400 lines
9.6 KiB
C
400 lines
9.6 KiB
C
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#include "MYI2C.h"
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MYI2C_Struct SENx;
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/**********************************************
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//MYI2C_Delay_us
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**********************************************/
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void MYI2C_Delay_us(unsigned long nTim)
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{
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unsigned int i;
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while(nTim--)
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{
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i=MYI2C_delay_us_cnt;
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while(i--);
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}
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}
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/*******************************************************************************
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* Function Name : MYI2C_GPIO_MODE
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* Description : Configures the different GPIO ports.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void MYI2C_GPIO_MODE(unsigned char TYP) //<2F><><EFBFBD><EFBFBD>MCU<43><EFBFBD><DEB8><EFBFBD>Ӧ<EFBFBD><D3A6>IO<49><4F>ʼ<EFBFBD><CABC>
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{
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#ifdef ARM32
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GPIO_InitTypeDef GPIO_InitStruct;
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#endif
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switch(TYP)
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{
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case SDA_OUT://<2F><><EFBFBD>ÿ<EFBFBD>©<EFBFBD><C2A9><EFBFBD><EFBFBD>,<2C><>Ҫ<EFBFBD><D2AA><EFBFBD>ⲿ<EFBFBD><E2B2BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#ifdef ARM32
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GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_OD;
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GPIO_InitStruct.GPIO_Pin =SDA_Pin;
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GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(IIC_SDA_PORT, &GPIO_InitStruct);
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#else
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P0M0 |= 1<<3; P0M1 |= 3<<2;
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#endif
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break;
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case SDA_IN://<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<2C><>Ҫ<EFBFBD><D2AA><EFBFBD>ⲿ<EFBFBD><E2B2BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#ifdef ARM32
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GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU;
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GPIO_InitStruct.GPIO_Pin =SDA_Pin;
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GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(IIC_SDA_PORT, &GPIO_InitStruct);
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#else
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P0M0 &= ~(1<<3); P0M1 |= 3<<2;
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#endif
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break;
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case SCL_OUT://<2F><><EFBFBD>ÿ<EFBFBD>©<EFBFBD><C2A9><EFBFBD><EFBFBD>,<2C><>Ҫ<EFBFBD><D2AA><EFBFBD>ⲿ<EFBFBD><E2B2BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#ifdef ARM32
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GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_OD;
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GPIO_InitStruct.GPIO_Pin =SCL_Pin;
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GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(IIC_SCL_PORT, &GPIO_InitStruct);
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#else
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P0M0 |= 1<<2; P0M1 |= 3<<2;
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#endif
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break;
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}
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}
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/*******************************************************************************
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* Function Name : MYI2C_GPIO_DATA
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* Description : Configures the different GPIO ports.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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unsigned char MYI2C_GPIO_DATA(unsigned char TYP)//<2F><><EFBFBD><EFBFBD>MCU<43><EFBFBD><DEB8><EFBFBD>Ӧ<EFBFBD><D3A6>IO<49><4F><EFBFBD><EFBFBD>
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{
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unsigned int dat=0;
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switch(TYP)
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{
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case SDA_H:
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#ifdef ARM32
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GPIO_SetBits(IIC_SDA_PORT,SDA_Pin);
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#else
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I2C_SDA_PIN = 1;
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#endif
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break;
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case SDA_L:
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#ifdef ARM32
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GPIO_ResetBits(IIC_SDA_PORT,SDA_Pin);
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#else
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I2C_SDA_PIN = 0;
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#endif
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break;
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case SCL_H:
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#ifdef ARM32
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GPIO_SetBits(IIC_SCL_PORT,SCL_Pin);
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#else
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I2C_SCL_PIN = 1;
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#endif
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break;
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case SCL_L:
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#ifdef ARM32
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GPIO_ResetBits(IIC_SCL_PORT,SCL_Pin);
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#else
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I2C_SCL_PIN = 0;
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#endif
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break;
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case SDA_R:
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#ifdef ARM32
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dat=GPIO_ReadInputDataBit(IIC_SDA_PORT,SDA_Pin);
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#else
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dat=I2C_SDA_PIN;
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#endif
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break;
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}
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return dat;
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}
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/**********************************************
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//IIC Start
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**********************************************/
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void MYI2C_IIC_Start(void)
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{
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MYI2C_SCK_Set();
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MYI2C_SDA_Set();
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MYI2C_SDA_Clr();
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MYI2C_SCK_Clr();
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}
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/**********************************************
