终于搞定了STM32读写DS2431

STM32

终于搞定了STM32读写DS2431

2019-12-10 18:12发布

站内问答 / STM32/STM8

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//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);