Stm32 printf not working. Write my own implementation of fputc function, add stdio.
Stm32 printf not working. To do that, we need to re-write the underlying functions.
Stm32 printf not working Jan 24, 2021 · I took the "Examples\\UART\\UART_Printf" as reference and added the EmbOS. Apr 4, 2018 · M95P32 EEPROM using QSPI interface on Nucleo-L496ZGP in STM32 MCUs Products 2025-01-06; SD-card Works in 1-bit mode but it does not work in 4- bit mode. specs -lc -lrdimon as linker flags . I'm activating -u _printf_float . In latest STM32CubeIDE with newlib support, printf function is working fine with proper heap, task stack size and io redirection settings. or I am dont know. Some changed the clock frequency some set it to the default. Please let me know what the issue can be. Provide details and share your research! But avoid …. I can program my board, debug it, I can see variables on live expression and everything is working perfectly. Make sure you put those functions within "extern C" or within a C source file so they have the right linkage. Apr 30, 2023 · In part 2 we wrote a Makefile to build the project, configured the system clock and created a basic blink application. It loops endlessly in the Default_Handler function. In the main it uses the main program heap and the stack. Jun 25, 2019 · STM32 printf() redirect. Feb 5, 2015 · the printf and scanf options are greyed out in my gui. Original. I am aware of this Jun 6, 2018 · SWO (SWV, printf via ITM) is completely broken (or ST-Link-Utility does not configure this CM7 properly) 5. But since there is nothing on the UART port of my embedded board for example, all the program knows is that it executed the function, not knowing if I actually saw anything. My clock is running on 24Mhz. What I want is a decimal value and I would have thought that declaring it as a float would solve the issue, but when I do that nothing gets printed. ) does not do any flushing itself, it's the buffering of stdout that may flush when seeing a newline (if it's line-buffered). variable = (TIM2->CNT)/48000000; trace_printf("%i",variable); Oct 23, 2012 · The problem is that the output buffer is filled with the string value of the first printf but does not output it to the console. I have an STM32F103RB board (Nucleo), and I just got USART1 working. g. It did not work either. My setup : I have re Feb 4, 2024 · I had written a function to support printf() using USART3 for NUCLEO-F767ZI board. 2. I doubt cout is going to perform better. c wouldn't work. Hardware: An STM32 development board (we use the NUCLEO-F439 as an example). Ask Question Asked 5 years, 9 months ago. It sounds like it is working if it worked with the first example and is compiling in the second. And, as attached picture, exception is occurred at execution of FPU instruction, vcvt. I'm using STM32F401RE evaluation board, and running the uart_printf example project that came with STM32cubeF4 package. specs -specs=rdimon. In the Debug Configuration Properties, when enabling SWV, the Core Clock frequency must be set at 275MHz (not 550). The Trace clock is however 275MHz as noted on the Clock Configuration diagram. This same thing is working on my project with the STM32H7B3I-DK, using usart1. Jun 28, 2019 · I'm new using stm32 microcontrollers, I have been trying to use the printf tracing in my code without success, anything is printed on the console . HAL_UART_Transmit() still works fine but printf never seems to call __ioputchar. I am trying to get the printf working on it. Block Erase Function Issue with MT25QL01GBBB NOR Flash on STM32 MCU in STM32 MCUs Products 2024-12-18; Jul 1, 2021 · I had a main. Dec 4, 2015 · Posted on December 04, 2015 at 13:46 Hi, all A newcomer in this product, I've been trying to do this for several days now. It did not work, so i decided to get the state directly from huart. 