stm32读写 DS2431

//延时标志
#define CALC_TYPE_S 1
#define CALC_TYPE_MS 2
#define CALC_TYPE_US 3
/*--------------------------------------------------------------------------------------
电可擦除只读存储器ＤＳ２４３１操作控制命令代码的字符化常数定义：
--------------------------------------------------------------------------------------*/
#define DS2431_FAMILY_ID 0x2D // ＤＳ２４３１家族码
#define DS2431_WRITE_SCRATCHPAD 0x0F // 写入数据到高速暂存存储器
#define DS2431_READ_SCRATCHPAD 0xAA // 读取高速暂存存储器中的数据
#define DS2431_COPY_SCRATCHPAD 0x55 // 复制高速暂存存储器的数据到ＥＥＰＲＯＭ中
#define DS2431_READ_MEMORY 0xF0 // 读取ＥＥＰＲＯＭ中的数据

/*--------------------------------------------------------------------------------------
电可擦除只读存储器ＤＳ２４３１操作参数的字符化常数定义：
--------------------------------------------------------------------------------------*/
#define DS2431_ERROR -1000 // 错误代码，ＤＳ２４３１数据超出范围
#define DS2431_SET_SUCCESSFUL 0x00 // 设置ＤＳ２４３１操作参数成功返回码
#define DS2431_SET_FAILED 0x01 // 设置ＤＳ２４３１操作参数失败返回码
#define DS2431_FAILED_MAX_NUMBER 0x08 // 设置ＤＳ２４３１最大操作失败次数值

#define DS2431_P0_ADDRESS 0x0000 // ＤＳ２４３１的存储器页０起始地址
#define DS2431_P1_ADDRESS 0x0020 // ＤＳ２４３１的存储器页１起始地址
#define DS2431_P2_ADDRESS 0x0040 // ＤＳ２４３１的存储器页２起始地址
#define DS2431_P3_ADDRESS 0x0060 // ＤＳ２４３１的存储器页３起始地址
#define DS2431_MAX_ADDRESS 0x007F // ＤＳ２４３１最大可访问地址

void TIM5_Init_Query(u8 type)
{
TIM_TimeBaseInitTypeDef Tim5;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5,ENABLE);
Tim5.TIM_Period=1;
if(type==CALC_TYPE_S) //延时以S为单位时，时钟频率57600Hz，外部需要1250次计时
{
Tim5.TIM_Prescaler=57600-1; //预分频 72MHz / 57600= 1250Hz
}else if(type==CALC_TYPE_MS)
{
Tim5.TIM_Prescaler=2880-1; //25000Hz ,定时器计数25次为ms
}else if(type==CALC_TYPE_US)
{
Tim5.TIM_Prescaler=72-1; //1MHz ,计数1次为us
}else
{
Tim5.TIM_Prescaler=7200-1;
}
Tim5.TIM_ClockDivision=0;
Tim5.TIM_CounterMode=TIM_CounterMode_Down; //向下计数
TIM_TimeBaseInit(TIM5,&Tim5);
}

void TIM5_S_CALC(uint32_t s)
{
u16 counter=(s*1250)&0xFFFF; //前提定时器时钟为1250Hz
TIM_Cmd(TIM5,ENABLE);
TIM_SetCounter(TIM5,counter); //设置计数值

while(counter>1)
{
counter=TIM_GetCounter(TIM5);
}
TIM_Cmd(TIM5,DISABLE);
}

void TIM5_MS_CALC(uint32_t ms)
{
u16 counter=(ms*25)&0xFFFF;
TIM_Cmd(TIM5,ENABLE);
TIM_SetCounter(TIM5,counter); //设置计数值

while(counter>1)
{
counter=TIM_GetCounter(TIM5);
}
TIM_Cmd(TIM5,DISABLE);
}

void TIM5_US_CALC(uint32_t us)
{
u16 counter=us&0xffff;
TIM_Cmd(TIM5,ENABLE);
TIM_SetCounter(TIM5,counter); //设置计数值

