C++ (Cpp) i2c_master_getDC Beispiele

Beispiel #1

Datei: i2c_master.c Projekt: alemoke/esp8266-frankenstein

/******************************************************************************
 * FunctionName : i2c_master_readByte
 * Description  : read Byte from i2c bus
 * Parameters   : NONE
 * Returns	  : uint8 - readed value
*******************************************************************************/
uint8 i2c_master_readByte(void)
{
	uint8 retVal = 0;
	uint8 k, i;

	i2c_master_setDC(1, m_nLastSCL);

	for (i = 0; i < 8; i++) {
		i2c_master_wait(I2C_SLEEP_TIME);
		i2c_master_setDC(1, 0);
		i2c_master_wait(I2C_SLEEP_TIME);// sda 1, scl 0
		i2c_master_setDC(1, 1);
		while(i2c_master_getCL()==0)
			;		// clock stretch
		i2c_master_wait(I2C_SLEEP_TIME);// sda 1, scl 1

		k = i2c_master_getDC();
		i2c_master_wait(I2C_SLEEP_TIME);

		//if (i == 7) {
		//	i2c_master_wait(5);   ////
		//}

		k <<= (7 - i);
		retVal |= k;
	}

	i2c_master_setDC(m_nLastSDA, 0);
	i2c_master_wait(I2C_SLEEP_TIME);// sda 1, scl 0

	return retVal;
}

Beispiel #2

Datei: i2c_master.c Projekt: Daven005/ESP8266

/******************************************************************************
 * FunctionName : i2c_master_readByte
 * Description  : read Byte from i2c bus
 * Parameters   : NONE
 * Returns      : uint8 - readed value
*******************************************************************************/
uint8 ICACHE_FLASH_ATTR
i2c_master_readByte(void)
{
    uint8 retVal = 0;
    uint8 k, i;

    i2c_master_wait(5);
    i2c_master_setDC(m_nLastSDA, 0);
    i2c_master_wait(5);	// sda 1, scl 0

    for (i = 0; i < 8; i++) {
        i2c_master_wait(5);
        i2c_master_setDC(1, 0);
        i2c_master_wait(5);	// sda 1, scl 0
        i2c_master_setDC(1, 1);
        i2c_master_wait(5);	// sda 1, scl 1

        k = i2c_master_getDC();
        i2c_master_wait(5);

        if (i == 7) {
            i2c_master_wait(3);   ////
        }

        k <<= (7 - i);
        retVal |= k;
    }

    i2c_master_setDC(1, 0);
    i2c_master_wait(5);	// sda 1, scl 0

    return retVal;
}

Beispiel #3

Datei: i2c_master.c Projekt: nkolban/Espruino

/******************************************************************************
 * FunctionName : i2c_master_getAck
 * Description  : confirm if peer send ack
 * Parameters   : NONE
 * Returns      : uint8 - ack value, 0 or 1
*******************************************************************************/
uint8 ICACHE_FLASH_ATTR
i2c_master_getAck(void)
{
    uint8 retVal;
    i2c_master_setDC(1, 0);
    i2c_master_wait(2);
    i2c_master_setDC(1, 1);
    i2c_master_wait(4);
    retVal = i2c_master_getDC();
    i2c_master_setDC(1, 0);
    i2c_master_wait(2);

    return !retVal; // 0->true->ACK, 1->false->NACK
}

Beispiel #4

Datei: i2c_master.c Projekt: modSwap/ESP8266

/******************************************************************************
 * FunctionName : i2c_master_getAck
 * Description  : confirm if peer send ack
 * Parameters   : NONE
 * Returns	  : uint8 - ack value, 0 or 1
*******************************************************************************/
uint8 ICACHE_FLASH_ATTR
i2c_master_getAck(void)
{
	uint8 retVal;
	i2c_master_setDC(m_nLastSDA, 0);
	i2c_master_setDC(1, 0);
	i2c_master_wait(I2C_DELAY); // extra delay
	i2c_master_setDC(1, 1);

	retVal = i2c_master_getDC();
	
	i2c_master_setDC(1, 0);
	
	return retVal;
}

Beispiel #5

Datei: i2c_master.c Projekt: alemoke/esp8266-frankenstein

/******************************************************************************
 * FunctionName : i2c_master_getAck
 * Description  : confirm if peer send ack
 * Parameters   : NONE
 * Returns	  : uint8 - ack value, 0 or 1
*******************************************************************************/
uint8 i2c_master_getAck(void)
{
	uint8 retVal;
	i2c_master_setDC(m_nLastSDA, 0);
	i2c_master_wait(I2C_SLEEP_TIME);
	i2c_master_setDC(1, 0);
	i2c_master_wait(I2C_SLEEP_TIME);
	i2c_master_setDC(1, 1);
	i2c_master_wait(I2C_SLEEP_TIME);

	retVal = i2c_master_getDC();
	i2c_master_wait(I2C_SLEEP_TIME);
	i2c_master_setDC(1, 0);
	i2c_master_wait(I2C_SLEEP_TIME);

	return retVal;
}

Beispiel #6

Datei: i2c_master.c Projekt: Daven005/ESP8266

/******************************************************************************
 * FunctionName : i2c_master_getAck
 * Description  : confirm if peer send ack
 * Parameters   : NONE
 * Returns      : uint8 - ack value, 0 or 1
*******************************************************************************/
uint8 ICACHE_FLASH_ATTR
i2c_master_getAck(void)
{
    uint8 retVal;
    i2c_master_setDC(m_nLastSDA, 0);
    i2c_master_wait(5);
    i2c_master_setDC(1, 0);
    i2c_master_wait(5);
    i2c_master_setDC(1, 1);
    i2c_master_wait(5);

    retVal = i2c_master_getDC();
    i2c_master_wait(5);
    i2c_master_setDC(1, 0);
    i2c_master_wait(5);

    return retVal;
}

Beispiel #7

Datei: i2c_master.c Projekt: nkolban/Espruino

/******************************************************************************
 * FunctionName : i2c_master_readByte
 * Description  : read Byte from i2c bus
 * Parameters   : NONE
 * Returns      : uint8 - readed value
*******************************************************************************/
uint8 ICACHE_FLASH_ATTR
i2c_master_readByte(void)
{
    uint8 retVal = 0;
    uint8 i;

    i2c_master_wait(2);
    i2c_master_setDC(m_nLastSDA, 0);
    i2c_master_wait(4);	// sda 1, scl 0

    for (i = 0; i < 8; i++) {
        i2c_master_setDC(1, 0);
        i2c_master_wait(4);	// sda 1, scl 0
        i2c_master_setDC(1, 1);
        i2c_master_wait(3);	// sda 1, scl 1
        retVal = (retVal<<1) | (i2c_master_getDC()&1);
    }

    i2c_master_setDC(1, 0);
    i2c_master_wait(2);	// sda 1, scl 0

    return retVal;
}