Blog – 백곡시스템

STM32F103RB – DS1302

출처: https://m.blog.naver.com/kiatwins/221124103717 CubeMX로 아두이노 D5~7번 3개의 핀을 출력으로 설정하고 프로젝트를 생성하고 아래 코드를 넣어주면 됩니다. 시간설정은 터미널에서 년월일시분초 12자를 입력하면 수신인터럽트로 처리해서 RTC 레지스터에 저장이 됩니다. stm32f1xxit.c에 있는 USART2_IRQHandler 함수는 지우거나 […]

Build Your Own CNC Controller

mariadb-10.6.16-winx64

HeidiSQL_12.6_32_Portable

inno script move existing directories/files

아래 코드는 복사 및 삭제입니다(원시 이동 또는 이름 바꾸기 대신). [Code]이 논리를 구현하려면 섹션을 사용하세요 . 지원되는 기능 과 처리할 수 있는 이벤트 에 대한 문서는 꽤 좋습니다. 설치 시작 시 대응 방법:


procedure CurStepChanged(CurStep: TSetupStep);
begin
  case CurStep of
    ssInstall:
    begin
      { will be executed just before the actual installation starts }
    end; 

    ssPostInstall:
    begin
      { will be executed just after the actual installation finishes }
    end; 
  end;
end;

procedure CurStepChanged(CurStep: TSetupStep);

begin

case CurStep of

ssInstall:

begin

{ will be executed just before the actual installation starts }

end;

ssPostInstall:

begin

{ will be executed just after the actual installation finishes }

end;

파일이 […]

NTC(10k) 수식

from: https://eroro.tistory.com/591 NTC의 특성 값이나 회로 부분은 변경하여 사용하여야 합니다.


#define REF_RESIST 10000
#define VREF 3.3f

/*******************************************************************************
* Function Name : 
* Parameters    : None
* Return        : None
* Description   : 
3.3 : 4096 = x : ADC
Vout= (x/(x+10000)) * 3.3

*******************************************************************************/
float Calculation_Vout(u16 a_nhADCValue, u8 a_chComp)
{
    float Vout, Resistor;

    a_nhADCValue += a_chComp;
    Vout = (a_nhADCValue * VREF);
    Vout /= 4095;
    // DEBUGPRINT("ADC Vout %f, ", Vout);
    Resistor = Vout *(REF_RESIST/(VREF-Vout));
    // DEBUGPRINT("Resistor %f\r\n", Resistor);

    return Resistor;
}

#define REF_LDTEMP_BETA 3477
#define REF_LDTEMP_BETA_REVERSE 0.000288 //1/REF_LDTEMP_BETA
#define REF_LDTEMP_25 298.15f
#define REF_LDTEMP_K 273.15f
#define REF_LDTEMP_UPPERRESIS 10000

/*******************************************************************************
* Function Name : 
* Description   : 
* Parameters    : None
* Return        : None
 0 Degree
Resistor = 10000*exp((REF_LDTEMP_BETA*((1/REF_LDTEMP_K)-(1/REF_LDTEMP_25))));
  Resistor = 290776.77 Ohm
*******************************************************************************/
u16 ADC_LDTemperature_Calc(u16 ADC_Batt, u8 ADC_Compensation)
{
    float Resistor, Celsius;

    Resistor = Calculation_Vout(ADC_Batt, 0);

    Celsius = (REF_LDTEMP_BETA_REVERSE*log(Resistor/REF_LDTEMP_UPPERRESIS));
    // DEBUGPRINT("Celsius %f\r\n", Celsius);
    Celsius += (1/REF_LDTEMP_25);
    // DEBUGPRINT("Celsius %f\r\n", Celsius);
    Celsius = pow(Celsius, -1);
    // DEBUGPRINT("Celsius %f\r\n", Celsius);
    Celsius -= 273.15f;
    // DEBUGPRINT("Celsius %f\r\n", Celsius);
    if(Celsius < 0)
    Celsius = 0;

    return (u16)Celsius;
}

#define REF_RESIST 10000

#define VREF 3.3f

/*******************************************************************************

* Function Name :

* Parameters : None

* Return : None

* Description :

3.3 : 4096 = x : ADC

Vout= (x/(x+10000)) * 3.3

*******************************************************************************/

float Calculation_Vout(u16 a_nhADCValue, u8 a_chComp)

{

float Vout, Resistor;

a_nhADCValue += a_chComp;

Vout = (a_nhADCValue * VREF);

Vout /= 4095;

// DEBUGPRINT("ADC Vout %f, ", Vout);

Resistor = Vout *(REF_RESIST/(VREF-Vout));

// DEBUGPRINT("Resistor %f\r\n", Resistor);

return Resistor;