2 in STM32CubeMX (MCUs Aside from blinking an LED, printing informative messages to a serial console is perhaps the simplest, most straightforward, and most common technique employed when debugging embedded projects. extern void initialise_monitor_handles(void); initialise_monitor_handles(); for initialization at the beginning of main() arm semihosting enable option in OpenOCD cfg file in order to enable semihosting in OpenOCD . If someone knows how to solve my issue, please feel free to share your solution. I assume this means printf() is being linked somewhere else in both projects (although the top of the stack looks identical). That is the first clue that we are not dealing with a normal C library situation. For example, I am not sure whether the linker script is correct, or are the syscall functions. huart, (uint8_t*) ptr Jun 2, 2023 · The problem is about Sprintf with floating point number on STM32L452RET6P. I am Sep 24, 2016 · The code size and the set of features offered by these lightweight implementations lie in between the custom written printf function and the stock standard printf function (aka the beast). The compiler is GCC. . And use Printf via SWO viewer, here is the manual of ST-Link Utility, relevant part starts on page 31. 24. c that redefines _write() to interate over the string and call __io_p Jul 22, 2021 · ITM and printf do work on the Nucleo-H723ZG. My setup : I have re Nov 25, 2024 · Help Needed: Setting Up CLion for STM32 Development on macOS in STM32CubeMX (MCUs) 2025-01-09; Inconsistent behaviour on NUCLEO-H755ZI-Q in STM32 MCUs Boards and hardware tools 2025-01-09; OpenOCD does not bypass data cache in STM32 MCUs Embedded software 2025-01-09; STM32L051C8T6 not executing the code properly in STM32 MCUs Products 2025-01-09 Zephyr Workbench, a VSCode extension to manage Zephyr on STM32. I'm about t Jun 28, 2018 · What got this working was selecting "Trace Asynchronous" debug option on CubeMX and not "Serial Wire". specs and I have implemented the _write function as an empty function and this causes the whole printf to be optimized away by GCC's -Wno-unused-function even with -O0 on the STM32 target (seen in map). 0 Build: 21983_20240628_1741 (UTC) compiling for STM32G431 processor. but when I import a TrueStudio project where sprintf works with floats, then it works also in CubeIDE. Mar 3, 2022 · And tried to setup the sys clock for "Asynchronous Trace" and "Serial Wire", none worked and I keep getting the same output (SWV Graph does not work either): IMG-SWV_Output. Aug 15, 2019 · However, semihosting can be extremely slow. Jun 13, 2021 · I am trying to Debug with SWO and SWV in STM32CubeIDE. f64. STM32 ITM tracing + printf don't work My board is Nucleo-STM32F411RE. I had added _write() to main function to get printf SWD working working on the c file, now on cpp file _write never gets called? Oct 27, 2016 · @ChrisStratton Well the printf function is working because I can see it being executed through the memory (I even tried a scanf before it and that worked too). If you create an AC6 project, it will include the file syscalls. Since it is connected to UART2, the print code should have easily worked over USB with the computer, but things don’t work that way in the ST world. Christoph May 8, 2020 · I am trying to write a simple hello world in order to make printf work with my setup. Now I changed the main. Jun 6, 2018 · SWO (SWV, printf via ITM) is completely broken (or ST-Link-Utility does not configure this CM7 properly) 5. 2より古いバージョン. Sep 25, 2017 · I use --specs=nano. asynchronous trace vs. May 5, 2022 · Not sure if a minimal reproducible example would help here, but it sure would not hurt. Dec 16, 2024 · well I am using Nucleo Board which is F401RE. h header. I use STM32CubeIDE. in STM32 MCUs Wireless May 7, 2019 · Now i checked that the right printf is included but it only prints 0. cut out stuff that is not relevant to the problem you are seeing, but May 8, 2024 · I have 2 projects for a nucleo-H536ZI. To do that, we need to re-write the underlying functions. Sep 12, 2011 · Possible Duplicate: Why does printf not flush after the call unless a newline is in the format string? (in C) I faced this problem while doing a networking project. Then setup the debug configuration as follows: Also, I'd defined the write function inside of the main. I have recently tried this Tiny Printf and very pleased with its performance on an ARM core in terms of memory footprint and the number of execution cycles Feb 4, 2024 · SD-card Works in 1-bit mode but it