void lcd_init(void)
{
I2C0Init( ); /* initialize I2c0 */
lcd_init_cmd();
}
/*******************************************************************************
** Main Function main()
*******************************************************************************/
int main (void)
{
uint32_t i;
/* SystemClockUpdate() updates the SystemFrequency variable */
SystemClockUpdate();
I2C0Init( ); /* initialize I2c0 */
I2C1Init( ); /* initialize I2c1 */
I2C2Init( ); /* initialize I2c2 */
/* In order to start the I2CEngine, the all the parameters
must be set in advance, including I2CWriteLength, I2CReadLength,
I2CCmd, and the I2cMasterBuffer which contains the stream
command/data to the I2c slave device.
(1) If it's a I2C write only, the number of bytes to be written is
I2CWriteLength, I2CReadLength is zero, the content will be filled
in the I2CMasterBuffer.
(2) If it's a I2C read only, the number of bytes to be read is
I2CReadLength, I2CWriteLength is 0, the read value will be filled
in the I2CMasterBuffer.
(3) If it's a I2C Write/Read with repeated start, specify the
I2CWriteLength, fill the content of bytes to be written in
I2CMasterBuffer, specify the I2CReadLength, after the repeated
start and the device address with RD bit set, the content of the
reading will be filled in I2CMasterBuffer index at
I2CMasterBuffer[I2CWriteLength+2].
e.g. Start, DevAddr(W), WRByte1...WRByteN, Repeated-Start, DevAddr(R),
RDByte1...RDByteN Stop. The content of the reading will be filled
after (I2CWriteLength + two devaddr) bytes. */
/* Write SLA(W), address and one data byte */
I2CWriteLength[PORT_USED] = 6;
I2CReadLength[PORT_USED] = 0;
I2CMasterBuffer[PORT_USED][0] = PCF8594_ADDR;
I2CMasterBuffer[PORT_USED][1] = 0x00; /* address */
I2CMasterBuffer[PORT_USED][2] = 0x55; /* Data0 */
I2CMasterBuffer[PORT_USED][3] = 0xAA; /* Data1 */
I2CMasterBuffer[PORT_USED][4] = 0x12; /* Data0 */
I2CMasterBuffer[PORT_USED][5] = 0x34; /* Data1 */
I2CEngine( PORT_USED );
/* Be careful with below fixed delay. From device to device, or
even same device with different write length, or various I2C clock,
below delay length may need to be changed accordingly. Having
a break point before Write/Read start will be helpful to isolate
the problem. */
for ( i = 0; i < 0x200000; i++ ); /* Delay after write */
for ( i = 0; i < BUFSIZE; i++ )
{
I2CSlaveBuffer[PORT_USED][i] = 0x00;
}
/* Write SLA(W), address, SLA(R), and read one byte back. */
I2CWriteLength[PORT_USED] = 2;
I2CReadLength[PORT_USED] = 4;
I2CMasterBuffer[PORT_USED][0] = PCF8594_ADDR;
I2CMasterBuffer[PORT_USED][1] = 0x00; /* address */
I2CMasterBuffer[PORT_USED][2] = PCF8594_ADDR | RD_BIT;
I2CEngine( PORT_USED );
/* Check the content of the Master and slave buffer */
while ( 1 );
}
