/**************************************************************************//**
* @brief TFT initialize or reinitialize
* Assumes EBI has been configured correctly in BSP_Init(BSP_INIT_DK_EBI)
*
* @param[in] tftInit Pointer to EBI TFT initialization structure
*
* @return true if we should redraw into buffer, false if BC has control
* over display
*****************************************************************************/
bool TFT_DirectInit(const EBI_TFTInit_TypeDef *tftInit)
{
bool ret;
uint32_t i, freq;
EMSTATUS stat;
/* 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)
{
/* Enable SSD2119 Serial Port Interface */
BSP_PeripheralAccess(BSP_TFT, true);
/* Enable EBI mode of operation on SSD2119 controller */
BSP_DisplayControl(BSP_Display_EBI);
BSP_DisplayControl(BSP_Display_ResetAssert);
BSP_DisplayControl(BSP_Display_PowerDisable);
freq = SystemCoreClockGet();
for (i = 0; i < (freq / 100); i++)
{
__NOP();
}
/* Configure display for Direct Drive "Mode Generic" + 3-wire SPI mode */
BSP_DisplayControl(BSP_Display_ModeGeneric);
BSP_DisplayControl(BSP_Display_PowerEnable);
BSP_DisplayControl(BSP_Display_ResetRelease);
/* Configure GPIO for EBI and TFT */
TFT_DirectGPIOConfig();
/* Initialize display */
stat = DMD_init(0);
if (DMD_OK == stat) stat = DMD_selectFramebuffer((void*)EBI_BankAddress(EBI_BANK2));
if (DMD_OK != stat) while (1) ;
/* Configure EBI TFT direct drive */
EBI_TFTInit(tftInit);
runOnce = false;
}
ret = true;
}
else
{
ret = false;
}
return ret;
}
/***************************************************************************//**
* @brief
* Initialize LCD device
*
* @details
*
* @note
*
******************************************************************************/
void efm32_spiLcd_init(void)
{
struct efm32_usart_device_t *usart;
rt_uint32_t flag;
DMD_DisplayGeometry *geometry;
rt_uint32_t ret;
do
{
USART_InitSync_TypeDef init = USART_INITSYNC_DEFAULT;
/* Find SPI device */
lcd = rt_device_find(LCD_USING_DEVICE_NAME);
if (lcd == RT_NULL)
{
lcd_debug("LCD err: Can't find %s!\n", LCD_USING_DEVICE_NAME);
break;
}
lcd_debug("LCD: Find device %s\n", LCD_USING_DEVICE_NAME);
/* Config CS pin */
usart = (struct efm32_usart_device_t *)(lcd->user_data);
if (!(usart->state & USART_STATE_AUTOCS))
{
GPIO_PinModeSet(LCD_CS_PORT, LCD_CS_PIN, gpioModePushPull, 1);
lcdAutoCs = false;
}
/* TFT initialize or reinitialize. Assumes EBI has been configured
correctly in DVK_init(DVK_Init_EBI) */
rt_uint32_t freq = SystemCoreClockGet();
rt_uint32_t i;
rt_bool_t warning = RT_FALSE;
/* If we are in BC_UIF_AEM_EFM state, we can redraw graphics */
while (DVK_readRegister(&BC_REGISTER->UIF_AEM) != BC_UIF_AEM_EFM)
{
if (!warning)
{
lcd_debug("LCD: Please press AEM button!!!\n");
warning = RT_TRUE;
}
}
lcd_debug("LCD: Got LCD control\n");
/* If we're not BC_ARB_CTRL_EBI state, we need to reconfigure display controller */
if (DVK_readRegister(&BC_REGISTER->ARB_CTRL) != BC_ARB_CTRL_EBI)
{
lcd_debug("LCD: Set to EBI mode\n");
/* Configure for EBI mode and reset display */
DVK_displayControl(DVK_Display_EBI);
DVK_displayControl(DVK_Display_ResetAssert);
DVK_displayControl(DVK_Display_PowerDisable);
/* Short delay */
freq = SystemCoreClockGet();
for(i = 0; i < (freq / 100); i++)
{
__NOP();
}
#if defined(LCD_MAPPED)
/* Configure display for address mapped method + 3-wire SPI mode */
DVK_displayControl(DVK_Display_Mode8080);
DVK_displayControl(DVK_Display_PowerEnable);
DVK_displayControl(DVK_Display_ResetRelease);
