- /*************************************************************************
- *
- * Used with ICCARM and AARM.
- *
- * (c) Copyright IAR Systems 2005
- *
- * File name : drv_hd44780_l.c
- * Description : I/O function
- *
- * History :
- * 1. Data : June 13, 2005
- * Author : Stanimir Bonev
- * Description : Create
- *
- * $Revision: 1.1.2.1 $
- **************************************************************************/
- void HD44780_IO_Init (void);
- void HD44780SetRS (Boolean Data);
- void HD44780SetE (Boolean Data);
- #if HD4780_WR > 0
- void HD44780SetRW (Boolean Data);
- Int8U HD44780RdIO (void);
- #endif
- void HD44780WrIO (Int8U);
- #define HD44780_INPUT_SET_MASK ~0x00003C00
- #define HD44780_OUTPUT_SET_MASK 0x30403C00
- /*************************************************************************
- * Function Name: HD44780_IO_Init
- * Parameters: none
- * Return: none
- * Description: Init IO ports directions and level
- *
- *************************************************************************/
- void HD44780_IO_Init (void)
- {
- PINSEL0 &= ~0x0FF00000;
- PINSEL1 &= ~0x0F003000;
- IO0DIR |= HD44780_OUTPUT_SET_MASK;
- // RS Ouput - Low
- HD44780SetRS(0);
- // E Ouput - Low
- HD44780SetE(0);
- #if HD4780_WR > 0
- // WR Ouput - Low
- HD44780SetRW(0);
- #endif
- }
- /*************************************************************************
- * Function Name: HD44780SetRS
- * Parameters: Boolean Data
- * Return: none
- * Description: Set RS signal
- *
- *************************************************************************/
- void HD44780SetRS (Boolean Data)
- {
- if(Data)
- {
- IO0SET = 1<<22;
- }
- else
- {
- IO0CLR = 1<<22;
- }
- }
- /*************************************************************************
- * Function Name: HD44780SetE
- * Parameters: Boolean Data
- * Return: none
- * Description: Set E signal
- *
- *************************************************************************/
- void HD44780SetE (Boolean Data)
- {
- if(Data)
- {
- IO0SET = 1<<28;
- }
- else
- {
- IO0CLR = 1<<28;
- }
- }
- /*************************************************************************
- * Function Name: HD44780WrIO
- * Parameters: Int8U Data
- * Return: none
- * Description: Write to HD44780 I/O
- *
- *************************************************************************/
- void HD44780WrIO (Int8U Data)
- {
- Int32U Tmp = (Int32U)Data << 10;
- // Set Direction
- IO0DIR |= HD44780_OUTPUT_SET_MASK;
- #if HD4780_WR > 0
- HD44780SetRW(0);
- #endif
- // Write Data
- // Clock E
- HD44780SetE(1);
- IO0SET |= Tmp & 0x3C00;
- IO0CLR |= ~Tmp & 0x3C00 ;
- HD44780_BUS_DLY();
- HD44780SetE(0);
- }
- #if HD4780_WR > 0
- /*************************************************************************
- * Function Name: HD44780SetRW
- * Parameters: Boolean Data
- * Return: none
- * Description: Set R/W signal
- *
- *************************************************************************/
- void HD44780SetRW (Boolean Data)
- {
- if(Data)
- {
- IO0SET = 1<<29;
- }
- else
- {
- IO0CLR = 1<<29;
- }
- }
- /*************************************************************************
- * Function Name: HD44780RdIO
- * Parameters: none
- * Return: Int8U
- * Description: Read from HD44780 I/O
- *
- *************************************************************************/
- Int8U HD44780RdIO (void)
- {
- Int8U Data;
- // Set Direction
- IO0DIR &= HD44780_INPUT_SET_MASK;
- HD44780SetRW(1);
- // Read Data
- HD44780SetE(1);
- HD44780_BUS_DLY();
- Data = (IO0PIN >> 10) & 0xF;
- HD44780SetE(0);
- // Clock E
- return Data;
- }
- #endif