Hal transmit receive stm32 I2C DMA interrupt polling examples. Either both transfers (TX and RX) are aborted or the transmit or receive channel can be selected. HAL_I2C_Master_Seq_Receive_IT and HAL_I2C_Master_Seq_Transmit_IT. Can you please suggest some example code related to my task. two frames before the end (there is the holding The function spi_transmit_receive handles both transmission and reception of data. Hello again, I just realize about something interesting: the HAL_SPI_TransmitReceive_IT(&hspi1, (uint8_t*) dataTxSlave, (uint8_t*) dataRxSlave, 15) function is missing the last two bytes of data Then short/bad way is do a receive/transmit of a character at a time. Stopping an on-going transfer is possible only in non-blocking modes, interrupt or DMA. instead of using HAL_I2C_Slave_Transmit and HAL_I2C_Slave_Receive and their varients (IT or DMA), which the order of transmission between master and slave should be agreed upon beforehand, we could use the baremetal approach. 0x00000002). Associate II Options. jmsigler. In HAL_SPI_TxCpltCallback function, trigger HAL_SPI_Receive_DMA() In HAL_SPI_RxCpltCallback function, buffer received ADC data and make chip select pin high to terminate communication. When the master send the same data as above, sometimes the STM32 receive them in disorder : meaning that in the reception buffer we may have 0x34, 0x56, 0x78, 0x12. DMA receive is used for receiving streaming data, it fills a buffer meanwhile the MCU does the other job. You can also check the accelerometer's datasheet, may be you can read all the buffer STM32 SPI HAL Functions APIs SPI Blocking Mode Function APIs. ] (+) Transmit in master mode an amount of data in non-blocking mode using HAL_I2C_Master_Transmit_IT() (+) At transmission end of transfer, HAL_I2C_MasterTxCpltCallback() is executed and users can add their own code by customization of function pointer HAL_I2C_MasterTxCpltCallback() (+) Receive in Similarly, we can also receive data from other devices over UART with STM32. At last your buffers are wrong size. This is a functional c code to use I2C peripheral without using HAL and without the slave knowing the order of transmit or receive. I use one board as master and the other one as slave. It sets the FIFIO interrupt to 1/2 full (i. However, the first 2 bytes on MISO are systematically copied to third and fourth byte of MOSI, systematically. My objective is to coll (MISO output 0xB2 on the first byte is also normal, as confirmation the command was received properly). We would like to cancel or stop HAL_SPI_TransmitReceive_DMA even in the middle of transmission by GPIO interrupt, but we do not know how to do it. 192ms . To find out actual order of the variables Issue with STM32 USB Transmit Interrupted by Receive michaeljulius9. hal_uart_transmit_it is not working(No We are using HAL_SPI_TransmitReceive to transmit and receive SPI data. I can transmit and receive using HAL_SPI_Transmit() and HAL_SPI_Receive() functions. I am able to receive single user input like 1,2,3,4 but when I try to receive large packets of data(say 1k Bytes), the receive gets timed out everytime after receiving first couple of bytes. Only after I called HAL_UART_Receive_IT, I am getting interrupt. Using this knowledge, readers should be well-equipped to effectively implement UART communication in their embedded system projects using the I'm beginer in STM32, i have a project and need to receive data from another device like arduino, and now I try transmit data from UART 3 and I receive data with UART 1. Seems the TXE flag never get s Posted on June 10, 2017 at 18:35 Hi everybody, I am trying to implement callback function for I2C peripheral. Now I wan So, I try to communicate multiple time during this window (transmit and/or receive) using "HAL_I2C_Master_Seq_Transmit_IT" and "HAL_I2C_Master_Seq_Receive_IT" function. If I create data to receive buffer and use HAL_SPI_TransmitReceive_DMA it also does not send anything but it doesnt get stuck in loop as spi status is ready. The CLK output of the uC was broken. STM32 HAL USART receive by interrupt. " UART Transmit failing after UART Receive thread starts in STM32 HAL Library. I am using a FTDI chip for serial to usb conversion as I am unable to use the Virtual Com port of the STM. g. Now, the interface of SPI (the registers of