}

#define REF_LDTEMP_BETA 3477

#define REF_LDTEMP_BETA_REVERSE 0.000288 //1/REF_LDTEMP_BETA

#define REF_LDTEMP_25 298.15f

#define REF_LDTEMP_K 273.15f

#define REF_LDTEMP_UPPERRESIS 10000

/*******************************************************************************

* Function Name :

* Description :

* Parameters : None

* Return : None

0 Degree

Resistor = 10000*exp((REF_LDTEMP_BETA*((1/REF_LDTEMP_K)-(1/REF_LDTEMP_25))));

Resistor = 290776.77 Ohm

*******************************************************************************/

u16 ADC_LDTemperature_Calc(u16 ADC_Batt, u8 ADC_Compensation)

{

float Resistor, Celsius;

Resistor = Calculation_Vout(ADC_Batt, 0);

Celsius = (REF_LDTEMP_BETA_REVERSE*log(Resistor/REF_LDTEMP_UPPERRESIS));

// DEBUGPRINT("Celsius %f\r\n", Celsius);

Celsius += (1/REF_LDTEMP_25);

// DEBUGPRINT("Celsius %f\r\n", Celsius);

Celsius = pow(Celsius, -1);

// DEBUGPRINT("Celsius %f\r\n", Celsius);

Celsius -= 273.15f;

// DEBUGPRINT("Celsius %f\r\n", Celsius);

if(Celsius < 0)

Celsius = 0;

return (u16)Celsius;

}

STM32F0 PF0(OSC_IN), PF1(OSC_OUT) 사용

from: https://eroro.tistory.com/600 PF0, PF1을 사용하기 위해 RCC_DeInit함수 사용


/* For PF0, PF1 */
RCC_DeInit();


GPIO_InitTypeDef  GPIO_InitStruct;
// AFIO_REMAP_ENABLE(AFIO_MAPR_PD01_REMAP);

  /* Enable GPIOF clock */
RCC_AHBPeriphClockCmd(PERI_BUTTON, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

GPIO_InitStruct.GPIO_Pin = PIN_BUTTON_0 | PIN_BUTTON_1;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;//GPIO_PuPd_UP; //GPIO_Mode_IPU;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(PORT_BUTTON, &GPIO_InitStruct);

 

while(1){
    if (GPIO_ReadInputDataBit(PORT_BUTTON, PIN_BUTTON_0) != SET) {/* Forward */
        DEBUGPRINT("BTN0\r\n");
    }
    if (GPIO_ReadInputDataBit(PORT_BUTTON, PIN_BUTTON_1) != SET) {/* Forward */
        DEBUGPRINT("BTN1\r\n");
    }
    GPIO_ToggleBit(PORT_LED, PIN_LED_0);
    GPIO_ToggleBit(PORT_LED, PIN_LED_1);
    Delay(100);
}

/* For PF0, PF1 */

RCC_DeInit();

GPIO_InitTypeDef GPIO_InitStruct;

// AFIO_REMAP_ENABLE(AFIO_MAPR_PD01_REMAP);

/* Enable GPIOF clock */

RCC_AHBPeriphClockCmd(PERI_BUTTON, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

GPIO_InitStruct.GPIO_Pin = PIN_BUTTON_0 | PIN_BUTTON_1;

GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;

GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;//GPIO_PuPd_UP; //GPIO_Mode_IPU;

GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;

GPIO_Init(PORT_BUTTON, &GPIO_InitStruct);

while(1){

if (GPIO_ReadInputDataBit(PORT_BUTTON, PIN_BUTTON_0) != SET) {/* Forward */

DEBUGPRINT("BTN0\r\n");

}

if (GPIO_ReadInputDataBit(PORT_BUTTON, PIN_BUTTON_1) != SET) {/* Forward */

DEBUGPRINT("BTN1\r\n");

}

GPIO_ToggleBit(PORT_LED, PIN_LED_0);

GPIO_ToggleBit(PORT_LED, PIN_LED_1);

Delay(100);

}

PCF8575 I/O 확장 칩

from: https://eroro.tistory.com/601 Remote 16-bit I/O expander for I2C-bus 테스트 프로그램 PIN 7에서 PIN 10번으로 넘어가는 부분을 PIN 8번으로 작성하였습니다.


