培訓(xùn)helen2014m8sw amlogic軟件介紹

1、AMLOGIC M8 軟件介紹 sandyluocode獲取和編譯 軟件注意事項(xiàng)：SW-Checklist-MID.xls硬件穩(wěn)定性的驗(yàn)證方法最小系統(tǒng)M8最小系統(tǒng)如下：1，CPU頻率恒定792M （系統(tǒng)默認(rèn)是96M1.99G Hz動(dòng)態(tài)調(diào)整,vcck電壓也是動(dòng)態(tài)調(diào)整）deviceamlogick100init.amlogic.board.rc里write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor hotplug 改write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

2、 performance commonarcharmmach-meson8clock.c 里#define CPU_FREQ_LIMIT 1992000000改792000000 2，mali 恒定跑182M(如附件patch)，hardwarearmgpu.git（系統(tǒng)默認(rèn)是128M637MHz動(dòng)態(tài)調(diào)整） 3,ubootboardamlogicconfigsm8_k100_v1.h 打開3個(gè)宏：#define CONFIG_M8_GATEACDDRCLK_DISABLE 1#define CONFIG_M8_PUB_WLWDRDRGLVTWDRDBVT_DISABLE 1#define CO

3、NFIG_M8_DDR_LOW_POWER_DISABLE 1提高AO電壓：#define CONFIG_VDDAO_VOLTAGE 1100改1150 降低DDR頻率：#define CFG_M8_DDR_CLK 516或者2T modedevice tree介紹1,dtd介紹 2，512M/1GB/2GB內(nèi)存配置串口命令1，燒錄ubootmmcinfofatload mmc 0 12000000 u-boot.binstore rom_write 12000000 0 600002,啟動(dòng)卡制作工具介紹：BootcardMaker.exe3，擦除nandamlnf disprotect fb

4、btamlnf disprotect keystore scrubresetrun update寄存器讀寫：echo read c 0 x1068 /sys/class/amlogic/debugecho write 0 x8001022a c 0 x1068 /sys/class/amlogic/debugGPIO的使用dtd里GPIO的配置lcd_ttl_rgb_6bit_pins_on:lcd_ttl_rgb_6bit_onamlogic,setmask=;amlogic,clrmask=;amlogic,pins = GPIODV_2,GPIODV_3,GPIODV_4,GPIODV_5,GPIODV_6,GPIODV_7,/R2R7GPIODV_10,GPIODV_11,GPIODV_12,GPIODV_13,GPIODV_14,GPIODV_15,/G2G