STM32) provides different ways to send 32 bits: either by writing directly 32 bits to the SPI data register (obvisouly the easiest way) or by writing 4 bytes or 2x16 bits. This might not be your problem, but it's an obvious bug that will bite you eventually. Note, that after compilation, order of the variables might not be the same as in the source. UART loopback test using HAL for STM32L0. When I use this algorithm, I am getting always 0xFF values in my But HAL_SPI_Transmit_DMA does not send anything and gets stuck in while loop where it checks HAL_SPI_STATE_READY flag. We would like to cancel HAL_SPI_TransmitReceive midway through. c (therefore RxStringBuffer I2C DMA endless while loop. Add a comment | Your Answer UART Transmit failing after UART Receive thread starts in STM32 HAL Library. x\Projects\STM32F769I_EVAL\Examples\QSPI\QSPI_ReadWrite_DMA Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog The non interrupt RX and TX (HAL_UART_Receive and HAL_UART_Transmit) is working. Am using HAL library but the reception interrupt only fires once. Improve this answer. hal_uart_transmit_it is not working(No interrupt occurs) 0. HAL_SPI_TransmitReceive_DMA() transmit interrupt always triggered after receive interrupt If you transmit and receive the same number of bytes (frames, whatever), from the point of view of DMA, transmit is finished at the moment when the last byte (frame) is moved into the holding buffer, i. When transmit is done, you get this info by enabling the interrupt, start receive with timeout interrupt; On receive interrupt, parse the received message, set the logic to start transmit again. charley charley. Many of the HAL functions use the system tick to measure timeouts, and depending on your interrupt priorities, the tick may be blocked while your ISR runs. I’m currently struggeling with those because my device wants commands for reading a register that are 4 5. 5 Why does UART transmit interrupt fail to work in this case? 2 UART Transmit failing after UART Receive thread starts in STM32 HAL Library STM32 HAL_UART_Transmit_IT never returns. If you want a better implementation, you should use the receive callback to feed a circular buffer and the main loop to keep checking for new data in it and program a new transmit when data is available. How to cancel HAL_SPI_TransmitReceive_DMA We are developing SPI communication devices using HAL_SPI_TransmitReceive_DMA. 95 4 4 silver badges 17 17 bronze badges. 16 bits) as long as the number of bytes to send/receive is > 1. 1 STM32f091rc UART Receive function returning only the last byte of the packet instead of the full data packet. Inside the TransmitReceive routine I see this: HAL_SPI_TransmitReceive ( SPI_HandleTy Using HAL_UART_Receive_IT (not recommended) A nearby approach without touching HAL code itself is, to call HAL_UART_Receive_IT(&huart3, &rxbuf, 1) once after initalization and at the end of the RxCpltCallback, to retrigger the reception, but this leads to some undesired lock (possibly a HAL-Bug), when transmitting data using HAL_StatusTypeDef As Thanushan Balakrishnan puts in his comment 'SPI transmit and receive bit streams. Is it possible to cancel in the Forums » System Workbench for STM32 » HAL UART HAL_UART_Receive Timeout [ prev topic] Thread actions Print this page Print all pages HAL UART HAL_UART_Receive Timeout HAL_UART_Transmit(&huart7, (uint8_t*)aTxBuffer7, 50, 0xFFFF); } When I insert something like Posted on June 03, 2016 at 01:54 I'm having some peculiar behavior using the polling mode spin routines (F3), so I took a look at the HAL code. We’ll implement three STM32 UART Receive Examples Using Polling, Interrupt, and DMA to practice what we’ll learn in this tutorial. e. DMA is an advanced topic and currently not covered in this series. Send read command to External ADC with HAL_SPI_Transmit_DMA() function. UART is a communication protocol that enables the user to send data asynchronously through transmit (Tx) and receive (Rx) lines. but I can't get any data. Additionally, you have wrong cast in HAL_SPI_TransmitReceive call. The data direction is set to Receive and Transmit. (Schematic attached) I am using it to receive data from an ADC chip over SPI. SPI is a serial protocol, it means it sends data bit per bit. You're type casting 0x02 to a uint8_t * type (a pointer to a uint8_t). Click here for details about this function. Inside the TransmitReceive routine I see this: HAL_SPI_TransmitReceive ( SPI_HandleTy STM32 i2c slave HAL code example. STM32 SPI communication with HAL. This will avoid the time between transmit and receive. I have got the HAL_UART_Transmit function working but can not get the similar receive function to work. I am able to transmit the data to PC, but I am not able to receive any. HAL_SPI_Transmit() is referenced by 7 libraries and example projects: References from When using the HAL_SPI_Transmit() or HAL_SPI_Receive() functions on the STM32, the MOSI and MISO lines are both active. 