stm32 programming

For the stm32 oscilloscope, there are a lot of online channels. I want to express my design ideas here. This project has been prepared for a long time. First of all, I would like to thank the previous team. I feel that Chen Shi and Yu have received many considerations from two experienced embedded engineers. If it is not for work adjustment or other reasons, it is very likely that the product will come out. However, I am deeply sorry for not finishing

Article Source Address: http://blog.sina.com.cn/s/blog_dc9244010102vtn1.htmlRecently in the study of STM32 PWM output, because the hands do not have an oscilloscope, so in accordance with the Wildfire tutorial using software simulation, using MDK5 Logic Analyzer to observe the waveform, the front all the way smoothly, in the logic Analyzer to open the Add Signal, the problem occurred--unknown signal! The signal cannot be added in. In the Baidu Library

. Do{Temp=systick->CTRL; //wait time arrives, here uses a small technique, through (TEMP0X01) examines the SysTick the enable bit, avoids the SysTick timer to be closed and causes the infinite loop } while((temp0x01) ! (temp (1 -))); SysTick->ctrl=~systick_ctrl_enable_msk;//Turn off CountersSystick->val =0x00;//Empty Counter}SYSTick TimerCM3 Core processor, the internal contains a SysTick timer, (SysTick clock from HCLK 8, 8 system clock cycle SysTick jump One, that is, 8*1/72M=1/9 u

STM32 Register version--Internal clock settingAlso remember to set the delay initialization function.1 //system clock initialization function2 //PLL: Selection of times, starting from 2, maximum value is3 //PLL: Select the frequency of times, where the internal clock is used, the PLL is 4 is 4 frequency4 voidstm32_clock_init (U8 PLL)5 {6UnsignedChartemp=0; 7Myrcc_deinit ();//resetting and configuring the vector table8 //rcc->cr|=0x00010000; //external

addresses are fixed and can be queried from the STM32 manual, or calculated based on St's official library files.2, allocating stack spaceStack_size EQU 0x00000400Area STACK, Noinit, READWRITE, align=3Stack_mem SPACE Stack_size__initial_spThis paragraph is excerpted from the startup file. To read this code, first understand the two commands.Area Command : The area Command instructs the assembler to assemble a new code snippet or data segment. Segment

Aiming at the problems of the attitude data measurement of the four-rotor flight controller, which is easy to be disturbed, the algorithm is realized and the design is difficult, the four rotor aircraft with the high cost-effective STM32F103VET6 microprocessor as the main control board are designed and realized. Using six-axis motion components MPU6050, electronic compass hmc5883l and barometer MS5611, the spacecraft attitude data were collected in real-time, and the attitude data was fused with

STM32 F4 Clock SourcesGoal:Routing clock sources to the microcontroller output pin (MCO1) high-speed internal (HSI) clock is 16mhzhigh-speed Externa L (HSE) clock is 8MHz (very precise) PLL CLK are configured to being 84MHz because I have a 100MHz oscilloscope (unfortunately Can ' t visualize the Max 168MHz)#include "mcu_config.h"int main (void ) { // Initializing and clocking pa.8 rcc_mco1config (RCC_MCO1SOURCE_HSI, rcc_mc

STM32 F4 Gpio Modes goal:creating A visual summary of GPIO configuration Modes. The summary at the bottom shows the major configuration choices.Basic electrical Info:gpios can sink or source up to±8 Ma, and sink or source up to±20 Ma (with a relaxed vol/voh)Except PC13, PC14 and PC15 which can sink or source up to±3ma.When using the PC13 to PC15 GPIOs in output mode, the speed should not exceed 2 MHz with a maximum load of pF.For more I/O static and A

levels, thus to detect the ambient light brightness change;4, do output can directly drive the store relay module, which can be composed of a light-control switch . Each pin function:In this experiment, the do pin is connected to the PA0 foot and the power is connected to the 3.3V power supply. while(1){ if(Gpio_readinputdatabit (Gpioa, gpio_pin_0) = =0) {gui_drawfont_gbk24 ( -, the, Red,gray0,"Bright"); }Else{gui_drawfont_gbk24 ( -, the, Red,gray0,"Dark"); } Delay_ms ( -); Delay

The product's unique identity is ideal for:Used as a serial number (such as a USB character serial number or other terminal application)Used as a password to improve the security of the code in Flash memory when writing flash, using this unique identifier in conjunction with the software encryption and decryption algorithm.Used to activate a bootstrap procedure with a security mechanism96-bit Product Unique identification The reference number provided for any one

