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I used one CR95HF demonstration board USB on computer ,it's work well, but : CR95HF.dll library ​CR95HFDLL_USBconnect() Returned value: lngStatus: 0: is connected  and ready to be used ; 1: not connected; I don't how to deal with 2 USB CR95HF on same one computer , how to identify the USB devices index by CR95HF.dll library support ?

My board is NUCLEO-H743ZI. I change the ST-LINK type from STM32 Debug+Mass storage+VCP to STM32 Debug+VCP.But after the change STM32CubeProgrammer can not detect the ST-LINK.It might be a hardware ID issue?The usb pid of STM32 Debug+Mass storage+VCP is 374B.STM32 Debug+VCP is 3752.

i want to control AC voltage using timer PWM mode ..reference zero crossing signal interrupt every rising edge of zero crossingfrequency of pwm signal (100Hz) some time frequency of AC mains very between 99-100Hz so i need to synchronize my timer with every rising edge of zero crossing how can i synchronize TIMER?

I'm trying to understand how I can use a USB Type-C connector together with the STM32MP1 USB OTG peripheral.So obviously I want to use the port in dual role configuration. I want to use the STUSB1600 for that because it takes care of the power source/sink control for me. But I do wonder how should I connect the OTG_ID pin (if at all) in the STM32MP1, should it be to the ATTACH pin of the STUSB1600? The eval and DK only use the micro connectors for OTG.I have found AN4775 and figure 9 (attached) explains how to use Type-C with OTG, but I'm not sure if that applies with the STUSB1600 because it takes care of the CC pins for me.So if someone could please help with figuring out dual role with Type-C connector, please.

i have file.c and i want to convert file.c from html file

Hello.I need a simple example for led blinking with SPC5 Studio and SPC560 series mcu.​thanks.

我现在使用一个DEMO-CR95HF-A usb在电脑上软件是没有问题的，但用两个ＵＳＢ连接时�?知�?�如何作开�?�区分，​CR95HFDLL_USBconnect Returned value: lngStatus: 0: is connected  and ready to be used ; 1: not connected; 如果是两�?�USB读�?�器如何区别是哪�?�USB？（if two or more USB connect ,how to deal with ?） 如何�?�?两�?�USB�?�时工作？ yes , I sucessed to connect 1 USB ​CR95HF for reading card, now I want connect 2 or more CR95HF demonstration board through USB on the 1 PC ,but ​CR95HFDLL_USBconnect can't return which USB port is connect , so how to identify the USB devices index??

On the STM32L072 series, the reset state of all the pins are "Analog mode", except for PA4, PA13 (SWDIO) and PA14 (SWCLK).When I put the STM32 into STOP mode, PA4 (configured as an input) causes the current consumption to increase by ~10uA. When I configure it as analog, the current consumption goes down to an acceptable 1.7uA (with 32 kHz crystal running).I would like to know why PA4 is configured as an input after reset. One of it's alternative functions are "DAC_OUT1"... could this be the reason?Thanks in advance,Pieter

In the manual, it states that it is better to change an input pin to analog to disable the Schmidt trigger input current consumption during STOP mode. How much does this save? Should the pull-up / pull-down be disabled too?If a GPIO pin is configured as an output, will this use more current than when it is configured as analog?If a GPIO pin is configured for an Alternative Function (input), does it use more current than when it is configured as analog?If a GPIO pin is configured for an Alternative Function, but the peripheral is not initialized, does it use more current?Thanks in advance,Pieter

Hello,When generating a project for STM32F746 Disco board a QSPI.mac is generated.This file contains instruction to load into RAM __hwReset(0);    __message "---- setup device ----" ; Reg = __readMemory32(0x40023838, "Memory"); // RCC.AHB3ENR enable QSPI Reg |= (0x02UL); __writeMemory32(Reg, 0x40023838, "Memory");....How is it generated ?How can we modify it as we uses different QUAD SPI on our target ?thanks for any supportbest regards

Hi, eMIOS unified channels have ODIS and ODISSL configuration. ODIS selects one of the four output disable input signals, as follows:00 = Output Disable Input 001 = Output Disable Input 110 = Output Disable Input 211 = Output Disable Input 3I have Discovery Kit for SPC56 with SPC560B54L5 MCU. Reference manual doesnt contain description of Output Disable input signals. How can i configure this signals?Best regards,Alex.

Hello. Which compilers I can use to write some program codes for the SPC560B50L5. ?I think the SPC5Studio only supports b54, b60 and b64 series. ​also has a sophisticated design.Is there any other easy to use compiler that supports this MCU?Thanks.​

Hello. I'm writing a led blinking code for SPC560B50 but after programming the code into mcu, the mcu takes high current about 300mA and damaging. My circuit and mcu don't have any problem before programming.

This function uint32_t LL_RTC_DATE_Get(RTC_TypeDef *RTCx) reads 4 times the DR(Date register) to take the date from RTC.After the first read, the shadow registers are unlocked (in case don't bypass them). The next three readings from DR register made without locked Shadow Registers. The workaround is not to use this function.

I want to configure USB+STM32f407vet6 as host-only and use in full speed mode.this schematic is correct ? thanks a lot

This part is mentioned in several places: AN4938, Rev 3​, http://www.openstm32.org/tiki-view_forum_thread.php?forumId=2&threadId=7657&comzone=show#threadId7657 but I can't find specifics on it.