does not work in 4- bit mode. I was able to narrow down the Feb 18, 2022 · printf cannot output BLE debug information. The library defines a “weak” function called _write() to output the formatted string. The example project uses HAL driver, not StdPeriphLib Apr 30, 2019 · It appears from stepping through the program that the printf function simply doesn't compile to actually do anything atall; the function doesn't go anywhere, whereas the direct calls to the HAL library go into a web of stuff. in my llinker but it doest not change anything. Best regards. Yes, I think that 4 Kbytes is enough for stack in my application. Nov 19, 2021 · I started fresh project for this, didn't modify linker file nor any project settings, with exception of ticking "Use float with with printf from newlib-nano" I suppose hard fault from sprintf is not desired outcome, but I can't find any obvious way to fix this. The printf() text does not. in STM32 MCUs Embedded software 2025-01-03; printf cannot output BLE debug information. - CubeMX / System Core / SYS, set debug mode to Trace Asynchronous Sw. May 10, 2009 · stm32f469i CAN Not Working in STM32 MCUs Products 2025-01-10; How to test ST25DV NFC FTM mode transaction with MCU integration in STM32 MCUs Products 2025-01-10; STM32CubeIDE only running code from one project in STM32 MCUs Embedded software 2025-01-10; STM32H7 Ethernet and LwIP: No data seen when running iperf 2. sending flag. Those who are having the same problem, just follow these simple steps: Add a custom _write function to syscalls. c file with SWV prinf working just fine in the SWV console. Apr 27, 2022 · Qualifier: We're not using IAR or the exact STM32 you are, but we are using many different STM32, with both UART and VCP for terminal diagnostics by printf, and UART for data communications. Memory bug? There are many things I don't understand. Box Pro in STM32 MCUs Embedded software 2025-01-16; STM32L053 GPIO Outputs not working in STM32 MCUs Products 2025-01-16; No I2C communication with Nucleo-F411RE and ADXL345 in STM32 MCUs Boards and hardware tools 2025-01-16 Feb 24, 2022 · Cannot get printf to work with SWD. So far, we have built the project without the C standard library by invoking gcc with the -nostdlib flag. Appending '\n\r' to text in printf() does not cause this odd problem and makes things work as one would expect. In the future, you can catch problems like this yourself by preparing a minimal reproducible example, including a minimal command for compiling the example. wrong debug block/ROM table register based addresses, Aug 7, 2017 · I have a STM32VL Discovery board, which uses the STM32F100RB microcontroller. 1. STM32_printf_troubleshooting_20220428PR. I am using the compiler option 'ARM compiler 'Use default compiler version 5''. 16; STM32CubeMX v1. Uart works. If it were a hardware issue, with or without printf in standalone mode, there should be no difference. Printf worded with embOS. Aug 19, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I'm a complete newbie to the STM32, but it appears there's some sort of buffer/flushing issue. May 22, 2017 · I would like to print floating variable with printf but it is not working. 16. Configuring the ITM console for printf redirections 2. Modified 5 years, 9 months ago. Step #5) Add the following routines to main. In one task I'm using snprintf() to prepare a string with values. 0 Unable to use printf() outside of main, unless printf() is used at least once in main Dec 13, 2016 · The USART_SendData immediately appears on the UART, even when single-step debugging. Get the UART working by itself before trying to get printf() to work. Jul 24, 2020 · Editing in response to the first response. Feb 4, 2024 · To address Tesla DeLorean’s comments. It is very confusing for me. i. But with limited resource in RTOS, it can be dirty. Problems in driving it. No error on ide but also no output on uart. The code works fine on the STM32F469I-Disco, but I can’t find any information output in the console of System Workbench. In some steep, after project clean or some project changes, the printf stopped to work. I purchased a blackpill with STM32F401CCU6. Write my own implementation of fputc