STM32 Peripheral DMA Usage Summary:1. Select Dam mode as required:(1) cycle mode-dma_mode = Dma_mode_circular(2) Normal mode-dma_mode = Dma_mode_normal2. For DMA1 Chanel3, the corresponding peripheral is USART3 rxImagine: If the serial receive interrupt and the dam interrupt open simultaneously, how the CPU corresponds? (1) Interrupt priority is different: this is to say, support for nested interrupts (NVIC) CORTEX-M3 Natural Priority Service Interrup

after the bit-band operation is supported, a single bit can be read and written using normal load/store instructions. In CM3, there are two zones in which a bit band is implemented. One is the lowest 1MB range of the SRAM area , and the second is the minimum 1MB range of the inside and outside zones . The addresses in these two districts, in addition to being used as normal RAM , have their own "bit-band alias area", which expands each bit into a 32-bit word with the alias area. When you acc

This article transferred from: http://www.cnblogs.com/daqiang/archive/2012/03/10/2389336.htmlstm32f103 the APB1 maximum bus clock is AHB bus clock 1/2, the maximum is 36MHz, in the library function with St (v2.0), TIM2 (normal timer) clock frequency of 72MHz, do not know why?"Problem Analysis"There are up to 8 timers in the STM32, where the TIM1 and TIM8 are high-level timers capable of generating three pairs of PWM complementary outputs, often used f

, this kind of people's scientific literacy is higher, in engineers, engineering students are not rare.Talk less, how do you use AD converters?Take a source program as an example to read, and further understand the meaning of the symbol in STM32, I believe that later read Library source program, will be able to a higher level.To see it clearly, the following code is in blue, while some of the code inserted in the comment for this code is indicated in

When the test FreeRTOS is running on stm32, it needs to use the interrupt of the timer, then the interrupt is turned on, but the following code will cause the system to panic:/* Select Priority Group 0 */Nvic_prioritygroupconfig (nvic_prioritygroup_0);/* Turn on TIM2 interrupt, Level 0 first priority, Level 0 after priority */Nvic_initstructure.nvic_irqchannel = TIM2_IRQN;nvic_initstructure.nvic_irqchannelpreemptionpriority = 0;Nvic_initstructure.nvic

Environment: IAR ARM 5.3Stm32f103vbt6Use the pa.8 external input 10Mhz square wave. Data 4 can be obtained from Systick interrupts.4x5000 (prescaler value) x1000 (tick interrupt Time) =20mhzBelonging to the bilateral edge detection, a pa.8 pulse has 2 edges, so the clock doubles.Due to the use of ti1f_ed it is structured as follows:voidRcc_configuration (void ){ /*Setup STM32 System (Clock, PLL and Flash configuration)*/Systeminit (); /*Enable Gpioa,

#STM32移植uC/os-iitags (space delimited): ARM uc/os-ii---# #移植前相关知识介绍 # # # # # # # # #目标板与uC/OS-II system frame Diagram! [] (http://images.cnitblog.com/blog/665192/201408/301617582511830.jpg) # # #搭建文件结构! [] (Http://images.cnitblog.com/blog/665192/201408/301619070633006.png) # # #配置uC/os-ii-Modify os_cfg.h Disable semaphore, coprime semaphore, mailbox, queue, semaphore set, timer, memory management, shutdown debug mode, application software hook functi

The STM32 example code will have a code like this static __io uint32_t timingdelay; Here side of the __io modifier is not good understanding, single from the literal can be seen for IO correlation, check its standard library can know this __io originally was redefined in core_cm3.h, in fact, is volatile, the sentence is as follows/* IO Definitions (access restrictions to peripheral registers) */#ifdef __cplusplus #define __i NBSP ; Volatile /*!

Reference: STM32 data sheets, network information========================================= Cutting Line =========================================The external interrupt/event Controller consists of 19 edge detectors that generate an event/interrupt requirement. Each input line can be configured independentlyThe input type (pulse or hang) and the corresponding trigger event (rising or falling edge or bilateral edge are triggered). Each input line can be

The osc_in and osc_out are external crystal pins by default.If external crystals are not used on the STM32, the connection of osc_in and osc_out if the internal RC oscillator is used instead of the external crystal, proceed as follows:1) for 100 feet or 144 feet of products, osc_in should be grounded, osc_out should be suspended.2) for products with less than 100 feet, there are 2 kinds of mating methods:2.1) Osc_in and Osc_out are grounded by 10K res