Solved

Hello to all,am trying trying to interface micocontroller using SPI Protocal.here , am having 4 slaves and a Master, SLAVES are M0 based Micro controllers where as Master is M3 based micro controller.am sending and receving from slaves using DMA .Both side Master and Slave side am using DMA for transmit and receive.sending 133 bytes to every slaves interval of 3 milliseconds.MASTER Clock tested at 1.875mhz and 3.75mhz.Problem :problem is in 4th SLAVE it receive shifted datasuppose i sended :tx from MASTER: 133 bytesaa cc 80 5d 5e 5f 60  61 62 63 64 65 66 67 68 69 6a  6b 6c 6d 6e 6f 70 71 72 73 74  75 76 77 78 79 7a 7b 7c 7d 7e  7f 84 85 86 87 88 89 8a 8b 8c  8d 8e 8f 90 91 92 93 94 95 9

Hi,I've read that for some STM families (F0, F3, L0, L4, etc.) the I2C clock timing must be calculated with an excel file or with the STMCubeMX software.The calculus is "closed source"? Can I reproduce it in my own code?I'm writing an interface for an I2C device and I want to support multiple boards. But how can I let the user choose the I2C clock of its master device using, for example, an STM32L4 board?The user has to download the STMCubeMX software, generate the I2C clock and then report it to my code? It is the only way?Thanks in advance,Antonio

I am trying to protect code(in flash) and data(sram) using fire wall feature But board is resetting when exucute the function. Following is the code to initiate and enable fire wall. void firewall_init(void){ FIREWALL_InitTypeDef firewall1; firewall1.CodeSegmentLength =0x00000088; firewall1.CodeSegmentStartAddress= 0x08003a6c; // Address of "function to protect" firewall1.VDataSegmentLength=256; firewall1.VDataSegmentStartAddress=0x200000b4; //address of data to be protected firewall1.VolatileDataExecution=FIREWALL_VOLATILEDATA_EXECUTABLE; firewall1.VolatileDataShared=FIREWALL_VOLATILEDATA_NOT_SHARED; firewall1.NonVDataSegmentStartAddress = 0; firewall1.NonVDataSegmentLength = 0; HAL_FIREWALL_Config(&firewall1); HAL_FIREWALL_EnableFirewall();}void function(void){firewall_init();function_to_protect();HAL_FIREWALL_EnablePreArmFlag();}When it is tried to execute function_to_protect() it is resetting.Please help me to resolve the issue.ThanksSrinivas MNMS

After reading the data sheets, the Getting Started document and others, I need some clarification on connectivity of the VddUSB pin. On page 12 of AN4555, it states:"The USB transceivers are supplied from a separate VDDUSB power supply pin. VDDUSB range is from 3.0 V to 3.6 V and its voltage level is completely independent from VDD or VDDA." I guess this means it's as dependent as the design makes it, or is it (also) isolated internally? On my design, I have an STMPS2141 switch that is supplied by the same 3.3V that is feeding the MCU - the USB will be enabled only when a USB stick is plugged in. So does it matter if the VddUSB pin on the MCU is fed straight away from the supply, or should it too be supplied by the output of the STMPS2141? Is anyone aware of a reference design with a USB on the STM32L4? Thanks

Hello there,I have a device called RuuviTag that includes your LIS2DH12 accelerometer and that can be programmed by means of an IDE called Espruino in JavaScript.For a project, I am trying to get the tilt angle of the device measured in degrees with a value between 0 and 360. At the moment, however, I'm not succeeding and looking on the internet I found this documentation:https://www.st.com/content/ccc/resource/technical/document/application_note/d2/d6/22/4f/b9/8f/45/59/DM00119046.pdf/files/DM00119046.pdf/jcr:content/translations/en.DM00119046.pdfDo you have any code to which I can get information for this problem? I tried to use equation 2 but it doesn't give me back the angle. I also tried equation 6 but it doesn't work. The values I can take from the accelerometer are values in mg.Here is the photo:Do you know how to help me?Thanks.

