Android 8.1 关机充电动画（二）Uboot模式

system：Android 8.1

platform：RK3326/PX30

uboot

kernel

Android 8.1 关机充电动画（一）模式选择

Android 8.1 关机充电动画（二）Uboot模式

Android 8.1 关机充电动画（三）Android模式

文章目录

前言

相关文档

相关代码

总结

附录

前言

这部分要涉及到uboot下关机充电动画的定制，属于比较low level的部分，所以代码修改的部分不大，在uboot中主要是对多张图片进行轮播，所以这里的主要工作是定位到相应的代码以及如何定制自己的动画。

相关文档

RK在uboot的开发方面已经给出了文档，

其中已经包括了这部分动画如何打包到rom中，不可避免的是需要重新编译uboot，但是图片会被打包到resource.img中。

相关代码

重新回到代码中u-boot/drivers/power/charge_animation.c

struct charge_image { const char *name; int soc; int period; /* ms */ }; /* * IF you want to use your own charge images, please: * * 1. Update the following 'image[]' to point to your own images; * 2. You must set the failed image as last one and soc = -1 !!! */ static const struct charge_image image[] = { { .name = "battery_0.bmp", .soc = 5, .period = 600 }, { .name = "battery_1.bmp", .soc = 20, .period = 600 }, { .name = "battery_2.bmp", .soc = 40, .period = 600 }, { .name = "battery_3.bmp", .soc = 60, .period = 600 }, { .name = "battery_4.bmp", .soc = 80, .period = 600 }, { .name = "battery_5.bmp", .soc = 100, .period = 600 }, { .name = "battery_fail.bmp", .soc = -1, .period = 1000 }, };

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name ：文件名

soc：图片对应的电量百分比

period：图片显示的时间（单位：ms）

那么，这里问题来了，图片如何打包到固件里呢？

先找到RK提供的打包用的脚本，u-boot/pack_resource.sh

找到需要打包的图片，然后需要修改的直接替换掉，图片采用8bit或24bit bmp格式，图片路径：u-boot/tools/images/，如下图所示：

最终就是如何打包图片了：

cd u-boot && ./pack_resource.sh ../kernel/resource.img

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执行完以上命令后，终端会输出以下信息，说明打包成功；

Pack ./tools/images/ & resource.img to resource.img ... Unpacking old image(resource.img): rk-kernel.dtb battery_1.bmp battery_2.bmp battery_3.bmp battery_4.bmp battery_5.bmp battery_fail.bmp logo.bmp logo_kernel.bmp battery_0.bmp Pack to resource.img successed! Packed resources: rk-kernel.dtb battery_1.bmp battery_2.bmp battery_3.bmp battery_4.bmp battery_5.bmp battery_fail.bmp logo.bmp logo_kernel.bmp battery_0.bmp resource.img is packed ready

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并且会在当前的路径下重新生成resource.img，将这个文件重新烧写到设备的对应分区，就可以把充电动画打包到设备的rom中了。

总结

简单介绍了RK平台上进行关机充电uboot模式下充电动画的定制和打包方法，篇幅较短，也可以参考RK官方的文档，下一篇介绍一下，关机充电Android模式下如何进行充电动画的修改。附录是充电动画显示的主要代码。

附录

下面的代码是函数static int charge_animation_show(struct udevice *dev)中的while(1)，这里会一直循环显示充电图片；

