freertos stm32

1 reviewsI/O port is a very common peripheral in the microcontroller, STM32 I/O port has 8 states, although the use of the process has not encountered any problems, but has not been very clear, so here is a summary (actually the concept is also and STM8 and other microcontroller, understand the 8 state, It also basically understands most I/O ports).2 colorsWe can see the following code in "Stm32f10x_gpio.h" in the library file: typedef enum

Recently in the study of STM32 interrupted nesting problem, finally found a good understanding of the method, perhaps I was too stupid to record!The STM32 has 43 channel settable interrupt sources, and the AIRC (application Interrupt and Reset Register) registers have 4 bits for the specified priority. These 4 bits are used to assign preemption priority and sub priority, as defined in the

The input and output pins of stm32 have the following eight possible configurations: (4 input, 2 output, and 2 reuse output) 1. Float _ in_floating 2. Pull input _ IPU 3. drop-down input _ IPD 4. Simulate input _ Ain 5. Open/leak out_out_od 6. Push and pull out_pp 7. push-pull output of reuse function _ af_pp 8. Out-of-the-box output of the reuse function _ af_od Pull-up: input a high level, followed by an pull-up resistor (for protection). pull-up in

signals of WR and RD are reversed (WR = 1, RD = 0), then the written signals are converted into reading signals. Under the reading signal, the main control chip needs to read the value of the DB0-15, And the LCD control chip will set the value of the DB0-15 to complete the time sequence of reading data. The timing of reading registers is troublesome. First, both WR and RD should be set low, and the master chip should pass in the Register address through the DB0-15. The second step is the same a

I reported this error when I gave the stm32 program today. I searched the internet for a long time and found a reason and a solution. The online statement is as follows: Cause: Burned programsDisable the JTAG function.,JTAG interfaces are reused.. Solution 1: Find boot1 and boot0, lower boot1 and boot0 to 3.3 V, and download a program through the serial port. This program does not close JTAG, and then you can normally re-use JTAG, set bo

Encethernet-based freemodbus-TCP Porting and testing on stm32 Daniellee_ustb QQ: 382899443 Modbus-RTU was transplanted yesterday. The free Modbus-TCP Transplantation on encethernet started tonight. The development board used is the firebull Development Board and the network solution of stm32f103 + enc28j60. The mainstream TCP/IP protocol stacks include UIP and LWIP. The encethernet protocol stack is a simple protocol stack provided by manufacturers an

In the MDK environment, the ucgui of version 3.90 is finally transplanted to the stm32. The routine code is displayed on the Internet, and the tutorial Method for porting ucgui under stm32 is rarely seen, for your convenience, you can use this porting Method for reference. (If you have any mistakes, please give us some advice and discuss them together !)Procedure:Step 1: First, you must write your TFT drive

Build an open-source development environment for STM32 Based on Eclipse Recently, the project was not busy. I thought it would be okay to look at simple embedded systems and get things done. So we started with the cheap STM32. Because we have been developing PC software for a long time, VS's intelligent perception is a good one. In contrast, Keil is as low as a text editor. So I want to change the developme

STM32 use J-Link to burn write Error: Flash Download failed, stm32j-link IAnd symptom An error occurred while burning data using J-Link for STM32. The error message is as follows: 1. Error: Flash Download failed-Cortex-M3 This is the pop-up information of the compiler. 2. ** JLink Warning: cocould not set S_RESET_ST This is the display information printed in the compiler debugging window. Ii. Cau

One of my ways to learn new knowledge is: 1. Grasp the framework, content, and scope of the new things; In short: Clarify the architecture and grasp the key points; 2. When looking at the knowledge involved in the framework of Chu Da, measure which of the following are the things I need to learn (the key points) and which are the things I can learn later; In short: Go to what I need and use it for me; 3. Based on the theory, master the theoretical knowledge, and apply it to better unde

STM32--C language data type In the programming process, the data types of different CPUs have different meanings. Therefore, you must pay attention to the definition and conversion of the corresponding variable data types, otherwise, an uncertain error may occur in the calculation. (1) type data in C Language Integer: int short long Real Type: Float double There are many data types and common variables in