# bsp内核的SPI flash启动
## Flash分区规划
这里 使用MX25L25645G, 32M SPI flash作为启动介质，规划分区如下：
|分区序号|分区大小|分区作用|地址空间及分区名|
|--|--|--|--|
|mtd0|1MB|spl+uboot|0x0000000-0x0100000 : "uboot"|
|mtd1|64KB|script.bin文件|0x0100000-0x0110000 : "script"|
|mtd2|4MB|linux内核|0x0110000-0x0510000 : "kernel"|
|mtd3|剩余|根文件系统|0x0510000-0x2000000 : "rootfs"|
### 配置uboot默认环境变量
在文件`include/configs/sun8i.h`中添加默认bootcmd和bootargs的环境变量设置，注意添加的位置在“#include <configs/sunxi-common.h>”的前边。
~~~
vi include/configs/sun8i.h
#define CONFIG_MACH_TYPE 0x1029
#define CONFIG_BOOTCOMMAND "sf probe 0; " \
"sf read 0x41d00000 0x100000 0x10000; " \
"sf read 0x41000000 0x110000 0x400000; " \
"bootz 0x41000000"
#define CONFIG_BOOTARGS "console=ttyS0,115200 earlyprintk panic=5 rootwait " \
"mtdparts=spi32766.0:1M(uboot)ro,64k(script)ro,4M(kernel)ro,16M(rootfs),-(data) root=31:03 rw rootfstype=squashfs"
~~~
~~~
#ifdef CONFIG_ARCH_SUN8IW8
static int partitions_register(struct mtd_info *mtd, struct mtd_part_parser_data *ppdata)
{
ret = m25p80_read(mtd, MBR_OFFSET, MBR_SIZE, &retlen, (u_char *)sunxi_mbr);
~~~
所以需要在240K（0x3C000）偏移处， 写入16KB大小的MBR信息
~~~
#define MBR_OFFSET ((256-16)*1024)
#define MBR_SIZE (16 * 1024)
#define DL_SIZE (16 * 1024)
#define MBR_MAGIC "softw411"
#define MBR_MAX_PART_COUNT 120
#define MBR_RESERVED (MBR_SIZE - 32 - (MBR_MAX_PART_COUNT * sizeof(PARTITION))) //mbr����Ŀռ�
#define NOR_BLK_SIZE 512
/* partition information */
typedef struct sunxi_partition_t
{ ַ
unsigned int addrhi; //��ʼ��ַ, ������Ϊ��λ
unsigned int addrlo; //
unsigned int lenhi; //����
unsigned int lenlo; //
unsigned char classname[16]; //���豸��
unsigned char name[16]; // 豸��
unsigned int user_type; //�ؼ�û��ݣ�Ҫ����������ʧ
unsigned int keydata; //��дؼ��� ݣ�Ҫ����������ʧ
unsigned int ro; //��д //�������ݣ�ƥ��ֽ
unsigned char reserved[68]; //�������ݣ�ƥ�������Ϣ128�ֽ�
}__attribute__ ((packed))PARTITION;
/* mbr information */
typedef struct
{
unsigned int crc32; // crc 1k - 4
unsigned int version; // �汾��Ϣ�� 0x00000100
unsigned char magic[8]; //softw311"
unsigned int copy; //����
unsigned int index; //�ڼ���MBR����
unsigned int PartCount; //��������
unsigned int stamp[1]; //����
PARTITION array[MBR_MAX_PART_COUNT]; //
unsigned char res[MBR_RESERVED];
}__attribute__ ((packed)) MBR;
~~~
由于增加MBR信息不太方便，这里我们直接修改linux-3.4/drivers/mtd/devices/m25p80.c partitions_register函数，手工加入分区信息
~~~
partitions = kzalloc(4, GFP_KERNEL);
if (partitions == NULL) {
M25_ERR("Failed to kzalloc(%d patition)\n", sunxi_mbr->PartCount);
kfree(sunxi_mbr);
return -ENOMEM;
}
partitions[0].name = "uboot";
partitions[0].offset = 0;
partitions[0].size = 1024 * 1024;
partitions[1].name = "script";
partitions[1].offset = 1024*1024;
partitions[1].size = 64 * 1024;
partitions[2].name = "kernel";
partitions[2].offset = 1024*1024 + 64*1024;
partitions[2].size = 4 * 1024 * 1024;
partitions[3].name = "rootfs";
partitions[3].offset = 1024*1024 + 64*1024 + 4*1024*1024;
