Reputation: 1
When I write the software of the HCSR04 sensor in the "handletickevent" function on the ScreenView page, the screen freezes and does not work. How can I solve this problem? I want to loop the STM32F429's screen and I want it to refresh on the screen, but I couldn't. I would be very happy if you could give a different way or advice.
!! How can I show HCSR04 sensor with updated values on touchgfx screen?
Thank you very much everyone. Good Work.
#include <gui/screenhcsr04_screen/ScreenHCSR04View.hpp>
#include "stm32f4xx_hal.h"
#include "DWT_Delay.h"
uint32_t time;
uint16_t distance;
uint32_t Read_HCSR04()
{
uint32_t local_time=0;
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_SET);
DWT_Delay_us(10);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_RESET);
while(!HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_2));
while(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_2))
{
local_time++;
DWT_Delay_us(1);
}
return local_time;
}
ScreenHCSR04View::ScreenHCSR04View()
{
}
void ScreenHCSR04View::setupScreen()
{
ScreenHCSR04ViewBase::setupScreen();
}
void ScreenHCSR04View::tearDownScreen()
{
ScreenHCSR04ViewBase::tearDownScreen();
}
void ScreenHCSR04View::handleTickEvent()
{
time = Read_HCSR04();
distance = time / 58 ;
Unicode::snprintf(textArea2Buffer, sizeof(textArea2Buffer), "%d", distance);
textArea2.invalidate();
}
Upvotes: 0
Views: 927
Reputation: 89
You can't do business logic in a ScreenView, please handle it in its presenter. Use tick_handler to read your data, then update to your screen view. Suggest to get understand the MVP model of ToughGFX.
Upvotes: 0