1788使用AT070TN83屏的问题
老感觉是接触不良是的,手动一下背面就显示,为什么啊,都换了三个屏测试了,是时序的问题吗,,这是程序代码
LPC_LCD->TIMH = (HBP << 24) | /*ÉèÖÃˮƽºóÑØ */
(HFP << 16) | /*ÉèÖÃˮƽǰÑØ */
(HSW << 8)| /*ÉèÖÃˮƽͬ²½Âö¿í */
(PPL << 2); /*ÉèÖÃÿÐÐÓÐ800¸öÏñËصã */
LPC_LCD->TIMV = (VBP << 24) | /*ÉèÖô¹Ö±ºóÑØ */
(VFP << 16) | /*ÉèÖô¹Ö±Ç°ÑØ */
(VSW << 10) | /*ÉèÖô¹Ö±Í¬²½Âö¿í */
(LPP << 0); /*ÿÆÁÓÐ480ÐÐ */
LPC_LCD->POL = (1 << 26) | /*ÅÔ·ʱÖÓ·ÖƵÆ÷r */
(CPL << 16) | /*ÿÐÐ800¸öʱÖÓÂö³å */
(0 << 14) | /*LCDENAB Êä³ö¸ßµçƽÓÐЧ */
(1 << 13) | /*Êý¾ÝÔÚLCDDCLKµÄϽµÑØÊä³ö */
(1 << 12) | /*HSYNC µÍµçƽÓÐЧ */
(1 << 11) | /*VSYNC µÍµçƽÓÐЧ */
(0 << 5); /*Ñ¡Ôñ HCLK */
LPC_LCD->CTRL = (BGR<<8) | /*ºìÉ«ºÍÀ¶É«½»»»Î»Öà */
(LcdTFT << 5)| /*Ñ¡Ôñ TFT ÀàÐ͵ÄLCD */
(LcdBpp << 1)| /*select 16bpp */
(LcdEn); /*ʹÄÜLCD¿ØÖÆÐźŠ*/
我碰到过类似情况,用的是网上买的翻修屏(就是价格便宜的),后来换正品的就好了
#define PPL 800 // Pixels per line
#define HSW 1 // HSYNC pulse width, can be 1-48
#define HFP 40 // Horizontal front porch, MUST be 40
#define HBP 88 // Horizontal back porch, MUST be 88
#define LPP 480 // Lines per panel
#define VSW 3 // VSYNC pulse width, MSUT be 3
#define VFP 3 // Vertical front porch, 1,3ÊÇ¿ÉÒÔµÄ
#define VBP 3 // Vertical back porch, °´ÕÕdatasheet¸ø³öµÄ32·´¶øÓÐÎÊÌ⣡1,3ÊÇ¿ÉÒÔµÄ
#define ACB 1 // AC bias frequency (not used)
#define IVS 1 // ? Invert VSYNC
#define IHS 1 // ? Invert HSYNC
#define IPC 1 // ? Invert panel clock
#define CPL PPL // Clock per line (identical to pixels per line)
#define BPP 6 // Bits per pixel b110 = 16 bpp 5:6:5 mode
#define BGR 1 // Swap red and blue
#define LCDTFT 1 // LCD TFT panel
#define OPT_CLK 28500000 // Optimal clock rate (Hz) between 1-8.22 MHz according to SSD1289 datasheet */
MATRIX_ARB = 0 // Set AHB Matrix priorities with 3 being highest priority
| (1 <<0)// PRI_ICODE : I-Code bus priority. Should be lower than PRI_DCODE for proper operation.
| (2 <<2)// PRI_DCODE : D-Code bus priority.
| (0 <<4)// PRI_SYS : System bus priority.
| (0 <<6)// PRI_GPDMA : General Purpose DMA controller priority.
| (0 <<8)// PRI_ETH : Ethernet: DMA priority.
| (3 << 10)// PRI_LCD : LCD DMA priority.
| (0 << 12)// PRI_USB : USB DMA priority.
;
//
//
// Init LCDC
//
LPC_SC->PCONP |=(1UL << 0);// Power the LCDC
LPC_LCD->CTRL &= ~(1UL << 0);// Disable the LCDC
LPC_LCD->TIMH= 0 // Configure horizontal axis
| (((PPL / 16) - 1) <<2)
| ((HSW - 1) <<8)
| ((HFP - 1) << 16)
| ((HBP - 1) << 24)
;
LPC_LCD->TIMV= 0 // Configure vertical axis
| ((LPP - 1) <<0)
| ((VSW - 1) << 10)
| ((VFP) << 16)
| ((VBP) << 24)
;
LPC_LCD->POL = 0 // Configure clock and signal polarity
| (_FindClockDivisor(OPT_CLK) <<0)
| ((ACB - 1) <<6)
| ((IVS) << 11)
| ((IHS) << 12)
| ((IPC) << 13)
| ((CPL - 1) << 16)
;
LPC_LCD->CTRL= 0 // Configure operating mode and panel parameters
| (BPP << 1)
| (BGR << 8)
| (LCDTFT << 5)
;
for (i = 0; i < GUI_COUNTOF(LPC_LCD->PAL); i++) {
LPC_LCD->PAL = 0;// Clear the color palette with black
}
LPC_SC->LCD_CFG = 0x0;// No panel clock prescaler
//
// Enable LCDC
//
LPC_LCD->UPBASE= VRAM_ADDR_PHYS;
LPC_LCD->CTRL |= (1 <<0); // Enable LCD signals
LPC_LCD->CTRL |= (1 << 11); // Enable LCD power
LPC_GPIO2->SET|= (1 << LCD_BACKLIGHT_BIT);// Set backlight to on
} sea_star 发表于 2014-2-22 10:21
#define PPL 800 // Pixels per line
#define HSW 1 // HSYN ...
之前买过二个都不行,后期又买了一个,也是这问题,这个屏不是很稳定的吗,方便加个QQ不,好好向你请教一下,707851861 LPC_SC->LCD_CFG = 0x0;// No panel clock prescaler
你这时钟分频为0 LCD时钟频率120???? 我们的1788驱动AT070TN83,AT070TN94都可以了 xi_liang 发表于 2014-5-14 15:17
我们的1788驱动AT070TN83,AT070TN94都可以了
你们的RST复位电路画的MAX811,实际用的是812.。。。。。
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