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HAL_Project/Project -APP-V1.0/Hardware/IIC/iic.c

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Porject_1.0
2025-05-09 15:43:42 +08:00
#include "main.h" //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA>ͷ<EFBFBD>ļ<EFBFBD>
/*-------------------------------------------------*/
/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>IIC<49>ӿ<EFBFBD> */
/*<2A><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/*<2A><><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD> */
/*-------------------------------------------------*/
void iicInit(void) {
GPIO_InitTypeDef GPIO_InitStruct; //<2F><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>GPIO<49>ı<EFBFBD><C4B1><EFBFBD>
GPIOC_RCC_ENABLE;
GPIO_InitStruct.Pin = SDA_Pin; //<2F><><EFBFBD><EFBFBD>SDA<44><41>Ӧ<EFBFBD><D3A6>IO<49><4F>
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD; //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; //<2F><><EFBFBD><EFBFBD>
HAL_GPIO_Init(SDA_GPIO_Port, &GPIO_InitStruct); //<2F><><EFBFBD><EFBFBD>
GPIO_InitStruct.Pin = SCL_Pin; //<2F><><EFBFBD><EFBFBD>SCL<43><4C>Ӧ<EFBFBD><D3A6>IO<49><4F>
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; //<2F><><EFBFBD><EFBFBD>
HAL_GPIO_Init(SCL_GPIO_Port, &GPIO_InitStruct); //<2F><><EFBFBD><EFBFBD>
IIC_SCL_H; //SCL<43><4C><EFBFBD><EFBFBD>
IIC_SDA_H; //SDA<44><41><EFBFBD><EFBFBD>
}
/*-------------------------------------------------*/
/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IIC<49><43>ʼ<EFBFBD>ź<EFBFBD> */
/*<2A><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/*<2A><><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD> */
/*-------------------------------------------------*/
void iicStart(void) {
IIC_SDA_H; //SDA<44><41><EFBFBD><EFBFBD>
IIC_SCL_H; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(4); //<2F><>ʱ
IIC_SDA_L; //SCL<43>ߵ<EFBFBD>ƽ<EFBFBD><C6BD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>SDA<44>ɸߵ<C9B8><DFB5>ͣ<EFBFBD><CDA3><EFBFBD>ʼ<EFBFBD>ź<EFBFBD>
}
/*-------------------------------------------------*/
/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IICֹͣ<CDA3>ź<EFBFBD> */
/*<2A><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/*<2A><><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD> */
/*-------------------------------------------------*/
void iicStop(void) {
IIC_SDA_L; //SDA<44><41><EFBFBD><EFBFBD>
IIC_SCL_H; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(4); //<2F><>ʱ
IIC_SDA_H; //SCL<43>ߵ<EFBFBD>ƽ<EFBFBD><C6BD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>SDA<44>ɵ͵<C9B5><CDB5>ߣ<EFBFBD><DFA3><EFBFBD><EFBFBD><EFBFBD>ֹͣ<CDA3>ź<EFBFBD>
}
/*-------------------------------------------------*/
/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȴ<EFBFBD>Ӧ<EFBFBD><D3A6> */
/*<2A><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/*<2A><><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>0<EFBFBD><30><EFBFBD>ɹ<EFBFBD> 1<><31>ʧ<EFBFBD><CAA7> */
/*-------------------------------------------------*/
char iicWaitAck(void) {
unsigned char timeout=0; //<2F><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD><DABC>㳬ʱʱ<CAB1><CAB1>
IIC_SDA_H; //SDA<44><41><EFBFBD><EFBFBD>
IIC_SCL_H; //SCL<43><4C><EFBFBD><EFBFBD>
while(READ_SDA) { //<2F>ȴ<EFBFBD>SDA<44><41><EFBFBD>͵<EFBFBD>ƽ<EFBFBD><C6BD><EFBFBD><EFBFBD>ʾӦ<CABE><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼһֱwhileѭ<65><D1AD><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1><EFBFBD><EFBFBD>ʱ
timeout++; //<2F><>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>+1
