/**************************************************************************//**
* @brief LCD Initialization routine for EFM32 DVK display
* @param lcd Pointer to LCD register block
*****************************************************************************/
void LCD_Init(LCD_TypeDef *lcd)
{
CMU_TypeDef *cmu = CMU;
/* Enable LFXO oscillator */
cmu->OSCENCMD |= CMU_OSCENCMD_LFXOEN;
while (!(cmu->STATUS & CMU_STATUS_LFXORDY)) ;
/* Enable LCD clock in CMU */
cmu->LFACLKEN0 |= CMU_LFACLKEN0_LCD;
/* Select LFXO for LCD */
cmu->LFCLKSEL = CMU_LFCLKSEL_LFA_LFXO | CMU_LFCLKSEL_LFB_LFXO;
/* LCD Controller Prescaler (divide by 1) */
/* CLKlcd = 0.25 kHz */
cmu->LFAPRESC0 &= ~_CMU_LFAPRESC0_LCD_MASK;
cmu->LFAPRESC0 |= _CMU_LFAPRESC0_LCD_DIV128 << _CMU_LFAPRESC0_LCD_SHIFT;
/* Set up interrupt handler */
lcd->IEN = 0;
while (lcd->SYNCBUSY) ;
/* Clear pending interrupts */
lcd->IFC = ~0;
/* Enable interrupt */
NVIC_EnableIRQ(LCD_IRQn);
lcd->IEN = LCD_IEN_FC;
/* Frame rate is 32Hz, 0.25Khz LFCLK128, QUADRUPLEX mode, FDIV=0 */
lcd->DISPCTRL = LCD_DISPCTRL_MUX_QUADRUPLEX |
LCD_DISPCTRL_BIAS_ONETHIRD |
LCD_DISPCTRL_WAVE_LOWPOWER |
LCD_DISPCTRL_CONLEV_MAX |
LCD_DISPCTRL_VLCDSEL_VDD |
LCD_DISPCTRL_VBLEV_3V00;
/* No voltage boost, framerate 32Hz */
cmu->LCDCTRL = 0;
/* Turn all segments off */
LCD_AllOff(lcd);
/* Enable all segment registers */
lcd->SEGEN = 0x000003FF;
lcd->CTRL = LCD_CTRL_EN | LCD_CTRL_UDCTRL_FRAMESTART;
while (lcd->SYNCBUSY) ;
/* Configure LCD to give a frame counter interrupt every 8th frame. */
lcd->BACTRL = LCD_BACTRL_FCEN | (7 << _LCD_BACTRL_FCTOP_SHIFT) | (0 << _LCD_BACTRL_FCPRESC_SHIFT);
while (lcd->SYNCBUSY) ;
lcd->IFC = LCD_IFC_FC;
lcd->IEN = LCD_IEN_FC;
}
void vLCDTask( void *pvParameters )
{
long x;
LCD_TypeDef *xLCD = LCD;
char *pcScrollText = "FreeRTOS Energy Micro ";
/* Loop through various different displays. */
for( ;; )
{
/* Start by scrolling some text. */
LCD_ScrollText( xLCD, pcScrollText );
LCD_AllOff( xLCD );
/* Count down from 100 on the number section of the LCD display. */
for( x = 100; x > 0; x--)
{
LCD_Number( xLCD, x );
vTaskDelay( 10 );
}
LCD_NumberOff( xLCD );
/* Turn on gecko and EFM32 symbol. */
LCD_Symbol( xLCD, LCD_SYMBOL_GECKO, 1 );
LCD_Symbol( xLCD, LCD_SYMBOL_EFM32, 1 );
LCD_Write( xLCD, " Gecko " );
vTaskDelay( lcdONE_SECOND );
LCD_AllOn( xLCD);
vTaskDelay( lcdONE_SECOND );
LCD_AllOff( xLCD);
LCD_Write( xLCD, "OOOOOOO" );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, "XXXXXXX" );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, "+++++++" );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, "@@@@@@@" );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, "ENERGY " );
vTaskDelay( lcdQUARTER_SECOND );
LCD_Write( xLCD, "@@ERGY " );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, " @@RGY " );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, " M@@GY " );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, " MI@@Y " );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, " MIC@@ " );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, " MICR@@" );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, " MICRO@" );
vTaskDelay( lcdSHORT_DELAY );
LCD_Write( xLCD, " MICRO " );
vTaskDelay( lcdQUARTER_SECOND );
LCD_Write( xLCD, "-EFM32-" );
vTaskDelay( lcdQUARTER_SECOND );
}
}