partitions[3].size = 11200 * 1024;
//ret = mtd_device_parse_register(mtd, NULL, ppdata, partitions, sunxi_mbr->PartCount-1);
ret = mtd_device_parse_register(mtd, NULL, ppdata, partitions, 4);
~~~
修改后成功启动：
但是会有一些jffs2的警告，这里就需要在制作jffs2时，加上
~~~
U-Boot SPL 2017.01-rc2-00073-gdd6e874-dirty (Nov 27 2017 - 06:51:50)
DRAM: 64 MiB
Trying to boot from sunxi SPICPU: Allwinner V3s (SUN8I 1681)
Model: Lichee Pi Zero
DRAM: 64 MiB
MMC: SUNXI SD/MMC: 0
SF: Detected w25q128bv with page size 256 Bytes, erase size 64 KiB, total 16 MiB
*** Warning - bad CRC, using default environment
Setting up a 800x480 lcd console (overscan 0x0)
dotclock: 27000kHz = 27000kHz: (1 * 3MHz * 54) / 6
In: serial@01c28000
Out: serial@01c28000
Err: serial@01c28000
CPU: Allwinner V3s (SUN8I 1681)
Model: Lichee Pi Zero
DRAM: 64 MiB
MMC: SUNXI SD/MMC: 0
SF: Detected w25q128bv with page size 256 Bytes, erase size 64 KiB, total 16 MiB
*** Warning - bad CRC, using default environment
Setting up a 800x480 lcd console (overscan 0x0)
dotclock: 27000kHz = 27000kHz: (1 * 3MHz * 54) / 6
In: serial@01c28000
Out: serial@01c28000
Err: serial@01c28000
Net: No ethernet found.
starting USB...
No controllers found
Hit any key to stop autoboot: 0
SF: Detected w25q128bv with page size 256 Bytes, erase size 64 KiB, total 16 MiB
device 0 offset 0x100000, size 0x10000
SF: 65536 bytes @ 0x100000 Read: OK
device 0 offset 0x110000, size 0x400000
SF: 4194304 bytes @ 0x110000 Read: OK
Starting kernel ...
[sun8i_fixup]: From boot, get meminfo:
Start: 0x40000000
Size: 64MB
ion_carveout reserve: 28m@0 28m@0
ion_reserve_common: ion reserve: [0x42400000, 0x44000000]!
[ 0.000000] Booting Linux on physical CPU 0
[ 0.000000] Linux version 3.4.39 (root@bf756b445919) (gcc version 4.6.3 20120201 (prerelease) (crosstool-NG linaro-1.13.1-2012.02-20120222 - Linaro GCC 2012.02) ) #23 Mon Nov 27 06:38:53 UTC 2017
[ 0.000000] bootconsole [earlycon0] enabled
[ 0.000000] Initialized persistent memory from 41d20800-41d307ff
[ 0.000000] Kernel command line: console=ttyS0,115200 earlyprintk panic=5 rootwait mtdparts=spi32766.0:1M(uboot)ro,64k(script)ro,4M(kernel)ro,-(rootfs) root=/dev/mtdblock3 rw rootfstype=jffs2
[ 0.000000] PID hash table entries: 256 (order: -2, 1024 bytes)
[ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Memory: 64MB = 64MB total
[ 0.000000] Memory: 30672k/30672k available, 34864k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] vmalloc : 0xc4800000 - 0xff000000 ( 936 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xc4000000 ( 64 MB)
[ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB)
[ 0.000000] .text : 0xc0008000 - 0xc043a000 (4296 kB)
[ 0.000000] .init : 0xc043a000 - 0xc045c000 ( 136 kB)
[ 0.000000] .data : 0xc045c000 - 0xc049f680 ( 270 kB)
[ 0.000000] .bss : 0xc049f6a4 - 0xc0538a4c ( 613 kB)
[ 0.000000] NR_IRQS:544
[ 0.000000] Architected local timer running at 24.00MHz.