If my Vdd is the same of Vdd_IO, can I directly connect pins 9 and 10, and use only two capacitor (100nF ceramic + 10μF aluminum) in my PCB? The datasheet say that: "All the voltage and ground supplies must be present at the same time to have proper behavior of the IC", but someone told me that I have to ensure that Vdd_IO is "faster" that Vdd, I mean, first apply Vdd_IO, then apply Vdd.Could you please confirm my thought?Thank you for your attention.

Does anyone can provide version 1.11.0 of stm32cube fw l4?I'm using STM32CubeMX V4.25 to maintain old project,but I can't download the version by CubeMX.

I am trying to set up a timer go to a one shot timer that goes to the DAC update command (to output data that was written via DMA). I am little confused on how to set everything up. I want to set up timer 1 to go to timer 2 and timer 2 will be a one shot.Seems simple enough, but I am a little confused on how to set this up in Cubemx. How do I make sure that Timer 1's TRGO goes to the correct ITRx in Timer 2? Also is it assumed that since I disabled Timer 1 in slave mode that Timer 1 will automatically be the master? What if I had timer 3 be a master timer for something else? There seems to be no way to direct which timer will go to which ITRx. Is this just something you have to do in code manually?

I only find STM32H743 datasheet noticed support CAN FD.

Hello I am brand new to STM32F0xx chip set. I have on board HTS221 and need to read temperature and humidity over 3 wire SPI interface. Can anybody point me in the right direction. Maybe there is an example code on how to setup SPI1 for half duplex so I can read and write to HTS221 registers correctly. I tried implementing the SPI on my own but have some strange timing issues. please see attached image and the source code

I Previously used V4.0.0 (At least I think so) but sometime ago upgraded to V4.2.0. Now every second time I read a .hex from disk it crashes (having programmed the chip between file openings). The .hex is for a stm32H7 (doesn´t know if it makes a difference). I´m using Windows 7 64 bits. How can I report this back to ST?

Posted on September 14, 2017 at 06:22Greetings People,Is it necessary to connect VDDA in STM32F030R8 ? I am not using ADC in my application. Any suggestions would be of great help.#analog-supply #external-power

EPENA bit for IN endpoint 0 (OTG_FS_DIEPCTL0 register) is marked as read-only both in the reference manual and in the SVD files for F429.I believe that is a mistake, as the EPENA bit is used to start transmission on the endpoint and both libopencm3 and STM32 LL drivers ignore the fact that the bit is marked as read-only.HAL_StatusTypeDef USB_EP0StartXfer(USB_OTG_GlobalTypeDef *USBx , USB_OTG_EPTypeDef *ep, uint8_t dma) { // other code   USBx_INEP(ep->num)->DIEPCTL |= (USB_OTG_DIEPCTL_CNAK | USB_OTG_DIEPCTL_EPENA); // other code }It's possible that the DIEPCTL0 EPENA bit was confused with the DOEPCTL0 EPENA bit, which is marked as write-only, even though it should probably be read-only.Would someone clarify this for me?

I am working with the STM32F4 and STM32F7 microcontroller families. I am sure that I, at some point, have seen a drawing that shows how the different clocks are routed to different peripherals. This drawing was very helpful when I had questions like "what clock is UART2 running from?", "what clock is the CAN1 running from?", etc. However, now I'm unable to find the drawing, I have looked in the reference manuals and the data sheets, but to no avail. Could someone please point me in the right direction?

Posted on January 07, 2018 at 03:06Hi, I just got the EVAL-IDB007V1M with the spbtle-1s (based on bluenrg-1 and installed the STSW-BLUENRG1-DK (v2.5.0) on my Windows PC. The BlueNRG-1 Navigator recognizes the EVAL-IDB007V1M and I can 'Flash & Run' the basic examples and the BLE demonstration and test applications. They seem to run on the EVAL-IDB007V1M - at least they to something when I press the buttons but I get strange results. First, when I 'Flash & Run' the BlueNRG-1 Hello World from the basic examples I get this output: With another terminal program it looks like this:I expected Hello World... What's wrong?Second problem (and more severe in my case): When I flash and run the BLE demonstration and test applications I would expect to be able to establish a connection to the EVAL-IDB007V1M from my Android smartphone. I tried to use the Apps STM32 BLE Profiles, BlueNRG and (sorry for that) nRF Connect. But I couldn't get any connection to the  EVAL-IDB007V1M. I tried s

becouse of this problem:https://community.st.com/s/question/0D50X0000AAIIetSQH/i2s-dma-complete-transfer-irq-on-circular-mode?t=1546553719139I need to use stm32f4 hal library version 1.11I cant generate a project with CubeMX 5 and using that library version.Is there a way to use old hal library version?