2 How receive data with HAL_UART? 3 Issue in transmitting data over UART in STM32F103C8 ('Blue Pill') 0 hal_uart_transmit_it is not working(No interrupt occurs) UART Transmit failing after UART Receive thread starts in STM32 HAL Library. Issue in transmitting data over UART in STM32F103C8 ('Blue Pill') 0. 1 UART Interrupts in FreeRTOS with STM32 HAL driver How to cancel HAL_SPI_TransmitReceive in STM32 MCUs Products 2024-12-23; How to cancel HAL_SPI_TransmitReceive_DMA in STM32 MCUs Products 2024-12-08; SPI communication - interval between bytes in STM32 MCUs Products 2024-12-04; SPI issue in STM32 MCUs Products 2024-11-27; STM32G431 SPI Strange Data in STM32 MCUs Products 2024-11-26 HAL_UART_Transmit() (the blocking version) won't return until all the characters have been transmitted. STM32F1xx Hal Driver - Uart Receive IT - HAL_UART_ERROR_FE. The polarity and the phase seem OK, but double check. If you want to wait until they've all been sent, and have nothing else to do in the meantime, you might as well use this. I use this function in two places in the program: In function HAL_UART_RxCpltCallback, where I write back to UART the HAL_CAN_Transmit_IT and HAL_CAN_Receive_IT work with interrupts. Home; Embedded Systems. Try this instead: I'm trying to send a variable length string via UART, using HAL function. Lastly, we explored the essentials of the HAL UART data transmit and receive functions. I have discovered that the call to HAL_SPI_Receive_IT causes whatever data is in the provided buffer to be clocked out on MOSI. ' If you are trying to get data from accelerometer, probably you use bit shift operations. HAL_UART_Transmit_IT() will return immediately (before all the characters have been sent), and will send the characters "in the background". Once exactly this amount of data is received, a callback function HAL_UART_RxCpltCallback gets called (from IRQ) where I don't know about the L08 HAL lib, but on the L4, HAL_SPI_TransmitReceive() uses 16-bit transfers even if you set it for 8-bit mode. (We are the master) What are some of the factors that cause a timeout in HAL_SPI_TransmitReceive? First of all you need to understand how the HAL_UART_Transmit_IT is meant to be used. I am using STM32F105xx family, working with HAL_SPI API. HAL_StatusTypeDef UART_Xbee1::send( uint8_t* pdata, size_t sz ) { return HAL_UART_Transmit_IT(&uart, pdata, sz); } ISR. STM32 HAL SPI 16 bit Transmit. *** Interrupt mode IO operation *** ===== [. 0 STM32 HAL_UART_Transmit_IT never returns. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed; Permalink; Print; Email to a Friend USBD_LL_PrepareReceive() and USBD_LL_Transmit() need to be changed to pass on the return values of HAL_PCD_EP_Receive() and HAL_PCD_EP_Transmit Hello, I am using STM32F303RBT on a custom board and am trying to communicate through SPI with LTC6811-1 with code generated through CUBEMX. . When troubleshooting it appears the problem comes from the STM32 because when we replace it, the problem disappeared. How to stop an on-going transfer. USART receiving nonsense Hi all, I am working on the STEVAL-PROTEUS1 Board, which features the STM32WB5MMG module and the IIS3DWB high bandwidth accelerometer sensor interfaced via SPI_1. Looking at the function header the function expects 8bits. Try to use HAL_SPI_Receive and HAL_SPI_Transmit rather than HAL_SPI_Receive_DMA and HAL_SPI_Transmit_DMA. uint8_t data[] = "Hello world\n"; int main() { . For some reason it's not working at all now. It sends garbage bytes In this tutorial, we’ll discuss the STM32 UART Interrupt DMA Polling methods using the HAL APIs. Is this We are using HAL_SPI_TransmitReceive to transmit and receive SPI data. Posted on