[ 0.000000] Switching to timer-based delay loop
[ 0.000000] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956ms
[ 0.000000] Console: colour dummy device 80x30
[ 0.014542] Calibrating delay loop (skipped), value calculated using timer frequency.. 4800.00 BogoMIPS (lpj=24000000)
[ 0.022937] pid_max: default: 32768 minimum: 301
[ 0.027770] Mount-cache hash table entries: 512
[ 0.030594] CPU: Testing write buffer coherency: ok
[ 0.035148] Setting up static identity map for 0x40320948 - 0x403209a0
[ 0.040773] devtmpfs: initialized
[ 0.045468] pinctrl core: initialized pinctrl subsystem
[ 0.049177] NET: Registered protocol family 16
[ 0.050397] DMA: preallocated 128 KiB pool for atomic coherent allocations
[ 0.056950] script_sysfs_init success
[ 0.060958] gpiochip_add: registered GPIOs 0 to 223 on device: sunxi-pinctrl
[ 0.068176] sunxi-pinctrl sunxi-pinctrl: initialized sunXi PIO driver
[ 0.070433] gpiochip_add: registered GPIOs 1024 to 1031 on device: axp-pinctrl
[ 0.078176] persistent_ram: found existing buffer, size 24824, start 24824
[ 0.200017] console [ram-1] enabled
[ 0.200591] Not Found clk pll_isp in script
[ 0.202410] Not Found clk pll_video in script
[ 0.207018] Not Found clk pll_ve in script
[ 0.210016] Not Found clk pll_periph0 in script
[ 0.214773] Not Found clk pll_de in script
[ 0.223234] bio: create slab <bio-0> at 0
[ 0.223685] pwm module init!
[ 0.228492] SCSI subsystem initialized
[ 0.229903] usbcore: registered new interface driver usbfs
[ 0.230106] usbcore: registered new interface driver hub
[ 0.235596] usbcore: registered new device driver usb
[ 0.240159] twi_chan_cfg()340 - [twi0] has no twi_regulator.
[ 0.245813] twi_chan_cfg()340 - [twi1] has no twi_regulator.
[ 0.250526] Linux video capture interface: v2.00
[ 0.254901] gpiochip_add: gpios 1024..1028 (axp_pin) failed to register
[ 0.260397] Advanced Linux Sound Architecture Driver Version 1.0.25.
[ 0.267305] Switching to clocksource arch_sys_counter
[ 0.281153] NET: Registered protocol family 2
[ 0.281715] IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.287446] TCP established hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.294349] TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.300690] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.306955] TCP: reno registered
[ 0.310263] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.316258] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.322804] NET: Registered protocol family 1
[ 0.327425] standby_mode = 1.
[ 0.330049] wakeup src cnt is : 3.
[ 0.333582] pmu1_enable = 0x0.
[ 0.336881] config_pmux_para: script_parser_fetch err.
[ 0.342070] pmu2_enable = 0x0.
[ 0.345264] add_sys_pwr_dm: get ldo name failed
[ 0.349957] add_sys_pwr_dm: get ldo name failed
[ 0.354453] add_sys_pwr_dm: get ldo name failed
[ 0.359142] add_sys_pwr_dm: get ldo name failed
[ 0.363642] add_sys_pwr_dm: get ldo name failed
[ 0.368227] add_sys_pwr_dm: get ldo name failed
[ 0.372934] add_sys_pwr_dm: get ldo name failed
[ 0.377413] add_sys_pwr_dm: get ldo name failed
[ 0.382120] add_sys_pwr_dm: get ldo name failed
[ 0.386599] add_sys_pwr_dm: get ldo name failed
[ 0.391198] after inited: sys_mask config = 0x0.
[ 0.396066] dynamic_standby enalbe = 0x0.
[ 0.400181] sunxi_reg_init enter
[ 0.405385] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.409463] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
[ 0.416837] msgmni has been set to 59
[ 0.421265] io scheduler noop registered
[ 0.424136] io scheduler deadline registered
[ 0.428640] io scheduler cfq registered (default)
[ 0.433742] [DISP]disp_module_init
[ 0.437149] cmdline,disp=
[ 0.440186] [DISP] disp_get_rotation_sw,line:68:disp 0 out of range? g_rot_sw=0
[ 0.446745] [DISP] disp_init_connections,line:289:NULL pointer: 0, 0
[ 0.454794] [DISP] Fb_map_kernel_logo,line:924:Fb_map_kernel_logo failed!
