基于嵌入式linux的数码相框系统概要设计说明书

基于嵌入式linux的数码相框概要设计说明书基于嵌入式linux的数码相框概要设计说明书基于嵌入式linux的数码相框系统系统概要设计提交：八分之一组提交：八分之一组审核：核准：提交：审核：核准：目录一引言 PAGEREF__RefHeading___Toc8911\h错误：引用源未找到HYPERLINK 1HYPERLINK 1HYPERLINK主程序设计 17HYPERLINK dependsonMTD_NAND_S3C help EnabledebuggingoftheS3CNANDdriver configMTD_NAND_S3C_HWECC bool"S3CNANDHardwareECC" dependsonMTD_NAND_S3C EnabletheuseoftheS3C'sinternalECCgeneratorwhen usingNAND.Earlyversionsofthechiphavehadproblemswith incorrectECCgeneration,andifusingthese,thedefaultof softwareECCispreferable. IfyoulaydownadevicewiththehardwareECC,thenyouwill currentlynotbeabletoswitchtosoftware,asthereisno implementationforECCmethodusedbytheS3C 修改drivers/mtd/nand/Makefile 在 obj-$(CONFIG_MTD_NAND_S3C2410) +=s3c2410.o 下面添加： obj-$(CONFIG_MTD_NAND_S3C) +=s3c_nand.oEnabletheuseoftheS3C'sinternalECCgeneratorwhen usingNAND.Earlyversionsofthechiphavehadproblemswith incorrectECCgeneration,andifusingthese,thedefaultof softwareECCispreferable. IfyoulaydownadevicewiththehardwareECC,thenyouwill currentlynotbeabletoswitchtosoftware,asthereisno implementationforECCmethodusedbytheS3C 修改drivers/mtd/nand/Makefile 在 obj-$(CONFIG_MTD_NAND_S3C2410) +=s3c2410.o 下面添加： obj-$(CONFIG_MTD_NAND_S3C) +=s3c_nand.o 配置内核： makemenuconfig DeviceDrivers> <*>MemoryTechnologyDevice(MTD)support> <*>CachingblockdeviceaccesstoMTDdevices <*>NANDDeviceSupport> <*>NANDFlashsupportforS3CSoC [*]S3CNANDHardwareECC Filesystems> PartitionTypes> [*]Advancedpartitionselection [*]PCBIOS(MSDOSpartitiontables)support [*]BSDdisklabel(FreeBSDpartitiontables)support 编译内核并拷贝到tftpboot下$makezImage$cparch/arm/boot/zImage/tftpboot3.2USB驱动模块usb驱动编码：usb驱动编码：S5PV210_usb.c编写：孙家昌日期：2015.11.4键盘测试编码审核：日期：2015.11.4功能描述：当usb设备插入开发板后，开发板能够读取usb设备中的内容。处理流程： 拷贝ohci.h到arch/arm/mach-s5pv210/include/mach/目录下拷贝usb-phy.h到arch/arm/mach-s5pv210/include/mach/目录下拷贝setup-usb-phy.c到arch/arm/mach-s5pv210/目录下拷贝regs-otg.h到arch/arm/plat-samsung/include/plat/目录下拷贝ohci-exynos.c到drivers/usb/host/目录下修改drivers/usb/host/ohci-hcd.c在#ifdefCONFIG_USB_OHCI_HCD_OMAP1#include"ohci-omap.c"#defineOMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver#endif上边添加如下代码：#ifdefCONFIG_ARCH_S5PV210#include"ohci-exynos.c"#definePLATFORM_DRIVER exynos_ohci_driver#endif修改drivers/usb/Kconfig在 defaultyifARCH_S3C2410下添加：defaultyifARCH_S5PV210修改arch/arm/mach-s5pv210/Kconfig在configS5PV210_SETUP_I2C1 bool help Commonsetupcodefori2cbus1.下面添加如下代码：configS5PV210_SETUP_USB_PHY bool help CommonsetupcodefortheUSBPHYcontroller在configMACH_SMDKV210 bool“SMDKV210”下添加： selectS5P_DEV_USB_OHCI selectS5PV210_SETUP_USB_PHY修改arch/arm/plat-s5p/Kconfig在configS5P_DEV_USB_EHCI bool help CompileinplatformdevicedefinitionforUSBEHCI下添加如下代码：configS5P_DEV_USB_OHCI bool help CompileinplatformdevicedefinitionforUSBOHCI修改arch/arm/mach-s5pv210/Makefile在文件最后添加obj-$(CONFIG_S5PV210_SETUP_USB_PHY) +=setup-usb-phy.o修改arch/arm/mach-s5pv210/include/mach/map.h：添加如下代码：#defineS5PV210_PA_OHCI 0xEC300000#defineS5P_PA_OHCI S5PV210_PA_OHCI #defineS5P_SZ_OHCI SZ_1M修改arch/arm/plat-samsung/include/plat/map-base.h：添加如下代码：#defineS3C_VA_OTGS3C_ADDR(0x00E00000)#defineS3C_VA_OTGSFRS3C_ADDR(0x00F00000)修改平台代码arch/arm/mach-s5pv210/mach-smdkv210.c：添加头文件：#include<mach/ohci.h>#include<mach/usb-phy.h>添加如下代码：staticstructmap_descs5pv210_iodesc[]__initdata={ { .virtual =(unsignedlong)S3C_VA_OTG, .pfn =__phys_to_pfn(S5PV210_PA_HSOTG), .length =SZ_1M, .type =MT_DEVICE, },{ .virtual =(unsignedlong)S3C_VA_OTGSFR, .pfn =__phys_to_pfn(S5PV210_PA_HSPHY), .length =SZ_1M, .type =MT_DEVICE, },};修改：s5p_init_io(NULL,0,S5P_VA_CHIPID);为：s5p_init_io(s5pv210_iodesc,ARRAY_SIZE(s5pv210_iodesc),S5P_VA_CHIPID);添加代码：/*USBOHCI*/staticstructs5p_ohci_platdatas5pv210_ohci_pdata;staticvoid__inits5pv210_ohci_init(void){ structs5p_ohci_platdata*pdata=&s5pv210_ohci_pdata; s5p_ohci_set_platdata(pdata);}/*USBOHCIHostControllerregistration*/staticstructresources5p_ohci_resource[]={ [0]={.start=S5P_PA_OHCI,.end=S5P_PA_OHCI+S5P_SZ_OHCI-1, .flags =IORESOURCE_MEM, }, [1]={ .start =IRQ_UHOST, .end =IRQ_UHOST, .flags =IORESOURCE_IRQ, }};staticu64s5p_device_ohci_dmamask=0xffffffffUL;structplatform_devices5p_device_ohci={ .name ="s5p-ohci", .id =-1, .num_resources =ARRAY_SIZE(s5p_ohci_resource), .resource =s5p_ohci_resource, .dev ={ .dma_mask=&s5p_device_ohci_dmamask, .coherent_dma_mask=0xffffffffUL }};void__inits5p_ohci_set_platdata(structs5p_ohci_platdata*pd){ structs5p_ohci_platdata*npd; npd=s3c_set_platdata(pd,sizeof(structs5p_ohci_platdata), &s5p_device_ohci); if(!npd->phy_init) npd->phy_init=s5p_usb_phy_init; if(!npd->phy_exit) npd->phy_exit=s5p_usb_phy_exit; if(!npd->port_status) npd->port_status=s5p_usb_host_port_status;}在机构体数组smdkv210_devices[]中添加&s5p_device_ohci,在函数smdkv210_machine_init中添加s5pv210_ohci_init();配置内核makemenuconfigSCSIdevicesupport> <*>SCSIdevicesupport <*>SCSIdisksupport <*>SCSIgenericsupport[*]USBsupport> <*>SupportforHost-sideUSB <*>OHCIHCDsupport <*>USBMassStoragesupport 编译内核并拷贝到tftpboot下$makezImage$cparch/arm/boot/zImage/tftpboot 测试启动目标板并在目标板上完成如下操作：插入U盘显示如下usb1-1.4:newfull-speedUSBdevicenumber5usings5p-ohciscsi2:usb-storage1-1.4:1.0scsi2:0:0:0:Direct-AccessaigoMiniking8.07PQ:0ANSI:2sd2:0:0:0:Attachedscsigenericsg0type0sd2:0:0:0:[sda]7886848512-bytelogicalblocks:(4.03GB/3.76GiB)sd2:0:0:0:[sda]WriteProtectisoffsd2:0:0:0:[sda]NoCachingmodepagepresentsd2:0:0:0:[sda]Assumingdrivecache:writethroughsd2:0:0:0:[sda]NoCachingmodepagepresentsd2:0:0:0:[sda]Assumingdrivecache:writethroughsda:sda1(这里显示的内容是设备与分区)sd2:0:0:0:[sda]NoCachingmodepagepresentsd2:0:0:0:[sda]Assumingdrivecache:writethroughsd2:0:0:0:[sda]AttachedSCSIremovablediskusb1-1.4:newfull-speedUSBdevicenumber5usings5p-ohci在终端上执行挂载的设备与上边显示相关#mount-tvfat/dev/sda1/mnt#ls可以查看到U盘内容。3.3framebuffer驱动模块LCD驱动编码：编写：张高凡日期：2015.11.4键盘测试编码Color.c审核：日期：2015.11.4功能描述：LCD液晶屏的显像【实验环境】主机：ubuntu12.04发行版目标机：AJY210平台交叉编译工具：arm-cortex_a8-linux-gnueabi-gcc修改平台代码 Vimarch/arm/mach-s5pv210/mach-smdkv210.c 在函数smdkv210_machin