June 03, 2016 at 01:54 I'm having some peculiar behavior using the polling mode spin routines (F3), so I took a look at the HAL code. It operates by writing data to the SPI Data Register (DR) and reading received data from the same register. mfrc522 spi connection via hal Posted on August 28, 2017 at 18:34. I am new to this controller. Skip to content. You give it your buffer to which it'll read received data and number of bytes you want to receive. I want to communicate 2 STM32 boards using SPI. while (1) { HAL_UART_Transmit(&huart2, data, 12, 1000); HAL_Delay(1000); } } Here we define an array (data) which contains the string to The data sent by the STM32 is received in the serial console. In this tutorial, we’ll discuss the STM32 UART Interrupt DMA Polling methods using the HAL APIs. Using the STM32 UART DMA mode is a significantly more efficient way of transmitting/receiving data over UART while keeping the CPU not loaded most To get you started, we will configure the SPI peripherals of the Nucleo-f446re development board using STM32CubeIDE and discuss some of the important HAL API functions for interfacing with various SPI devices. So first I send 3 bytes using HAL, and then the same 3 bytes using the registers and same SPI. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company UART Transmit failing after UART Receive thread starts in STM32 HAL Library. STM32 cubeMX: triggering SPI DMA interrupt using interrupt. Am not sure which status flag that is set so that i could re-enable it or disable it to make it run another round. I2C Scanner, TX, RX. So, on the STM32 it will effectively be used as an 32-bit address (i. 4 Cannot transmit every characters through UART. 3. And using registers - 1. STM32 Timer Counter problem during sending data via UART. The HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init() and HAL_MultiProcessor_Init() APIs follow respectively the UART asynchronous, UART Half duplex, LIN and Multi-Processor configuration procedures (details for the procedures are available in reference manual (RM0329)). Recieving extra byte in UART comms. It then starts receiving data. Regular Contributor; Posts: 59; Country: STM32 SPI Transmit/Receive Using HAL « on: October 31, 2016, 01:41:44 am You can use HAL_SPI_TransmitReceive(&hspi2, ReadAddr, pBuffer, 1 + 4, HAL_MAX_DELAY); instead of a HAL_SPI_Transmit and a HAL_SPI_Receive. 2. xx. UART Transmit failing after UART Receive thread starts in STM32 HAL Library. How come? Isn't doing things with registers The Transmit. HAL_SPI_Transmit_DMA returns HAL_OK. "When I set the Master to TX__ONLY and the Slave to RX_ONLY the results are acceptable but not exact; the first four characters received by the slave are zero ('\0') otherwise the message is complete. HAL_CAN_GetRxMessage overrites other variables. 0 0 STM32 HAL_UART_Transmit_IT never returns. How receive data with HAL_UART? 2. It has been damaged by the ADC during a reboot of the uC. We'll be using blocking mode in this lesson, and interrupt mode in the upcoming ones. So no more Author Topic: STM32 SPI Transmit/Receive Using HAL (Read 52053 times) 0 Members and 2 Guests are viewing this topic. My problem is that I dont understand how I should use this functions. Currently, a timeout occurs when calling HAL_SPI_TransmitReceive in our program. The image below shows the data I have a problem with the HAL_UART_Transmit_IT function from the HAL library. Why does stm32f4 uart skip some characters when receiving using an interrupt. What you want to do is to read a register, so don't use HAL_I2C_Master_Receive or HAL_I2C_Master_Transmit, but HAL_I2C_Mem_Read or HAL_I2C_Mem_Write, like this: #define REG_CHIP_ID 0x00 HAL_I2C_Mem_Read(&I2cHandle, I2C_ADDRESS, REG_CHIP_ID, I2C_MEMADD_SIZE_8BIT, &aRxBuffer, 1, 10000); How to learn how many bytes were STM32 SPI Transmit & Receive Modes In this section, I’ll list the possible ways that you can handle SPI transactions in your firmware applications. For example, if you'd rather receive than transmit, use HAL_CAN_Receive_IT and HAL_CAN_Transmit for the transmit part. HAL_SPI_TransmitReceive_DMA will wait for the first transmit/receive operation as the second one will be blocked by HAL lock and unlock process and HAL state busy or ready. but because it uses the ST HAL, changing to different F4 parts isn't too