AT91SAM9260下的U-Boot移植和添加LCD驱动支持
第一步:从http://www.denx.de/wiki/U-Boot/SourceCode网站下载u-boot-2008.10.tar.bz2这个文件。
第二步:建立自己的交叉编译环境,我用的是arm-none-linux-gnueabi-,可以从这里下载最新的交叉编译器。建立的系统为fedora 16。设置好交叉编译环境变量。一般觉得export命令来设置会比较好用,有的会提供修改profile的方式和bash的方式。本人认为还是动态设置比较好。
第三步:首先用make disclean命令清除以前编译的u-boot.bin文件。接着用make at91sam9261ek_config命令来配置好编译的目标。
第四步:用vim Makefile命令,修改
ifeq ($(ARCH),arm)CROSS_COMPILE = arm-linux- 改为 arm-none-linux-guneabi-endif第五步:编译,make
如果编译通过会生成 u-boot.bin文件
第六步:移植LCD 显示驱动:
需要修改LCD时序参数,以适合本站的竖屏。
u-boot-2008.10\board\atmel\at91sam9261ek\at91sam9261ek.c: 修改结构体:
vidinfo_t panel_info = {vl_col:240,vl_row:320,vl_clk:4965000,vl_sync:ATMEL_LCDC_INVLINE_INVERTED |ATMEL_LCDC_INVFRAME_INVERTED,vl_bpix:3,vl_tft:1,vl_hsync_len:5,vl_left_margin:1,vl_right_margin:33,vl_vsync_len:1,vl_upper_margin:1,vl_lower_margin:0,mmio:AT91SAM9261_LCDC_BASE,};然后修改为:
vidinfo_t panel_info = {vl_col:480,vl_row:272,vl_clk:9000000,vl_sync:ATMEL_LCDC_INVLINE_INVERTED |ATMEL_LCDC_INVFRAME_INVERTED,vl_bpix:3,vl_tft:1,vl_hsync_len:41,vl_left_margin:2,vl_right_margin:2,vl_vsync_len:10,vl_upper_margin:2,vl_lower_margin:2,mmio:AT91SAM9261_LCDC_BASE,};修改完后,下面还需要修改:
at91_set_A_periph(AT91_PIN_PB1, 0); /* LCDHSYNC */ at91_set_A_periph(AT91_PIN_PB2, 0); /* LCDDOTCK */ at91_set_A_periph(AT91_PIN_PB3, 0); /* LCDDEN */ at91_set_A_periph(AT91_PIN_PB4, 0); /* LCDCC */ at91_set_A_periph(AT91_PIN_PB7, 0); /* LCDD2 */ at91_set_A_periph(AT91_PIN_PB8, 0); /* LCDD3 */ at91_set_A_periph(AT91_PIN_PB9, 0); /* LCDD4 */ at91_set_A_periph(AT91_PIN_PB10, 0); /* LCDD5 */ at91_set_A_periph(AT91_PIN_PB11, 0); /* LCDD6 */ at91_set_A_periph(AT91_PIN_PB12, 0); /* LCDD7 */ at91_set_A_periph(AT91_PIN_PB15, 0); /* LCDD10 */ at91_set_A_periph(AT91_PIN_PB16, 0); /* LCDD11 */ at91_set_A_periph(AT91_PIN_PB17, 0); /* LCDD12 */ at91_set_A_periph(AT91_PIN_PB18, 0); /* LCDD13 */ at91_set_A_periph(AT91_PIN_PB19, 0); /* LCDD14 */ at91_set_A_periph(AT91_PIN_PB20, 0); /* LCDD15 */ at91_set_B_periph(AT91_PIN_PB23, 0); /* LCDD18 */ at91_set_B_periph(AT91_PIN_PB24, 0); /* LCDD19 */ at91_set_B_periph(AT91_PIN_PB25, 0); /* LCDD20 */ at91_set_B_periph(AT91_PIN_PB26, 0); /* LCDD21 */ at91_set_B_periph(AT91_PIN_PB27, 0); /* LCDD22 */ at91_set_B_periph(AT91_PIN_PB28, 0); /* LCDD23 */
为:
01.static void at91sam9261ek_lcd_hw_init(void) 02.{ 03. at91_set_A_periph(AT91_PIN_PB1, 0); /* LCDHSYNC */ 04. at91_set_A_periph(AT91_PIN_PB2, 0); /* LCDDOTCK */ 05. at91_set_A_periph(AT91_PIN_PB3, 0); /* LCDDEN */ 06. at91_set_gpio_value(AT91_PIN_PB4, 1); /* LCDCC */ 07. at91_set_A_periph(AT91_PIN_PB7, 0); /* LCDD2 */ 08. at91_set_A_periph(AT91_PIN_PB8, 0); /* LCDD3 */ 09. at91_set_A_periph(AT91_PIN_PB9, 0); /* LCDD4 */ 10. at91_set_A_periph(AT91_PIN_PB10, 0); /* LCDD5 */ 11. at91_set_A_periph(AT91_PIN_PB11, 0); /* LCDD6 */ 12. at91_set_A_periph(AT91_PIN_PB12, 0); /* LCDD7 */ 13. at91_set_A_periph(AT91_PIN_PB15, 0); /* LCDD10 */ 14. at91_set_A_periph(AT91_PIN_PB16, 0); /* LCDD11 */ 15. at91_set_A_periph(AT91_PIN_PB17, 0); /* LCDD12 */ 16. at91_set_A_periph(AT91_PIN_PB18, 0); /* LCDD13 */ 17. at91_set_A_periph(AT91_PIN_PB19, 0); /* LCDD14 */ 18. at91_set_A_periph(AT91_PIN_PB20, 0); /* LCDD15 */ 19. at91_set_B_periph(AT91_PIN_PB23, 0); /* LCDD18 */ 20. at91_set_B_periph(AT91_PIN_PB24, 0); /* LCDD19 */ 21. at91_set_B_periph(AT91_PIN_PB25, 0); /* LCDD20 */ 22. at91_set_B_periph(AT91_PIN_PB26, 0); /* LCDD21 */ 23. at91_set_B_periph(AT91_PIN_PB27, 0); /* LCDD22 */ 24. at91_set_B_periph(AT91_PIN_PB28, 0); /* LCDD23 */
下面为验证的结果:
经过我和我的搭档两天的合作,终于把这个问题解决了!接下来把linux-2.6.30移植到这款板子上来!