Knowedge about CompactPCI Serial
Posted inEmbedded

Knowedge about CompactPCI Serial

Star Topology CompactPCI Serial不需要bridge/switch或者特殊背板 Ethernet Full Mesh Architecture 在一个系统下，CompactPCI Serial可以连接一共9个Card。 Interfaces PICMG CPCI-S.0系统槽（System Slot）在背板连接器需要支持以下接口 8 x PCI Express 6 x4 links 2 x8 links (fat pipes) 2 dedicated I²C high-speed…
CrossCompile openssh
Posted inCrossCompile

CrossCompile openssh

ChangeLog Download sources [crayon-698ee27c633b3354963217/] Build openssl 如果编译器中自带了openssl库则不需要自己重新编译openssl。如果编译器不带openssl，或者自带的openssl有漏洞，则需要自己下载并编译openssl。 http://kaoru.tech/archives/50 http://kaoru.tech/archives/1385 Build zlib (i.MX6Ul) [crayon-698ee27c633b7982777213/] Build openssh [crayon-698ee27c633b9327355723/] SAM9X5 (CROSS_COMPILE:arm-linux) [crayon-698ee27c633ba591037520/] i.MX6UL (CROSS_COMPILE:arm-poky-linux-gnueabi) [crayon-698ee27c633bb169205412/] Deploy [crayon-698ee27c633bc113182607/] Reference https://bbs.archlinux.org/viewtopic.php?id=165382
Posted inEmbedded

How to use USB CDC ACM

Kernel Configuration On Embedded Platform Insmod Drivers After that, a new UART device node will be found in /dev/ [crayon-698ee27c6373d577035279/] Connect Target to Host with a USB cable You will see…
Posted inEmbedded

How to use USB device networking

Kernel Configuration On Embedded Target Insmod Drivers After that, you will see a new usb ethernet adapter by 'ifconfig -a' [crayon-698ee27c637fb017535414/] Assign ethernet adapter 'usb0' with IP address [crayon-698ee27c637fe298876979/] Connect Target…
Posted inPowerPC

T104x SD/MMC boot research

PBL -> load RCW (64 bytes/512 bits) -> write to RCWSRn cfg_rcw_src [0]_[1:4]_[5:8] -> 0_0100_0000 cfg_rcw_src用以决定RCW配置字的来源 RCW[PBI_SRC]用以决定PBL初始化控制器的类别 SD启动，起始地址为0x0000_1000，SD Card block size 512KB Useful macros: CONFIG_SYS_FSL_PBL_RCW CONFIG_SYS_FSL_PBL_PBI Reference https://pagure.io/u-boot/raw/2015-07/f/board/freescale/t104xrdb/README u-boot:board/freescale/t104xrdb/README
Posted inEmbedded

Freescale DPAA tips

structs struct qm_fd - Frame Descriptor functions dma_addr_t qm_fd_addr(const struct qm_fd *) 获得fd的物理地址  
Posted inYocto

Yocto tips

查找某个包的源码位置： [crayon-698ee27c6396a278710952/] 编译 [crayon-698ee27c6396d915971229/] 编译Standalone编译器 [crayon-698ee27c6396e251681012/]