/************************** (C) COPYRIGHT 2023  *****************
* File Name       : 
* Author            : 
* Version          : Ver 0.1
* Date               : 2023/03/15
* Description    : 
*
* Revision History
* Date          Version       Name                              Description
2023/03/15      0.1          Oanny                          Proto.
*******************************************************************************/

#ifndef __USR_I2C_H
#define __USR_I2C_H

#include "stm32f10x.h"
#include "usr_system.h"

/* ADDR : 0100 A2 A1 A0 RW */
#define PCF8575_ADDRESS 0x40 
 /* 
 DATA DIR 
  => 0100 A2 A1 A0 RW (ACK) P07 P06 P05 P04 P03 P02 P01 P00 (ACK) P17 P16 P15 P14 P13 P12 P11 P00 (ACK) 
 */

#define I2C_Speed             100000
#define I2C_1   1
#define I2C_2   2
/*
    BASE : 0100 A2 A1 A0 RW (ACK) P07 P06 P05 P04 P03 P02 P01 P00 (ACK) P17 P16 P15 P14 P13 P12 P11 P00 (ACK) 
    READ : 0100 A2 A1 A0 0 (ACK) P07 P06 P05 P04 P03 P02 P01 P00 (ACK) P17 P16 P15 P14 P13 P12 P11 P00 (ACK) 
    WRITE : 0100 A2 A1 A0 1 (ACK) P07 P06 P05 P04 P03 P02 P01 P00 (ACK) P17 P16 P15 P14 P13 P12 P11 P00 (ACK) 
*/
#define PCF8575_Pin_0                 ((uint8_t)0x0001)  /*!< Pin 0 selected */
#define PCF8575_Pin_1                 ((uint8_t)0x0002)  /*!< Pin 1 selected */
#define PCF8575_Pin_2                 ((uint8_t)0x0004)  /*!< Pin 2 selected */
#define PCF8575_Pin_3                 ((uint8_t)0x0008)  /*!< Pin 3 selected */
#define PCF8575_Pin_4                 ((uint8_t)0x0010)  /*!< Pin 4 selected */
#define PCF8575_Pin_5                 ((uint8_t)0x0020)  /*!< Pin 5 selected */
#define PCF8575_Pin_6                 ((uint8_t)0x0040)  /*!< Pin 6 selected */
#define PCF8575_Pin_7                 ((uint8_t)0x0080)  /*!< Pin 7 selected */
#define PCF8575_Pin_8                 ((uint16_t)0x0100)  /*!< Pin 8 selected */
#define PCF8575_Pin_9                 ((uint16_t)0x0200)  /*!< Pin 9 selected */
#define PCF8575_Pin_10                ((uint16_t)0x0400)  /*!< Pin 10 selected */
#define PCF8575_Pin_11                ((uint16_t)0x0800)  /*!< Pin 11 selected */
#define PCF8575_Pin_12                ((uint16_t)0x1000)  /*!< Pin 12 selected */
#define PCF8575_Pin_13                ((uint16_t)0x2000)  /*!< Pin 13 selected */
#define PCF8575_Pin_14                ((uint16_t)0x4000)  /*!< Pin 14 selected */
#define PCF8575_Pin_15                ((uint16_t)0x8000)  /*!< Pin 15 selected */
#define PCF8575_Pin_All               ((uint16_t)0xFFFF)  /*!< All pins selected */

void I2C_Config(uint8_t i2c, uint32_t speed);
void I2C2_ByteWrite(uint16_t a_DeviceAddr, uint8_t* pBuffer);
void I2C2_BufferRead(uint16_t a_DeviceAddr, uint8_t* pBuffer, uint16_t NumByteToRead);

void PCF8575_Demo(void);
#endif

* File Name :

* Author :

* Version : Ver 0.1

* Date : 2023/03/15

* Description :

* Revision History

* Date Version Name Description

2023/03/15 0.1 Oanny Proto.

*******************************************************************************/

#ifndef __USR_I2C_H

#define __USR_I2C_H

#include "stm32f10x.h"

#include "usr_system.h"

/* ADDR : 0100 A2 A1 A0 RW */

#define PCF8575_ADDRESS 0x40

DATA DIR

=> 0100 A2 A1 A0 RW (ACK) P07 P06 P05 P04 P03 P02 P01 P00 (ACK) P17 P16 P15 P14 P13 P12 P11 P00 (ACK)

#define I2C_Speed 100000

#define I2C_1 1

#define I2C_2 2

BASE : 0100 A2 A1 A0 RW (ACK) P07 P06 P05 P04 P03 P02 P01 P00 (ACK) P17 P16 P15 P14 P13 P12 P11 P00 (ACK)

READ : 0100 A2 A1 A0 0 (ACK) P07 P06 P05 P04 P03 P02 P01 P00 (ACK) P17 P16 P15 P14 P13 P12 P11 P00 (ACK)

WRITE : 0100 A2 A1 A0 1 (ACK) P07 P06 P05 P04 P03 P02 P01 P00 (ACK) P17 P16 P15 P14 P13 P12 P11 P00 (ACK)

