freertos stm32

being to be output after the octave frequency, after the frequency divider set, the size of the chip hardware-related F (PLL general clock output) The clock frequency of the actual output of the PLL, referring to the middle part of the STM32 clock tree sysclk 168MHz max, the clock frequency of this point is f (PLL general clock Output), which is then divided for use by different devices F (USB OTG FS, SDIO, RNG cloc

development related knowledge, because St in the Chinese market share is indeed a bit high, the relevant information also has a lot. However, read the book is not as far as the road, Baidu search out a lot of documents, the accuracy of the final data or need to verify their own.The summary is: practice is the test of truth standards.2. About St Website searchFor most of the people who want to do technical development, there is a common problem, is that English reading ability is not very good,

only the MCUISP software setup: DTR's low-level reset, RTS high-input bootloader. You can download the code in one click without having to manually set the B0 and press reset. Where reset is the reset signal of the Development Board, the BOOT0 is the B0 signal of the start mode. Usb_232 is a miniusb, providing ch340g and computer communication interface, while the circuit board can supply power, VUSB is from the computer USB power supply, usb_232 is the main power port of the Development Board.

STM32 study notes-lighting LED lightsSTM32 I/O port has a lot of functions, so called GPIO (General PURPOSE)Wherein the GPIO is divided into a,b,c,d,e,f,g different groups, each group port is divided into 0~15, a total of 16 different pins, different chip pin number is different, the learning board for the STM32F103RBT6;Eight modes of I/O port:input floating space; analog input;Input pull-up;Open-drain output, push-pull output;Push-pull multiplexing f

Discussion on 32-bit CPU and 16-bit timer of stm32 The universal timer of stm32 can implement many functions, such as timing counting, measuring the pulse width of external signals, generating PWM waveforms, and measuring input PWM waveforms. In all these operations, the number of digits of the timer mainly affects two parameters, one is the precision of timing or measurement, and the other is

I have been working for more than three years. During this process, many projects have been developed due to the nature of my work, because software engineers not only knock on the code, this includes preliminary design, development history, document sorting, and so on. Therefore, we gradually made modifications during development, and made a set of templates based on stm32f103c8t6, mainly completed the Framework Design of some documents, boootloader integration, and communication protocol integ

After porting a program from a colleague, the startup file is found to be wrong and the call will continue tomorrow. It really killed people. Library files provided by stm32 are too trivial, just as there are as many chip models, such as startup files: The files found on the Internet are explained as follows: Startup_stm32f10x_cl.s interconnected devices, large-capacity stm32f101xx, stm32f102xx, and stm32f103xx Startup_stm32f10x_hd_vl.s large capacity

I recently learned stm32 and want to build a Smart car with my interest. I have to admit that I am still a real cainiao. I have learned a lot about it and I can't understand it after reading it for a long time. I have read about 51 on the Internet, and there are very few stm32 and very detailed information. I still don't understand it. Since I have finished it, I will share it with you and learn from each o

I. On use_stdperiph_driver issues in STM32 MDK Beginner STM32, when building a project using STM32 firmware library in RealView MDK environment, beginners may encounter problems with compilation. The following warning or error message appears: Warning: #223-D: function "Assert_param" declared Implicitly;assert_param (Is_gpio_all_periph (Gpiox)); In this case, we

After my painstaking research, I transplanted the matrix keyboard scanning program on the 51 Single-Chip Microcomputer to the stm32. At the same time, I also made great improvements. The biggest improvement is to shake the image. In the past, the delay latency was always about 10 to 20 ms, but this would cause the MCU to run falsely in the delay and cause the main program to be shelved. Obviously, the real-time performance of the program is greatly re

Stm32 has an interrupt source for the settable of 43 channels; AIRC (Application interrupt and reset register) registers have 4 bits for the specified priority. The four bits are used to assign the preemption priority and sub priority. They are defined in the stm32 Firmware Library as follows: # Define nvic_prioritygroup_0 (uint32_t) 0x700 )/*! 4 bits for subpriority */# Define nvic_prioritygroup_1 (uint32

Stm32 FSMC Study Notes FSMC stands for static memory controller ". After the FSMC controller is used, the fsmc_a [25:0] provided by FSMC can be used as the address line, and the fsmc_d [] provided by FSMC can be used as the data bus. (1) When the storage data is set to 8 bits, (fsmc_nandinitstructure.fsmc_memorydatawidth = fsmc_memorydatawidth_8b) The address corresponds to fsmc_a [], and the data bit corresponds to fsmc_d [] (2) When the storage data

, processing EV1, EV2 and EV4 canThe logic Analyzer is as followsThis experiment is the goal of this series of STM32-i²c experiments, because the work item requires me to go to the transplant to optimize the previous project, the project needs to configure the I²c slave device. But the original engineer has left the project, the company has no other position with the engineer can ask, had to step-by-step debugging. In the beginning, I did the verifica

(1) core_cm3.c, core_cm.h: Obtain and set the cm3 kernel, and configure some kernel registers. All cores that use the cm3 kernel are required; (2) Support files for stm32f10x. H, system_stm32f10x.c, system_stm32f10x.h, and startup_stm32f10x_hd.s: stm32, which are related to specific chips; ① Stm32f10x. h: the entrance to the standard peripheral library. The header file must be included in the Code of the standard peripheral library; ② System_stm32f10x

Do let Stm32 trigger Svc interrupt and pass in parameters and then switch to handler mode and modify the value of the special register, so as to achieve the shutdown interrupt, but in fact this program is directly privileged level, so do not enter handler mode can also modify the special register ... The following is a call to write the switch interrupt function: Created a new file asm.c, all of the assembly functions I wrote are in:

Super invincible? The tutorial is super-invincible, and the driver for this stm32 is Super Invincible (ROAR). But "carrier Poppy, SPWM, dead Zone, unipolar" These words if you are unfamiliar with the words suggest you still have to see the basic concepts of the relevant chapters of the electric power electronics course.Three. SPWM operation and outputthe generation of SPWM can be divided into software methods and hardware methods, hardware method thr

The channel of the DAC module outputs an analog voltage with the following detailed setup steps:1) Turn on the PA port clock and set the PA4 as analog input.Stm32f103zet6 DAC Channel 1 is connected to the PA4, so we first want to enable the Porta clock, and then set the PA4 as the analog input (although the input, but the STM32 inside will be connected to the DAC analog output).2) Enable DAC1 clock.As with other peripherals, you must first turn on the

STM32 UART Single-line half-duplex mode (cube version) 1. IntroductionIn some cases, a three-wire serial communication is required (only one of the signal lines), which requires a single-line half-duplex mode for communication. In this case, in the process of data protocol transmission, the signal end needs to switch back and forth in the input and output mode. Alternatively, the transmit and interface of the control port can be short-connected. In th

The 1.stm32 uses a successive approximation analog digital approach, so what is successive approximation?The successive approximation is similar to the dichotomy, taking the 8-bit data as an example; When an analog amount is entered, the first half of the 8 digits, i.e. 1000 0000, is compared with the analog value, then becomes 1, less than the next bit; set the next one to 1, then compare, greater than 0, and less than the same. Until the two numbers

of the speedpipemaxtranfer:64---33kb/spipemaxtranfer:512--265kb/spipemaxtranfer:1024--349kb/spipemaxtranfer:4096--457kb/spipemaxtranfer:65535--506kb/s mcu can first resolve the data that the PC sends via USB is for the update program, then the MCU exits the running program and goes to the "update program" status, and then runs the updated program after completion about STM32 speed : should b