ACK confirmation for every command.Some background information. I'm doing this programming with other STM32 microcontroller (to be precise it is STM32H765). I'm reading HEX file from the SD card. I checked every step of programming. Did I read correct bytes from the file on SD card? Yes. Did I write each and every byte

Hey, I'm following the Getting started tutorial and have some troubles at the chapter "Modify, rebuild and reload the Linux kernel":https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP1_boards/STM32MP157x-DK2/Develop_on_Arm%C2%AE_Cortex%C2%AE-A7/Modify,_rebuild_and_reload_the_Linux%C2%AE_kernel Everything works up until Building the Linux images withmake ARCH=arm uImage vmlinux dtbs LOADADDR=0xC2000040This creates the following error:CALL scripts/checksyscalls.shCC drivers/clk/clk-scmi.odrivers/clk/clk-scmi.c: In function ‘scmi_clk_round_rate_get’:drivers/clk/clk-scmi.c:49:33: error: ‘const struct scmi_clk_proto_ops’ has no member named ‘round_rate_get’49 | ret = scmi_proto_clk_ops->round_rate_get(clk->ph, clk->id, &round_rate);| ^~drivers/clk/clk-scmi.c: In function ‘scmi_clk_get_duty_cycle’:drivers/clk/clk-scmi.c:61:33: error: ‘const struct scmi_clk_proto_ops’ has no member named ‘get_duty_cycle’61 | ret = scmi_proto_clk_ops->get_duty_cycle(clk->ph,

Do you think that it is common for the function bellow (arraySize = 32) to take approximately 125us to execute? The for loop is the main problem as it takes almost 120us to execute.I am using STM32G474ret6u MCU, with clock at 170Mhz? Also the optimization is set to -03.Does anyone have any idea in which direction should I go to optimize it? Should I examine the assembler code, or try to use some peripheral like FMAC?const float reComponent[32] = {1.000000, 0.923880, 0.707107, 0.382683, 0.000000, -0.382683, -0.707107, -0.923880, -1.000000, -0.923880, -0.707107, -0.382683, -0.000000, 0.382683, 0.707107, 0.923880, 1.000000, 0.923880, 0.707107, 0.382683, 0.000000, -0.382683,-0.707107, -0.923880, -1.000000, -0.923880, -0.707107, -0.382683, -0.000000, 0.382683, 0.707107, 0.923880 }; const float imComponent[32] = {0.000000, 0.382683, 0.707107, 0.923880, 1.000000, 0.923880, 0.707107, 0.382683, 0.000000, -0.382683, -0.707107, -0.923880, -1.000000, -0.923880, -0.707107, -0.382683, -0.00

I'm trying to get the LPUART working with BDMA on a STM32H7A3 MCU.  Eventually I'd like to set it up so the MCU goes into a low power state and wakes up when it receives a LF character match in the incoming message, but for now I'm just trying to get a small test program working starting with just transmitting some bytes using BDMA.  I have DMA with character match working on a regular UART with DMA and I'm using that code as an example along with the reference manual sections on the LPUART and BDMA. I think I'm doing everything the reference manual says to do but maybe I missed or misunderstood something. I can send characters out the LPUART without DMA and see them show up on my logic analyzer but when I try to do a BDMA transmit, nothing shows up on the LPUART_TX line to trigger the logic analyzer.I've read this article ( https://community.st.com/t5/stm32-mcus/dma-is-not-working-on-stm32h7-devices/ta-p/49498 ) many times and it seems pretty clear I should be making su

I am using STVD IDE to write code for STM8 the compiler I am using is Cosmic STM8 C compiler and the standard peripheral library provided for STM8. The problem I have is while evaluating and if statement for and input pin, if the condition is "== 0" or "== RESET" like the below code the code behaves properly, and the condition is evaluated successfully.```if(GPIO_ReadInputPin(GPIOC,GPIO_PIN_2) == RESET)if(GPIO_ReadInputPin(GPIOC,GPIO_PIN_2) == 0)```But when evaluation the if statement with "== 1" or "== SET" as shown below the condition is never met despite measuring high (3.3V) on the actual input itself```if(GPIO_ReadInputPin(GPIOC,GPIO_PIN_2) == SET)if(GPIO_ReadInputPin(GPIOC,GPIO_PIN_2) == 1)```I managed to make a workaround that by making the condition "!= 0" or "!= RESET" as shown below it is evaluated successfully and the code behaves properly, but I don't really understand why it works with "!= 0" or "!= and not with "== 0" or "== RESET", does it has anything to do with the com

Hello,STM32G474RE is the processor model I use.I read ADC from pin PA3 and I read IO from pin PC5. So whether these pins are common pins in the processor hardware? How can I separate these two pins from each other?