#define PCF8575_Pin_0 ((uint8_t)0x0001) /*!< Pin 0 selected */

#define PCF8575_Pin_1 ((uint8_t)0x0002) /*!< Pin 1 selected */

#define PCF8575_Pin_2 ((uint8_t)0x0004) /*!< Pin 2 selected */

#define PCF8575_Pin_3 ((uint8_t)0x0008) /*!< Pin 3 selected */

#define PCF8575_Pin_4 ((uint8_t)0x0010) /*!< Pin 4 selected */

#define PCF8575_Pin_5 ((uint8_t)0x0020) /*!< Pin 5 selected */

#define PCF8575_Pin_6 ((uint8_t)0x0040) /*!< Pin 6 selected */

#define PCF8575_Pin_7 ((uint8_t)0x0080) /*!< Pin 7 selected */

#define PCF8575_Pin_8 ((uint16_t)0x0100) /*!< Pin 8 selected */

#define PCF8575_Pin_9 ((uint16_t)0x0200) /*!< Pin 9 selected */

#define PCF8575_Pin_10 ((uint16_t)0x0400) /*!< Pin 10 selected */

#define PCF8575_Pin_11 ((uint16_t)0x0800) /*!< Pin 11 selected */

#define PCF8575_Pin_12 ((uint16_t)0x1000) /*!< Pin 12 selected */

#define PCF8575_Pin_13 ((uint16_t)0x2000) /*!< Pin 13 selected */

#define PCF8575_Pin_14 ((uint16_t)0x4000) /*!< Pin 14 selected */

#define PCF8575_Pin_15 ((uint16_t)0x8000) /*!< Pin 15 selected */

#define PCF8575_Pin_All ((uint16_t)0xFFFF) /*!< All pins selected */

void I2C_Config(uint8_t i2c, uint32_t speed);

void I2C2_ByteWrite(uint16_t a_DeviceAddr, uint8_t* pBuffer);

void I2C2_BufferRead(uint16_t a_DeviceAddr, uint8_t* pBuffer, uint16_t NumByteToRead);

void PCF8575_Demo(void);

#endif


/************************** (C) COPYRIGHT 2023  *****************
* File Name       : 
* Author            : 
* Version          : Ver 0.1
* Date               : 2023/03/15
* Description    : 
*
* Revision History
* Date          Version       Name                              Description
2023/03/15      0.1          Oanny                          Proto.
*******************************************************************************/

#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "usr_i2c.h"
#include "usr_uart.h"


/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes ------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

#if 0
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
/*******************************************************************************
* Function Name : 
* Parameters    : 
* Return        : none
* Description   : 
*******************************************************************************/
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
  while(BufferLength--)
  {
    if(*pBuffer1 != *pBuffer2)
    {
      return FAILED;
    }
    
    pBuffer1++;
    pBuffer2++;
  }

  return PASSED;  
}
#endif

/*******************************************************************************
* Function Name : 
* Parameters    : 
* Return        : none
* Description   : 
- I2C2 -
PB10 EN
PB11 FREQ
I2C_Config(I2C_1, I2C_Speed);
*******************************************************************************/
void I2C_Config(uint8_t i2c, uint32_t speed)
{
  GPIO_InitTypeDef  GPIO_InitStructure; 
  I2C_InitTypeDef  I2C_InitStructure; 

    if(i2c == I2C_1){       
        /* I2C Periph clock enable */
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);   

        /* GPIO Periph clock enable */
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
        
        /* Configure I2C1 pins: SCL and SDA */
        GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7; 
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
        
        /* I2C configuration */
        I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
        I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
        I2C_InitStructure.I2C_OwnAddress1 = PCF8575_ADDRESS;
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
        I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
        I2C_InitStructure.I2C_ClockSpeed = speed;
        
        /* I2C Peripheral Enable */
        I2C_Cmd(I2C1, ENABLE);
        /* Apply I2C configuration after enabling it */
        I2C_Init(I2C1, &I2C_InitStructure);     
    }
    else if(i2c == I2C_2){
        /* I2C Periph clock enable */
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);   

        /* GPIO Periph clock enable */
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
        
        /* Configure I2C2 pins: SCL and SDA */
        GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_10 | GPIO_Pin_11; 
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
        
        /* I2C configuration */
        I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
        I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
        I2C_InitStructure.I2C_OwnAddress1 = PCF8575_ADDRESS;
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
        I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
        I2C_InitStructure.I2C_ClockSpeed = speed;
        
        /* I2C Peripheral Enable */
        I2C_Cmd(I2C2, ENABLE);
        /* Apply I2C configuration after enabling it */
        I2C_Init(I2C2, &I2C_InitStructure);             
    }
}