[ 0.462548] [DISP] disp_sys_power_enable,line:387:some error happen, fail to get regulator
[ 0.468416] [DISP] disp_sys_gpio_set_value,line:374:OSAL_GPIO_DevWRITE_ONEPIN_DATA, hdl is NULL
[ 0.477353] [DISP]disp_module_init finish
[ 0.481596] sw_uart_get_devinfo()1503 - uart0 has no uart_regulator.
[ 0.488157] uart0: ttyS0 at MMIO 0x1c28000 (irq = 32) is a SUNXI
[ 0.493777] sw_uart_pm()890 - uart0 clk is already enable
[ 0.499297] sw_console_setu[ 0.508034] console [ttyS0] enabled, bootconsole disabled
[ 0.508034] console [ttyS0] enabled, bootconsole disabled
[ 0.515942] sunxi_spi_chan_cfg()1376 - [spi-0] has no spi_regulator.
[ 0.527590] spi spi0: master is unqueued, this is deprecated
[ 0.534254] m25p_probe()988 - Use the Dual Mode Read.
[ 0.540124] m25p80 spi0.0: found W25q128, expected at25df641
[ 0.546639] m25p80 spi0.0: W25q128 (16384 Kbytes)
[ 0.552353] Creating 4 MTD partitions on "spi0.0":
[ 0.557911] 0x000000000000-0x000000100000 : "uboot"
[ 0.564635] 0x000000100000-0x000000110000 : "script"
[ 0.571423] 0x000000110000-0x000000510000 : "kernel"
[ 0.578020] 0x000000510000-0x000001000000 : "rootfs"
[ 0.584964] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.612598] sunxi-ehci sunxi-ehci.1: SW USB2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.621840] sunxi-ehci sunxi-ehci.1: new USB bus registered, assigned bus number 1
[ 0.630635] sunxi-ehci sunxi-ehci.1: irq 104, io mem 0xf1c1a000
[ 0.650041] sunxi-ehci sunxi-ehci.1: USB 0.0 started, EHCI 1.00
[ 0.657659] hub 1-0:1.0: USB hub found
[ 0.662040] hub 1-0:1.0: 1 port detected
[ 0.667035] sunxi-ehci sunxi-ehci.1: remove, state 1
[ 0.672829] usb usb1: USB disconnect, device number 1
[ 0.679403] sunxi-ehci sunxi-ehci.1: USB bus 1 deregistered
[ 0.685886] [DISP] disp_lcd_pwm_enable,line:1021:pwm device hdl is NULL
[ 0.703736] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.730959] sunxi-ohci sunxi-ohci.1: SW USB2.0 'Open' Host Controller (OHCI) Driver
[ 0.739642] sunxi-ohci sunxi-ohci.1: new USB bus registered, assigned bus number 1
[ 0.748337] sunxi-ohci sunxi-ohci.1: irq 105, io mem 0xf1c1a400
[ 0.814780] hub 1-0:1.0: USB hub found
[ 0.819088] hub 1-0:1.0: 1 port detected
[ 0.824069] sunxi-ohci sunxi-ohci.1: remove, state 1
[ 0.829848] usb usb1: USB disconnect, device number 1
[ 0.836289] sunxi-ohci sunxi-ohci.1: USB bus 1 deregistered
[ 0.852869] Initializing USB Mass Storage driver...
[ 0.858501] usbcore: registered new interface driver usb-storage
[ 0.865431] USB Mass Storage support registered.
[ 0.871076] file system registered
[ 0.876824] android_usb gadget: Mass Storage Function, version: 2009/09/11
[ 0.884754] android_usb gadget: Number of LUNs=1
[ 0.890108] lun0: LUN: removable file: (no medium)
[ 0.896346] android_usb gadget: android_usb ready
[ 0.901868] sunxikbd_script_init: key para not found, used default para.