Find GP850 Datasheet

Hi, I have use MX to generate code for this timer.  The generated code is as follows: static void MX_TIM2_Init(void){ /* USER CODE BEGIN TIM2_Init 0 */ /* USER CODE END TIM2_Init 0 */ TIM_ClockConfigTypeDef sClockSourceConfig = {0};TIM_MasterConfigTypeDef sMasterConfig = {0}; /* USER CODE BEGIN TIM2_Init 1 */ /* USER CODE END TIM2_Init 1 */htim2.Instance = TIM2;htim2.Init.Prescaler = 0;htim2.Init.CounterMode = TIM_COUNTERMODE_UP;htim2.Init.Period = 65535;htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;if (HAL_TIM_Base_Init(&htim2) != HAL_OK){Error_Handler();}sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK){Error_Handler();}sMasterConfig.MasterOutputTrigger = TIM_TRGO_ENABLE;sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK){Error_Handle

Hello,I'm having weird problems with code crashing, perhaps related to how I have IRAM1/IRAM2 set up in my project:Looking in the reference manual, I see that the SRAM starting at 0x2000_0000 is the DTCM_RAM on TCM interface (data RAM?), the SRAM starting at 0x2400_0000 is the D1 domain, AXI SRAM but I don't see any documentation for how big either of these are.  I also can't figure out what is meant in Keil by IRAM1 vs. IRAM2 (Google is not very helpful), although I suspect that question might not be within the scope of the STM forums...If anyone can help with this I will really appreciate it!Thanks,-Brian

https://drive.google.com/file/d/1slB_5LC5tWVdE61MoUpXk6XO0F--_Sts/view?usp=drive_link Hello,I use 1366*768 lcd in stm32h743iit6 with 50MHZ frequency and touch gfx. When I use value.setwildcard() and want to update a value on the screen it flickers ( the screen video is attached ). Would you please tell me what is happening? I have no idea. this is work and I have limited time to fix this.frame period  = 778     One line Scanning Period  =1446this is the link to watch the screen video.https://drive.google.com/file/d/1slB_5LC5tWVdE61MoUpXk6XO0F--_Sts/view?usp=drive_link

Hello   I have two STM Nucleo-WL55JC2 boards. I have tried running the SubGHz_Phy_PingPong example and it works flawlessly.  When observed using TeraTerm, I am only able to see the RSSI and the SNR values.  I also need to observe the latency of this communication (The time taken for the transmitted message to be received).  Kindly guide me through on how I could modify the SubGHz_Phy_PingPong example in order to observe this.  I am using STM32CubeIDE.   Thank You

Hello,STM32G474RE is the processor model I use.I read ADC from pin PA3 and I read IO from pin PC5. So whether these pins are common pins in the processor hardware? How can I separate these two pins from each other?

Hi,Currently, we are facing an accuracy problem when using the built-in DAC on the STM32F407 (with buffer enabled). As the built-in reference voltage measured 2.0005V, we set the DOR to 0x800, expecting to get 1.25V on the DAC output. However, we actually measured 1.238V, which is 122mV away from the ideal. All tests were made with the DAC under no load. As I've seen in datasheets and many posts, the mentioned DAC output range will be 0.2V~ (VDDA-0.2V) when the buffer is enabled. Could I suspect that the DAC output offset specification is within (IDEAL ±0.2V)? Given the 122mV error mentioned above, it's hard to estimate the output accuracy without any listed specifications to refer to. Overall, I think the built-in buffer actually works and is usable, but we really need more information about it to leverage it better.Thanks.