/* Charging ! */ while (1) { /* * At the most time, fuel gauge is usually a i2c device, we * should avoid read/write all the time. We had better set * poll seconds to update fuel gauge info. */ if (!first_poll_fg && get_timer(delta) < FUEL_GAUGE_POLL_MS) goto show_images; delta = get_timer(0); debug("step1 (%d)... \n", screen_on); /* * Most fuel gauge is I2C interface, it shouldn't be interrupted * during tansfer. The power key event depends on interrupt, so * so we should disable local irq when update fuel gauge. */ local_irq_disable(); /* Step1: Is charging now ? */ charging = fuel_gauge_get_chrg_online(fg); if (charging <= 0) { printf("Not charging, online=%d. Shutdown...\n", charging); /* wait uart flush before shutdown */ mdelay(5); /* PMIC shutdown */ pmic_shutdown(pmic); printf("Cpu should never reach here, shutdown failed !\n"); continue; } debug("step2 (%d)... show_idx=%d\n", screen_on, show_idx); /* Step2: get soc and voltage */ soc = fuel_gauge_get_soc(fg); if (soc < 0 || soc > 100) { printf("get soc failed: %d\n", soc); continue; } voltage = fuel_gauge_get_voltage(fg); if (voltage < 0) { printf("get voltage failed: %d\n", voltage); continue; } current = fuel_gauge_get_current(fg); if (current == -ENOSYS) { printf("get current failed: %d\n", current); continue; } first_poll_fg = 0; local_irq_enable(); show_images: /* * Just for debug, otherwise there will be nothing output which * is not good to know what happen. */ if (!debug_start) debug_start = get_timer(0); if (get_timer(debug_start) > 20000) { debug_start = get_timer(0); printf("[%8ld]: soc=%d%%, vol=%dmv, c=%dma, online=%d, screen_on=%d\n", get_timer(0)/1000, soc, voltage, current, charging, screen_on); } /* * If ever lowpower screen off, force screen_on=false, which * means key event can't modify screen_on, only voltage higher * then threshold can update screen_on=true; */ if (ever_lowpower_screen_off) screen_on = false; /* * Auto turn on screen when voltage higher than Vol screen on. * 'ever_lowpower_screen_off' means enter while loop with * screen off. */ if ((ever_lowpower_screen_off) && (voltage > pdata->screen_on_voltage)) { ever_lowpower_screen_off = false; screen_on = true; show_idx = IMAGE_SHOW_RESET; } /* * IMAGE_SHOW_RESET means show_idx show be update by start_idx. * When short key pressed event trigged, we will set show_idx * as IMAGE_SHOW_RESET which updates images index from start_idx * that calculate by current soc. */ if (show_idx == IMAGE_SHOW_RESET) { for (i = 0; i < image_num - 2; i++) { /* Find out which image we start to show */ if ((soc >= image[i].soc) && (soc < image[i + 1].soc)) { start_idx = i; break; } if (soc >= 100) { start_idx = image_num - 2; break; } } debug("%s: show_idx=%d, screen_on=%d\n", __func__, show_idx, screen_on); /* Mark start index and start time */ show_idx = start_idx; show_start = get_timer(0); } debug("step3 (%d)... show_idx=%d\n", screen_on, show_idx); /* Step3: show images */ if (screen_on) { /* Don't call 'charge_show_bmp' unless image changed */ if (old_show_idx != show_idx) { old_show_idx = show_idx; debug("SHOW: %s\n", image[show_idx].name); charge_show_bmp(image[show_idx].name); } /* Re calculate timeout to off screen */ if (priv->auto_screen_off_timeout == 0) priv->auto_screen_off_timeout = get_timer(0); } else { priv->auto_screen_off_timeout = 0; system_suspend_enter(pdata); } mdelay(5); /* Every image shows period */ if (get_timer(show_start) > image[show_idx].period) { show_start = get_timer(0); /* Update to next image */ show_idx++; if (show_idx > (image_num - 2)) show_idx = IMAGE_SHOW_RESET; } debug("step4 (%d)... \n", screen_on); /* * Step4: check key event. * * Short key event: turn on/off screen; * Long key event: show logo and boot system or still charging. */ key_state = check_key_press(dev); if (key_state == KEY_PRESS_DOWN) { old_show_idx = IMAGE_SHOW_RESET; /* NULL means show nothing, ie. turn off screen */ if (screen_on) charge_show_bmp(NULL); /* * Clear current image index, and show image * from start_idx */ show_idx = IMAGE_SHOW_RESET; /* * We turn off screen by charge_show_bmp(NULL), so we * should tell while loop to stop show images any more. * * If screen_on=false, means this short key pressed * event turn on the screen and we need show images. * * If screen_on=true, means this short key pressed * event turn off the screen and we never show images. */ if (screen_on) screen_on = false; else screen_on = true; } else if (key_state == KEY_PRESS_LONG_DOWN) { /* Only long pressed while screen off needs screen_on true */ if (!screen_on) screen_on = true; /* Is able to boot now ? */ if (soc < pdata->exit_charge_level) { printf("soc=%d%%, threshold soc=%d%%\n", soc, pdata->exit_charge_level); printf("Low power, unable to boot, charging...\n"); show_idx = image_num - 1; continue; } if (voltage < pdata->exit_charge_voltage) { printf("voltage=%dmv, threshold voltage=%dmv\n", voltage, pdata->exit_charge_voltage); printf("Low power, unable to boot, charging...\n"); show_idx = image_num - 1; continue; } /* Success exit charging */ printf("Exit charge animation...\n"); charge_show_logo(); break; } else { /* Do nothing */ } debug("step5 (%d)... \n", screen_on); /* Step5: Exit by ctrl+c */ if (ctrlc()) { if (voltage >= pdata->screen_on_voltage) charge_show_logo(); printf("Exit charge, due to ctrl+c\n"); break; } }

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