/////////////////////////////////////////////////////////////////////////////
// Clear Screen
// IN: -
// OUT: returns < 0 on errors
/////////////////////////////////////////////////////////////////////////////
s32 APP_LCD_Clear(void)
{
s32 error = 0;
u8 x, y;
// use default font
MIOS32_LCD_FontInit((u8 *)GLCD_FONT_NORMAL);
// select all LCDs
error |= MIOS32_LCD_CursorSet(0, 0);
// send data
for(y=0; y<APP_LCD_HEIGHT; y=y+4) {
error |= APP_LCD_GCursorSet(0, y);
MIOS32_BOARD_J15_DataSet(0x00);
MIOS32_BOARD_J15_RS_Set(1); // RS pin used to control DC
for(x=0; x<APP_LCD_WIDTH; ++x){
MIOS32_BOARD_J15_SerDataShift(0x00);
}
}
// set X=0, Y=0
error |= MIOS32_LCD_CursorSet(0, 0);
return error;
}
/////////////////////////////////////////////////////////////////////////////
// Clear Screen
// IN: -
// OUT: returns < 0 on errors
/////////////////////////////////////////////////////////////////////////////
s32 APP_LCD_Clear(void)
{
s32 error = 0;
u8 x, y;
// use default font
MIOS32_LCD_FontInit((u8 *)GLCD_FONT_NORMAL);
// send data
for(y=0; y<8; ++y) {
error |= MIOS32_LCD_CursorSet(0, y);
// select all LCDs
#if APP_LCD_USE_J10_FOR_CS
MIOS32_BOARD_J10_Set(0x00);
#else
MIOS32_BOARD_J15_DataSet(0x00);
#endif
MIOS32_BOARD_J15_RS_Set(1); // RS pin used to control DC
for(x=0; x<128; ++x)
MIOS32_BOARD_J15_SerDataShift(0x00);
}
// set X=0, Y=0
error |= MIOS32_LCD_CursorSet(0, 0);
return error;
}
/////////////////////////////////////////////////////////////////////////////
// Sends data byte to LCD
// IN: data byte in <data>
// OUT: returns < 0 on errors
/////////////////////////////////////////////////////////////////////////////
s32 APP_LCD_Data(u8 data)
{
// select LCD depending on current cursor position
// THIS PART COULD BE CHANGED TO ARRANGE THE 8 DISPLAYS ON ANOTHER WAY
u8 line = mios32_lcd_y / APP_LCD_HEIGHT;
u8 row = (mios32_lcd_x % (2*APP_LCD_WIDTH)) / APP_LCD_WIDTH;
u8 cs = 2*line + row;
if( cs >= 8 )
return -1; // invalid CS line
// chip select and DC
#if APP_LCD_USE_J10_FOR_CS
MIOS32_BOARD_J10_Set(~(1 << cs));
#else
MIOS32_BOARD_J15_DataSet(~(1 << cs));
#endif
MIOS32_BOARD_J15_RS_Set(1); // RS pin used to control DC
// send data
MIOS32_BOARD_J15_SerDataShift(data);
// increment graphical cursor
++mios32_lcd_x;
// if end of display segment reached: set X position of all segments to 0
if( (mios32_lcd_x % APP_LCD_WIDTH) == 0 ) {
APP_LCD_Cmd(0x00); // set X=0
APP_LCD_Cmd(0x10);
}
return 0; // no error
}
/////////////////////////////////////////////////////////////////////////////
// Sends command byte to LCD
// IN: command byte in <cmd>
// OUT: returns < 0 on errors
/////////////////////////////////////////////////////////////////////////////
s32 APP_LCD_Cmd(u8 cmd)
{
// select all LCDs
MIOS32_BOARD_J15_DataSet(0x00);
MIOS32_BOARD_J15_RS_Set(0); // RS pin used to control DC
// send command
MIOS32_BOARD_J15_SerDataShift(cmd);
return 0; // no error
}
/////////////////////////////////////////////////////////////////////////////
// Display-port specific setting of RS
/////////////////////////////////////////////////////////////////////////////
static void RS_Set(u8 level)
{
if (current_lcd_device == 0)
MIOS32_BOARD_J15_RS_Set(level);
