stm32f4

When used to the use of bare metal and began to feel that there are a lot of things not perfect, especially when encountering one of the delay function in the run when the special embarrassment, a lot of things can not be done, only wait until the

This article is "Alientek stm32f429 FreeRTOS Development Course" Chapter II study notesChapter One notes –freertos Introduction and source code download First, transplant 1. Prepare the project documents The MCU uses the stm32f429 core, creating a

I. Overview: The Usart is a universal synchronous asynchronous transceiver for flexible full-duplex data exchange with external devices, which supports a variety of communication modes and provides multiple baud rates via the fractional baud rate

is engaged in the subject of intelligent prosthesis, need to use, this to my implementation to play a very good guiding significance, hereby reproduced, and hereby thank the author, https://blog.csdn.net/qingelife/article/details/78429508 Use the

Reproduced Tags: stm32 ccm it Category: Embedded CCM (core coupled Memory) is dedicated to the F4 core full-speed 64KB RAM, they do not go through the bus matrix, the F4 core directly connected to it, the address space in

The following is the implementation of the serial port dma+ ring buffer, the data transmit and receive is asynchronous, do not need death. about ring Buffers reference: http://blog.csdn.net/jieffantfyan/article/details/53572103 Implementation

These days using the STM32F4 series of CPU design projects, the performance is very powerful, arm and DSP two core one, known as DSC.After designing the hardware, we started to design the software with two directions: one is to use the library function and the other is to use the real-time operating system. Other direct registers of the software to avoid the writing, repeating the wheel makes no sense.Here are some usage experiences: (referencing a de

-eval2-based on the Stm32f439nih6, it includes an ST-LINK/V2 embedded debug tool, a 5.7 "color TFT LCD with cap Acitive touchscreen (480 x 272 pixels), an 8M x 32-bit SDRAM, 1M x 16-bit SRAM and 8M x 16-bit NOR Flash, Ausb OTG micro-a B Connector, LEDs and pushbuttons.Stm32f4-discoveryNucleo-f411re-stm32 NUCLEO Development Board for STM32F4 Series-with stm32f411re MCU, 512KB flash memory, TQFP64 packaGE, it includes an ST-LINK/V2 embedded debug tool.

Hardware Platform: STM32F4-Discovery Software environment: mdk470a MCU frequency: 168 m 1. stm32f4 MDK: Create a project for using the database 2. stm32f4 gpio breathing lamp [database function operation] 3. usart of objective F4 [database function operations] 4. Use printf in the stm32 MDK Project 5. Notify F4 half-baked DMA/usart sends data [database f

FSMC LCD Color Learning Color Screen Driver Here is the main use of the 8080-port interface, color screen here with the controller and without the controller, 80 and the mouth has the following signal lines: CS: Chip selection signal WR: Write Data RD: Reading data RST: Resetting RS: Command/Data flag (0: Read-write command 1: read-write data) 80-Port Read and write process: ①: Set RS According to the type of write or read data to choose (RS: Command/Data flag (0: Read-write command 1: read-wr

STM32F4 Related information:http://www.stmcu.org/document/list/index/category-523Introduction of standard Firmware LibraryThis article downloads the stm32f4xx_dsp_stdperiph_lib_v1.5.0, as shown in the folder:Where the project folder is a template project for each development environment (Mdk-arm, Ewarm, Truestudio), the Utilities folder is the standard firmware library application routine for the official evaluation board, and the true standard firmwa

.png "/>STM32F4 Series650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/76/05/wKiom1ZINXCjuKzeAAcv-33ar1k790.png "title=" Stm32f4.png "alt=" Wkiom1zinxcjukzeaacv-33ar1k790.png "/>STM32F4 Typical Representative :STM32F407ZGT6Stm32f407zgt6.pdf650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/76/05/wKiom1ZIOTyTKTPdAAEWVtCeY4Y109.png "title=" Stm32f

chip Support DSP command function, the main frequency 100MHz to 200MHz, such as STM32F4 and other models. The two cores of the chip can be based on library functions to write programs, or based on registers directly write programs, you can run a lightweight operating system, such as Ucos. This type of chip is only suitable for the design of less complex products, the network protocol has certain requirements of the product is not recommended to use t

and software can be compatible, no friend can try to see the manual pin, register address and so on basically the same). There are a lot of chips are similar, the unbelief of friends can try.Well, the return to today's topic, about the STM32F4 series Chip development, more details, please look down.based on the principle of free sharing, easy to learn knowledge of mobile phones, regularly share technical knowledge on the platform. If you feel that t

PrefaceThis article explains how to set the interrupt priority for the STM32 cortex M3 and M4 series MCU in the FreeRTOS embedded operating system. Summary"1" STM32L1 series, STM32F1 series, STM32F4 series, set NVIC need to use Nvic_prioritygroup_4. The "2" preemption priority is larger than "MAX" and smaller than "LOWEST". such as Configlibrary_max_syscall_interrupt_priority=5 configlibrary_lowest_interrupt_priority=15 The specific value of the Nvic

http://bbs.21ic.com/forum.php?mod=viewthreadtid=679682page=1#pid3911906 Pic does not have a programmatic reset, and the probability that you can get into the programming state is very small, and the probability that you are present is very high, which means it is not caused by this problem.In fact, the ESD reset is basically affected by the reset of VCC and MCLR, such as when you test for an IO port, because the pic IO port has a VCC/GDN pull/drop-down embedded diode, because the electrostatic

half-duplex on a data line. 4) Serial data SDATA1, output data, is a binary complement of audio data, full duplex has two data lines. 5) MCLK, called the Master Clock, also known as the system clock (Sys clock), is 256 times times or 384 times times the sampling frequency. To enable better synchronization between systems 1.3 I2S Audio Standard Four different audio standards: 1) i2s Philips Standard. 2) MSB alignment standard. 3) LSB alignment standard. 4) PCM standard. 1.4 Frequency calcula

, that is, the floating point instruction set, therefore, when processing mathematical operations, the performance is dozens or even hundreds of times higher than that of M0/m3. However, to fully utilize the mathematical performance of FPU, you still need some small settings: 1. compile control option: although the corresponding code is added to the system_stm32f4xxx.c file of the stm32f4xx Firmware Library, but it is not in the STM32F4-Discovery rout

latest UCOS2.92. Transplant good, independent 4 projects for everyone to download learning, research. Set up the task is the same, only for the chip, the ports directory under the relevant source code is different, the standard peripheral library also has differences. Each series for different types of chips just need to change the "model" on the line.Software engineering that provides downloads is run on the board, ensuring that no problems are uploaded to the 360 cloud disk.Ucos based on STM3

The reset circuit of the stm32f411 chip in the Wang Gong's small board is as follows:In fact, this circuit is wrong, after the actual measurement, stm32f411 chip runtime reset pin is high, and in this circuit diagram, in fact, the stm32f411 chip runtime reset pin level to see the low level, according to this circuit, press the button, Will cause the level to jump to the high level to trigger the reset, however, in fact it is not so, stm32f411 reset pin in the pull-up resistor (measured), so even