function, add stdio. Steps to configure the ITM in STM32CubeIDE. c:. Viewed 2k times STM32 printf over USB CDC. It enables users to easily create, develop, and debug Zephyr applications. HAL_UART_Transmit_DMA(dmi. Sep 15, 2017 · Posted on September 15, 2017 at 22:38 Hi to all I am new in STM32 and keil (I used Atmel chips) and now I am getting familier with them. – Apr 22, 2022 · In two places, your Makefile has the -nostdlib flag, which tells the linker to not link in the C standard library, which provides things like sprintf. Nov 25, 2024 · However, it has now stopped working in my project. I have been trying to use the printf tracing in my code without success, nothing is printed on the console. I have to enter a number, and only then the buffer pours all the data to the console so I see the console something like this: Sprintf() isn’t a target dependent function (sort of, but not really). The testcode is very simple, just create a standard template project for any stm32 (i tested this stm32f746ng), add code below somewhere. The second project the printfs() do not work using the same printf() & _write() function code again and I have verified it gets to the correct _write(), code shown below. 0 (the latest version) the default board clock is 550MHz. 0 STM32F429ZI DISC1: Keil printf not working. I can start a debug session, I can place breakpoints on my code, inspect variables and all works as expected but not the printf. 1. in STM32 MCUs Embedded Nov 14, 2021 · printf family is powerful and convenient with enough resources. Prerequisites. synchronous trace, generates errors (which are not reasonable for me, it complains about pin conflicts which are not really correct: asynchronous trace, which should be SWO ITM output seems to assume a 4bit Synchronous Trace config, with a TRACECLK input pin still available Apr 29, 2019 · When I create a new project and put in "-u _printf_float" as linker option and select "Use float with printf from newlib-nano (-u _printf_float) then sprintf does not convert float values. ) is not special in this regard. 0. Attached is a screen capture from our STM32 troubleshooting, it has several points that may help. But there is a difference. 27 to 5. Apr 24, 2015 · I'm programming on a STM32F437. Jan 7, 2021 · Hello. Also you need to enable Using float with printf from newlib-nano in MCU settings. in STM32 MCUs Wireless 2025-01-02; Virtual COM Port Not Working on NUCLEO-H755? in STM32CubeMX (MCUs) 2025-01-01; UART not working with LoRaWAN in STM32 MCUs Wireless 2024-12-25; USB DFU doesn't properly erase application flash, only allowing me to program once in STM32 MCUs Products 2024-12-25 Jun 6, 2018 · Solved: Posted on June 06, 2018 at 08:02 I try also to use S WO printf ( SWV , SWO viewer in ST-Link-Utility). c or even main. But i am not getting any thing on SWV ITM Data console and Timline Graph. Before I can get further understanding, I have to stick with the tiny printf. The easiest way to troubleshoot a problem is to tackle it in small pieces. What d Dec 15, 2015 · Another option, and probably better option is to use ST-Link, SWD debugger along with ST-Link Utility. What am I doing wrong? in STM32 MCUs Boards and hardware tools 2020-05-07; STM32F4, FreeRTOS, WLIP stops working after hours, no fault captured in STM32CubeIDE. 12; 2. c file itself, changing the definition in the syscalls. Main features: Install host dependencies. Jun 17, 2021 · The STM32 board is a completely separate computer, without any kind of knowledge of your console. Sep 19, 2021 · I am successfully using all the SWV debugging functionality in STM32CubeIDE except for the ITM functionality, as described in UM1609 and in the advanced debugging videos on youtube from ST. Mar 20, 2019 · I bet that the printf on the first run initializes some internal variables. Asking for help, clarification, or responding to other answers. Another good option is to output debug information over the serial port (UART). STM32CubeIDE ver. What can be a reason? Sep 26, 2019 · Why Doesn't My STM32 Bootloader Jump to the Application After a Hard Reset? in STM32 MCUs Embedded software 2025-01-12; Ethernet in TouchGFX Project on STM32H7S78-DK with FreeRTOS