类型转换

byte转float

C#
byte[] byteArray = { 0xcd, 0xcc, 0x68, 0x43 };
//232.8
float floatnum=BitConverter.ToSingle(byteArray, 0);//232.8

C
//ESP8266
u8 byteArray[] = { 0xcd, 0xcc, 0x68, 0x43 };
//232.8
float floatnum=0;
os_memcpy(&floatnum,byteArray,4);
os_printf("floatnum%lf\r\n",floatnum);

数据处理

FIFO

C
#include "fifo.h"
#include "math.h"
#include <stdlib.h>

void FIFO_SAVE(fifo_TypeDef* fifo_name,u8 data)
{
	
	fifo_name->timer=0;
	
	fifo_name->data[fifo_name->write_cnt]=data;
	fifo_name->write_cnt++;
	if(fifo_name->write_cnt>(FIFO_SIZE-2))
	{
		fifo_name->write_cnt=0;
	}
}
u8 FIFO_READ(fifo_TypeDef* fifo_name)
{
	u8 data;
	data = fifo_name->data[fifo_name->read_cnt];
	fifo_name->read_cnt++;
	if(fifo_name->read_cnt>(FIFO_SIZE-2))
	{
		fifo_name->read_cnt=0;
	}
	return data;
}
void FIFO_TIMER(fifo_TypeDef* fifo_name)
{
	if(fifo_name->timer<1000)
	{
		fifo_name->timer++;
	}
}
void FIFO_INIT(fifo_TypeDef* fifo_name)
{
	memset(fifo_name->data,0,sizeof(fifo_name->data));
	fifo_name->write_cnt=0;
	fifo_name->read_cnt=0;
}

u8 FIFO_IS_NULL(fifo_TypeDef* fifo_name)
{
	if(fifo_name->read_cnt==fifo_name->write_cnt)
	{
		return 0;
	}
	else
	{
		return 1;
	}
}