if(timeout>250) { //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>250
iicStop(); //<2F><><EFBFBD><EFBFBD>ֹͣ<CDA3>ź<EFBFBD>
return 1; //<2F><><EFBFBD><EFBFBD>1<EFBFBD><31><EFBFBD><EFBFBD>ʾʧ<CABE><CAA7>
}
delayUs(2); //<2F><>ʱ
}
IIC_SCL_L; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(20); //<2F><>ʱ
return 0; //<2F><><EFBFBD><EFBFBD>0<EFBFBD><30><EFBFBD><EFBFBD>ʾ<EFBFBD>ɹ<EFBFBD>
}
/*-------------------------------------------------*/
/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ֽ<EFBFBD> */
/*<2A><> <20><><EFBFBD><EFBFBD>txd<78><64><EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD><CDB5>ֽ<EFBFBD> */
/*<2A><><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD> */
/*-------------------------------------------------*/
void iicSendByte(uint8_t txd) {
unsigned char t; //<2F><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>forѭ<72><D1AD>
IIC_SCL_L; //SCL<43><4C><EFBFBD>ͣ<EFBFBD><CDA3><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD>ݴ<EFBFBD><DDB4><EFBFBD>
for(t=0; t<8; t++) { //forѭ<72><D1AD><EFBFBD><EFBFBD>һλһλ<D2BB>ķ<EFBFBD><C4B7>ͣ<EFBFBD><CDA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ λ7<CEBB><37>ʼ
IIC_SDA_OUT(((txd&0x80)>>7)); //<2F><>SDA<44><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
txd<<=1; //<2F><><EFBFBD><EFBFBD>һλ<D2BB><CEBB>׼<EFBFBD><D7BC><EFBFBD><EFBFBD>һ<EFBFBD>η<EFBFBD><CEB7><EFBFBD>
delayUs(2); //<2F><>ʱ
IIC_SCL_H; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(2); //<2F><>ʱ
IIC_SCL_L; //SCL<43><4C><EFBFBD><EFBFBD>
}
}
/*-------------------------------------------------*/
/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡһ<C8A1><D2BB><EFBFBD>ֽ<EFBFBD> */
/*<2A><> <20><><EFBFBD><EFBFBD>ack<63><6B><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6> 1:<3A><> 0<><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/*<2A><><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/*-------------------------------------------------*/
unsigned char iicReadByte(uint8_t ack) {
unsigned char i; //<2F><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>forѭ<72><D1AD>
unsigned char receive; //<2F><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><DAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
receive = 0; //<2F><><EFBFBD><EFBFBD>receive<76><65>׼<EFBFBD><D7BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
IIC_SCL_L; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(20); //<2F><>ʱ
for(i=0; i<8; i++) { //forѭ<72><D1AD><EFBFBD><EFBFBD>һλһλ<D2BB>Ķ<EFBFBD>ȡ
IIC_SCL_H; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(20); //<2F><>ʱ
receive<<=1; //<2F><><EFBFBD><EFBFBD>һλ<D2BB><CEBB>׼<EFBFBD><D7BC><EFBFBD>´εĶ<CEB5>ȡ
if(READ_SDA)receive++; //<2F><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
delayUs(20); //<2F><>ʱ
IIC_SCL_L; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(20); //<2F><>ʱ
}
if(!ack) { //<2F><><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>
IIC_SDA_H; //ʱ<><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸߵ<C4B8>ƽ<EFBFBD>ڼ䱣<DABC><E4B1A3><EFBFBD>ȶ<EFBFBD><C8B6>ĸߵ<C4B8>ƽ
IIC_SCL_H; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(2); //<2F><>ʱ
IIC_SCL_L; //SCL<43><4C><EFBFBD><EFBFBD>
} else { //<2F><>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>
IIC_SDA_L; //ʱ<><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸߵ<C4B8>ƽ<EFBFBD>ڼ䱣<DABC><E4B1A3><EFBFBD>ȶ<EFBFBD><C8B6>ĵ͵<C4B5>ƽ
IIC_SCL_H; //SCL<43><4C><EFBFBD><EFBFBD>
delayUs(2); //<2F><>ʱ
IIC_SCL_L; //SCL<43><4C><EFBFBD><EFBFBD>
IIC_SDA_H; //SDA<44><41><EFBFBD><EFBFBD>
}
return receive;
}