in STM32 MCUs Embedded software 2025-01-10; HardFault (CANopenNodeSTM32, traditional CAN - not FDCAN, FreeRTOS, chip = STM32L452RE) in STM32 MCUs Embedded software Mar 1, 2024 · Hi, I started a new project with selected target of Nucleo-STM32F767ZI board, and followed the instructions from "How to redirect the printf function to a UART for debug messages" The printf works in the new project, however, when I did the same in the example project "LwIP_HTTP_Server_Netconn_RTOS Apr 4, 2024 · I implemented a control block to check if the transmission is completed but it does not work. in STM32 MCUs Embedded software 2025-01-06; AD5668 DAC over QSPI on STM32L4 in STM32 MCUs Products 2025-01-05; I2C 16x2 Led Display. add option "Use float with printf from newlib-nano (-u _printf_float)" in the Tool Settings\MCU Settings. h in main. The Printf via SWO Viewer displays the printf data sent from the target through SWO. One can use printf() in main() without including stdio. HAL_UART_Transmit), but sometimes it’s easier to use the standard C library functions printf, scanf, and so on. check the buffer via debugger. I have STM32F767ZI nucleo board. c. Breakpoint does not reach fputc. But its not working. The example project uses HAL driver, not StdPeriphLib Jun 6, 2018 · - CubeMX for H7 is buggy: the debug config, e. Software: STM32CubeIDE v1. Nov 20, 2018 · Hi all, I have a problem to show float numbers via sprintf, I'm working with STM32F334. - Tracing doesn't work through SWDIO, you must also connect the ST-Link SWO pin to the STM32. Unfortunately, to utilize this function in an Oct 2, 2016 · I use this code for retarget printf(), but it does not work. Print \r\n only every 3rd call and you'll probably see the output all at once. 2f, the problem is that the first time the sprintf generate a valid string with decimal separator, but the next iterations not. 8 in STM32 MCUs Embedded Jun 18, 2019 · STM32C0 Can not Connect STMStudio After Upload Code in STM32 MCUs Products 2024-12-27; lcd1602+i2c+nucleo f401re don't work on stm32cubeide but works on keil uvision in STM32CubeIDE (MCUs) 2024-12-10; FMC communication works without debugger, but not with in STM32 MCUs Products 2024-11-21 Dec 7, 2020 · Printf is not the thing being buffered, it's stdio, so all similar functions will behave in the same way. While most platforms have their own APIs capable transmitting data over a UART bus, they all lack the power and popularity of the printf() function. STM32CubeIDE Version: 1. Its UART2 has already connected Stlink. The trace asynchronous debug dedicates the PB3 pin as a SWO pin. 0 Kudos Nov 11, 2009 · To clarify the title of the question: printf(. So nothing shows up until you send a "\n" or maybe some "\r\n" depending on your terminal settings. i'm using a stm32l073 MCU that does not have any FPU. c as generated by CubeMX. You have to connect the STM32 board to your system, usually with a serial port (and nowdays using a USB-to-serial converter) and then setup the serial port in the STM32 system to be used as the "console". It is not working. Although it works on stm32cubeMX, it doesn't work on bare-metal program. Datasheet has a lot of wrong information (e. As you can see in live expression window count is incrementing as expected. You just need to implement some things and you are ready to work. Sep 29, 2016 · If I declare my working variable as uint32_t it gives me the truncated answer. How to fix? Using STM32CubeIDE and gnu tools. h and it will compile fine. Jan 8, 2021 · I have managed to get it working. e. int _write(int file, char *ptr, int len) { /* Implement your write code here. in STM32CubeIDE (MCUs) 2019-12-13; How to redirect printf? in STM32CubeIDE (MCUs) 2019-06-04; Upgrade issues from 4. We can call the STM32 HAL functions (e. In this article we are going to take a look at how to integrate the C standard library into our project and set up printf() to send messages to our host machine via UART Feb 6, 2023 · stdout (what you redirect) is normally line buffered. At first, i wrote this control block by changing dmi. The -u_printf_float works though. That is not the case for using printf() in main. for printing I have to add this code