[ 0.910909] sunxi-rtc sunxi-rtc: rtc core: registered sunxi-rtc as rtc0
[ 0.919467] platform reg-20-cs-dcdc2: Driver reg-20-cs-dcdc2 requests probe deferral
[ 0.928535] platform reg-20-cs-dcdc3: Driver reg-20-cs-dcdc3 requests probe deferral
[ 0.937552] platform reg-20-cs-ldo1: Driver reg-20-cs-ldo1 requests probe deferral
[ 0.946223] platform reg-20-cs-ldo2: Driver reg-20-cs-ldo2 requests probe deferral
[ 0.955007] platform reg-20-cs-ldo3: Driver reg-20-cs-ldo3 requests probe deferral
[ 0.963773] platform reg-20-cs-ldo4: Driver reg-20-cs-ldo4 requests probe deferral
[ 0.972461] platform reg-20-cs-ldoio0: Driver reg-20-cs-ldoio0 requests probe deferral
[ 0.981595] sunxi_wdt_init_module: sunxi WatchDog Timer Driver v1.0
[ 0.989005] sunxi_wdt_probe: devm_ioremap return wdt_reg 0xf1c20ca0, res->start 0x01c20ca0, res->end 0x01c20cbf
[ 1.000508] sunxi_wdt_probe: initialized (g_timeout=16s, g_nowayout=0)
[ 1.008202] wdt_enable, write reg 0xf1c20cb8 val 0x00000000
[ 1.014657] wdt_set_tmout, write 0x000000b0 to mode reg 0xf1c20cb8, actual timeout 16 sec
[ 1.030558] sunxi_leds_fetch_sysconfig_para leds is not used in config
[ 1.037999] =========script_get_err============
[ 1.043379] usbcore: registered new interface driver usbhid
[ 1.049747] usbhid: USB HID core driver
[ 1.054926] ashmem: initialized
[ 1.058688] logger: created 256K log 'log_main'
[ 1.064074] logger: created 32K log 'log_events'
[ 1.069414] logger: created 32K log 'log_radio'
[ 1.074813] logger: created 32K log 'log_system'
[ 1.085076] script_get_item return type err, consider it no ldo
[ 1.091944] *******************Try sdio*******************
[ 1.099154] asoc: sndcodec <-> sunxi-codec mapping ok
[ 1.107244] TCP: cubic registered
[ 1.111119] *******************Try sd *******************
[ 1.117222] NET: Registered protocol family 17
[ 1.122563] VFP support v0.3: [mmc]: *** sunxi_mci_dump_errinfo(L826): smc 0 err, cmd 55, RTO !!
[ 1.132757] ThumbEE CPU extension supported.
[ 1.137719] Registering SWP/SWPB emulation handler
[ 1.144032] *******************Try mmc*******************
[ 1.150487] platform reg-20-cs-ldoio0: Driver reg-20-cs-ldoio0 requests probe deferral
[ 1.159427] platform reg-20-cs-ldo4: Driver reg-20-cs-ldo4 requests probe deferral
[ 1.168304] platform reg-20-cs-ldo3: Driver reg-20-cs-ldo3 requests probe deferral
[ 1.177192] platform reg-20-cs-ldo2: Driver reg-20-cs-ldo2 requests probe deferral
[ 1.186878] platform reg-20-cs-ldo1: Driver reg-20-cs-ldo1 requests probe deferral
[ 1.196829] platform reg-20-cs-dcdc3: Driver reg-20-cs-dcdc3 requests probe deferral
[ 1.205670] platform reg-20-cs-dcdc2: Driver reg-20-cs-dcdc2 requests probe deferral
[ 1.214732] sunxi-rtc sunxi-rtc: setting system clock to 1970-01-01 04:04:40 UTC (14680)
[ 1.225163] ALSA device list:
[ 1.228696] #0: audiocodec
[ 1.232455] fs_names=/dev/root
[ 1.235999] fs_name=jffs2
[ 1.245400] *******************Try sdio*******************
[ 1.256367] *******************Try sd *******************
[ 1.267056] *******************Try mmc*******************
[ 1.329128] *******************Try sdio*******************
[ 1.342075] *******************Try sd *******************
[ 1.354874] *******************Try mmc*******************
[ 1.407233] *******************Try sdio*******************
[ 1.418090] *******************Try sd *******************
[ 1.428749] *******************Try mmc*******************
[ 1.485235] *******************Try sdio*******************
[ 1.505780] mmc1: new high speed SDIO card at address 0001
[ 1.512714] *******************sdio init ok*******************
[ 3.628556] VFS: Mounted root (jffs2 filesystem) on device 31:3.
