RK3288 Android logo |
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RK3288 Android logo
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一、Android 系统开机logo的修改
安卓系统的开机分为u-boot logo 和 kernel logo开机logo图片必须是 bmp 格式，并且分辨率必须为偶数将制作好的BMP格式logo图片放置Android源码kernel目录下，重新编译即可
二、Android logo常见问题分析
1、RK3288 Android uboot logo显示色差
原因: uboot logo 图片只能是8bpp的bmp图（参考uboot源码), 一般使用的都是24bpp 的jpg 和png 图 解决: 使用图片转换脚本或工具转换成8bit 256色的bmp图即可 正确的格式 参考下图(位深度 8bit, 格式bmp):
2、RK3288 Android uboot logo烧录上电无法开机或黑白图案 原因: uboot logo 图片像素不支持 解决: 使用图片转换脚本或工具更改像素即可 3、RK3288 Android uboot logo显示较暗原因: uboot logo 背光低 解决:LVDS屏 uboot-logo显示时，拉高背光使能 diff --git a/device/rockchip/common/ueventd.rockchip.rc b/device/rockchip/common/ueventd.rockchip.rc index 9c1cd0cbfa..19ff54ef53 100644 --- a/device/rockchip/common/ueventd.rockchip.rc +++ b/device/rockchip/common/ueventd.rockchip.rc @@ -42,6 +42,7 @@ /dev/timerirq 0660 system system /dev/accelirq 0660 system system /dev/compassirq 0660 system system +/dev/spi-b 0666 system system # for GPS #/dev/ttyS3 0600 gps gps diff --git a/frameworks/base/cmds/bootanimation/BootAnimation.cpp b/frameworks/base/cmds/bootanimation/BootAnimation.cpp index b75a338907..3f87c7b105 100755 --- a/frameworks/base/cmds/bootanimation/BootAnimation.cpp +++ b/frameworks/base/cmds/bootanimation/BootAnimation.cpp @@ -458,8 +458,19 @@ status_t BootAnimation::readyToRun() { bool BootAnimation::threadLoop() { bool r; + int fd = -1; + int arg = 1; // We have no bootanimation file, so we use the stock android logo // animation. + + fd=open("/dev/spi-b",O_RDWR); + if(fd < 0){ + ALOGW("ybx open /dev/spi-b failed fd=%d,errno=%d",fd,errno); + } + if(fd >= 0){ + ioctl(fd,1,&arg); + close(fd); + } if (mZip == NULL) { r = android(); } else { diff --git a/kernel/default_logo.bmp b/kernel/default_logo.bmp index 75209a0bff..5bd7bc486f 100644 Binary files a/kernel/default_logo.bmp and b/kernel/default_logo.bmp differ diff --git a/kernel/drivers/pwm/tlc5615.c b/kernel/drivers/pwm/tlc5615.c index af69bad142..60bb02fc3a 100644 --- a/kernel/drivers/pwm/tlc5615.c +++ b/kernel/drivers/pwm/tlc5615.c @@ -41,6 +41,7 @@ dev_t devno; struct cdev *tlc_cdev; struct class *cls; struct device *spi_xiaohu_device; +static int flag_open_backlight = 0;^M static int spi_request_gpio(void) @@ -94,6 +95,10 @@ static void gpio_xiaohu_init(void){ //gpio_set_value(ENBLK_S, 1); gpio_set_value(blk_en.gpio_num, blk_en.enable_level); gpio_set_value(ENBLK_T, 1); + gpio_set_value(MOSI, 0); ^M + gpio_set_value(ENBLK, 0);^M + gpio_set_value(ENBLK_S, 0);^M + gpio_set_value(ENBLK_T, 0);^M //gpio_set_value(VGA_RESET,1); } @@ -162,7 +167,9 @@ void DAconvert(unsigned int value){ ss_enable(0); if (value >= 10) isbackon = value; - EnBacklight(isbackon); // if value == 0 disable backlight +^M + if(flag_open_backlight)^M + EnBacklight(isbackon); // if value == 0 disable backlight^M } @@ -175,6 +182,7 @@ long spi_xiaohu_ioctl(struct file *file, unsigned cmd, unsigned long arg){ DAconvert(arg); break; case 1: + flag_open_backlight = 1;^M EnBacklight(arg); break; } |
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