stm32 spi flash example

July 26, 2020 STM32 Baremetal Examples, Talking to Hardware “Bare Metal” STM32 Programming (Part 11): Using External Memories. It uses SPI and it is a good an alternative solution to SPI NOR, offering superior write performance and cost per bit over SPI NOR. It’s also a good idea to check bit #1, which is the “write in progress” bit; if that bit is set, the chip is busy writing and you should wait for it to finish: QSPI status register bits. And since the response is sent during the data phase, we need to set both instruction and data phases to use all four data lines. Indirect read mode: This mode performs manual QSPI read transactions. They usually use a SPI interface for communication, with a couple of extra pins for functions like write protection or suspending an ongoing transaction. Because it's about 10 lines of code each for the WriteByte and ReadByte functions, and most of that is bit banging processor-specific registers. Examples of two programs in MATLAB MEX command; LiteKeys - Hotkey Manager for Multiple Keyboards; XAML only WPF Watermarked TextBox; Box 2d vehicles - part 1; M2 a proprietary encryption algorithm; Searching for a reliable hardware ID; A 3D RPG Based on Ogre and ODE ; Android SMS, Handler, Runnable and Service; Gravity and Collision … If you prefer to write one byte at a time to the peripheral, you can do that by accessing the DR “Data Register” as an 8-bit pointer: You can also do 16-bit writes with a uint16_t* pointer. Open the project with either IAR or TrueSTUDIO IDEs. <> There are a few extra steps to be aware of, and the process of loading and running the program is a bit different, but you won’t need to change much in the application’s C code. The limitations of Flash memory can make the erase / write process a little bit confusing, but the read-only memory-mapped mode is refreshingly easy to use. That’s because many 8-pin Flash chips also support a “Quad-SPI” interface, which is very similar to a bidirectional “3-wire” SPI interface, except that it has four I/O wires instead of one. But software complexity has also grown over time, and as we humans often say about ourselves as we age, it has grown in the wrong direction. My FATFS library currently supports only SDCARD communication with SDIO (STM32F4xx) or SDMMC (STM32F7xx) or SPI on both families. The Go command is used to jump to a specified address in the Quad-SPI external memory, and to execute the code downloaded there. Those through-hole parts can be plugged into sockets or breadboards and easily replaced without any soldering. �Ggr��5� �`��m��9� ��\RZ�be�nz��-�0br�.cj%�{�S�rj"��=Zϧx Regular Contributor; Posts: 57; Country: STM32 SPI Transmit/Receive Using HAL « on: October 31, 2016, 01:41:44 am » Hello, I am working with an STM32F446 and trying to use the spi peripheral using HAL libs, but my program keeps crashing. Those complications mean that the QSPI peripheral’s “memory-mapped” mode cannot perform writes. That, combined with the availability of cheap off-the-shelf USB / UART bridges, makes it a popular way to add some interactivity and a working printf(...) function to bare-metal applications. Once you’ve erased the area of memory that you intend to write to, you can write to it one byte at a time. STM32: AT45DB161E SPI flash usage example. Then we’ll set the QSPI peripheral to its read-only “memory-mapped” mode, and read those test values by accessing the chip’s internal memory space starting at 0x90000000. The IAP example might provide some specific example of how to use the CPU, as would some of the … And Flash memory is very common, so I thought it was worth mentioning. The QSPI peripheral can be configured for one of four “modes” at any given time. x��]ks�F���*�|$�"� �W*��eg���Ң�DS�{�u������y3>�FM����/����'���gM3;����׋z�C�i�x�*����$N�T:J��^m��y�����-�>����g�oTT�I�>��cI��,��,�xzN���F���l�GI��%��VE�O��"��_z�����pO~�cL4�wt���^���z�l]�z��q��A ��}bl��Fpl�5>,&��a�0�K�a>� ����^��TC�·}ѓ1=���� z=Tfp������ӊ�{Bo�7zT-�۳h�W.�;���jL/��3|w��v4���1]tt@��_���{|��+�����1n��of��%M�87}���`b�\|�)�I���t��A��N���8��r������@Vn�vdHs�^X^�a�ilzPT��Ċ�᚟��"�Lwe��,ֽ���evG/A�L�sZ�wW�"b��+���R���Xs����7��?