各位大神，我想在uboot启动时在LCD输出字符，目前已经实现，但是输出的字体很小，我想放大字体怎么弄，还有输出的字体周边有一黑框要怎么去掉，以下是自己写LCD代码
omap3Lcd.c文件内容
#include <common.h>
#include <asm/io.h>
#include <asm/arch/mem.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-types.h>
#include <video_fb.h>
#include "omap3Lcd.h"
GraphicDevice glcd_dev;
//static int lcd_static_mem[800][480];
static int lcd_static_mem[1024*1024*2] __attribute__((aligned(0x1000)));
int lcd_ctrl_init(void )
{
u32 l = clkctrl_read_reg(CM_CLKSEL2_PLL);
printf("CLKSEL2_PLL is %d\n",l);
u32 m = clkctrl_read_reg(CM_CLKEN_PLL);
printf("CM_CLLEN_PLL is %d\n",m);
m &= 0xffffff;
m |= (0x7 << 16);//|(0x0f<<20);
clkctrl_write_reg(CM_CLKEN_PLL,m);
// printf("CM_CLLEN_PLL is %d\n",m);
dss_clk_write_reg(CM_CLKSEL_DSS,0x10009);
dss_clk_write_reg(CM_FCLKEN_DSS, 5);
dss_clk_write_reg(CM_ICLKEN_DSS, 1);
dss_clk_write_reg(CM_AUTOIDLE_DSS, 0);
dss_clk_write_reg(CM_SLEEPDEP_DSS,0);
dss_clk_write_reg(CM_CLKSTCTRL_DSS,0);
dss_write_reg(DSS_SYSCONFIG,0x0002);
// dss_write_reg(DSS_CONTROL, 0x00000019);
// dss_write_reg(DSS_SDI_CONTROL, 0x00);
// dss_write_reg(DSS_PLL_CONTROL, 0x00);
while(! dss_read_reg(DSS_SYSSTATUS));
dispc_write_reg(DISPC_SYSCONFIG, 0x2015);
dispc_write_reg(DISPC_CONTROL, 0x00018309 );//change 18309 to 18109 for 16bit per pix
dispc_write_reg(DISPC_SIZE_LCD, 0x01df031f); //size:800*480 0x01df027f-> 0x01df031f
dispc_write_reg(DISPC_CONFIG,0x00000204);
// dispc_write_reg(DISPC_TIMING_H, 0x0720101e); //LCD Timing params
dispc_write_reg(DISPC_TIMING_H, 0x02d0d101);
dispc_write_reg(DISPC_TIMING_V, 0x01401601);
dispc_write_reg(DISPC_POL_FREQ, 0x00);
dispc_write_reg(DISPC_DIVISOR, 0x00010002); //maybe need change
dispc_write_reg(DISPC_DEFAULT_COLOR0, 0xff);
dispc_write_reg(DISPC_TRANS_COLOR0, 0xff);
dispc_write_reg(DISPC_DEFAULT_COLOR1, 0xff);
dispc_write_reg(DISPC_TRANS_COLOR1, 0xff);
dispc_write_reg(DISPC_GFX_SIZE, 0x01df031f);
dispc_write_reg(DISPC_GFX_FIFO_THRESHOLD, 0x03c003ff);
dispc_write_reg(DISPC_GFX_ROW_INC, 0x01);
dispc_write_reg(DISPC_GFX_PIXEL_INC, 0x01);
memset(lcd_static_mem, 0xff, sizeof(lcd_static_mem));
// dispc_write_reg(DISPC_GFX_BA0, 0x8fc00000);
// dispc_write_reg(DISPC_GFX_BA1, 0x8fc00000);
dispc_write_reg(DISPC_GFX_BA0, (unsigned int )lcd_static_mem);
dispc_write_reg(DISPC_GFX_BA1, (unsigned int )lcd_static_mem + 800*480*4);
// dispc_write_reg(DISPC_GFX_BA0, LCD_STATIC_MEM);
dispc_write_reg(DISPC_GFX_POSITION, 0);
dispc_write_reg(DISPC_GFX_ATTRIBUTES, 0x00000091); //change for GFX configuration 0x02d 0x00000091
// dispc_write_reg(DISPC_GFX_ATTRIBUTES, 0x02d);
// dispc_write_reg(DISPC_CONTROL, 0x00018129);
int r = dispc_read_reg(DISPC_CONTROL);
if (!(r & 1)) {
printf("lcd is not enable\n");
}
if (r & (1<<5)) {
printf("lcd is going\n");
}
r |= (1<<5);
dispc_write_reg(DISPC_CONTROL, r);
// dispc_write_reg(DISPC_CONTROL, 0x00018309);