otherwise not printing Dec 4, 2015 · Posted on December 04, 2015 at 13:46 Hi, all A newcomer in this product, I've been trying to do this for several days now. I'm not complaining that ST has done this - embedded libraries often need tweaks to work on limited hardware. Feb 4, 2024 · printf() not working in STM32 MCUs Embedded software 2024-11-25; Issue with DMA and ADC on STM32 Nucleo C031C6T6 in STM32 MCUs Embedded software 2024-11-24; Not able to print log on putty terminal in STM32 MCUs Products 2024-11-19; Issues with FM24CLXX_WriteData function in STM32 project in STM32 MCUs Products 2024-11-19 Jun 21, 2018 · STM32H7 SWO printf not working Go to solution. Oct 16, 2024 · You can find the working example with all the modifications on GitHub here: GitHub: stm32-hotspot. I have both tried overriding the "_write " function in main. Using the STM32CubeIDE v 1. I'm using SafeRTOS. Aug 2, 2021 · STM32F7 RS485 DE Enable Not working in STM32 MCUs Products 2025-01-13; Issue when enabling Secure User Memory on STM32H7B3 in STM32 MCUs Security 2025-01-13; Viewing SWO without STM32CubeIDE in STM32CubeIDE (MCUs) 2025-01-11; Ethernet in TouchGFX Project on STM32H7S78-DK with FreeRTOS in STM32 MCUs Embedded software 2025-01-10 Oct 21, 2018 · No, still not working. I would be careful though to work it so that your code example (should you decide to go that route) focus on the minimal part. wrong debug block/ROM table register based addresses, Oct 24, 2021 · Now, I noticed that there is a Console integrated in the IDE where the IDE automatically prints control information, compilation errors and such and I'd like to print the voltage (possibly using printf since I'm programming in C) here rather than using PuTTY, but it doesn't seem so straightforward (as in many other IDEs that I've used) from Dec 20, 2022 · Print formats are common fo all *printf functions. It is defined by the C standard library and is provided (almost certainly) by the tool chain. png Dec 3, 2021 · Tested in stm32g070 using UART3. Although all settings are correct, sprintf doesn't work with floating point number only. With ARM C, you are able to do this. f32, Mar 8, 2021 · STM32N6 boot application >64kB from external QSPI in STM32 MCUs Products 2025-01-15; STM32F7 RS485 DE Enable Not working in STM32 MCUs Products 2025-01-13; Help Understanding BSP_COM for Communication in STM32 MCUs Embedded software 2025-01-10; Using printf to output a large array cause the program to freeze in STM32 MCUs Products 2025-01-04 Oct 13, 2014 · and it crashes. Do I need to do any changes on the board to make it work? int _write(int file, ch printf() & scanf() redirection is supported by the library (independent of the IDE). #ifdef __GNUC__ /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf set to Aug 25, 2020 · printf should work just fine in C++. I've created new STM32CubeIDE project, initialized all peripherals by default. In order to enable printf() on host, I use: -specs=nano. Mar 17, 2019 · STM32F429ZI DISC1: Keil printf not working. To use floating point formats you must enable float printf library support as suggested by the compiler - look at the compiler messages when using the %f format for the first time. Please help. Torsten Jaekel. The problem is that the snprintf() fails to handle float May 25, 2019 · Use float with printf from newlib-nano (-u _printf_float)にチェック . Just a brief of my project: An ADC for a light sensor. With printf it does NOT work, without printf it DOES work. My setup: I have reimplemented the _write method: At this point you know the UART and your serial device work. Any suggestion about this issue? I just want to debug the variable to make sure I'm getting the correct measurement. This is not a hardware issue (BOOT0 pin suggestion). But I am still at a loss as to why this is. Please check the code below, but I did not see the prints on the console in STM32CudeIDE. I have created a new project and used default setup for the nucleo board. cpp or replacing "__IO_putchar" with "ITM_SendCha Nov 11, 2024 · SWO (SWV, printf via ITM) is completely broken (or ST-Link-Utility does not configure this CM7 properly) 5. Jun 21, 2021 · The terminal program is probably caching characters until it received CRLF. 2より古いバージョンでは、バグの影響もあって設定方法がだいぶ異なります。