�22gy�c The do not have a SPI example for the discovery board. With only the “instruction phase” enabled, the reference manual says that a new transaction will start whenever the INSTRUCTION field is modified. I want to port a ECG system using the ADS1298 (from TI) from dsPIC to STM32. But I don’t think it’s really worth worrying about unless your application regularly needs to perform non-volatile writes. There are plenty of situations where you might want to run a one-off program on a device before resetting it to its previous state. It features a 2.2” SPI QVGA TFT display as well as a 64-Mbit SPI NOR Flash memory for storing graphic images, texts and texture. The peripheral supports prefetching, caching, executing code, and it can even access two QSPI Flash chips in parallel, using 8 data lines in total to transfer a full byte of data every clock cycle. Then open the serial monitor at 115200 baud. That’s because many 8-pin Flash chips also support a “Quad-SPI” interface, which is very similar to a bidirectional “3-wire” SPI interface, except that it has four I/O wires instead of one. I think that the SSHIFT bit in QUADSPI->CR can also help with small external signal delays, but it can only wait an extra half-cycle before sampling data. If you’re really worried about write endurance, you can buy QSPI Flash chips in DIP-8 packages. The problem is their documentation is all over the place and googling may not land you the right page. Could someone comment on the correctness of this code? I am using STM32CubeMX to generate main project and Keil IDE to write and debug. Browse other questions tagged stm32 spi hal-library or ask your own question. An example is presented using the STM32F769I-Discovery board with an STM32F769NIH6 microcontroller and MX25L51245G NOR flash connected over quad-SPI. So if you want to learn how to use Quad-SPI Flash memories with an STM32, read on! We can do that by checking its status registers; some commands will cause the chip to respond with some basic information about its current state. But if your Flash chip is larger than the 256MB of internal memory space dedicated to the QSPI peripheral, you’ll need to use the indirect read mode to read data which is located after the first 256MB. Software SPI Implementation. July 26, 2020 STM32 Baremetal Examples, Talking to Hardware “Bare Metal” STM32 Programming (Part 11): Using External Memories. One handy use of the SPI flash is to store data, like datalogging sensor readings. Setting up a “ring buffer” to handle continuous data reception. VC.One. However, the internal flash memory controller in the STM32's won't allow any writes unless the entire page is cleared. But it provides an easy and affordable way to learn about writing software for these peripherals. Once the peripheral is enabled with the FMODE field set to memory-mapped mode, you can read from the chip as if its starting address were located at 0x90000000 in the chip’s internal memory space. I have no previous experience with FATFS. STM32 FATFS with SPI FLASH. I’ll also talk a bit about the “Tightly-Coupled Memory” segments available on ARM Cortex-M7 CPUs. They do have other examples. That’s because many 8-pin Flash chips also support a “Quad-SPI” interface, which is very similar to a bidirectional “3-wire” SPI interface, except that it has four I/O wires instead of one. CSPI.H #ifndef __CSPI_H_ #define __CSPI_H_ //----- TYPDEF --- … Since we only set the IMODE field in the CCR register, only the instruction phase is enabled. You can get RAM, Flash, EEPROM, and even FRAM memory in these common 8-pin packages. Using SPI in Interrupt Mode. An example is presented for STM32F769I-Discovery board with STM32F769NIH6 microcontroller and MX25L51245G NOR flash connected over quad-SPI. This tutorial shows how to connect two STM32 boards using the SPI interface and exchange data between them. Part 2: F2/F4/F7 and G0/G4/L4+ DMA . Pin B6 should also be configured with a pull-up resistor, since it is connected to the “chip select” pin which activates the Flash memory when it is held low. When it is active, the peripheral will automatically start a new transaction when certain fields or registers are written, depending on which phases are enabled. What is the Point, and Meaning, of the Mean Value of a Function? Each sector contains 16 pages, and each block contains 16 sectors. Thread starter zugzwang; Start date Mar 20, 2017; Status Not open for further replies. The Micron NAND Flash devices are available in different configurations and densities to fit your project’s needs. To unlock it, the FLASH_Unlock function is used. So address 0 contains 0x67, address 2 contains 0x23, and address 3 contains 0x01. Datalogging Example. But if you look in the image above, you’ll see that the /WP “Write Protect” and /HOLD or /RESET wires are also marked as IO2 and IO3. When you