else
{
if (level)
lastdata |= 0b00000010;
else
lastdata &= 0b11111101;
MIOS32_BOARD_J15_DataSet(lastdata);
}
}
/////////////////////////////////////////////////////////////////////////////
// Sends command byte to LCD
// IN: command byte in <cmd>
// OUT: returns < 0 on errors
/////////////////////////////////////////////////////////////////////////////
s32 APP_LCD_Cmd(u8 cmd)
{
// select all LCDs
#if APP_LCD_USE_J10_FOR_CS
MIOS32_BOARD_J10_Set(0x00);
#else
MIOS32_BOARD_J15_DataSet(0x00);
#endif
MIOS32_BOARD_J15_RS_Set(0); // RS pin used to control DC
MIOS32_BOARD_J15_SerDataShift(cmd);
return 0; // no error
}
/////////////////////////////////////////////////////////////////////////////
// Initializes application specific VFD driver
// IN: <mode>: optional configuration
// OUT: returns < 0 if initialisation failed
/////////////////////////////////////////////////////////////////////////////
s32 APP_LCD_Init(u32 mode)
{
MIOS32_BOARD_J15_PortInit(APP_LCD_OUTPUT_MODE);
MIOS32_BOARD_J15_RS_Set(0);
MIOS32_BOARD_J15_RW_Set(0);
APP_LCD_Cmd(0b00110011);
APP_LCD_Cmd(0b00110010);
APP_LCD_Cmd(0b00101000); // 4bit, 2 lines
APP_LCD_Cmd(0b00001100); // display on, cursor off, char blinking off
APP_LCD_Cmd(0b00000110); // entry mode
APP_LCD_Cmd(0b00000001); // clear
return 0;
}
/////////////////////////////////////////////////////////////////////////////
// Hack: reinitializes the screens after some time, to clean up
// potentially garbled screens
//
/////////////////////////////////////////////////////////////////////////////
void reinit()
{
mios32_sys_time_t t = MIOS32_SYS_TimeGet();
charcount++;
if (t.seconds > last_reinit_seconds || charcount > 500)
{
charcount = 0;
last_reinit_seconds = t.seconds;
MIOS32_BOARD_J15_RS_Set(0);
MIOS32_BOARD_J15_RW_Set(0);
APP_LCD_Cmd(0b00110011);
APP_LCD_Cmd(0b00110010);
APP_LCD_Cmd(0b00101000); // 4bit, 2 lines
APP_LCD_Cmd(0b00001100); // display on, cursor off, char blinking off
APP_LCD_Cmd(0b00000110); // entry mode
}
}
/////////////////////////////////////////////////////////////////////////////
// Sends data byte to LCD
// IN: data byte in <data>
// OUT: returns < 0 on errors
/////////////////////////////////////////////////////////////////////////////
s32 APP_LCD_Data(u8 data)
{
// select LCD depending on current cursor position
// THIS PART COULD BE CHANGED TO ARRANGE THE 8 DISPLAYS ON ANOTHER WAY
u8 line = 0;
if( mios32_lcd_y >= 3*APP_LCD_HEIGHT )
line = 3;
else if( mios32_lcd_y >= 2*APP_LCD_HEIGHT )
line = 2;
else if( mios32_lcd_y >= 1*APP_LCD_HEIGHT )
line = 1;
u8 row = 0;
if( mios32_lcd_x >= 1*APP_LCD_WIDTH )
row = 1;
u8 cs = 2*line + row;
if( cs >= 8 )
return -1; // invalid CS line
// chip select and DC
MIOS32_BOARD_J15_DataSet(~(1 << cs));
MIOS32_BOARD_J15_RS_Set(1); // RS pin used to control DC
// send data
MIOS32_BOARD_J15_SerDataShift(data);
//MIOS32_DELAY_Wait_uS(40); // exact 10 uS delay
// increment graphical cursor
++mios32_lcd_x;
// if end of display segment reached: set X position of all segments to 0
if( (mios32_lcd_x % APP_LCD_WIDTH) == 0 ) {
APP_LCD_Cmd(0x00); // Set lower nibble to 0
return APP_LCD_Cmd(0x10); // Set upper nibble to 0
}
return 0; // no error
}
