we use the TIM2 and the board’s user LED (figure 3). Two callbacks are registered: one for the UART_Tx and the other one for the timer overflow, also known as period elapsed interrupt. By the end of this article, you should have the necessary knowledge to ...
So in order to use a GPIO pin as an external interrupt, we must set it in the SYSCFG register. This process is a little involved. To find an another article dedicated to this, seeHow to select a GPIO pin to be the source input of an external interrupt in an STM32F407GG...
We have also configured the Alarm, so make sure to enable theAlarm interruptin theNVICTab. We will use the LED connected to pin PA5 for the Alarm signal, so let’s set the pin PA5 as output. I2C Configuration We are using the LCD1602 to display the current Time and Date. The LCD ...
In this code example, it reads the first backup data register to see if it was written previously and if not, it will unprotect the backup domain and write to it. Once the code is executed the first time, we will do a reset of the STM32 using the button connected to the reset input...
Basically, when the MCU wakes up because of theUART interrupt, it goes back to sleep after processing theISR(i.e after printing the string), but when it wakes up due to theEXTI, the SLEEPONEXIT is disabled, and rest of the main function is executed as usual. ...
AN5537 Application note How to use ADC Oversampling techniques to improve signal-to-noise ratio on STM32 MCUs Introduction All STMicroelectronics microcontrollers embed an ADC (analog-to-digital converter) with a given resolution (number of bits) and sa...
If DMA requests are enabled, data are directly transferred to/from the SRAM thanks to the DMA, while the STM32 MCU remains in Stop mode. AN4991 - Rev 5 page 6/16 AN4991 Wake-up from a low-power mode in SmartRun domain (SRD) ...
I can't assign the USB endpoint address for the CDC ACM calss driver. The below is the compile command and configuration CLI: west build -b stm32f4_disco zephyr/samples/subsys/usb/cdc_acm The prj.conf file with the content: CONFIG_STDOUT...
You can also find the instructions in video form here:https://youtu.be/xbWaHARjSmk Goal If you follow all steps in the tutorial you should have an STM32 microcontroller with a micro-ROS publisher that transmits messages via UART to your PC running ROS 2. Here you can receive the message...
#ifdef __USE_CMSIS#include "LPC11Exx.h"#endif #include <cr_section_macros.h> int main(void) { Chip_UART_Init(LPC_USART0);Chip_UART_SetBaudFDR(LPC_USART0, 9600); // Set baud rate to 9600 // Send "Hello, World!" message using UARTconst char *helloWorldMsg = "Hello, World!\r...