First initialize the clock APB2
1. Configure input/output mode and pin speed (GPIOx_CRL or GPIOx_CRH)
2. Read or write IO port data
2.1 Read IO port data (GPIOx_IDR)
2.2 Write IO port data (GPIOx_ODR, GPIOx_BSRR, GPIOx_BRR)
3. Lock the IO port data until the next reset (GPIOx_LCKR)
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Recommended ReadingLatest update time:2024-11-16 16:31
STM32 remapping and address mapping
Remap In stm32, some ports' peripherals have been used by other pins. In this case, port remapping is needed to solve the problem, which is very convenient. Take USART1 as an example The steps for remapping are: Turn on the remapped clock and the USART remapped I/O port pin clock, RCC_APB2PeriphClockCmd(RCC_APB2
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STM32SPI read and write functions
//SPIx read and write a byte
//TxData: Bytes to be written
//Return value: the bytes read
u8 SPIx_ReadWriteByte(u8 TxData)
{
while((SPI1- SR&(1 1))==0);
SPI1- DR=TxData; //Send a byte
while((SPI1
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KeilMDK4.22 compiles STM32 project warning: warning: #223-D
Build the project and compile a lot of errors and warnings: ..\FWlib\src\stm32f10x_usart.c(135): warning: #223-D: function "assert_param" declared implicitly ..\FWlib\src\stm32f10x_usart.c: assert_param(IS_USART_ALL_PERIPH(USARTx)); ..\FWlib\src\stm32f10x_usart.c: ^ ..\FWlib\src\stm32f10x_usart.c(184): warni
[Microcontroller]
STM32 GPIO register introduction and settings
Each GPIO port has two 32-bit configuration registers (GPIOx_CRL, GPIOx_CRH) to control the high and low eight bits of each port respectively. If the IO port is 0-7, write the CRL register, if the IO port is 8-15, write the CRH register, two 32-bit data registers (GPIOx_IDR, GPIOx_ODR), one is read-only as input data
[Microcontroller]
Significance of assert_param function
In the STM32 firmware library and the provided routines, assert_param() can be seen everywhere. If you open the stm32f10x_conf.h file in any routine, you can see that assert_param is actually a macro definition; in the firmware library, its function is to detect whether the parameters passed to the function are valid
[Microcontroller]
57. STM32 CAN controller principle and configuration
1. Introduction to STM32 CAN controller - bxCAN What is bxCAN: STM32 comes with a basic extended CAN peripheral, also known as bxCAN. The F103 has up to 14 filter banks, the F407 has 28. (II) Introduction to the modes of the STM32 CAN controller Working mode: It must be in initialization mode at the beginning to
[Microcontroller]
STMicroelectronics releases security software to protect STM32 edge AI devices connected to AWS IoT Core
New developer software for STM32H5 simplifies secure connections between IoT devices and AWS using ST’s Secure Manager software
October 10, 2023,
China - STMicroelectronics (STMicroelectronics), a world-leading semiconductor company serving multiple electronic applications, recently ad
[Embedded]
STM32 printf semihost mode
After reading the problem of printf function redirection in the usart section of Atom Brother, I tried it myself. The microcontroller can print information through the serial port, and the printf function is very convenient to use after redirection. Redirection refers to modifying the underlying function of printf s
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