while(counter>1)
{
counter=TIM_GetCounter(TIM5);
}
TIM_Cmd(TIM5,DISABLE);
}

/*******************************************************************************
* Function Name : Delay
* Description : Inserts a delay time.
* Input : nTime: specifies the delay time length, in milliseconds.
* Output : None
* Return : None
*******************************************************************************/
void _delay_us(u32 nTime)
{
u16 counter=nTime&0xffff;
TIM_Cmd(TIM5,ENABLE);
TIM_SetCounter(TIM5,counter); //设置计数值

while(counter>1)
{
counter=TIM_GetCounter(TIM5);
}
TIM_Cmd(TIM5,DISABLE);
}

#define RomCodeLen 8
u8 RomCode[RomCodeLen];
u8 Oid[8],pagedata[8];

u32 A,B,C,D,E,F,G,H,I,J;

//IO输入输出配置
void GPIO_Conf_in(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//输入模式可能有问题
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void GPIO_Conf_out(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}

//-----------------------------------------------------------------------------
// Set the 1-Wire timing to 'standard' (standard=1) or 'overdrive' (standard=0).
//
void SetSpeed(int standard)
{
// Adjust tick values depending on speed
if (standard)
{
// Standard Speed
A = 6 ;
B = 64 ;
C = 60 ;
D = 10 ;
E = 9 ;
F = 55 ;
G = 0;
H = 480 ;
I = 70 ;
J = 410 ;
}
else
{
// Overdrive Speed
A = 2 ;
B = 8 ;
C = 8 ;
D = 3 ;
E = 1 ;
F = 7 ;
G = 3 ;
H = 70 ;
I = 9 ;
J = 40 ;
}
}

//-----------------------------------------------------------------------------
// Generate a 1-Wire reset, return 1 if no presence detect was found,
// return 0 otherwise.
// (NOTE: Does not handle alarm presence from DS2404/DS1994)
//
int OWTouchReset(void)
{
int result;
_delay_us(G);
GPIO_Conf_out();
GPIO_ResetBits(GPIOA,GPIO_Pin_12);// Drives DQ low
_delay_us(H);
GPIO_SetBits(GPIOA, GPIO_Pin_12);// Releases the bus
_delay_us(I);
GPIO_Conf_in();
result = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_12); // Sample for presence pulse from slave
_delay_us(J); // Complete the reset sequence recovery
return result; // Return sample presence pulse result
}

//-----------------------------------------------------------------------------
// Send a 1-Wire write bit. Provide 10us recovery time.
//
void OWWriteBit(int bit)
{
GPIO_Conf_out();
if (bit)
{
// Write '1' bit
GPIO_ResetBits(GPIOA,GPIO_Pin_12);// Drives DQ low
_delay_us(A);
GPIO_SetBits(GPIOA, GPIO_Pin_12);// Releases the bus
_delay_us(B); // Complete the time slot and 10us recovery
}
else
{
// Write '0' bit
GPIO_ResetBits(GPIOA,GPIO_Pin_12);// Drives DQ low
_delay_us(C);
GPIO_SetBits(GPIOA, GPIO_Pin_12);// Releases the bus
_delay_us(D);
}
}

//-----------------------------------------------------------------------------
// Read a bit from the 1-Wire bus and return it. Provide 10us recovery time.
//
int OWReadBit(void)
{
int result;
GPIO_Conf_out();
GPIO_ResetBits(GPIOA,GPIO_Pin_12);// Drives DQ low
_delay_us(A);
GPIO_SetBits(GPIOA, GPIO_Pin_12);// Releases the bus
_delay_us(E);
GPIO_Conf_in();
result = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_12)& 0x01;// Sample the bit value from the slave
_delay_us(F); // Complete the time slot and 10us recovery

return result;
}

//-----------------------------------------------------------------------------
// Write 1-Wire data byte
//
void OWWriteByte(int data)
{
int loop;

