Others: hardware and software

I am trying to step into ST Microcontrollers. I have been able to blink LED of Blue Pill. My next attempt to interface 16x2 LCD with Blue Pill. An example code is being studied. In MikroC PIC Compiler control first goes to main() function  from where other functions are called. In STM Cube IDE, I cannot understand where control goes first. Also what is the significance  of  "void delay (unit16_t us)"  and "HAL_Delay()". The code is attached. Please help this #include "LCD.h" #include "stm32f1xx_hal.h" /*********** Define the LCD PINS below ****************/ #define RS_Pin GPIO_PIN_1 #define RS_GPIO_Port GPIOA #define RW_Pin GPIO_PIN_2 #define RW_GPIO_Port GPIOA #define EN_Pin GPIO_PIN_3 #define EN_GPIO_Port GPIOA #define D4_Pin GPIO_PIN_4 #define D4_GPIO_Port GPIOA #define D5_Pin GPIO_PIN_5 #define D5_GPIO_Port GPIOA #define D6_Pin GPIO_PIN_6 #define D6_GPIO_Port GPIOA #define D7_Pin GPIO_PIN_7 #define D7_GPIO_Port GPIOA void delay (uint16_t us) { int oo =

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Hi,Could you please confirm me the type of CRC16 used for data sent to a STSAFE-A110 chip? (CRC-A?, CRC-ARC?, CRC-CCITT?, ...)Thanks a lot.

Hardware / DT:I’m using ST M24M02DR (2 Mbit I²C EEPROM, page size 256 bytes, write cycle ~10 ms per byte/page) at 400 kHz. Device tree:eeprom@50 { compatible = "st,m24m02-dr", "atmel,24c2048"; reg = <0x50>; pagesize = <256>; num-addresses = <4>; }Per ST’s datasheet, page size is 256 bytes and both byte write and page write complete within ~10 ms. But always kernel is detecting as 128 bytes/write"[ 2.233319] at24 1-0050: 262144 byte 24c2048 EEPROM, writable, 128 bytes/write"Observation in Linux driver (at24):In drivers/misc/eeprom/at24.c, the driver uses an I/O transfer limit (at24_io_limit) to avoid holding the I²C bus for too long. That limit is 128 bytes, enforced as a power-of-two so writes align with pages:/** ... With a 100 kHz I2C clock, one 256 byte read takes about 1/43 second ...* This value is forced to be a power of two so that writes align on pages.*/As a result, even if pagesize = <256>, the driver will chunk writes at min(pagesize, at24_io_limi

Good afternoon everyone,I am currently working on a 1 kW Dual Active Bridge (DAB) converter with an input voltage range of 360 V–400 V and an output voltage range of 32 V–60 V. My objective is to design the converter with Zero-Voltage Switching (ZVS) enabled over the widest possible operating range, particularly under light-load conditions.I am facing challenges related to the magnetizing inductance (Lm) calculation, which plays a critical role in achieving ZVS at light load. I would greatly appreciate it if someone could share the methodology or equations to determine the optimum value of Lm to maximize the ZVS operating window under light-load conditions.Additionally, I am encountering an issue in my LTspice simulations. Theoretically, reducing Lm should increase the ZVS range; however, in my simulation results, the ZVS window decreases as Lm is reduced. I would appreciate any guidance on identifying possible causes or mistakes in the simulation setup.If any experienced professional

Hello community,Can someone please assist to fix this issue in LTspice.Tried to add the spice model for SMA6T28CAY diode - Could not able to run the simulationAny suggestions? Best Regards,Vedanth

i am using bluepill board. which PA9,PA10 is connected to header. when i connect FTDI as RX Tx mode  and also i cheked REST status(reset is high if switch not pressed) but cube programmer say exact like you. my target chip is STM32F103C8T6. using clone stlink i found chip id is 0x414 and flash memory is 256Kb which is not according to datasheet of that MCU. 

DearLike my subject says, I am looking for a replacement part for M48Z128-85PM1 as this is now obsolete. Thank you for helping me. kind regardsSanders

Hello,Is it possible to purchase an the IAR Workbench For ARM for an individual or does the the IAR Systems only cooperate with legal entities?

 Hello everyone,I’m working on diagnosing and rewiring the control system for an Ingrem Veyron J20 gaming chair. The chair uses a servo module with an RJ45 connection to the handheld remote, and I’ve been tracing signals back to the main board (marked ST‑H801S‑V1.1 and ST‑H8‑CORE‑V2.1).Here’s what I’ve established so far:RJ45 pinout from the remote:Pin 1 → Green (likely RX)Pin 2 → Black (Ground)Pin 3 → Yellow (TX??Pin 4 → White (logic/handshake line, not VCC)The board itself has a separate AC power feed.With RJ45 disconnected, the board powers up fine (red LED lights). When RJ45 is wired incorrectly, the board fails to boot.I believe the connections come from UART1 and COM20, but I don’t know how they should map to the RJ45 connector:question_mark:What I NeedIf anyone here owns an Ingrem Veyron J20 chair, could you please:Photograph the main board (ST‑H801S / ST‑H8‑CORE) with the connectors attached.Show the RJ45 wiring harness and how the colored wires (green, black, yellow, whit

I have an Queary ,How to design Firmware Of Bridge less Pfc Circuit ?For Below Specifiction input Voltage is varrible(Comes In AC) input current is constant (2.8 amps and 6.6amps )output voltage is constant 24vDCoutput Current Is 1.5AmpsNote : Input Device Name Is Constant Current Regulator .So kindly Suggest How To Design Firmware And Calculation Of Frequency As Per Circuit (Like Inductor RIpple And All)Circuit Digram Is Attached . Regards,Nilmani