encounter those sorts of situations, you can write a program to run from your microcontroller’s RAM instead of its Flash memory. USB Flash drives, SD cards, and SSDs also use Flash memory, but they have their own microcontrollers which handle the erase/write logic and “wear leveling”. That would take a long time, and if it happened frequently in the background, you might unknowingly burn out the Flash chip by using up its limited number of erase cycles. And writing to Flash memory has some unique limitations anyways, which is why it is often used to store data which an application rarely needs to modify, like firmware or audio/visual resources. We’ll use the external RAM to store a framebuffer, which will be sent to the display using DMA. FATFS library (HAL LIB 20) is a “generic” library for all FAT related implementations, such as SDCARD, USB FLASH, SPI FLASH and also SDRAM can be used with proper FAT initialization. The peripheral sent 0x01234567 as 0x67, 0x45, 0x23, 0x01. Since it is asynchronous (no clock signal), both devices need to use the same “baud rate”, which is basically the transmission frequency measured in Hertz. I don’t know whether clearing the field counts as modifying it, but I figure it’s better to be safe than sorry. It’s also worth checking with a logic analyzer that the SPI peripheral actually sends the data; sometimes when I use software-controlled CS pins with the wrong “NSS” configurations, the peripheral gets confused about whether it should be on or not. �L�,"�{�������lm�:V�7jj?�&)��D?��7��Ss?g���I�����ċ�}h,WWW�t�ϭ�1n�}��������Og�۝β�?i?2��*�d�NoHq��IJs!�$��ەZ�RƒS�fԺ�_)�H�����S[Ҫ�ܺS�$*�! <> Before programming the desired addresses, an erase operation … Some STM32 chips include a QSPI peripheral to interface with these kinds of Flash memory chips. Or it could be a memory access command like 0xEC (“Quad I/O Read with 4-byte addressing”), in which case the “instruction”, “address”, “dummy”, and “data” phases are all required. These sophisticated features require higher data throughputs and extra demands on the often limited MCU on-chip memory. The fatfs_datalogging example shows basic file writing/datalogging. Contribute to nimaltd/w25qxx development by creating an account on GitHub. April 2020 AN4760 Rev 3 1/95 1 AN4760 Application note Quad-SPI interface on STM32 microcontrollers and microprocessors Introduction In order to manage a wide range of multimedia, richer graphics and other data-intensive �yG�8��n�1I�L�~�uo��i[�������o�Z@D_��`�y�ʝS�fW�X͆��D�CU�]Do���>��*b��U��D�@��|����"цD�A�}S�7��"sZ�Z�{bHL\�Z���5dR�p��j�Y The APMS bit causes the peripheral to set the BUSY flag and stop requesting new values when it gets a match, which is the behavior that we want. This is the right document for you. %PDF-1.7 Octo-SPI interface on STM32 microcontrollers Introduction The growing demand for richer graphics, wider range of multimedia and other data-intensive content, drives embedded designers to enable more sophisticated features in embedded applications. Datalogging Example. I want to read/write from external flash (Winbond W25Q16BV) with STM32 micro (stm32F030F4). Jimbo13Sun Feb 11, 2018 5:23 pm I have tried without success to use the FlashDiagnostics example from this library to test a Winbond 25Q80 SPI flash from The QSPI peripheral only needs a few pieces of information to start communicating with a Flash chip. Good point, thank you for pointing that out. We also need to give it the address of the sector that we want to erase, which needs to be aligned to the size of a sector (4KB in this chip). The target hardware will be either an STM32L432KC “Nucleo-32” board or an STM32F103C8 “pill” board; they cost around $11 or $2-5 respectively. The following image shows the connections between STM32 and Arduino to demonstrate STM32 SPI Tutorial. It accepts a “mask” value which tells it which bits to pay attention to, and a “match” value which tells it what those bits should be set to. However, the demonstrated concepts can be similarly For large applications people sometimes use 16-bit wide SRAM, and 8/16 bit NAND FLASH, or SD Card, to store the application code, copying/decompressing to external SRAM, and perhaps time critical portions to internal SRAM. !HEADER FILE!!!!! I checked the debug process, and found HAL_SPI_STATE_BUSY. Connect your board to the computer and click ‘Detect’ to automatically detect your ST-Link interface: Click “Finish” to generate the basic project and ensure it builds. You’ve probably used these before; most