/* Initialize LCD in memory mapped mode and touch panel */
void LCD_InitializeLCD(void)
{ TOUCH_Config_TypeDef touch_init = TOUCH_INIT_DEFAULT;
int i;
/* If we are in BC_UIF_AEM_EFM state, we can redraw graphics */
if (BSP_RegisterRead(&BC_REGISTER->UIF_AEM) == BC_UIF_AEM_EFM)
{
/* If we're not BC_ARB_CTRL_EBI state, we need to reconfigure display controller */
if ((BSP_RegisterRead(&BC_REGISTER->ARB_CTRL) != BC_ARB_CTRL_EBI) || runOnce)
{
/* Configure for EBI mode and reset display */
BSP_DisplayControl(BSP_Display_EBI);
BSP_DisplayControl(BSP_Display_ResetAssert);
BSP_DisplayControl(BSP_Display_PowerDisable);
/* Short delay */
for (i = 0; i < 10000; i++) ;
/* Configure display for Direct Drive + SPI mode */
BSP_DisplayControl(BSP_Display_Mode8080);
BSP_DisplayControl(BSP_Display_PowerEnable);
BSP_DisplayControl(BSP_Display_ResetRelease);
runOnce = false;
}
}
touch_init.oversampling = adcOvsRateSel32;
TOUCH_Init(&touch_init);
TOUCH_RegisterUpcall(LCD_TOUCH_Upcall);
}
/* Initialize LCD in Direct mode and touch panel */
void LCD_InitializeLCD(void)
{ TOUCH_Config_TypeDef touch_init = TOUCH_INIT_DEFAULT;
TFT_DirectInit(&tftInit);
_SetVRAMAddr((void *)(VRAM_pointer + EBI_BankAddress(EBI_BANK2)));
_SetOrg(orgx, orgy);
/* Initialize touch panel driver and register upcall function */
TOUCH_Init(&touch_init);
TOUCH_RegisterUpcall(LCD_TOUCH_Upcall);
}
/**************************************************************************//**
* @brief Main function
*****************************************************************************/
int main(void)
{
uint32_t buttons;
POINT P[ 3 ];
TOUCH_Config_TypeDef touch_config = TOUCH_INIT_DEFAULT;
const char readmeText[] = \
"USB Bitmap transfer using USB drive functionality.\r\n\r\n"\
"This example demonstrate use several functionalities:\r\n"\
"1. Creation of virtual drive in system with FAT FS,\r\n"\
"2. Mounting the drive on PC and file transfer,\r\n"\
"3. Bitmap file creation based on TFT frame buffer content,\r\n"\
"4. Resistive touch panel interaction.\r\n\r\n"\
"On system startup initial drive is created and\r\n"\
"formatted using FAT FS then simple readme.txt file\r\n"\
"is put on file system. Every time user press PB4 key\r\n"\
"new file, containing TFT frame buffer in bitmap format\r\n"\
"is added. All files could be retrieved after connecting\r\n"\
"board to PC by means of USB. For this connection use\r\n"\
"small USB socket located on Leopard Gecko CPU board, not\r\n"\
"the big one on development kit.\r\n\r\n"\
"If new files doesn't appear on drive after pressing PB4,\r\n"\
"try to reconnect the board to PC.\r\n\r\n"\
"Board: Energy Micro EFM32LG-DK3650 Development Kit\r\n"\
"Device: EFM32LG990F256\r\n";
/* Configure for 48MHz HFXO operation of core clock */
CMU_ClockSelectSet(cmuClock_HF, cmuSelect_HFXO);
/* Initialize DK board register access */
BSP_Init(BSP_INIT_DEFAULT);
/* If first word of user data page is non-zero, enable eA Profiler trace */
BSP_TraceProfilerSetup();
CMU_ClockEnable(cmuClock_GPIO, true);
CMU_ClockEnable( cmuClock_ADC0, true);
/* Set frame buffer start address */