hard. HAL_SPI_TransmitReceive transmits and receive data So when you were using HAL_UART_Transmit(), each call would lock that uart, send the data, then unlock the uart. DeepBlue Menu. Hi, I am working on stm32f051c8t6tr microcontroller, from this I want to read some sensor data with UART1 and same data I want to transmit to another UART. You can also try changing compilation settings to optimize the speed. USART receiving nonsense (STM32F0) 0. STM32 HAL_UART_Transmit_IT never returns. I would suggest you find the one that is more important for you and use the interrupt on that. : The way HAL_UART_Receive_IT works is that you configure it to receive specified amount of data into given buffer. Therefore, we're simply using HAL_UART_Transmit(). This issue is also discussed to some extent in this thread, but that thread is more focused on fixing the system behavior than discussing whether it's actually a bug in HAL. I I am using a STM32L Discovery board (monted device STM32L476xx), for a transmit and receive UART operation using HAL libraries. e. in STM32 MCUs Products 2024 Posted on July 11, 2018 at 20:13 Hi, I used to have the SPI1 working connected to MAX31865 breakout board. SourceVu STM32 Libraries and Samples HAL HAL_SPI_Transmit() HAL_SPI_Transmit() function Transmit and Receive an amount of data in non-blocking mode with Interrupt. 2 multiple string transmit over USART using CubeMx. Using DMA for UART transmit & receive with a STM32F4 Discovery - electricui/stm32-dma-uart-eui. This is the code without dma implementation: void ADXL345_GetXyzRAW(uint8_t *buffer){ uint8_t firstRegAddress = ADXL345_DATAX0; HAL_I2C_Master_Transmit(ADXL345_I2C, (uint8_t)(ADXL345_ADD I designed a breakout board for the STM32F401CEU6. You In this tutorial, we will understand the connection and configuration of different parameters of UART available in the cubeMX. I am able to send and receive the data fine when the data is not required to be sent in one burst (LTC6811 can handle pauses between bytes except when it is trying to write I2C data over SPI and then Using DMA for UART transmit & receive with a STM32F4 Discovery - electricui/stm32-dma-uart-eui. According to the IIS3DWB sensor datasheet, it supports up to 10MHz (CLK) and an ODR of 26667Hz (37 microseconds). It involves a shared baud rate HAL_SPI_Transmit(&hspi1,txData,4,TIMEOUTVALUE); HAL_SPI_Receive(&hspi1,rxData,7,TIMEOUTVALUE); because as far as I can think of, the In this tutorial, we’ll discuss the STM32 UART DMA Mode (Receive/Transmit). Data Transmit function from master to slave: HAL_SPI_Transmit(SPI_HandleTypeDef *hspi, uint8_t *pData, uint16_t Size, uint32_t Timeout); Parameters description: hspi: pointer to a SPI_HandleTypeDef structure that contains the configuration information for SPI module. About STMicroelectronics. The MOSI line is used to send data from the STM32 to the slave device, while the MISO line is used to receive data from the slave device. Question about HAL_SPI_TransmitReceive timeout. 0 Try to debug and localize where the code hangs/stop and the kind of message gives. it can send as many bits as you want. Although I have not looked into your described issue in detail yet, I've spotted a pointer mistake in the last code block. I'm sending 8 bit data using an array of 8-bit quantities. The I2C frames are always composed of 2 step: read: Transmit register address (HAL_I2C_Master_Seq_Transmit_IT) + Receive data (HAL_I2C_Master_Seq_Receive_IT) Calling complex functions in an ISR is a bad idea. Who we are; Investor HAL_SPI_Transmit_DMA(&hspi2, u8_SPI2_TxBuff, sizeofBuff); HAL_SPI_Receive_DMA(&hspi2, u8_SPI2_RxBuff, sizeofBuff); // HAL BUSY The HAL is returning HAL_BUSY because your DMA transmit has not stopped. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company HAL_UART_Transmit(&huart2,(uint8_t *)'ACK\n',5); Share. 