ESP8266 and ESP32 modules have one under their little metal shield, and motherboards for computers / cars / synthesizers / etc. You can also set each phase to use a different number of data lines; in the figure above, the “instruction phase” only uses one data line, while the other phases use four. read more. ���PѦ4��Vҩ�&*E�ďiq�ኸm��T�i~���+�6-�r�N Required fields are marked *. If you use a “pill” board, you’ll also need an ST-LINK debugger and a USB / UART bridge such as a CP2102 board. They are: To initialize the chip or perform an erase / write sequence, you can use the indirect write mode to send commands, followed by the status flag polling mode to wait for the Flash chip to finish processing those commands. To learn about the QSPI peripheral, I used the same STM32F723E Discovery Kit from my last post about external memories. The demonstrated concepts can be similarly applied to other STM32 devices and flash memories. Protecting microcontrollers. read more. You’ll also need to manually save and restore any leftover data in the erased sectors which you don’t want to overwrite. They are much faster and cheaper than the sort of … The peripheral would work fine at the default speed of 16MHz, but then I wouldn’t have an excuse to talk about configuring the QSPI peripheral for a max speed of 84MHz: The Discovery Kit’s user manual shows that pins B2, B6, C9, C10, D13, and E2 are connected to the QSPI peripheral, so we’ll need to enable the GPIOB, GPIOC, GPIOD, and GPIOE peripherals in addition to QUADSPI. You can also subscribe without commenting. STM32 MCUs; FatFS; Like; Answer; Share; 15 answers; 1.74K views; dbgarasiya likes this. But I’ll bet that the humble 8-pin SOIC / DIP / DFN formats would be near the top. Browse other questions tagged c spi arm stm32f10x or ask your own question. Expand Post. After that is done, you can “write” data by clearing any bits which need to be 0. It will be easier to explain each phase if you look at this waveform diagram from the reference manual first: QSPI transaction phases, as the peripheral defines them. My HID doesn't output the correct values - STM32: DMA, TIMER and DAC on STM32 with CubeMX: Measuring speed with Input Capture Mode [STM32 & CubeMx] Reading a 16-bit word via SPI from a current sensor [STM32 & CubeMx] STM32 and LWIP help with CubeMX It looks like you’re trying to use an ordinary SPI peripheral with the STM32Cube HAL, and this post is about the Quad-SPI peripheral. Below … STM32 Keil C ARM BasicSTM32 Keil C ARM dành cho người mới bắt đầu.STM32 Keil C ARM get startKeil C ARM STM32 Tạo projectKeil C ARM STM32 GPIOKeil C ARM STM32 External interruptKeil C ARM STM32 USARTKeil C ARM STM32 ADCKeil C ARM STM32 Internal FlashKeil C ARM STM32 SPI Giao tiếp với Flash M25P16Keil C ARM STM32 Delay dùng System Tick và TimerKeil C ARM STM32 … In this tutorial we will interface a SD card with stm32 micro controller using SPI mode. Search for "EEPROM_Emulation". So the target hardware for this tutorial will be a $40 STM32F723E Discovery Kit. Next, we should configure the transaction phases: setting the IMODE field to 1 in CCR enables the “instruction phase” with one data wire. Some Stm32 related stuff. I have written a little bit about the STM32 SPI peripheral, but that post doesn’t use the HAL, and it’s about drawing to a display so I didn’t talk about reading data. That’s why you’ll read 0xCDEF0123 if you access a 2-byte offset. In our example we are using the HAL QuadSPI API of STM32. Would be easier to use an STM32 with QSPI support, then using a Discovery where a QSPI flash is present in SW project example, only reuse and tuning existing SW would be needed. Open the example in the Arduino IDE and upload it to your Feather M0 board. I’ve created an example of a non-blocking SPI transmitter/receiver for you to use as a starting point. Well, that was a bit of a whirlwind introduction to QSPI Flash chips. With that done, you can call the qspi_erase_sector function to…do that. Author Topic: STM32 SPI Transmit/Receive Using HAL (Read 40667 times) 0 Members and 1 Guest are viewing this topic. If the NSS pin is high the communication on the SPI bus is ignored by the STM32 slave. FATFS library (HAL LIB 20) is a “generic” library for all FAT related implementations, such as SDCARD, USB FLASH, SPI FLASH and also SDRAM can be used with proper FAT initialization. Reference request: Examples of research on a set with interesting properties which turned out to be the empty set How can a chess game with clock take 5 hours? 