// Loop to write each bit in the byte, LS-bit first
for (loop = 0; loop < 8; loop++)
{
OWWriteBit(data & 0x01);

// shift the data byte for the next bit
data >>= 1;
}
}

//-----------------------------------------------------------------------------
// Read 1-Wire data byte and return it
//
int OWReadByte(void)
{
int loop, result=0;

for (loop = 0; loop < 8; loop++)
{
// shift the result to get it ready for the next bit
result >>= 1;

// if result is one, then set MS bit
if (OWReadBit())
result |= 0x80;
}
return result;
}

//-----------------------------------------------------------------------------
// Write a 1-Wire data byte and return the sampled result.
//
int OWTouchByte(int data)
{
int loop, result=0;

for (loop = 0; loop < 8; loop++)
{
// shift the result to get it ready for the next bit
result >>= 1;

// If sending a '1' then read a bit else write a '0'
if (data & 0x01)
{
if (OWReadBit())
result |= 0x80;
}
else
OWWriteBit(0);

// shift the data byte for the next bit
data >>= 1;
}
return result;
}

//-----------------------------------------------------------------------------
// Write a block 1-Wire data bytes and return the sampled result in the same
// buffer.
//
void OWBlock(unsigned char *data, int data_len)
{
int loop;

for (loop = 0; loop < data_len; loop++)
{
data[loop] = OWTouchByte(data[loop]);
}
}

///CRC校验
u8 dscrcCheck(u8* p,u8 len)
{
uint8_t bit0,cbit,i,j,byte,temp;

temp=0;
for(j=0;j<len;j++)
{
byte=p[j];
for(i=0;i<8;i++)
{
cbit = temp & 0x01;
bit0 = byte & 0x01;

temp=temp>>1;

if( (cbit^bit0) ) temp^=0x8c;

byte>>=1;
}
}
return temp;
}

//read 2431认证码
u8 read_2431(void)
{
int i;

// set the speed to 'standard'
SetSpeed(1);

// select the device
if (OWTouchReset()) // Reset the 1-Wire bus
return 0; // Return if no devices found
OWWriteByte(0x33); // Send Read ROM command to select single device
// read the page data
_delay_us(60);
for (i = 0; i < 8; i++)
RomCode[i] = OWReadByte();
if ( dscrcCheck(RomCode,8) )
{
return 0;
}
else
{
return 1;
}
}

/
void read_2431_pagedata(unsigned char page, unsigned char *page_data)
{
unsigned char i;
// set the speed to 'standard'
SetSpeed(1);

// select the device
if (OWTouchReset()) // Reset the 1-Wire bus
{
return ; // Return if no devices found
}

OWWriteByte(0xCC); // Send Skip ROM command to select single device
OWWriteByte(0xf0); // Read Authentication command
OWWriteByte((page << 5) & 0xFF); // TA1
OWWriteByte(0); // TA2 (always zero for DS2432)

_delay_us(100);

// read the page data
for (i = 0; i < 8; i++)
page_data[i] = OWReadByte();

if (OWTouchReset()) // Reset the 1-Wire bus
{
return ; // Return if no devices found
}
}

void write_2431_pagedata(unsigned char page, unsigned char *page_data)
{
unsigned char i,TA1,TA2,E_S;
unsigned char rstatus[8];

// set the speed to 'standard'
SetSpeed(1);

// select the device
if (OWTouchReset()) // Reset the 1-Wire bus
{
return ; // Return if no devices found
}

OWWriteByte(0xCC); // Send Skip ROM command to select single device
OWWriteByte(0x0F); // Read Authentication command
//OWWriteByte((page << 5) & 0xFF);
OWWriteByte(0x20);
OWWriteByte(0x00);

// read the page data
for (i = 0; i < 8; i++)
{
OWWriteByte(page_data[i]);
}
//crc
rstatus[0] = OWReadByte();
rstatus[1] = OWReadByte();

_delay_us(200);

