Hi,
Board with a RGB666 LCD screen.
When not in use PIXC, images can be displayed properly .
Such a data stream is：MEM(RGB888)->DMA->EPPI-->LCD(RGB666)
EPPI and DMA configuration is as follows :
//These parameters from the data sheet of the LCD screen .
/* Active pixels per line */
#define LCD_ACTIVE_PIXELS_PER_LINE 640//480u
/* Active lines per frame */
#define LCD_ACTIVE_LINES_PER_FRAME 480//272u
/* Number of Horizontal front porch clocks */
#define LCD_HFRONT_PORCH 16//2u
/* Number of Horizontal back porch clocks */
#define LCD_HBACK_PORCH 48//2u
/* Horizontal pulse width */
#define LCD_HPULSE_WIDTH 96//41u
/* Number of vertical front porch (in terms of lines) */
#define LCD_VFRONT_PORCH 10u//2u
/* Number of back porch (in terms of lines) */
#define LCD_VBACK_PORCH 33u//2u
/* Vertical pulse width (in terms of lines) */
#define LCD_VPULSE_WIDTH 2u//10u
/* Vertical pulse width (in terms of lines) */
#define LCD_HPERIOD 800//525u
/* Vertical pulse width (in terms of lines) */
#define LCD_VPERIOD 525u//286u
#define LCD_PIXELS_WIDTH LCD_ACTIVE_PIXELS_PER_LINE
#define LCD_PIXELS_HEIGHT LCD_ACTIVE_LINES_PER_FRAME
#define LCD_PIXELS_DEPTH 3 //Color depth (RGB888)
#define LCD_PIXELS_SIZE (LCD_PIXELS_WIDTH*LCD_PIXELS_HEIGHT*LCD_PIXELS_DEPTH)
void InitEPPI1(void)
{
*pREG_EPPI1_CTL = ENUM_EPPI_CTL_TXMODE |
ENUM_EPPI_CTL_NON656 |
ENUM_EPPI_CTL_SYNC2 |
ENUM_EPPI_CTL_INTCLK |
ENUM_EPPI_CTL_INTFS |
ENUM_EPPI_CTL_PACK_EN |
ENUM_EPPI_CTL_POLC00 |
ENUM_EPPI_CTL_FS1LO_FS2LO |
ENUM_EPPI_CTL_RGBFMT_EN |
ENUM_EPPI_CTL_ZEROFILL |
ENUM_EPPI_CTL_DLEN18; //RGB666
*pREG_EPPI1_CLKDIV = 0X3;
*pREG_EPPI1_LINE = LCD_HPERIOD;
*pREG_EPPI1_FRAME = LCD_VPERIOD;
*pREG_EPPI1_HCNT = LCD_ACTIVE_PIXELS_PER_LINE;
*pREG_EPPI1_VCNT = LCD_ACTIVE_LINES_PER_FRAME;
*pREG_EPPI1_FS1_WLHB = LCD_HPULSE_WIDTH;
*pREG_EPPI1_FS1_PASPL = LCD_HPERIOD;
*pREG_EPPI1_FS2_WLVB = LCD_HPERIOD * LCD_VPULSE_WIDTH;
*pREG_EPPI1_FS2_PALPF = LCD_HPERIOD * LCD_VPERIOD;
*pREG_EPPI1_HDLY = LCD_HPULSE_WIDTH + LCD_HBACK_PORCH-1;
*pREG_EPPI1_VDLY = LCD_VPULSE_WIDTH + LCD_VBACK_PORCH;
}
void InitDMA(void)
{
*pREG_DMA33_ADDRSTART = gpLcdDisplayBuf;
*pREG_DMA33_XCNT = LCD_PIXELS_WIDTH*LCD_PIXELS_DEPTH/4;
*pREG_DMA33_XMOD = 4;
*pREG_DMA33_YCNT = LCD_PIXELS_HEIGHT;
*pREG_DMA33_YMOD = 4;
*pREG_DMA33_CFG = ENUM_DMA_CFG_MSIZE04 |
ENUM_DMA_CFG_PSIZE04 |
ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_SYNC |
ENUM_DMA_CFG_STOP|
ENUM_DMA_CFG_YCNT_INT;
//ENUM_DMA_CFG_AUTO;
}
Original image :
But when the EPPI sent via VID connected to PIXC, LCD screen image is 9 points .
Data flow is this: MEM(UYVY422)-->DMA-->PIXC(UYVY->RGB888)-->EPPI-->LCD(RGB666)
The image is scaled and displayed nine .
void osd_Vss_cfg(void)
{
*pREG_VID0_CONN = 0x00001000; //PIXC_TX->EPPI1_TX
ssync();
}
void InitPixc(void)
{
//UYVY to RGB888 OVERLAY is RGB
*pREG_PIXC0_CONRY = 0x4002CC80;
*pREG_PIXC0_CONGU = 0x7D4E9480;
*pREG_PIXC0_CONBV = 0x4E200080;
*pREG_PIXC0_CCBIAS = 0x31E21F4D;
*pREG_PIXC0_PPL = VIDEO_IN_WIDTH;
*pREG_PIXC0_LPF = VIDEO_IN_HEIGHT;
*pREG_PIXC0_CTL = (uint32_t)(
//BITM_PIXC_CTL_OVENA |
BITM_PIXC_CTL_OVFRMT | //RGB
BITM_PIXC_CTL_ENTC
); //半透明
ssync();
*pREG_PIXC0_HSTART_A = 0u;
*pREG_PIXC0_HEND_A = (uint16_t)OVERLAY_WIDTH;
ssync();
*pREG_PIXC0_VSTART_A = 0;
*pREG_PIXC0_VEND_A = (uint16_t)OVERLAY_HEIGHT;
ssync();
*pREG_PIXC0_TRANSP_A = 15;//TranspRatio;
ssync();
*pREG_PIXC0_TC = 0x070707;//0x00000000;//0x070707;
ssync();
}
//pixc input
void InitDMA35(void)
{
*pREG_DMA35_ADDRSTART = goVideoInBuf[1];
ssync();
*pREG_DMA35_XCNT = LCD_PIXELS_WIDTH*2/4;
*pREG_DMA35_XMOD = 4;
*pREG_DMA35_YCNT = LCD_PIXELS_HEIGHT;
*pREG_DMA35_YMOD = (720-640)*2+4; //window 720x576 -> 640*480
*pREG_DMA35_CFG = (uint32_t)(ENUM_DMA_CFG_ADDR2D |
ENUM_DMA_CFG_STOP |
ENUM_DMA_CFG_SYNC |
ENUM_DMA_CFG_MSIZE04 |
ENUM_DMA_CFG_PSIZE04 |
ENUM_DMA_CFG_READ);
ssync();
}