[ 3.635449] err=0
[ 3.638311] devtmpfs: mounted
[ 3.641908] Freeing init memory: 136K
Starting logging: OK
Starting mdev...
modprobe: can't change directory to '/lib/modules': No such file or directory
Initializing random number generator... done.
Starting network: OK
Welcome to Lichee Pi
Lichee login:
~~~
- 前言
- 荔枝派TODO任务领取
- linux使用小贴士
- 入门篇
- 板卡介绍
- 开箱指南
- 烧录启动系统
- 联网方法
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- 外设操作
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- BSP Linux内核编译.md
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- 根文件系统定制
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- openwrt定制系统
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- camdriod开发
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- 主线Uboot引导Camdriod
- 系统镜像打包
- XBOOT适配
- 荔枝运行XBOOT
- 应用篇
- 游戏机-基于EmulationStation
- 游戏机-gnuboy
- 语音识别-科大讯飞云
- GUI-QT5
- 语音识别-离线关键词识别
- 路由器-Lichee Zero
- 投稿文章
- 荔枝派Zero开箱指南
- Zero i2c oled使用指南
- zero SPI LCD使用指南
- Zero u-boot编译和使用指南
- TF WiFi使用方法
- Zero Ethernet使用指南
- Zero 移植Qt5.4.1
- ZeroSpiNorFlash启动系统制作指南
- Visio-uboot-sunxi流程
- lichee 编译踩坑记录(ilichee ZERO)
- lichee_zero_外设GPIO接口
- TF WIFI 小白编
- 从零开始LicheePi Zero的开发
- 认识Zero的硬件
- 搭建Zero的开发环境
- 主线Uboot
- 主线kernel
- BSP kernel
- BSP内核启动
- bsp内核的摄像头使用
- BSP内核中的保留内存
- uboot启动BSP内核常见错误
- BSP内核 FBTFT移植
- BSP内核启动错误及警告解决
- buildroot 根文件系统
- emdebian 根文件系统
- SPI Flash 系统编译
- sunxi-fel增加对16M 以上flash的支持
- overlayfs的使用
- jffs2系统挂载不上的常见原因
- JFFS2 文件系统简介
- uboot对spi flash的识别
- bsp内核的SPI flash启动
- Docker开发环境
- Docker 命令速查
- 基础ubuntu系统配置
- docker离线镜像
- Zero系统烧录
- dd镜像烧录
- 分区镜像烧录
- SPI Flash系统烧录
- 一键镜像烧录
- Zero外设把玩
- I2C操作
- PWM输出
- CODEC的使用
- 以太网使用指南
- GPIO操作
- 文件IO方式
- C语言接口(mmap)
- Python操作GPIO
- pinctrl-sunxi介绍
- UART操作
- 点屏
- 点屏之RGB屏
- 点屏之SPI屏 ili9341
- 点屏之SPI OLED
- 点屏之I2C OLED
- 点屏之SPI屏 ili9488
- 点屏之MCU屏
- 点屏之触摸屏驱动
- 点屏之simple-framebuffer
- 点屏之屏幕时序
- 时钟控制器CCM
- 摄像头
- BSP DVP摄像头
- BSP MIPI 摄像头
- 主线DVP摄像头
- 主线 MIPI摄像头
- SPI 操作
- 应用层开发
- 开机自启动
- Segment Fault调试
- Zero通过OTG共享PC网络
- USB摄像头使用
- 基于QT的GUI开发
- 移植tslib
- 移植QT5.9.1
- 移植QT4.8.7
- QtCreator使用
- Qt5.x移植到Qt4.8
- Qt字体相关
- Qt移植总结
- Qt裁剪
- Qt去除鼠标指针显示
- zero_imager使用
- 驱动开发
- 设备树简介
- GPU/DRM 显示驱动
- sys下设备树查看
- atmel触摸屏驱动分析
- atmel触摸屏中断改轮询
- uboot下gpio操作
- helloworld驱动编译演示
- FBTFT分析
- 内核模块静态加载的顺序
- SPI驱动分析
- SPI 驱动编写
- Uboot开发
- 开机logo
- 看门狗的使用
- 关于系统reboot
- 内核printk等级设置