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//IIC Stop
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**********************************************/
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void MYI2C_IIC_Stop(void)
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{
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MYI2C_SCK_Clr();
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MYI2C_SDA_Clr();
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MYI2C_SCK_Set();
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MYI2C_SDA_Set();
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}
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/**********************************************
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//IIC Ack
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**********************************************/
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void MYI2C_IIC_Ack(unsigned char ack)
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{
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MYI2C_SCK_Clr();
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if(ack)
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{
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MYI2C_SDA_Clr();
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}
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else
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{
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MYI2C_SDA_Set();
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}
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MYI2C_SCK_Set();
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}
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/**********************************************
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//IIC Wait_Ack
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**********************************************/
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unsigned char MYI2C_IIC_Wait_Ack(unsigned int wait_time)
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{
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MYI2C_SCK_Clr();
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MYI2C_SDA_IN_Mode;
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MYI2C_SDA_Set();
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MYI2C_SCK_Set();
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while(wait_time)
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{
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if(MYI2C_GPIO_DATA(SDA_R)==0)break;
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MYI2C_Delay_us(1);
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wait_time--;//=======================
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}
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MYI2C_SDA_OD_Mode;
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return wait_time;//<2F>Ƿ<EFBFBD>Ӧ<EFBFBD><D3A6>=======================
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}
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/**********************************************
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// IIC Write byte
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**********************************************/
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void MYI2C_Write_IIC_Byte(unsigned char dat)
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{
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unsigned char i;
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for(i=0;i<8;i++)
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{
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MYI2C_SCK_Clr();
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if(dat&0x80)
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{
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MYI2C_SDA_Set();
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}
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else
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{
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MYI2C_SDA_Clr();
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}
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MYI2C_SCK_Set();
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dat=dat<<1;
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}
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}
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/**********************************************
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// IIC Read byte
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**********************************************/
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unsigned char MYI2C_Read_IIC_Byte(void)
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{
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unsigned char i,byt=0;
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MYI2C_SCK_Clr();
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MYI2C_SDA_IN_Mode;
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MYI2C_SDA_Set();
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for(i=0;i<8;i++)
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{
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MYI2C_SCK_Clr();
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if(MYI2C_GPIO_DATA(SDA_R))byt++;
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MYI2C_SCK_Set();
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if(i<7)byt=byt<<1;
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}
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MYI2C_SDA_OD_Mode;
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return byt;
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}
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/*******************************************************************************
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* Function Name : MYI2C_Init
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* Description : <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>MYI2C
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* Input : None
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* Output : None
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* Return :None
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*******************************************************************************/
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void MYI2C_Init(MYI2C_Struct *pst,unsigned int ReadTimMS,unsigned char xAddr)
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{
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pst->Adrr=xAddr;
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pst->Step=SENSOR_IDLE;
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if(ReadTimMS>MinReadTim)pst->SetRTim=ReadTimMS;
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else pst->SetRTim=MinReadTim;
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MYI2C_SCK_OD_Mode;
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MYI2C_SDA_OD_Mode;
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MYI2C_SCK_Set();
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MYI2C_SDA_Set();
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}
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/*******************************************************************************
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* Function Name :
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* Description :
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* Input :None
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* Output :None
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* Return :None
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*******************************************************************************/
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unsigned char MYI2C_READ_FUNC(MYI2C_Struct *pst,unsigned char device_addr,unsigned char register_addr,unsigned char *pDat,unsigned char len)
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{
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unsigned char NoAck=0;
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if(register_addr)
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{
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/* Send STRAT condition a second time */
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MYI2C_IIC_Start();
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/* Send slave address for Write Regsiter */