/* Initialize graphics - abort on failure */
ret = DMD_init(BC_SSD2119_BASE, BC_SSD2119_BASE + 2);
if (ret == DMD_OK)
{
/* Make sure display is configured with correct rotation */
DMD_flipDisplay(1, 1);
}
else if (ret != DMD_ERROR_DRIVER_ALREADY_INITIALIZED)
{
lcd_debug("LCD err: driver init failed %x\n", ret);
break;
}
#elif defined(LCD_DIRECT)
/* Configure TFT direct drive method from EBI BANK2 */
const EBI_TFTInit_TypeDef tftInit =
{
ebiTFTBank2, /* Select EBI Bank 2 */
ebiTFTWidthHalfWord, /* Select 2-byte (16-bit RGB565) increments */
ebiTFTColorSrcMem, /* Use memory as source for mask/blending */
ebiTFTInterleaveUnlimited, /* Unlimited interleaved accesses */
ebiTFTFrameBufTriggerVSync, /* VSYNC as frame buffer update trigger */
false, /* Drive DCLK from negative edge of internal clock */
ebiTFTMBDisabled, /* No masking and alpha blending enabled */
ebiTFTDDModeExternal, /* Drive from external memory */
ebiActiveLow, /* CS Active Low polarity */
ebiActiveHigh, /* DCLK Active High polarity */
ebiActiveLow, /* DATAEN Active Low polarity */
ebiActiveLow, /* HSYNC Active Low polarity */
ebiActiveLow, /* VSYNC Active Low polarity */
320, /* Horizontal size in pixels */
1, /* Horizontal Front Porch */
30, /* Horizontal Back Porch */
2, /* Horizontal Synchronization Pulse Width */
240, /* Vertical size in pixels */
1, /* Vertical Front Porch */
4, /* Vertical Back Porch */
2, /* Vertical Synchronization Pulse Width */
0x0000, /* Frame Address pointer offset to EBI memory base */
4, /* DCLK Period */
0, /* DCLK Start cycles */
0, /* DCLK Setup cycles */
0, /* DCLK Hold cycles */
};
DVK_enablePeripheral(DVK_TFT);
/* Configure display for Direct Drive + 3-wire SPI mode */
DVK_displayControl(DVK_Display_ModeGeneric);
DVK_displayControl(DVK_Display_PowerEnable);
DVK_displayControl(DVK_Display_ResetRelease);
/* Configure GPIO for EBI and TFT */
/* EBI TFT DCLK/Dot Clock */
GPIO_PinModeSet(gpioPortA, 8, gpioModePushPull, 0);
/* EBI TFT DATAEN */
GPIO_PinModeSet(gpioPortA, 9, gpioModePushPull, 0);
/* EBI TFT VSYNC */
GPIO_PinModeSet(gpioPortA, 10, gpioModePushPull, 0);
/* EBI TFT HSYNC */
GPIO_PinModeSet(gpioPortA, 11, gpioModePushPull, 0);
/* Initialize display */
DMD_init(0, (rt_uint32_t)EBI_BankAddress(EBI_BANK2));
/* Configure EBI TFT direct drive */
EBI_TFTInit(&tftInit);
#endif
}
/* Get LCD geometry */
ret = DMD_getDisplayGeometry(&geometry);
if (ret != DMD_OK)
{
lcd_debug("LCD err: get geometry failed!\n");
break;
}
/* Init LCD info */
flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_DMA_TX;
lcd_info.pixel_format = RTGRAPHIC_PIXEL_FORMAT_RGB565P;
lcd_info.bits_per_pixel = 16;
lcd_info.width = geometry->xSize;
lcd_info.height = geometry->ySize;
#if defined(LCD_MAPPED)
lcd_info.framebuffer = RT_NULL;
efm32_spiLcd_register(&lcd_device, LCD_DEVICE_NAME, flag, (void *)&lcd_ops);
#elif defined(LCD_DIRECT)
lcd_info.framebuffer = (rt_uint8_t *)EBI_BankAddress(EBI_BANK2);
efm32_spiLcd_register(&lcd_device, LCD_DEVICE_NAME, flag, RT_NULL);
#endif
/* Set clipping area */
ret = DMD_setClippingArea(0, 0, geometry->xSize, geometry->ySize);
if (ret != DMD_OK)
{
lcd_debug("LCD err: set clipping area failed!\n");
break;
}
/* Read device code */
rt_uint16_t code = 0xFFFF;
#if defined(LCD_MAPPED)
code = DMDIF_readDeviceCode();
#endif
/* Set as rtgui graphic driver */
rtgui_graphic_set_device(&lcd_device);
lcd_debug("LCD: H/W init OK!\n");
return;
} while(0);
lcd_debug("LCD err: H/W init failed!\n");
}