注意しましょう。 printfでfloatを使う設定 May 27, 2019 · Virtual COM Port Not Working on NUCLEO-H755? in STM32CubeMX (MCUs) 2025-01-01 lcd1602+i2c+nucleo f401re don't work on stm32cubeide but works on keil uvision in STM32CubeIDE (MCUs) 2024-12-10 Unable to download STM32CubeIDE in STM32CubeIDE (MCUs) 2024-11-28 Jan 15, 2017 · I add some”printf(“line: %d \n”, LINE);” in the example code. May 8, 2020 · Get external I2C3 working on Sensor Tile. If you use for the first time in the task it does it on the task heap and stack and none of the standard allocations may do not work in this context (printf uses the malloc function). To demonstrate the buffering, all you have to do is printf a lot of characters, usually more than 1024, and printf will print as you will have exceeded the maximum buffer length and it will automatically fflush. I'm compiling with GNUC compiler, linker etc as below via eclipse/system workbench for stm32. PS. This is fine and I would like to reproduce that on Freescale target. I made a project and I can send data to serial port with the following function : 'HAL_UART_Transmit(&huart1,(uint8_t *) 'Hello\\n\\r', 7, 10);' but I do not know Jan 2, 2017 · why i should reset every time i use external interrupts stm32 Precisely in keil u vision i'm using EXTIO for my motor dc control every time i debug i need to reset so my program work properly other wise only one motor is working the other no in STM32 MCUs Products 2021-04-24; CAN3 on NUCLEO-F767ZI is not working for me in STM32 MCUs Products Oct 3, 2022 · Hi, printf function not working in stm32cube_ide. Oct 18, 2014 · It would be nice, if you can simply just use printf to direct output strings to USART, LCD, etc. It have automatically set up some peripherals for me In my code, I want to print the debug messages to the console: while (1) { /* USER CODE END WHILE */ HAL_Delay(1000); Jun 28, 2019 · I'm new using STM32 microcontrollers. It would react the same way to putchar('\n'); , so printf(. I followed multiple resources to get it working which included the ITM Data Trace, OpenOCD semihosting, UART, etc. All other type are working well. in STM32 MCUs Embedded software 2025-01-06; Two Serial ports with HAL_UARTEx_RxEventCallback don't work for me in STM32 MCUs Products 2025-01-01; STM32H7RS and RS485 (USART not receiving anything in either interrupt or blocking mode) in STM32 MCUs Products 2024-12-17 So i am new to this STM32 family. Please help! Jun 28, 2019 · I'm new using stm32 microcontrollers, I have been trying to use the printf tracing in my code without success, anything is printed on the console . 7. I did a program to print via serial the voltage read from ADC, in float format like %4. Jul 30, 2019 · Non-working project: Working project: I am calling printf() in the code in both projects. I am using Keil uVision 5. I have an own board, which I am programming it using ST-Link V3set (I also couldn't get it to work with ST-Link V2). the first project the printf()s work and are tied to the _write() function which I have debugged and proven. I had the "use float with printf" option selected in the project properties (MCU settings) - see the screenshot below (not sure if this check box does the same as adding the flag manually) I tried adding the line -u _printf_float in the linked as suggested in your link, but I have the same results. When i debug the code and add breakpoint to . c file to cpp file and now print to SWV stops working. Try a more standard printf call like printf("%d", 0) and see if it works, perhaps hex isn't implemented. Your explanation is not bad, but code is way better. If you feel a post has answered your question, please click "Accept as Solution". Also add _DLIB_FILE_DESCRIPTOR in preprocessor. ver. Do not skip this step. Best regards, Aurélien Oct 19, 2023 · SD-card Works in 1-bit mode but it does not work in 4- bit mode. wrong debug block/ROM table register based addresses, Mar 14, 2021 · I had the same issue some time ago: - Debug / Debug configurations/ Select your debugging profile / Debugger tab / Enable Serial Wire Viewer (SWV). gmbekesypyyvjypispngmsgzzksixljiqbnriofodwftxiiqw