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MYI2C_Write_IIC_Byte((device_addr<<1) + 0);
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/* Ack */
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if(MYI2C_IIC_Wait_Ack(Wait_Ack_time)==0)NoAck++;
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/*Send register_addr*/
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MYI2C_Write_IIC_Byte((register_addr));
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/* Ack */
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if(MYI2C_IIC_Wait_Ack(Wait_Ack_time)==0)NoAck++;
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// MYI2C_IIC_Stop(pst);
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MYI2C_SCK_Clr();
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MYI2C_SCK_Set();
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}
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/* Send STRAT condition a second time */
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MYI2C_IIC_Start();
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/* Send slave address for Read */
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MYI2C_Write_IIC_Byte((device_addr<<1)+1 );
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/* Ack */
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if(MYI2C_IIC_Wait_Ack(Wait_Ack_time)==0)NoAck++;
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/* While there is data to be read */
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while(len && NoAck==0 && len<MYI2C_Buffer_Size) //
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{
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*pDat=MYI2C_Read_IIC_Byte();
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/* Ack */
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MYI2C_IIC_Ack(len-1);//len = 1 NoAck
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pDat++;
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len--;
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}
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/* Send STOP Condition */
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MYI2C_IIC_Stop();
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pst->ErrFlag=NoAck;
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return NoAck;
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}
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/*******************************************************************************
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* Function Name :
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* Description :
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* Input : None
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* Output : None
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* Return :None
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*******************************************************************************/
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unsigned char MYI2C_WRITE_FUNC(MYI2C_Struct *pst,unsigned char device_addr,unsigned char register_addr,unsigned char *pDat,unsigned char len)
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{
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unsigned int NoAck=0;
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/* Send STRAT condition */
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MYI2C_IIC_Start();
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/* Send slave address for write */
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MYI2C_Write_IIC_Byte((device_addr<<1) + 0);
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/* ACK */
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if(MYI2C_IIC_Wait_Ack(Wait_Ack_time)==0)NoAck++;
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/* Send register_addr for read */
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MYI2C_Write_IIC_Byte((register_addr));
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/* ACK */
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if(MYI2C_IIC_Wait_Ack(Wait_Ack_time)==0)NoAck++;
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while(NoAck==0 && len && len<MYI2C_Buffer_Size)//
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{
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/* Send the byte to be written */
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MYI2C_Write_IIC_Byte(*pDat);
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/* Acknowledgement */
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MYI2C_IIC_Wait_Ack(Wait_Ack_time);
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pDat++;
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len--;
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}
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/* Send STOP condition */
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MYI2C_IIC_Stop();
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pst->ErrFlag=NoAck;
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return NoAck;
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}
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/*******************************************************************************
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* Function Name : CheckCrc
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* Description :
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* Input : None
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* Output : None
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* Return :None
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*******************************************************************************/
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unsigned char CheckCrc8(unsigned char *pDat,unsigned char Lenth)
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{
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unsigned char crc = 0xff, i, j;
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for (i = 0; i < Lenth ; i++)
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{
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crc = crc ^ *pDat;
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for (j = 0; j < 8; j++)
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{
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if (crc & 0x80) crc = (crc << 1) ^ 0x31;
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else crc <<= 1;
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}
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pDat++;
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}
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return crc;
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}
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/*******************************************************************************
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* Function Name :
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* Description :
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* Input :None
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|
* Output :None
|
|||
|
|
* Return :None
|
|||
|
|
*******************************************************************************/
|
|||
|
|
void MYI2C_Handle(MYI2C_Struct *pst)
|
|||
|
|
{
|
|||
|
|
unsigned char i;
|
|||
|
|
unsigned long s32x;
|
|||
|
|
|
|||
|
|
pst->timcnt+=MYI2C_Tick;
|
|||
|
|
if(pst->timcnt>PowerOnTim && pst->Step==SENSOR_IDLE)
|
|||
|
|
{
|
|||
|
|
pst->Step=SENSOR_MEASURE;
|
|||
|
|
pst->SendByte[0]=0x33;
|
|||
|
|
pst->SendByte[1]=0x00;
|
|||
|
|
MYI2C_WRITE_FUNC(pst,pst->Adrr,0xAC, &pst->SendByte[0], 2);
|
|||
|
|
}
|
|||
|
|
else if(pst->timcnt>MeasureTim && pst->Step==SENSOR_MEASURE)
|
|||
|
|
{
|
|||
|
|
pst->Step=SENSOR_COMPLETE;
|
|||
|
|
MYI2C_READ_FUNC(pst,pst->Adrr,0, &pst->ReadByte[0], 7);
|
|||
|
|
if(pst->ErrFlag==0)
|
|||
|
|
{
|
|||
|
|
if((CheckCrc8(&pst->ReadByte[0],6)==pst->ReadByte[6])&&((pst->ReadByte[0]&0x98) == 0x18))
|
|||
|
|
{
|
|||
|
|
s32x=pst->ReadByte[1];s32x=s32x<<8;s32x+=pst->ReadByte[2];s32x=s32x<<8;s32x+=pst->ReadByte[3];s32x=s32x>>4;
|
|||
|
|
pst->RH=s32x;
|
|||
|
|
pst->RH=pst->RH*100/1048576;
|
|||
|
|
s32x=pst->ReadByte[3]&0x0F;s32x=s32x<<8;s32x+=pst->ReadByte[4];s32x=s32x<<8;s32x+=pst->ReadByte[5];
|
|||
|
|
pst->T=s32x;
|
|||
|
|
pst->T=pst->T*200/1048576-50;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
pst->RH=0;
|
|||
|
|
pst->T=0;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
else if(pst->timcnt>pst->SetRTim)
|
|||
|
|
{
|
|||
|
|
pst->Step=SENSOR_IDLE;
|
|||
|
|
pst->timcnt=0;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|