我改下，100% OK，
#include "i2c_master.h"
#define SCL_H I2C1_SCL_Write(1)
#define SCL_L I2C1_SCL_Write(0)
#define SDA_H I2C1_SDA_Write(1)
#define SDA_L I2C1_SDA_Write(0)
#define I2C_SDA_READ I2C1_SDA_Read()
#define IO_DELAY 3
#define IO_DELAY_2X 4
#define IO_DELAY_3X 8
#define IO_DELAY_4X 10
#define IO_DELAY_5X 12
#define SDA_INPUT() SDA_H
uint8_t IC7211_WriteI2C_Byte(uint8_t reg,uint8_t data)
{
return i2c_write_byte(IC7211_I2C_ADDR,reg,&data,1);
}
uint8_t IC7211_WriteI2C_NByte(uint8_t reg,uint8_t data,uint8_t size)
{
return i2c_write_byte(IC7211_I2C_ADDR,reg,&data,size);
}
uint8_t IC7211_ReadI2C_Byte(uint8_t reg)
{
uint8_t data;
i2c_read_byte(IC7211_I2C_ADDR,reg,&data,1);
return data;
}
uint8_t IC7211_ReadI2C_NByte(uint8_t reg,uint8_t *buffer, uint32_t size)
{
i2c_read_byte(IC7211_I2C_ADDR,reg, buffer, size);
return 1;
}
uint8_t ic7211_check_id(void)
{
uint32_t nChipID;
uint32_t fw_byte_count;
char output[50];
uint8_t buffer[2]={0x0};
uint32_t ID;
IC7211_WriteI2C_Byte(0xFF, 0x80);
IC7211_WriteI2C_Byte(0xEE, 0x01);//IIC Enable
IC7211_WriteI2C_Byte(0xff, 0xa0);
// uint8_t bA000 = IC7211_ReadI2C_Byte(0x00);
// uint8_t bA001 = IC7211_ReadI2C_Byte(0x01);
// nChipID = ((bA000 << 8) | bA001);
IC7211_ReadI2C_NByte(0x00,buffer,2);
memset(output,0,sizeof(output));
sprintf(output, "\r\n ChipID=0x%x|buffer=0x%x 0x%x|ID=0x%x \r\n", nChipID,buffer[0],buffer[1],(buffer[0]<<8)|buffer[1]);
UART_UartPutString((const char*)output);
return nChipID == 0x1605;
}
static void start_i2c(void)
{
SDA_H;
CyDelayUs(IO_DELAY);
SCL_H;
CyDelayUs(IO_DELAY_5X);
SDA_L;
CyDelayUs(IO_DELAY_3X);
SCL_L;
CyDelayUs(IO_DELAY_2X);
}
static void stop_i2c(void)
{
SDA_L;
CyDelayUs(IO_DELAY);
SCL_H;
CyDelayUs(IO_DELAY_5X);
SDA_H;
CyDelayUs(IO_DELAY_2X);
}
static uint8_t read_ack(void) //接收应答信号函数
{
uint8_t ack; //定义一个位变量，来暂存应答状态。
SDA_INPUT();
CyDelayUs(IO_DELAY);
SCL_H; //拉高时钟线。
CyDelayUs(IO_DELAY);
ack = I2C_SDA_READ; //读取应答信号的状态。
CyDelayUs(IO_DELAY);
SCL_L; //拉低时钟线。
CyDelayUs(IO_DELAY);
return ack; //返回应答信号的状态，0表示应答，1表示非应答。
}
static uint8_t wait_read_ack(void)
{
if (!read_ack())
{
return 1;
}
return 0;
}
static uint8_t i2c_send_byte(uint8_t data)
{
uint8_t bit_cnt;
uint8_t size = 0;
for(bit_cnt = 0; bit_cnt < 8; bit_cnt++)
{
if((data<<bit_cnt) & 0x80)
SDA_H;
else
SDA_L;
CyDelayUs(IO_DELAY);
SCL_H;
CyDelayUs(IO_DELAY_2X);
SCL_L;
CyDelayUs(IO_DELAY);
}
//释放SDA总线，等待从设备应答
if(wait_read_ack() != 0)
size = 0;
else
size = 1;
return size;
}
static void ack_i2c(uint8_t a)
{
if(a == 0)
SDA_L;
else
SDA_H;
CyDelayUs(IO_DELAY);
SCL_H;
CyDelayUs(IO_DELAY_2X);
SCL_L;
CyDelayUs(IO_DELAY_2X);
}
static uint8_t recv_byte(void)
{
uint8_t retc = 0;
uint8_t bit_cnt;
//CyDelayUs(IO_DELAY_4X);
SDA_INPUT();
for (bit_cnt = 0; bit_cnt < 8; bit_cnt++)
{
SCL_H;
CyDelayUs(IO_DELAY);
retc = retc<<1;
if (I2C_SDA_READ != 0)
{
retc = retc | 0x1;
}
CyDelayUs(IO_DELAY);
SCL_L;
CyDelayUs(IO_DELAY);
}
//CyDelayUs(IO_DELAY_4X);
return retc;
}
uint8_t i2c_write_byte(uint8_t slave, uint8_t sub_addr, uint8_t *buffer, uint8_t len)
{
uint8_t i;
uint8_t size;
if(buffer == NULL || len == 0)
{
return 0;
}
start_i2c();
size = i2c_send_byte(slave);
if(size == 0)
{
stop_i2c();
return size;
}
size = i2c_send_byte(sub_addr);
if(size == 0)
{
stop_i2c();
return size;
}
for(i = 0; i < len; i++)
{
size = i2c_send_byte(*buffer);
if(size == 0)
{
stop_i2c();
return size;
}
buffer++;
}
stop_i2c();
return len;
}
uint8_t i2c_read_byte(uint8_t slave, uint8_t sub_addr, uint8_t *buffer, uint8_t len)
{
uint8_t i;
uint8_t size;
uint8_t output[50];
if(buffer == NULL || len == 0)
{
return 0;
}
start_i2c();
size = i2c_send_byte(slave);
if(size == 0)
{
stop_i2c();
*buffer = 0x00;
return size;
}
size = i2c_send_byte(sub_addr);
if (size == 0)
{
stop_i2c();
*buffer = 0x00;
return size;
}
start_i2c();
size = i2c_send_byte(slave+1);
if (size == 0)
{
stop_i2c();
*buffer = 0x00;
return size;
}
for (i = 0; i < len - 1; i++)
{
*buffer = recv_byte();
ack_i2c(0);
buffer++;
}
*buffer = recv_byte();
ack_i2c(1);
stop_i2c();
return len;
}
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