/*************************************************************************
* Function Name: HD44780_Rd_IO
* @in: None
* @out: uint8
* Description: Read from HD44780 I/O
*************************************************************************/
uint8 HD44780_Read_IO(void)
{
uint8 Data = 0;
HD44780_Data_In();
HD44780_Set_RW(1);
// Read Data
HD44780_Set_E(1);
HD44780_BUS_DLY();
Data = (HD44780_D7_READ() << 3);
Data |= (HD44780_D6_READ() << 2);
Data |= (HD44780_D5_READ() << 1);
Data |= (HD44780_D4_READ() << 0);
#if HD44780_BUS_WIDTH == 8
Data <<= 4;
Data |= (HD44780_D3_READ() << 3);
Data |= (HD44780_D2_READ() << 2);
Data |= (HD44780_D1_READ() << 1);
Data |= (HD44780_D0_READ() << 0);
#endif
HD44780_Set_E(0);
return Data;
}
/*************************************************************************
* Function Name: HD44780_Wr_IO
* @in: uint8 Data
* @out: None
* Description: Write to HD44780 I/O
*************************************************************************/
void HD44780_Write_IO(uint8 Data)
{
HD44780_Data_Out();
#if HD44780_WR > 0
HD44780_Set_RW(0);
#endif
// Write Data
// Clock E
HD44780_Set_E(1);
#if HD44780_BUS_WIDTH != 8
Data <<= 4;
#endif
if(Data & 0x80)
HD44780_D7_SET();
else
HD44780_D7_CLR();
if(Data & 0x40)
HD44780_D6_SET();
else
HD44780_D6_CLR();
if(Data & 0x20)
HD44780_D5_SET();
else
HD44780_D5_CLR();
if(Data & 0x10)
HD44780_D4_SET();
else
HD44780_D4_CLR();
#if HD44780_BUS_WIDTH == 8
if(Data & 0x08)
HD44780_D3_SET();
else
HD44780_D3_CLR();
if(Data & 0x04)
HD44780_D2_SET();
else
HD44780_D2_CLR();
if(Data & 0x02)
HD44780_D1_SET();
else
HD44780_D1_CLR();
if(Data & 0x01)
HD44780_D0_SET();
else
HD44780_D0_CLR();
#endif
HD44780_BUS_DLY();
HD44780_Set_E(0);
}
/*************************************************************************
* Function Name: HD44780_BusyCheck
* Parameters: Int8U * AddCount, Int32U MaxDly
* Return: HD44780_ERROR_CODE_DEF
* HD44780_OK 0: Pass
* HD44780_ERROR 1: Busy check Time Out
* Description: Wait MaxDly *100u or until the busy flag is clear
*
*************************************************************************/
HD44780_ERROR_CODE_DEF HD44780_BusyCheck (Int8U * AddCount, Int32U MaxDly)
{
#if HD4780_WR > 0
Int8U AddHold;
#endif
for (;MaxDly;--MaxDly)
{
#if HD4780_WR > 0
AddHold = HD44780RdStatus();
if ((AddHold & HD44780_STATUS_BUSY_MASK) == 0)
{
/* Wait 1.5 * Tlcd */
HD44780_BUS_DLY();
HD44780_BUS_DLY();
/* Get current AC */
AddHold = HD44780RdStatus();
AddHold &= HD44780_STATUS_AC_MASK;
if(AddCount != NULL)
{
*AddCount = AddHold;
}
return HD44780_OK;
}
#endif
Dly100us((void *)1);
}
#if HD4780_WR > 0
return HD44780_BUSY_TO_ERROR;
#else
if(AddCount != NULL)
{
*AddCount = DataRamAddHold;
}
return HD44780_OK;
#endif
}