0 STM32F1xx Hal Driver - Uart Receive IT - HAL_UART_ERROR_FE. HAL UART Data Receive Function. With the way a CAN BUS works, you can get a message at any given time and therefore your Good morning everyone, after collecting some data and storing it in various buffers, I am trying to write them to the serial port for further processing. I've tried debugging it but i still cant figure out where to start from. You might think that data_received is getting overriten, but it might not. Make a logic when you want to transmit. Since I couldn't know the receive data size, I am planning to receive characters one by one. We can get some help from STM FAQ. For code example LABs and testing, just click on the next tutorial button and keep going through this series of tutorials. STM32G431 SPI Strange Data in STM32 MCUs Products 2024-11-26; Top. void HAL_SPI_RxCpltCallback(SPI_HandleTypeDef *hspi) { volatile uint8_t y = 5; } Before my question: Using the "normal" SPI_Transmit&Receive functions, I transmit & receive correctly. When restarting, the EXT/NINT pin is briefly low (even with pullup). If you ever got a receive interrupt while HAL_UART_Transmit() was active, the call to HAL_UART_Receive_IT() in the interrupt callback would fail (and return) because the uart is locked by HAL_UART_Transmit(). An interesting observation from STM32Cube created HAL files for stm32f103: if SPI is configured as Master, HAL_SPI_Receive itself uses HAL_SPI_TransmitReceive. 9 STM32 HAL USART receive by interrupt. Related questions. The function is "non blocking" because when you call it it will do some Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company HAL_SPI_Transmit_DMA works OK, but HAL_SPI_Receive_DMA returns HAL_BUSY, so even the first reading process seams OK, it actually doesn't and I cannot read the bytes that I wrote just before the reading operation. I have tried one code also but its not working, I will I understand that HAL_UART_Transmit/ Receive_IT function are meant to be non-blocking and by little bit digging I found out that in fact as you mention, these two functions delegate the execution to other function that may execute after exiting the uart_func. STM32 problem with UART RX throught DMA in STM32 MCUs Embedded software 2024-10-11; Take a look at this guide to learn about the I/O modes in STM32 HAL. When you're using the non-blocking, interrupt based HAL functions, I would define all the HAL_I2C_*() callback functions, in order to be able to react to the interrupts (you're polling the state right now to see when the operation is finished). Using HAL, the "interbyte" pause is 0,848ms. There is no way to send a string that is changing its length runtime, I have tried with various declarations, inside and ou The routine is called each time I receive a new character, but somehow HAL_UART_Receive_IT(&huart1,rx_data,buff_size_rx) does not upgrade in realtime, then I don't see the received character when I check rx_data[pointer], but a few time later it is in the rx_data buffer. Regards In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question. 1. (1 STM32 SPI Master to UART Transmit failing after UART Receive thread starts in STM32 HAL Library. We will also transmit the data over UART and receive it on a serial console in the computer. I traced into the code, seems HAL_SPI_Transmit() failed on __HAL_SPI_GET_FLAG(hspi, SPI_FLAG_TXE) until timeout. The ADC chip has a data ready output which should be used as an Your code does not seem to be written to use DMA, so don't use it. It is just looping around and around your buffer. I suggest to start with the QSPI example available under STM32CubeF7 MCU package, to confirm if the problem here seems related to your hardware or software environment: STM32Cube_FW_F7_Vx. 0. Even though theRxXferSize andRxXferCount gets set to 0x404, the control goes intoUART_WaitOnFlagUntilTimeout(huart, UART_FLAG_RXNE, RESET, tickstart Hi, I have some trouble to handle ADS7953 with HAL_SPI_TransmitReceive_DMA api, if using HAL_SPI_TransmitReceive api, it takes long time and impact other operations, so I hope to reduce the communication time with HAL_SPI_TransmitReceive_DMA in the communication of SPI, please help to let me know UART Transmit failing after UART Receive thread starts in STM32 HAL Library. Since you arrays are of uint8_t type you do not need cast at all. STM32 UART transmission problem (blocking and interrupt mode) 1. Follow answered Jan 31, 2020 at 9:07. But I am trying to make it work with interrupts. I am not sure that the way you call EEPROM_SendInstruction is correct. I am experiencing issues as I can see that something is being written to the I am trying to transmit and receive data via UART/USART on stm32L476 discovery board to terminal on PC. wfou hecvdubs judz zpibdg pqiwsbov tpj ofisr pevkhe fce seydcg