#define I2C_TIMEOUT 0x100000
/*******************************************************************************
* Function Name : 
* Parameters    : 
* Return        : none
* Description   : 
*******************************************************************************/
void I2C2_ByteWrite(uint16_t a_DeviceAddr, uint8_t* pBuffer)
{
    uint32_t I2C_Timeout = I2C_TIMEOUT;
    
  /* Send STRAT condition */
  I2C_GenerateSTART(I2C2, ENABLE);

  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }

  /* Send EEPROM address for write */
  I2C_Send7bitAddress(I2C2, a_DeviceAddr, I2C_Direction_Transmitter);
  
    I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }

  /* Send the byte to be written */
  I2C_SendData(I2C2, pBuffer[0]); 
   
     I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV8 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }       

  /* Send the byte to be written */
  I2C_SendData(I2C2, pBuffer[1]); 
   
     I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV8 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }       

  /* Send STOP condition */
  I2C_GenerateSTOP(I2C2, ENABLE);
}

/*******************************************************************************
* Function Name : 
* Description   : 
* Parameters    : None
* Return        : None
*******************************************************************************/    
void I2C2_ByteRead(uint16_t a_DeviceAddr, uint8_t* pBuffer, uint16_t NumByteToRead)
{
    uint32_t I2C_Timeout = I2C_TIMEOUT;
    
    /* While the bus is busy */
  while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }               
      
  /* Send STRAT condition a second time */  
  I2C_GenerateSTART(I2C2, ENABLE);
  
    I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }  
    
  /* Send EEPROM address for read */
  I2C_Send7bitAddress(I2C2, a_DeviceAddr, I2C_Direction_Receiver);
  
    I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }  
  
  /* While there is data to be read */
  while(NumByteToRead) {
    if(NumByteToRead == 1){
      /* Disable Acknowledgement */
      I2C_AcknowledgeConfig(I2C2, DISABLE);
      
      /* Send STOP Condition */
      I2C_GenerateSTOP(I2C2, ENABLE);
    }

    /* Test on EV7 and clear it */
    if(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)){      
      /* Read a byte from the EEPROM */
      *pBuffer = I2C_ReceiveData(I2C2);

      /* Point to the next location where the byte read will be saved */
      pBuffer++; 
      
      /* Decrement the read bytes counter */
      NumByteToRead--;        
    }   
  }

  /* Enable Acknowledgement to be ready for another reception */
  I2C_AcknowledgeConfig(I2C2, ENABLE);
}

/*******************************************************************************
* Function Name : 
* Parameters    : 
* Return        : none
* Description   : 
*******************************************************************************/
void I2C2_HalfWordWrite(uint16_t a_DeviceAddr, uint16_t pBuffer)
{
    uint32_t I2C_Timeout = I2C_TIMEOUT;
    
  /* Send STRAT condition */
  I2C_GenerateSTART(I2C2, ENABLE);

  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }

  /* Send EEPROM address for write */
  I2C_Send7bitAddress(I2C2, a_DeviceAddr, I2C_Direction_Transmitter);
  
    I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }

  /* Send the byte to be written */
  I2C_SendData(I2C2, (uint8_t)(pBuffer & 0x00FF)); 
//  DEBUGPRINT("W1 %X\r\n", (uint8_t)(pBuffer & 0x00FF));
   
     I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV8 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }       

  /* Send the byte to be written */
  I2C_SendData(I2C2, (uint8_t)((pBuffer & 0xFF00) >> 8)); 
//  DEBUGPRINT("W2 %X\r\n", (uint8_t)((pBuffer & 0xFF00) >> 8));
   
  I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV8 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }       

  /* Send STOP condition */
  I2C_GenerateSTOP(I2C2, ENABLE);
}

/*******************************************************************************
* Function Name : 
* Description   : 
* Parameters    : None
* Return        : None
*******************************************************************************/    
uint16_t I2C2_HalfWordRead(uint16_t a_DeviceAddr)
{
    uint32_t I2C_Timeout = I2C_TIMEOUT;
    uint8_t I2C_Buffer[2], Buf_Poi = 0, NumByteToRead;
    
    /* While the bus is busy */
  while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }               
      
  /* Send STRAT condition a second time */  
  I2C_GenerateSTART(I2C2, ENABLE);
  
    I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }  
    
  /* Send EEPROM address for read */
  I2C_Send7bitAddress(I2C2, a_DeviceAddr, I2C_Direction_Receiver);
  
    I2C_Timeout = I2C_TIMEOUT;
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)){
        I2C_Timeout--;
        if(I2C_Timeout < 1)
            break;
    }  
  
  NumByteToRead = 2;
  /* While there is data to be read */
  while(NumByteToRead) {
    if(NumByteToRead == 1){
      /* Disable Acknowledgement */
      I2C_AcknowledgeConfig(I2C2, DISABLE);
      
