msm8909+android5.1.1 's BSP development---switching machine charging Tri-color lamp control

<span id="Label3"></p><p align="center"><p align="center"><span style="font-size:14px;">msm8909+android5.1.1 's BSP development---switching machine charging Tri-color lamp control</span></p></p><p align="center"><p align="center"><span style="font-size:14px;"><br></span></p></p><p align="center"><p align="center"></p></p><p align="center"><p align="center"><span style="font-size:14px;">Figure 1</span></p></p><p><p><span style="font-size:14px;"></span></p></p><p><p><span style="font-size:14px;"></span></p></p><p><p><span style="font-size:14px;">1. Charge Tri-color Lamp Control</span></p></p><p><p><span style="font-size:14px;">1.1 Power-off charge Tri-color Lamp Control</span></p></p><p><p><span style="font-size:14px;">Related Documents: system\core\healthd\healthd_mode_charger.cpp</span></p></p><p><p><span style="font-size:14px;"></span></p></p><p><p><span style="font-size:14px;">When the current charge is not equal to the previous charge, call Handle_power_supply_state ()--->set_battery_soc_leds () to control the Tri-color lamp, first look at the global array used in it</span></p></p><p><p></p></p><pre code_snippet_id="1586395" snippet_file_name="blog_20160224_1_7949533" name="code" class="cpp"><pre code_snippet_id="1586395" snippet_file_name="blog_20160224_1_7949533" name="code" class="cpp">#define Red_led_path " /sys/class/leds/red/brightness" #define Green_led_path "/sys/class/leds/green/ Brightness "#define blue_led_path" /sys/class/leds/blue/brightness "struct led_ctl leds[3] = {{red_led, red_ led_path}, {green_led, green_led_path},{blue_led,blue_led_path}}; struct soc_led_color_mapping soc_leds[3] ={ {red_led}, {$ , red_led | green_led}, {green_led},};</pre></pre><p><p></p></p><p><p><span style="font-size:14px;">Qualcomm's Design Ideas Are:</span></p></p><p><p><span style="font-size:14px;">Red: low power, less than 15%</span></p></p><p><p><span style="font-size:14px;">Blue: charging, charge from 15% to 90%</span></p></p><p><p><span style="font-size:14px;">Green: 90% to 100% Power</span></p></p><p><p><span style="font-size:14px;">For example, for/sys/class/leds/chg_red/brightness, set to 0 for red, 1 for green, and 255 for Green</span></p></p><p><p><span style="font-size:14px;">/green/brightness, set to 0 for off green, set to 1 to open the light</span></p></p><p><p></p></p><pre code_snippet_id="1586395" snippet_file_name="blog_20160224_2_4045056" name="code" class="cpp"><pre code_snippet_id="1586395" snippet_file_name="blog_20160224_2_4045056" name="code" class="cpp">static int set_battery_soc_leds (int soc) { int i, color; static int old_color = 0; int fd; Char buffer[10]; FD = Open ("/sys/class/leds/chg_red/brightness", o_rdwr); snprintf (buffer, sizeof (int), "%d\n", 0); Write (fd, buffer, strlen (buffer)); Close (fd); For (i = 0; i < (int) array_size (soc_leds), i++) { if (soc <= soc_leds[i].soc) break ; } color = soc_leds[i].color; If (old_color! = Color) { set_tricolor_led (0, old_color); set_tricolor_led (1, color); Old_color = color; LOGV ("SOC =%d, Set led color 0x%x\n", soc,soc_leds[i].color); } Return 0;}</pre></pre><br><p><p></p></p><p><p><span style="font-size:14px;">This is the High-pass default design, but for our hardware design, there is a problem, is the power >15%, red and green lights are bright, in order to solve this problem, and we power off the battery <95% is a red light, >=95% for green, modified as Follows:</span></p></p><p><p></p></p><pre code_snippet_id="1586395" snippet_file_name="blog_20160224_3_523045" name="code" class="cpp">struct Led_ctl leds[2] = {{red_led, red_led_path}, {green_led, green_led_path}}; struct soc_led_color_mapping soc_leds[2] ={{green_led},};static, red_led}, {----) int i, color; static int old_color = 0; int fd; Char buffer[10]; FD = Open ("/sys/class/leds/chg_red/brightness", o_rdwr); snprintf (buffer, sizeof (int), "%d\n", 0),//red on write (fd, buffer, strlen (buffer)); Close (fd); For (i = 0; i < (int) array_size (soc_leds), i++) {if (soc <= soc_leds[i].soc) break; If (old_color! = Color) {if (soc>=soc_leds[1].soc) {fd =open ("/sys/class/leds/chg_red/brightness", o_rdwr); snprintf (buffer,sizeof (int), "%d\n", 255);//red off write (fd,buffer, strlen (buffer)); Close (fd); Fd= Open ("/sys/class/leds/red/brightness", o_rdwr); snprintf (buffer,sizeof (int), "%d\n", 0); Write (fd,buffer, strlen (buffer)); Close (fd); Set_tricolor_led (1,green_led); } else {set_tricolor_led (1,red_led); } Old_color = color; LOGV ("SOC =%d, Set led color0x%x\n", soc, soc_leds[i].color); } return 0;}</pre><br><p><p></p></p><p><p><span style="font-size:14px;">1.2 power-on Charge Tri-color light control</span></p></p><p><p></p></p><pre code_snippet_id="1586395" snippet_file_name="blog_20160224_4_4285036" name="code" class="cpp">frameworks/base/services/core/java/com/android/server/batteryservice.javapublic void updateLightsLocked ()/** * Synchronize on Batteryservice. */public void updatelightslocked () {final int. level = mbatteryprops.batterylevel; Final int status = mbatteryprops.batterystatus; If (level < Mlowbatterywarninglevel) {if (status ==batterymanager.battery_status_charging) { Solid Red when Batteryis charging Mbatterylight.setcolor (mbatterylowargb); } else {//Flash red when batteryis low and not charging mbatterylight.setflashing (m batterylowargb, light.light_flash_timed, mbatteryledon,mbatteryledoff); }} else if (status = = Batterymanager.battery_status_charging | | status ==batterymanager.batt Ery_status_full) {if (STATUS ==batterymanager.battery_Status_full | | Level >=95) {//kandi change from the To95//Solid green when full orcharging and nearly full Mbatterylight.setcolor (mbatteryfullargb); } else {//Solid Orange whencharging and halfway full Mbatterylight.setcolor (mbatter ylowargb); }} Else {//No lights if not charging Andnot low Mbatterylight.turnoff (); } }</pre><br><p><p></p></p><p><p><span style="font-size:14px;">2. Discharge Tri-color Lamp Control</span></p></p><p><p><span style="font-size:14px;">2.1 Battery <15%</span></p></p><p><p><span style="font-size:14px;">Low battery red flashes are also controlled using the updatelightslocked () Above.</span></p></p><p><p><span style="font-size:14px;"></span></p></p><p><p><span style="font-size:14px;"></span></p></p><p><p>msm8909+android5.1.1 's BSP development---switching machine charging Tri-color lamp control</p></p></span>