This is a simple intelligent sensor system,which integrate light weight Mqtt server 、lvgl and so on technologies. Its functions include detecting temperature、humidity 、light intensity around the environment(can add more module by yourself),then show the data in touchscreen and you can get the datas by specified platform(here is mqttx server).
keil vscode stm32cubemx Squareline studio
- STM32F103ZET6
- Espressif
- ili9341(2.8 inch)
- DTH11
- Lightsensor
- LED
- Beep
- MQ2
- Motor(No add yet)
add a function in Gui.h as the lvgl refresh the screen
Find it in F1-Hal-MQTT-LVGL\LVGL\examples\porting\lv_port_disp.c
more message see in F1-Hal-MQTT-LVGL\LVGL\examples\porting\lv_port_indev.c
please follow Weidongshan video to set up
after download mosquitto , running it in windows command screen
cd "c:\Program Files\mosquitto"
.\mosquitto.exe -c mosquitto.conf -v
more message in F1-Hal-MQTT-LVGL\LVGL\APP\UI_demo\ui_events.c
Arc should be the label’s father element
Get the data from a global value,then put it into a static buffer by using “sprintf”,the follow the picture to encode.
In a similar way,control Led is same way,judge two state(checked or unchecked) to run led off or on.
- @attention: refer to FSMC , so pay attention to pins which come to correct port,especially in T_Pen、lcd_bl .
- @attention : Knowing what size in your mcu resources ,for the stm32f103zet6,its ram is 64k and rom 512k,rom looks enough,but focus on ram.
- @reason : because of lvgl has c++ element,don’t open the MicroLiB
-
@add : if you want to use “printf” to debug visually ,it is important to close semi-hosting pattern.
some codes help you close and add it in c document which everywhere.
don’t forget redirect the port
(refer to F1-Hal-MQTT-LVGL\SYSTEM\Uart_Redefine.c)
#if 0
#pragma import(__use_no_semihosting) // 确保没有从 C 库链接使用半主机的函数
void _sys_exit(int x) // 定义 _sys_exit() 以避免使用半主机模式
{
x = x;
}
struct __FILE // 标准库需要的支持函数
{
int handle;
};
/* FILE is typedef ’ d in stdio.h. */
FILE __stdout;
#endif
int fputc(int ch, FILE *f)
{
HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
return ch;
}
int fgetc(FILE *f)
{
uint8_t ch = 0;
HAL_UART_Receive(&huart1, &ch, 1, HAL_MAX_DELAY);
return ch;
}When you use the rtos created by hal bank,it is necessary to add heartbeat function in a important place
here is two way:
configUSE_TICK_HOOK need to set 1
but I find the second way easy to aggravate cpu burden
BaseType_t val;
/* 查询系统历史剩余最小内存 */
printf("FreeRTOS总内存大小: %d 字节\r\n",configTOTAL_HEAP_SIZE);//打印FreeRTOS总内存大小（单位字节）
printf("当前剩余堆内存大小: %d 字节\r\n", xPortGetFreeHeapSize());//查询当前剩余堆内存大小
printf("历史剩余最小内存大小:%d 字节\r\n\r\n",xPortGetMinimumEverFreeHeapSize());//查询历史剩余最小内存大小
/* 查询任务历史剩余最小内存 */
val = uxTaskGetStackHighWaterMark(SPITask_Handler);//查询SPI任务历史剩余最小内存大小（单位字节）
printf("SPI任务历史剩余最小内存:%d 字节\r\n",(int)val*4);
printf("MQTT stack is %d\r\n", (int *)uxTaskGetStackHighWaterMark(G_xQueuePlatform));- @attention : Don’t use software delay time in RTOS like as follow:
/**
* @brief 微秒级延时
* @param xus 延时时长，范围：0~233015
* @retval 无
*/
void Delay_us(uint32_t xus)
{
SysTick->LOAD = 72 * xus; // 设置定时器重装值
SysTick->VAL = 0x00; // 清空当前计数值
SysTick->CTRL = 0x00000005; // 设置时钟源为HCLK，启动定时器
while (!(SysTick->CTRL & 0x00010000))
; // 等待计数
SysTick->CTRL = 0x00000004; // 关闭定时器
}
/**
* @brief 毫秒级延时
* @param xms 延时时长，范围：0~4294967295
* @retval 无
*/
void Delay_ms(uint32_t xms)
{
while (xms--)
{
Delay_us(1000);
}
}
/**
* @brief 秒级延时
* @param xs 延时时长，范围：0~4294967295
* @retval 无
*/
void Delay_s(uint32_t xs)
{
while (xs--)
{
Delay_ms(1000);
}
}It will cause the messy time for rtos get
such as
program stuck in
if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ tskIDLE_PRIORITY ] ) ) > ( UBaseType_t ) 1 ) { taskYIELD(); }
it will never return the errQUEUE_EMPTY for stopping ,then enter prvildeTask
Using the basedtime and never to interrupt its running
void Delay_us(uint32_t xus)
{
extern TIM_HandleTypeDef TIME_BASE_DELAY;
TIM_HandleTypeDef *hHalTim = &TIME_BASE_DELAY;
uint32_t ticks;
uint32_t told, tnow, tcnt = 0;
uint32_t reload = __HAL_TIM_GET_AUTORELOAD(hHalTim);
ticks = xus * reload / (1000); /* 假设reload对应1ms */
told = __HAL_TIM_GET_COUNTER(hHalTim);
while (1)
{
tnow = __HAL_TIM_GET_COUNTER(hHalTim);
if (tnow != told)
{
if (tnow > told)
{
tcnt += tnow - told;
}
else
{
tcnt += reload - told + tnow;
}
told = tnow;
if (tcnt >= ticks)
{
break;
}
}
}
}
void Delay_ms(uint32_t xms)
{
for (int i = 0; i < xms; i++)
Delay_us(1000);
}
void Delay_s(uint32_t xs)
{
while (xs--)
{
Delay_ms(1000);
}
}When you rebuild the project by stm32cubemx,some place need to change,avoiding the errors occur.
set INCLUDE_xTaskGetCurrentTaskHandle 1 in F1-Hal-MQTT-LVGL\Core\Inc\FreeRTOSConfig.h
avoid redefine about Systick_Handler
#define USE_CUSTOM_SYSTICK_HANDLER_IMPLEMENTATION 0
USART3_IRQHandler need to be commented when use yourself interrupt
put it in F1-Hal-MQTT-LVGL\Core\Inc\FreeRTOSConfig.h
#ifndef CMSIS device_ header
#define CMSIS device header "stm32f1xx.h"
#endif