am335x system upgrade set/get current cpufreq(二十一)

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am335x system upgrade set/get current cpufreq(二十一)

1 Scope of Document This document describes am335x cpufreq technology insider. 2 Requiremen 2.1 Function Requirement How to get current cpufreq, and to change cpufreq. Learning Processor Clocking Control(PPC) Interface Specification, le…

am335x system upgrade rootfs using yocto make rootfs(十二)

1 Scope of Document This document describes how to make am335x arago rootfs using ycoto project 2 Requiremen 2.1 Function Requirement Make am335x arago rootfs 2.2 Performance Requirement NA 3 Functional Description 3.1 Ycot…

am335x system upgrade uboot ethernet(二)

系统可以通过SD卡引道之后,为了之后了调试方便通过查看网卡的硬件设计正常来说需要注意的有如下几点: 1) 网口的接线方式: RMII 2) 网口的PHY地址两张网口,这里我们只需先初始化一张网卡,通过查看PHY的数据手册,可以发现其代码PHY地址是0. 3) 将对应的网卡驱动在include/configs/am335x_evm.h 添加对应的网卡驱动选项,以支持对应的PHY. Index: board.c==========================================…

am335x system upgrade kernel ethernet(四)

1 Scope of Document This document describes ethernet hardware design and porting KZS8081 to uboot and kernel 2 Requiremen 2.1 Function Requirement Use KZS8081 in am335x, user space use network interface 2.2 Performance Requirement S…

am335x system upgrade kernel gpio(九)

1 Hardware Overview gpio interface,pin map: AM335X_I2C0_W_C----------------------MCASP0_AXR1 /*4g-power*/ AM335X_MMC2_DAT0------------------GPMC_A1 /*4g-reset*/ AM335X_MMC2_DAT2------------------GPMC_A3 /*wifi-led*/ AM335X_WIFI------------------…

am335x system upgrade uboot nand boot(三)

在uboot 下初始化nand,一般需要做如下工作: 第一: 配置默认从NAND boot Index: include/configs/am335x_evm.h===================================================================--- include/configs/am335x_evm.h (revision 8)+++ include/configs/am335x_evm.h (revision 9)@@ -17,9 +17…