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Dear technical teamI'm designing a triamped system with the STA540 , in fact it uses two STA540's per unit.  I've divided the system in one STA amplifying stereo treble and mid, and other STA for bass amplifier, but given that bass channel is not stereo (has the sum of L and R bass, I'd like to know if I may parallell channels 1 || 3 and 2 || 4 for a single bridge amplifier, instead of using only one bridge (1-2 or 3-4)Can this chip operate with parallell channels? If it can, is it okay to use the channels that I've listed, or there is a better channel pairing?BestIgnacio

We repair Fire Alarm Panels, and I have a known good chip PSD813F1A that I can read and save the data but when I program the blank device it will program but then gives me a verify error and it doesn't function in the panel. I'm using the Logical devices XPRO programmer with the proper adapter DX2052 (PLCC). It is listed in the program's library so that's not the issue. Not sure if there's a source to properly program this device or do I need special programming software and programmer to accomplish this. Any help will be amazing!! Thanks for allowing me post here.

Hello everyone, My name is Aleksandar, and this is my first time posting here.I’m trying to simulate the operation of the TL494 controller in a full-bridge (H-bridge) configuration using an STM32F103 (Blue Pill) and STM32CubeIDE with the HAL library.Project goal: The aim is to simulate the TL494 controller and apply it to control MOSFETs in a full-bridge (H-bridge) configuration. The goal is to generate two PWM signals that are phase-shifted by 180°.I would like to have full control over the switching frequency (1kHz - 200kHz) and duty cycle (5% - 45%) , and I also want to implement dead time (5%) that is proportional (percentage-based) to the frequency. I have already tried to simulate this behavior in CubeIDE, but I couldn’t get the correct phase-shifted signals.I would really appreciate some guidance or examples on how to properly configure the timers for this. My question is:Is it better to use CH1 and CH1N of a single timer (with complementary outputs), or two independent timers?

I have a project of making a point -2-point communication using lorawan protocol with the chip called AI-thinker Ra-09h that have an STM32WLE5 MCU . The problem is i dont have any knowledge in this field and i dont know how to deal with this module 

This board has STM32F103C8 MCU. I applied this patch for USB CDC interface, to successfully read/write data between STM32 and laptop via USB cable. How to make this STM32 enter light sleep mode, while allowing STM32 to maintain virtual com port connection with laptop, and only wake up when I send something to STM32 from my laptop using a terminal app? I tried debugging by putting wakeup_reason in various USB_CDC functions in USB_Device/App/usb_device.c USB_Device/App/usb_cdc_if.c USB_Device/Targe/usbd_conf.c But I didn't see wakeup_reason change after wake up. I tried two ways: // command c-strings char *cmd1 = "cmd_sleep"; while (1) { // check if there is any data received on USB CDC bytesAvailable = CDC_GetRxBufferBytesAvailable_FS(); if (bytesAvailable > 0 && (bytesAvailable <= sizeof(TxBuffer)) ) { HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET); // led on HAL_Delay(10); // small delay to ensure interrupt USB library functions will fil

Hi everyone,I’m facing a strange problem while using the Zoom Android SDK. When I share my screen and play a YouTube video inside my Android app, the audio starts off fine but then becomes glitchy for other participants. It slowly gets out of sync or sounds broken, even though the video stays perfectly smooth on my side.To double-check, I tested the same thing with a few of my own videos on https://yoomp3.com/pt-PT, and the exact same issue happens. Video is clear, but the shared audio gets messy after a few seconds.My setup:• Android SDK version: 4.6.21666.0429• Tested on two Android phones• Tried both in-app playback and browser playbackHas anyone seen this kind of audio glitch before during screen sharing? I’m looking for any hint or setting that keeps the shared audio stable.Thanks in advance!

Hello,I would like to gather some information related to enabling LDRC mode on SPSGRF-915 Low Power RF Modules.Below are the documents I am referring to:1.) SPIRIT1 Data Sheet : Section 7.3 Low Duty Cycle Reload Mode.2.) AN4193 Application Notes : Entire document as it focuses on LDCR mode and RX TIMEOUT along with Programming Tips to enable the same.I am currently working with two SPSGRF-915 modules. One is a RF transmitter only and the other is a RF receiver only. The receiver module never talk back to the transmitter. Also, the RF Receiver module is a battery operated and I want to implement the LDCR mode on the receiver.The current software version on my RF communication is a continuous RX Listening on the receiver end. Following the steps mentioned in the SPIRIT1 Data Sheet, I have implemented the below:1.) Upon powering up the receiver module, I keep the RX_TIMEOUT to an INFIINTE Value at the beginning. 2.)  After receiving the very first frame and processing it, as per

Hello, as I mentioned in the title, I'm designing a battery-powered UHF RFID reader. This is a challenging project for me; I'm pushing the limits.MCU: stm32wb52cgUHF RFID: ST25RU3993Battery: li-ion (18650)I'm using the ZigBee feature of the MCU. My question is, I need a design that's compatible with both batteries and works at 2.5V levels. Therefore, what kind of power circuit should I create? If I install a 4.2V battery, I need to use a step-down converter. If I use li-ion (18650), I need to use a booster. What do you think I should do? 2-Is a switching regulator used in a UHF RFID circuit? 3- I need to make a booster with the li socl2 battery. When the battery drops to 2v, should I make a step up for RFID reading performance?

i have an old st92F150 that is defect. now i have an extra which is good so i wanted to upload the dump from the good one into an empty one. for this i need STVP9 software. is there a way you guys can help me get this? other link on this forum is expired or something.

Hi, i'm looking for at least a pinout for the STDP6036 or STDP6038 Ic (128-pin PQFP) Triple input LCD controller for WSXGA+ and WUXGA applications