Hello I am trying to read the Quadrature optical encoder using TIM2 with STM32F103. I've done the Timer settings. But the TIM2->CNT Always zero. I measured the Timer channels with the oscilloscope. The encoder signals reach TIM_CH1 and TIM_CH2.(PA0, PA1)This is my init codevoid ENCODER_TIM_Init(void){ TIM_Encoder_InitTypeDef TIM_Encoder_Init; GPIO_InitTypeDef GPIO_InitStruct; __HAL_RCC_TIM2_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /**TIM2 GPIO Configuration PA0-WKUP ------> TIM2_CH1 PA1 ------> TIM2_CH2 */ GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1; GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);   TIM_Handle.Instance = TIM2; TIM_Handle.Init.Prescaler = 0; TIM_Handle.Init.CounterMode = TIM_COUNTERMODE_UP; TIM_Handle.Init.Period = 0; TIM_Handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; TIM_Encoder_Init.EncoderMode = TIM_ENCODERMODE_TI12; TIM_Encoder_Init.IC1Polarity =

I would like to know whether the general purpose timers Timer 1,8,2,3,4,5 in the STM32 F7 series can be configured in encoder mode?I am doing a comparison between F7 and H7 series Microcontrollers. I need to count my motor rotations through timers in encoder mode instead of interrupt the CPU for each rotation. I came across in the datasheets that for H7,there are 5 low power timers which support encoder mode and in F7 series there is 1 low power timer which supports encoder mode. Hence I would like to whether the general purpose timers in F7 series supports the encoder.

..

How to setup STUSB4500 to deliver 15V 2.5A without programming ?If programming needed, how it can done?Where should I get the evaluation board for the same?Can I power STUSB4500 using the charging port without connecting to battery(Powered from Source- IC should power on by taking power from source power- 5V)Pls help me to design this

Posted on July 03, 2018 at 17:56Hi all:    STM32Cube_FW_H7_V1.2.0 ethernet sample is using DHCP, I want use static IP address. So I change the DHCP definition to 0 in lwipopts.h.&sharpdefine LWIP_DHCP               0    After comple the code and download to board, but I can not ping to board. What is wrong?    Thanks.#stm32h7-ethernet #stm32h

Edit: I solved the problem, it was my own fault! The Operation Control Register's bit 7 was set to 0 when it should have been set to 0. Thanks!--------------------------------------------------------------Hello all,I am working with the ST25R3911B discovery board (ST25R3911B-DISCO) and am attempting to directly interface the ST25R3911B IC with an Atmel microcontroller (in this case, and Arduino Uno).Over SPI, I can read and write the registers of the ST25R3911B with no issues, I can even send direct commands. The ST25R3911B reacts/responds to my actions as I would expect it to.The issue I have ran into is that I am simply unable to read or write to the FIFO. This is confusing because, in principle, it is a very similar operation to reading/writing the register. The only difference to the microcontroller is that the Mode Bits and 'trailer' it transmits are different. Refer to page 33 of the ST25R3911B to take a look at that detail.After trying to write to the FIFO, the 'FIFO Status Regi

Hello,On this picture, which is the pin Nr 1?Top right or bottom left ?ThanksJulien

Hello,We need to use RS-485 in full duplex, and with the flow control (DE).Is it that when we configure DE with RS485 is shall be used as half duplex ?can I configure rs232 pins with RTS (instead of DE) before converting voltage to rs-485 levels ?Will this create a full duplex connection ? (CTS shall always be active in order to provide full duplex connection)Thank you,ran