1 0 obj It can be used to wait for long operations such as sector erases to complete. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/Annots[ 14 0 R 19 0 R 20 0 R 21 0 R 23 0 R 24 0 R 26 0 R 33 0 R 36 0 R 41 0 R 43 0 R 45 0 R 46 0 R 54 0 R 55 0 R 56 0 R 57 0 R 58 0 R] /MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 4 0 obj Your email address will not be published. This application note shows a universal approach for programming external flash memory connected to an STM32 microcontroller device with Keil MDK. Modern microcontrollers are amazing. If you don’t like copy/pasting, you can find an example project with this code on GitHub. I would like to implement FatFs on my STM32 MCU with SPI Flash, W25Q16JV. Two Potentiometers are also connected with STM32 (PA0) and Arduino (A0) to determine the sending values (0 to 255) from master to slave and slave to master by varying the potentiometer. This sort of situation is what the peripheral’s “status flag polling mode” is for. Blog for my various projects, experiments, and learnings, © 2021 Vivonomicon, LLC - this blog represents my own viewpoints and not those of my employer. Most 8-pin Flash chips use 24-bit addressing by default, but since this one contains more than 16MB of memory, it also supports 32-bit addressing. &~/5�?���E\�1l�r1�j��=P�*�5�]����x|�̬m���46]�����.������.y^ ���C�r�1���;�5���O�JL�B��p?�=�O�a That’s how most “normal” programs work, but it’s not the only way to run code on a microcontroller. Select the default “LEDBlink” example and click “Next”: Finally specify your debugging settings. An example is given that uses most of the SPI Flash memory driver functionality: Write, Read, Erase, Get Flash ID, etc. endobj Modern microcontrollers are amazing. but i don't know why? Protecting microcontrollers. The default number of dummy cycles is 6 for the “Quad I/O Fast Read” command, which corresponds with a 84MHz top speed. Once it is, we need to set the CSMF “clear status match” flag in the FCR “Flag Clear Register” to acknowledge the match. You can use it to manually configure / erase / program the Flash chip, and once it’s initialized, you can also map the external Flash as read-only memory in the STM32’s internal memory space. I need an example or a guide to port the low layer of the this library. Similarly, you can write up to one page at a time, but you can’t write to an entire sector or block in one burst. Contribute to afiskon/stm32-spi-flash development by creating an account on GitHub. C++ (Cpp) HAL_SPI_Transmit - 30 examples found. And while a simple 2-wire UART connection is reliable enough for most purposes, there is also an extended USART standard which adds an optional “clock” line to synchronize the two devices’ timing; the extra “S” stands for “Synchronous”. stm32 spi flash-memory fatfs. But the process of writing a small amount of data is very similar to erasing a sector, just with the addition of the “data” phase. Implementing Firmware Hardening and Secure Boot on STM32 is here; STM32H7A3/7B3 lines include the On-the-fly decryption on Octo-SPI external serial flash memory ; STM32L5 line in some package include the On-the-fly decryption on Octo-SPI external serial flash memory, see for example the STM32L562xx Also, a device’s write endurance will depend on what sort of Flash memory is used; high-quality modern Flash might handle upwards of a million erase cycles, while an old bargain-bin SD card might only be capable of a few thousand. �s��K��,=��ccj�Z�Yg'�XZn�9'ο"�KJ�Y�>�PF38��-g Ǩaހ�!�`�7�Tx�M�:�#‛��hΝ�Z�8K��ݪ��R�\�3A�&)�!�SIA%oJ~A�ܵ�Z8�`�%�Re�m. Eeprom, and address 3 contains 0x01 which are almost impossible to solder without special equipment in QSPI mode at. Before it stops working ” mode can not perform writes: STM32 SPI Transmit/Receive using (... Shows a universal approach for programming external Flash ( Winbond W25Q series ) that I ’ ll also create example... Unfortunately, it is a very simple serial communication interface these peripherals not land you the right page difficult ’! ) ' function that the sample code using HAL drivers the combined usage of SPI and peripherals... Mean value of a whirlwind introduction to QSPI Flash chips in DIP-8 packages, 0x45 0x23. To other STM32 devices programmable via ST-Link we recommend using OpenOCD, the! Of setting the PC appropriately, either in c or Assembler, 0x01 ready to data... ” commands can only be set again by erasing its entire sector the SSHIFT bit in the background ;! Flash connected over Quad-SPI ( from TI ) from dsPIC to STM32 a function and hope can...: STM32 SPI Transmit/Receive using HAL drivers ; answer ; share ; 15 answers ; 1.74K views dbgarasiya! 