      /* Send STOP Condition */
      I2C_GenerateSTOP(I2C2, ENABLE);
    }

    /* Test on EV7 and clear it */
    if(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)){      
      /* Read a byte from the EEPROM */
      I2C_Buffer[Buf_Poi] = I2C_ReceiveData(I2C2);

      /* Point to the next location where the byte read will be saved */
      Buf_Poi++; 
      
      /* Decrement the read bytes counter */
      NumByteToRead--;        
    }   
  }

  /* Enable Acknowledgement to be ready for another reception */
  I2C_AcknowledgeConfig(I2C2, ENABLE);
  
  return I2C_Buffer[0] | (I2C_Buffer[1] << 8);  
}

/*******************************************************************************
* Function Name : 
* Description   : 
* Parameters    : None
* Return        : None
*******************************************************************************/
uint8_t PCF8575_ReadInputDataBit(uint16_t GPIO_Pin)
{
  uint8_t bitstatus = 0x00;  
  
  if ((I2C2_HalfWordRead(PCF8575_ADDRESS) & GPIO_Pin) != (uint32_t)Bit_RESET){
    bitstatus = (uint8_t)Bit_SET;
  }
  else{
    bitstatus = (uint8_t)Bit_RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name : 
* Description   : 
* Parameters    : None
* Return        : None
*******************************************************************************/    
void PCF8575_Demo(void)
{
    
    I2C_Config(I2C_2, I2C_Speed);
    while(1){
    #if 0
        uint8_t i = 0;
        uint8_t I2C_Buffer[2] = {0, };
        
        if(i == 0){
            I2C_Buffer[0] = 0;
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 1){
            I2C_Buffer[0] = (uint8_t)GPIO_Pin_0;
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 2){
            I2C_Buffer[0] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1);
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 3){
            I2C_Buffer[0] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2);
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 4){
            I2C_Buffer[0] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3);
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 5){
            I2C_Buffer[0] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4);
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 6){
            I2C_Buffer[0] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5);
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 7){
            I2C_Buffer[0] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6);
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 8){
            I2C_Buffer[0] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);
            I2C_Buffer[1] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 9){
            I2C_Buffer[1] = (uint8_t)GPIO_Pin_0;
            I2C_Buffer[0] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 10){
            I2C_Buffer[1] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1);
            I2C_Buffer[0] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 11){
            I2C_Buffer[1] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2);
            I2C_Buffer[0] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 12){
            I2C_Buffer[1] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3);
            I2C_Buffer[0] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 13){
            I2C_Buffer[1] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4);
            I2C_Buffer[0] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 14){
            I2C_Buffer[1] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5);
            I2C_Buffer[0] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 15){
            I2C_Buffer[1] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6);
            I2C_Buffer[0] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        else if(i == 16){
            I2C_Buffer[1] = (uint8_t)(GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);
            I2C_Buffer[0] = 0;
//          DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        }
        GPIO_ToggleBit(GPIOA, GPIO_Pin_3);      
        I2C2_ByteWrite(PCF8575_ADDRESS, I2C_Buffer);    
        delay_ms(500);
        I2C_Buffer[0] = 0;
        I2C_Buffer[1] = 0;
        I2C2_ByteRead(PCF8575_ADDRESS, I2C_Buffer, 2); 
        DEBUGPRINT("%X, %X\r\n", I2C_Buffer[0], I2C_Buffer[1]);
        i++;
        if(i > 16)
            i=0;
#else
        uint16_t I2C_Buffer;

        I2C_Buffer = PCF8575_Pin_0 | PCF8575_Pin_8 | PCF8575_Pin_9; 
        GPIO_ToggleBit(GPIOA, GPIO_Pin_3);      
        I2C2_HalfWordWrite(PCF8575_ADDRESS, I2C_Buffer);    
        I2C_Buffer = 0;
        DEBUGPRINT("R1 %X\r\n", I2C2_HalfWordRead(PCF8575_ADDRESS));
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_0) == Bit_SET){
            DEBUGPRINT("P0 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_1) == Bit_SET){
            DEBUGPRINT("P1 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_2) == Bit_SET){
            DEBUGPRINT("P2 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_3) == Bit_SET){
            DEBUGPRINT("P3 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_4) == Bit_SET){
            DEBUGPRINT("P4 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_5) == Bit_SET){
            DEBUGPRINT("P5 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_6) == Bit_SET){
            DEBUGPRINT("P6 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_7) == Bit_SET){
            DEBUGPRINT("P7 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_8) == Bit_SET){
            DEBUGPRINT("P8 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_9) == Bit_SET){
            DEBUGPRINT("P9 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_10) == Bit_SET){
            DEBUGPRINT("P10 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_11) == Bit_SET){
            DEBUGPRINT("P11 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_12) == Bit_SET){
            DEBUGPRINT("P12 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_13) == Bit_SET){
            DEBUGPRINT("P13 Set\r\n");
        }
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_14) == Bit_SET){
            DEBUGPRINT("P14 Set\r\n");
        }       
        if(PCF8575_ReadInputDataBit(PCF8575_Pin_15) == Bit_SET){
            DEBUGPRINT("P15 Set\r\n");
        }       
        