// select the device
if (OWTouchReset()) // Reset the 1-Wire bus
{
return; // Return if no devices found
}
OWWriteByte(0xCC); // Send Skip ROM command to select single device
OWWriteByte(0xAA);
TA1 = OWReadByte();
TA2 = OWReadByte();
E_S = OWReadByte();

_delay_us(10);
for(i=0;i<8;i++)
{
// rdtmp = OWReadByte();
Oid[i]=OWReadByte();
}
//crc
rstatus[2] = OWReadByte();
rstatus[3] = OWReadByte();

// select the device
if (OWTouchReset()) // Reset the 1-Wire bus
{
return ; // Return if no devices found
}
OWWriteByte(0xCC); // Send Skip ROM command to select single device
OWWriteByte(0x55); // Read Authentication command
//OWWriteByte((page << 5) & 0xFF); // TA1
OWWriteByte(0x20);
OWWriteByte(0x00); // TA2 (always zero for DS2432)
OWWriteByte(0x07);

_delay_us(15000); //延时很重要
//Wait tPROGMAX for the copy function to complete
rstatus[4] = OWReadByte();

Oid[2]=TA1;
Oid[3]=TA2;
Oid[0]=E_S;
Oid[4]=rstatus[4];

}

void main(void)
System_Configuration();
TIM5_Init_Query(CALC_TYPE_US);
for(int i=0;i<8;i++) pagedata[i] = 0x40+i;
write_2431_pagedata(1, pagedata);
for(int i=0;i<8;i++) pagedata[i] = 0x00;
read_2431_pagedata(1, pagedata);
while(1);

stm32读写 DS2431相关推荐

STM32读写内部flash
概念:计算机中最小的信息单位是bit,也就是一个二进制位,8个bit组成一个Byte,也就是1个字节, 1个存储单元存放1个字节,每个存储单元对应一个32位(bit)地址,所以重要的话说三遍:对于32 ...
STM32读写内部Flash（介绍+附代码）
概述内部flash读写详解一.介绍首先我们需要了解一个内存映射: stm32的flash地址起始于0x0800 0000,结束地址是0x0800 0000加上芯片实际的flash大小,不同的芯片 ...
FPGA配置芯片EPCS读写操作--STM32读写
注意事项: (1)首先STM32需要设置nCE和nConfig信号,即nCE置高,nConfig拉低,获得EPCS的控制权,而后对EPCS操作,操作完成后需要释放这两个管脚,即nCE拉低,nConfi ...
STM32读写W25Q
文章目录硬件外观引脚说明代码摘要代码获取硬件外观引脚说明关于如何接线? 1,CS 2,MISO 3,3.3V 4,GND 5,MOSI 6,SCK 7,3.3V 8,3.3V 关于如何查 ...
STM32读写保护详细解锁指南
前段时间,在淘宝买了几片stm32f429vet6,某猫价格由高到低排序,选了最便宜的,结果踩到了坑. 写着所谓的进口散装,价格比市价便宜一半.当焊到板子上,用swd仿真,有趣的事情发生了,在设置好各 ...
关于STM32读写flash内容时进入Hardfault的问题
读写flash时尤其要注意地址的问题. 1,不能将内容写入flash已下载的程序的相同地址,尽可能的将地址设置的靠后: 2,注意不同容量flash的大小,读写地址不要超出flash主存储块的最大地址, ...
STM32读写24C02遇到的问题
这几天在弄I2C,读取24C02的数据.我默默的敲完了代码,然后仿真. 代码就下面两行,就是写一个字节,然后读取. I2C_EE_BufferWrite( &write,100, 1); I2 ...
STM32内部flash详解（1）
STM32 内部FLAsh概述今天说一下STM32中的内部flash. 当我们把写好的代码下载MCU中,这个代码时存放在flash中的.当芯片重启复位上电后,会通过内核对flash进行代码的加载运行 ...
STM32 Flash 永久用户数据空间
/********************************************************************************* * ...

stm32读写 DS2431

stm32读写 DS2431相关推荐

最新文章

热门文章