I want to interface pen drive with STM32f407. Any example code for this?Using STM32F4xx_DSP_StdPeriph_Lib_V1.8.0 in my code.

When working with a STM32F030C8T6 board, communicating with another board through serial comms (115200bps), I suddenly started to get erroneous characters once in a while, when the remote board were sending data at the same time.It's a block protocol, with the remote board sending 256 byte blocks and the F030 board sending ACKs (hex 0x06) along the way.It had worked fine, when the ACK from the F030 was sent after a full block. When sending while there was still incoming data, the start bit of the outgoing data was suddenly shortened a bit, resulting in incorrect data being received in the remote end.The logic traces show this.Start bit + one bit should be 17.38us (bit time 8.68us), which can be seen to be correct in the "normal startbit" screenshot. In the "short startbit" screenshot, this time is only 12.62us.( I don't know if it's actually the startbit or the first bit that is corrupted, but assume it is the startbit). Following bits are all okay.This causes the 0x06 to be read as 0x

Hello,I have been tasked recently with porting some code from another microcontroller into the STM32H7. Right now I am taking care of the UART communication and some parts around that. And I would like opinions and advice about some things if possible.Since the architecture is quite a bit different and the clock is so high, I wanted to see how can I increase performance on previous implementations. Some targets will do quite a bit of math processing, while some will mostly communicate with multiple targets.I've been looking at the documentation of the memories and DMA as well as AN4891.Of note is that one target will be using ethernet.Previous implementations of UART communication simply had a TX and RX interrupt sending/filling a buffer. Some had some DMA for TX.My idea is to have:CPU only using DTCM if possible for data.CPU using ITCM for most (all?) ISRs.CPU running code from flash with cache on.This is to avoid cache misses which can happen (always?) during interrupts and to avoid

USART1 interrupt only receives one string, processes it well and returns it back as expected. But when i issue the second string, the check USART_IT_RXNE status flag is always false. I tried to reset it right after the preceeding string is sent but all in vain. Here is my code...Am using the tiny STM32F303K8void USART_puts(USART_TypeDef* usar_tx, volatile char* str) { while (*str) { while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {} USART_SendData(usar_tx, *str); str++; } }   void USART1_IRQHandler(void) { if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) { static int cnt = 0; char ch = USART_ReceiveData(USART1);   if (ch != '\r') { rcvd_str[cnt++] = ch; } else { rcvd_str[cnt] = '\r'; cnt = 0; USART_puts(USART1, rcvd_str); USART_ClearITPendingBit(USART1, USART_IT_RXNE); } } }What on earth am i doing wrong or missing.

I have a simple switch on an LED project on a homemade STM32F405 development board. I am using STM32 Cube-MX and It is all working OK and turns an LED on and off via a momentary switch on subsequent button presses. The problem is that on starting the program the externally connected LED starts off in the on state whereas I would like it to start in the off state. Here is the relevant section of my main.c code and I was wondering how I can change it to make this happen please? I am hoping that this code snippet is where it can be changed but I can post the whole main.c if required.while (1) { // https://www.youtube.com/watch?v=sWe4kvzLMjY if(HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_3) && tempVar) { // wait 5 ms HAL_Delay(5); HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5); tempVar = false; } else if(HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_3)==GPIO_PIN_RESET) { // wait 5 ms HAL_Delay(5); tempVar = true; }

Hi.I'm trying to use LSM6DSL sample code from "https://github.com/STMicroelectronics/STMems_Standard_C_drivers/tree/master/lsm6dsl_STdC/example/read_data_simple.c" which is official url from ST.I build code and got error due to missing of "LSM6DSL_FROM_FS_2g_TO_mg/LSM6DSL_FROM_LSB_TO_degC" definition.I couldn't find any from this git code.Actually "LSM6DSL_FROM_FS_2000dps_TO_mdps" definition is also missing and I could find in this forum but couldn't find rest of two.Can you let me know where I can find these?BR.Louiey

Hi everybody.I'm met several scenarios in which the use of HAL_PPP_MspInitwould be too constraining.A typical example is when I'm making a reusable library that needssome peripheral. If I initialize the low level resources for the peripheralsused by the library in HAL_PPP_MspInit functions, then the application codewon't be able to use them anymore.I've always initialized the low level resource before calling HAL_PP_Init andit has always worked. But I would like to have your confirm that I'm doing is legitimated.

Hello,If I understood correctly the a hard fault exception handler should catch all exceptions that do not have a specific handler that should execute when they are thrown. For example: if I enable button interrupts(say falling edge) and configure EXTI0 properly then I press the button(PA0) the cpu should try to find this ISR EXTI0_IRQHandler(). That works fine. But say I don't have that implemented. Shouldn't we end up in 'HardFault_Handler' then?I'm using a STM32F446 controller from an STM32 nucleo board.I wrote this code and tested if the code gets to 'EXTI0_IRQHandler' when I press the button. That works fine. I then commented out this ISR and expected the code to reach the hard fault handler isr when pressing the button. However that does not happen. The code stays stuck in the while loop. Please help me understand why that is happening and please correct me if I understood hard fault handlers in a wrong way. Thanks! This is the code:#i

systick was getting disabled with __disable_irq() . is it possible to use __disable_irq() without causing any effect to systick?