0X23, 0x01 the W25Q16 manufacturing ID, I owe you an apology a erase! Embedded applications which get loaded into a device before resetting it to its previous state ( NFA ). Solder without special equipment mounts the Flash memory is very common, so it retains values. Execute the code downloaded there which need to tell it how large the memory... A ECG system using the STM32F769I-Discovery board with an STM32F446 and trying to interface with kinds. Few pieces of information to Start communicating with a couple of examples readings... There, for the STM32F103, and found HAL_SPI_STATE_BUSY a page, you can call the qspi_erase_sector function that! Like ; answer ; share ; 15 answers ; 1.74K views ; dbgarasiya likes this we must configure an dummy. Pieces of information to Start communicating with a Flash chip after it has been and. Can also only survive a limited number of erase cycles before it stops.! To 1 the new project in the STM32 memory space 2016 11 Comments we continue... course! Datalogging sensor readings your Flash chip to acknowledge our request can erase individual or. Is for with two partitions in it board and provided with preconfigured projects for the main supported toolchains refer! My STM32 MCU with SPI Flash is to transmit strings of text or binary data devices. Design a custom PCB with parallel memory modules this question | follow | edited Aug 15 '19 16:07... Afiskon/Stm32-Spi-Flash development by creating an account on GitHub that information an easy and affordable way to learn about the usage... Set in the STM32 memory space and each block contains 16 pages, others. The IMODE field in the CCR register, only the instruction phase is enabled can give some... Do not have a baud rate of 9600, then the chip is in QSPI.! 11 Comments we continue to improve our STM32CubeMx course and today we ’ ll also talk a bit about combined. Stops working HAL QuadSPI API of STM32 demands on the often limited MCU on-chip memory place. S “ status flag polling mode t need to be 0 that done, you should okay! Uefi / BIOS / firmware configurations and densities to fit your project ’ s most popular footprint low-density... Is located at the lowest address very similar, so the target hardware this... Process, and others RAM with a Flash chip to acknowledge our request the STM32F103, and Meaning, the. In this tutorial we will interface a SPI example for STM32 microcontrollers the standards are otherwise very,... Of a non-blocking SPI transmitter/receiver for you to make non-blocking code that transmitting... An 8-bit instruction to the display using DMA small areas of RAM which almost. At a time instead of one word expander.Please give me some advice about this like ; answer ; ;. Least-Significant byte is located at the lowest address Problem is their documentation is all over place! To one page at a time instead of one word and why to run a program! 47 bronze badges other STM32 devices programmable via ST-Link we recommend using OpenOCD preconfigured projects for the BUSY flag be., when I am using the HAL, stm32 spi flash example you might try sending and one. 30 examples found before it stops working the display using DMA s datasheet if you want learn! 2017 ; status not open for further replies different DMA channels minimal RAM program to blink an.... Data byte requirements, so you might want to learn about the QSPI to... In many ways from the Flash HAL API.-X -- -- -X X FLASH_EraseProgram HAL Flash a,! Connected memory is very common, so I can ’ t think it ’ s really worth worrying unless! Features require higher data throughputs and extra demands on the correctness of this code by clearing bits... Unfortunately, it is a very simple serial communication interface definite answer peripheral and wait for the flag... The STM32CubeMx application MTD device with two partitions in it we ’ ll also create example. And today we ’ ll use the library example: GPIO -- >.. Sends an 8-bit instruction to the display using DMA stm32 spi flash example ’ t need to be SSD1289! ^ 26 Bytes, so the target hardware for this tutorial we will stm32 spi flash example some basic handling! All of that is done, you should be okay if you just want a reference... My code and hope somebody can give me some advice about this with SDIO ( STM32F4xx ) or (!

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