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 李外
完成USB移植，测试正常，
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#include "HW_MCUIO.h"//#include "stm32f4xx_hal.h"
#include "platform.h"
#include "function.h"
#define I2C_PORT GPIOB
#define I2C_SCK GPIO_PIN_8// GPIO_PIN_6
#define I2C_SDA GPIO_PIN_9// GPIO_PIN_7
/*
This i2c driver from stm32F1xx; we should add delay when operation io,
because the stm32F4 much fast (The main frequency of stm32F4xx is 168M) !!
F4系列速度太快，需要加延时，读写才正常!!!*/
static void i2c_delay(unsigned short dy)
{
unsigned short i;
for(i=0;i<dy;i++);
}
#define I2C_IO_DY 5//1//
#define SDA_1 {HW_GPIO_SetPin(I2C_PORT, I2C_SDA);i2c_delay(I2C_IO_DY);}
#define SDA_0 {HW_GPIO_ResetPin(I2C_PORT, I2C_SDA);i2c_delay(I2C_IO_DY);}
#define SCK_1 {HW_GPIO_SetPin(I2C_PORT, I2C_SCK);i2c_delay(I2C_IO_DY);}
#define SCK_0 {HW_GPIO_ResetPin(I2C_PORT, I2C_SCK);i2c_delay(I2C_IO_DY);}
#define READ_SDA HW_GPIO_ReadPin(I2C_PORT, I2C_SDA)
void i2c_init( void )
{
HW_GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = I2C_SDA |I2C_SCK;
GPIO_InitStruct.Mode = HW_GPIO_MODE_OUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = HW_GPIO_SPEED_HIGH;
HW_GPIO_Init(I2C_PORT, &GPIO_InitStruct);
}
void SET_SDA_IN(void){
HW_GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = I2C_SDA;
GPIO_InitStruct.Mode = HW_GPIO_MODE_IPU;//GPIO_MODE_OUTPUT_PP
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = HW_GPIO_SPEED_HIGH;
HW_GPIO_Init(I2C_PORT, &GPIO_InitStruct);
}
void SET_SDA_OUT(void){
HW_GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = I2C_SDA;
GPIO_InitStruct.Mode = HW_GPIO_MODE_OUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;//GPIO_NOPULL;
GPIO_InitStruct.Speed = HW_GPIO_SPEED_HIGH;
HW_GPIO_Init(I2C_PORT, &GPIO_InitStruct);
}
void i2c_start(void)
{
SDA_1
SCK_1
SDA_0
SCK_0
}
void i2c_stop(void)
{
SDA_0
SCK_1
SDA_1
SCK_0
}
unsigned char i2c_send_byte(unsigned char byt)
{
unsigned char i;
SET_SDA_OUT();
for(i=0;i<8;i++){
if((byt<<i)&0x80) SDA_1
else SDA_0
SCK_1
SCK_0
}//for
//2,
SET_SDA_IN();
SCK_1
for(i=0;i<100;i++){
if(READ_SDA==0){
SCK_0
SET_SDA_OUT();
return 1;//ok
}
}//for
SCK_0
SET_SDA_OUT();
return 0; //fail
}
unsigned char i2c_read_byte(void)
{
unsigned char i;
unsigned char byt=0;
SET_SDA_IN();
for(i=0;i<8;i++){
byt <<=1;
SCK_1
if(READ_SDA) byt |=1;
SCK_0;
}//for
SET_SDA_OUT();
SDA_0//must
SCK_1
SCK_0
return byt;
}
#define EE_PAGE_SIZE 32
//---------------------------------- E2prom application --------------------------------------------
void EE_WriteBytes(unsigned int addr,const unsigned char *pdata,unsigned char len)
{
#if 0
unsigned char i;
i2c_start();
i2c_send_byte(0xA0);
i2c_send_byte(addr>>8);
i2c_send_byte(addr);
for(i=0;i<len;i++){
i2c_send_byte(pdata[i]);
}
i2c_stop();
//return 1;
basic_delay_ms(10);// delay_Nms(10);//HAL_Delay(10);//多次写入时必须延时!!
#else
unsigned char i;
unsigned char cur_len;
unsigned char offset=0;
// unsigned char remain_len;
// unsigned int cur_addr;
do{
//cur_addr = addr+offset;
//remain_len = len-offset;
//当前page可写入的字节个数;
if( (cur_len = EE_PAGE_SIZE - ( (addr+offset)%EE_PAGE_SIZE) ) >= (len-offset) ){
cur_len = len-offset;
}
else{
cur_len = cur_len;
}
i2c_start();
i2c_send_byte(0xA0);
i2c_send_byte((addr+offset)>>8);
i2c_send_byte(addr+offset);
for(i=0;i<cur_len;i++){
i2c_send_byte(pdata[offset+i]);
}
i2c_stop();
//return 1;
basic_delay_ms(10);// delay_Nms(10);//HAL_Delay(10);//多次写入时必须延时!!
offset +=cur_len;
if(offset >=len) break;
}while(1);
#endif
}
/*
*/
unsigned char EE_ReadBytes(unsigned int addr,unsigned char *pdata,unsigned char len)
{
unsigned char i;
i2c_start();
i2c_send_byte(0xA0);//write
i2c_send_byte(addr>>8);
i2c_send_byte(addr);
i2c_start();
i2c_send_byte(0xA1);//read
for(i=0;i<len;i++)
pdata[i]=i2c_read_byte();
i2c_stop();
return 1;
}
void i2c_test_basic(void)
{
unsigned char tmp[2]= {0xaa,0};
EE_WriteBytes(0xff,tmp,1);
EE_ReadBytes(0xff,tmp+1,1);
if( tmp[1] !=tmp[0]){
tmp[1] =tmp[1];
}
else{
tmp[1] =tmp[1];
}
}
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