当你不在4.321后加f时,stm32F405的片子不知道把他当做单精度float用FPU来运算,,默认可能是当做double来运算(我不确定),运算速度还是很慢。。切记所有浮点数字后面加上f,,,有时候keil会提示warning: #1035-D: single-precision operand implicitly converted to double-precision 这句话的意思就是单精度运算隐式转...
password);while(WiFi.status()!=WL_CONNECTED){delay(1000);Serial.println("Connecting to WiFi...");}}voidloop(){// 假设在这里接收到温湿度数据floattemperature=25.0;// 静态数据,仅作
You could also write your own float to string routine of some sort. Wouldn't be hard, especially if you know the expected data range. 0 Kudos Reply rrnicolay Associate II In response to Bob S 2019-12-17 10:45 AM Thanks for your help, @Bob S ! I was already looki...
例如:const float Pi=3.14; 声明时必须为只读变量赋一个初始值,因为在程序中不能改变只读变量值。如果不定义只读变量的数据类型,则默认为整型,因此如下两条语句等价:const int Number of group=5; const Number of group=5; 只读变量在定义时,const用在类型说明符前后是等价的,因此如下两条语句等价:...
//相邻节拍时间extern intBPM;//心率值extern int Signal;//原始信号值extern unsigned charQS;//发现心跳标志short aacx,aacy,aacz;//加速度传感器原始数据short gyrox,gyroy,gyroz;//陀螺仪原始数据floatTO=0;//红外测温温度-目标温度floatTA=0;//红外测温温度-物体温度//蓝牙发送缓冲区u8BLE_TX_BUFF[...
#include"stm32f10x.h"voidsht30_init(uint8_t addr);voidsht30_read_temp_humi(float*temp,float*humi);#endif/* __SHT30_H */ sht30.c: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #include"sht30.h"#include"i2c.h"#defineSHT30_CMD_HIGH0x2C#defineSHT30_CMD_MIDDLE0x06voidsht30_...
static ai_float out_data[AI_MY_HAR_OUT_1_SIZE]; /* Array of pointer to manage the model's input/output tensors */ static ai_buffer *ai_input; static ai_buffer *ai_output; static ai_buffer_format fmt_input; static ai_buffer_format fmt_output; #define NSIZE 3 void buf_print(void...
---*/voidDT_Send_Speed(float x_s,float y_s,float z_s) {u8_cnt=0; vs16 _temp; data_to_send[_cnt++]=title1_send; data_to_send[_cnt++]=title2_send; data_to_send[_cnt++]=0x0B; data_to_send[_cnt++]=0; _temp = (int)(x_s...
如果你只有C语言基础，你有上面这些疑惑，是非常非常正常的。因为C语言只是一门编程语言，在单片机上，你...
float euler_angle[3] = {0, 0, 0}; sys_mpu_config();/* 配置MPU */sys_cache_enable();/* 使能Cache */HAL_Init();/* 初始化HAL库 */sys_stm32_clock_init(300, 6, 2);/* 配置时钟,600MHz */delay_init(600);/* 初始化延时 */usart_init(500000);/* 初始化串口 */led_init();...