frameBuffer = (uint16_t *) EBI_BankAddress(EBI_BANK2);
/* Make sure CYCCNT is running, needed by delay functions. */
DWT_CTRL |= 1;
/* Initialize USB subsystem and prepare for taking pictures */
BITMAP_Init();
/* Create our first file on disk - simple readme */
BITMAP_CreateFileAndSaveData("README.TXT", readmeText, sizeof(readmeText));
/* Indicate we are waiting for AEM button state enabling EFM */
while (BSP_RegisterRead(&BC_REGISTER->UIF_AEM) != BC_UIF_AEM_EFM)
{
/* Show a short "strobe light" on DK LEDs, indicating wait */
BSP_LedsSet(0x8001);
delayMs(100);
BSP_LedsSet(0x4002);
delayMs(100);
}
touch_config.frequency = 13000000; /* use max ADC frequency */
touch_config.ignore = 0; /* notice every move, even 1 pixel */
TOUCH_Init(&touch_config);
/* Initialize touch screen calibration factor matrix with approx. values */
setCalibrationMatrix( (POINT*)&lcdCalibPoints, /* Display coordinates */
(POINT*)&touchCalibPoints, /* Touch coordinates */
&calibFactors ); /* Calibration factor matrix */
while (1)
{
delayMs(100);
if ( TFT_DirectInit(&tftInit) )
{
delayMs(100);
displayHelpScreen();
BSP_LedsSet(0x0000);
BSP_PeripheralAccess(BSP_TOUCH, true);
GPIO_PinModeSet(LCD_TOUCH_X1, gpioModeInput, 0);
GPIO_PinModeSet(LCD_TOUCH_X2, gpioModeInput, 0);
GPIO_PinModeSet(LCD_TOUCH_Y1, gpioModeInput, 0);
GPIO_PinModeSet(LCD_TOUCH_Y2, gpioModeInput, 0);
do
{
delayMs(25);
buttons = readButtons();
/* Draw on screen */
if ( buttons & BC_UIF_PB1 )
{
memset( frameBuffer, BLACK, 2 * WIDTH * HEIGHT ); /* Clear screen */
do
{ TOUCH_Pos_TypeDef *pos = TOUCH_GetPos();
if ( pos->pen )
drawPixel( pos->x, pos->y, COLOR );
delayMs(1);
buttons = readButtons() & ~BC_UIF_PB1;
if(buttons == BC_UIF_PB4)
{
getNicePicture();
buttons &= ~BC_UIF_PB4;
}
} while ( buttons == 0 );
}
/* Calibrate touch screen */
else if ( buttons & BC_UIF_PB2 )
{
memset( frameBuffer, BLACK, 2 * WIDTH * HEIGHT ); /* Clear screen */
drawCross( lcdCalibPoints[ 0 ].x, lcdCalibPoints[ 0 ].y, COLOR );
TFT_DrawString(30, 35, "Tap green marker" );
P[ 0 ] = getTouchTapSample10bit();
memset( frameBuffer, BLACK, 2 * WIDTH * HEIGHT ); /* Clear screen */
drawCross( lcdCalibPoints[ 1 ].x, lcdCalibPoints[ 1 ].y, COLOR );
TFT_DrawString(40, 130, "Tap green marker" );
P[ 1 ] = getTouchTapSample10bit();
memset( frameBuffer, BLACK, 2 * WIDTH * HEIGHT ); /* Clear screen */
drawCross( lcdCalibPoints[ 2 ].x, lcdCalibPoints[ 2 ].y, COLOR );
TFT_DrawString(20, 180, "Tap green marker" );
P[ 2 ] = getTouchTapSample10bit();
TOUCH_CalibrationTable((POINT*)&lcdCalibPoints,/* Display coordinates*/
&P[0]); /* Touch coordinates */
memset( frameBuffer, BLACK, 2 * WIDTH * HEIGHT ); /* Clear screen */
TFT_DrawString(10, 100, "The touch screen is" );
TFT_DrawString(30, 130, "now calibrated !" );
}
/* Display help screen */
else if ( buttons & BC_UIF_PB3 )
{
displayHelpScreen();
while ( readButtons() & BC_UIF_PB3 )
delayMs(50);
} else if( buttons & BC_UIF_PB4 )
{
getNicePicture();
}
} while ( ( buttons & EXIT_LOOP ) == 0 );
}
else
{
BSP_LedsSet(0x8001);
delayMs(100);
BSP_LedsSet(0x4002);
}
}
}