        delay_ms(500);
        I2C_Buffer = 0; 
        GPIO_ToggleBit(GPIOA, GPIO_Pin_3);      
        I2C2_HalfWordWrite(PCF8575_ADDRESS, I2C_Buffer);    
        I2C_Buffer = 0;
//      DEBUGPRINT("R2 %X\r\n", I2C2_HalfWordRead(PCF8575_ADDRESS));
        delay_ms(500);
#endif      
    }
}

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* File Name :

* Author :

* Version : Ver 0.1

* Date : 2023/03/15

* Description :

* Revision History

* Date Version Name Description

2023/03/15 0.1 Oanny Proto.

*******************************************************************************/

#include <stdarg.h>

#include <stdio.h>

#include <string.h>

#include "usr_i2c.h"

#include "usr_uart.h"

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

/* Private macro ------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* Private function prototypes ------------------------------------------------*/

/* Private functions ---------------------------------------------------------*/

#if 0

typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;

/*******************************************************************************

* Function Name :

* Parameters :

* Return : none

* Description :

*******************************************************************************/

TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)

{

while(BufferLength--)

{

if(*pBuffer1 != *pBuffer2)

{

return FAILED;

}

pBuffer1++;

pBuffer2++;

}

return PASSED;

}

#endif

/*******************************************************************************

* Function Name :

* Parameters :

* Return : none

* Description :

- I2C2 -

PB10 EN

PB11 FREQ

I2C_Config(I2C_1, I2C_Speed);

*******************************************************************************/

void I2C_Config(uint8_t i2c, uint32_t speed)

{

GPIO_InitTypeDef GPIO_InitStructure;

I2C_InitTypeDef I2C_InitStructure;

if(i2c == I2C_1){

/* I2C Periph clock enable */

RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

/* GPIO Periph clock enable */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

/* Configure I2C1 pins: SCL and SDA */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

GPIO_Init(GPIOB, &GPIO_InitStructure);

/* I2C configuration */

I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;

I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;

I2C_InitStructure.I2C_OwnAddress1 = PCF8575_ADDRESS;

I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;

I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

I2C_InitStructure.I2C_ClockSpeed = speed;

/* I2C Peripheral Enable */

I2C_Cmd(I2C1, ENABLE);

/* Apply I2C configuration after enabling it */

I2C_Init(I2C1, &I2C_InitStructure);

}

else if(i2c == I2C_2){

/* I2C Periph clock enable */

RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);

/* GPIO Periph clock enable */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

/* Configure I2C2 pins: SCL and SDA */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

GPIO_Init(GPIOB, &GPIO_InitStructure);

/* I2C configuration */

I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;

I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;

I2C_InitStructure.I2C_OwnAddress1 = PCF8575_ADDRESS;

I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;

I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

I2C_InitStructure.I2C_ClockSpeed = speed;

/* I2C Peripheral Enable */

I2C_Cmd(I2C2, ENABLE);

/* Apply I2C configuration after enabling it */

I2C_Init(I2C2, &I2C_InitStructure);

}

#define I2C_TIMEOUT 0x100000

/*******************************************************************************

* Function Name :

* Parameters :

* Return : none

* Description :

*******************************************************************************/

void I2C2_ByteWrite(uint16_t a_DeviceAddr, uint8_t* pBuffer)

{

uint32_t I2C_Timeout = I2C_TIMEOUT;

/* Send STRAT condition */

I2C_GenerateSTART(I2C2, ENABLE);

/* Test on EV5 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send EEPROM address for write */

I2C_Send7bitAddress(I2C2, a_DeviceAddr, I2C_Direction_Transmitter);

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV6 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send the byte to be written */

I2C_SendData(I2C2, pBuffer[0]);

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV8 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send the byte to be written */

I2C_SendData(I2C2, pBuffer[1]);

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV8 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send STOP condition */

I2C_GenerateSTOP(I2C2, ENABLE);

}

/*******************************************************************************

* Function Name :

* Description :

* Parameters : None

* Return : None

*******************************************************************************/

void I2C2_ByteRead(uint16_t a_DeviceAddr, uint8_t* pBuffer, uint16_t NumByteToRead)

{

uint32_t I2C_Timeout = I2C_TIMEOUT;

/* While the bus is busy */

while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send STRAT condition a second time */

I2C_GenerateSTART(I2C2, ENABLE);

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV5 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send EEPROM address for read */

I2C_Send7bitAddress(I2C2, a_DeviceAddr, I2C_Direction_Receiver);

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV6 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* While there is data to be read */

while(NumByteToRead) {

if(NumByteToRead == 1){

/* Disable Acknowledgement */

I2C_AcknowledgeConfig(I2C2, DISABLE);

/* Send STOP Condition */

I2C_GenerateSTOP(I2C2, ENABLE);

}

/* Test on EV7 and clear it */

if(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)){

/* Read a byte from the EEPROM */

*pBuffer = I2C_ReceiveData(I2C2);

/* Point to the next location where the byte read will be saved */

pBuffer++;

/* Decrement the read bytes counter */

NumByteToRead--;

}

/* Enable Acknowledgement to be ready for another reception */

I2C_AcknowledgeConfig(I2C2, ENABLE);

}

/*******************************************************************************

* Function Name :

* Parameters :

* Return : none

* Description :

*******************************************************************************/

void I2C2_HalfWordWrite(uint16_t a_DeviceAddr, uint16_t pBuffer)

{

uint32_t I2C_Timeout = I2C_TIMEOUT;

/* Send STRAT condition */

I2C_GenerateSTART(I2C2, ENABLE);

/* Test on EV5 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send EEPROM address for write */

I2C_Send7bitAddress(I2C2, a_DeviceAddr, I2C_Direction_Transmitter);

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV6 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send the byte to be written */

I2C_SendData(I2C2, (uint8_t)(pBuffer & 0x00FF));

// DEBUGPRINT("W1 %X\r\n", (uint8_t)(pBuffer & 0x00FF));

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV8 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send the byte to be written */

I2C_SendData(I2C2, (uint8_t)((pBuffer & 0xFF00) >> 8));

// DEBUGPRINT("W2 %X\r\n", (uint8_t)((pBuffer & 0xFF00) >> 8));

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV8 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send STOP condition */

I2C_GenerateSTOP(I2C2, ENABLE);

}

/*******************************************************************************

* Function Name :

* Description :

* Parameters : None

* Return : None

*******************************************************************************/

uint16_t I2C2_HalfWordRead(uint16_t a_DeviceAddr)

{

uint32_t I2C_Timeout = I2C_TIMEOUT;

uint8_t I2C_Buffer[2], Buf_Poi = 0, NumByteToRead;

/* While the bus is busy */

while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send STRAT condition a second time */

I2C_GenerateSTART(I2C2, ENABLE);

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV5 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

/* Send EEPROM address for read */

I2C_Send7bitAddress(I2C2, a_DeviceAddr, I2C_Direction_Receiver);

I2C_Timeout = I2C_TIMEOUT;

/* Test on EV6 and clear it */

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)){

I2C_Timeout--;

if(I2C_Timeout < 1)

break;

}

NumByteToRead = 2;

/* While there is data to be read */

while(NumByteToRead) {

if(NumByteToRead == 1){

/* Disable Acknowledgement */

I2C_AcknowledgeConfig(I2C2, DISABLE);

/* Send STOP Condition */

I2C_GenerateSTOP(I2C2, ENABLE);

}

/* Test on EV7 and clear it */

if(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)){

/* Read a byte from the EEPROM */

I2C_Buffer[Buf_Poi] = I2C_ReceiveData(I2C2);

/* Point to the next location where the byte read will be saved */

Buf_Poi++;

/* Decrement the read bytes counter */

NumByteToRead--;

}

/* Enable Acknowledgement to be ready for another reception */

I2C_AcknowledgeConfig(I2C2, ENABLE);

return I2C_Buffer[0] | (I2C_Buffer[1] << 8);

}

/*******************************************************************************

* Function Name :

* Description :

* Parameters : None

* Return : None

*******************************************************************************/

uint8_t PCF8575_ReadInputDataBit(uint16_t GPIO_Pin)

{

uint8_t bitstatus = 0x00;

if ((I2C2_HalfWordRead(PCF8575_ADDRESS) & GPIO_Pin) != (uint32_t)Bit_RESET){

bitstatus = (uint8_t)Bit_SET;

}

else{

bitstatus = (uint8_t)Bit_RESET;

}

return bitstatus;

}

/*******************************************************************************

* Function Name :

* Description :

* Parameters : None

* Return : None

*******************************************************************************/

void PCF8575_Demo(void)

{

I2C_Config(I2C_2, I2C_Speed);

while(1){

#if 0

uint8_t i = 0;

uint8_t I2C_Buffer[2] = {0, };

if(i == 0){

I2C_Buffer[0] = 0;

I2C_Buffer[1] = 0;