新出的STM32F750成功运行Linux

htjgdw

前段时间ST推出了Value Line的STM32F750和H750两个系列，看了一下选型表，F750有LQFP144封装，正好适合我的STM32 linux板子。
于是，双十一买了几片。同时，我对我的linux板做了小幅改版：将SPI Flash容量扩大到32MB并连接到F750的QSPI BANK1，添加了CAN收发器和接口，增加了两个I2C外设（温湿度传感器和气压传感器）。板子做回来后先焊了一片，调试过程还算比较顺利，现在u-boot和Linux都工作起来了，下面是系统启动log，F750速度还是相当快的（427.62 BogoMIPS，F429跑Linux只有35.84 BogoMIPS），QSPI的加载速度也很给力。下一步我准备多测试几种STM32外设的Linux driver，emcraft现在的SDK比两三年前多了不少外设驱动，可以都试试看。

1. 
   
2. U-Boot 2010.03 (Nov 26 2018 - 21:30:21)
   
3. 
   
4. CPU  : STM32F7 (Cortex-M7)
   
5. Freqs: SYSCLK=216MHz,HCLK=216MHz,PCLK1=54MHz,PCLK2=108MHz
   
6. Board: STM32F750 Rev 1.0, www.emcraft.com
   
7. DRAM:  64 MB
   
8. In:    serial
   
9. Out:   serial
   
10. Err:   serial
    
11. QSPI:  32 MB mapped at 0x90000000
    
12. Net:   miiphy_register done.
    
13. eth hw init done.
    
14. STM32_MAC
    
15. Hit any key to stop autoboot:  0
    
16. Booting from QSPI
    
17. ## Booting kernel from Legacy Image at c0007fc0 ...
    
18.    Image Name:   Linux-4.2.0
    
19.    Image Type:   ARM Linux Multi-File Image (uncompressed)
    
20.    Data Size:    7496295 Bytes =  7.1 MB
    
21.    Load Address: c0008000
    
22.    Entry Point:  c0008001
    
23.    Contents:
    
24.       Image 0: 7471388 Bytes =  7.1 MB
    
25.       Image 1: 24895 Bytes = 24.3 kB
    
26.    Verifying Checksum ... OK
    
27. ## Flattened Device Tree from multi component Image at C0007FC0
    
28.    Booting using the fdt at 0xc0728128
    
29.    Loading Multi-File Image ... OK
    
30. OK
    
31. WARNING: legacy format multi component image overwritten
    
32.    Loading Device Tree to c3ff6000, end c3fff13e ... OK
    
33. 
    
34. Starting kernel ...
    
35. 
    
36. Booting Linux on physical CPU 0x0
    
37. Linux version 4.2.0 (hw@localhost.localdomain) (gcc version 4.4.1 (Sourcery G++ Lite 2010
    
38. q1-189) ) #90 Tue Dec 4 03:32:33 EST 2018
    
39. CPU: ARMv7-M [410fc271] revision 1 (ARMv7M), cr=00000000
    
40. CPU: WBA data cache, WBA instruction cache
    
41. Machine model: EmCraft Systems STM32F7-SOM board
    
42. Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
    
43. Kernel command line: stm32_platform=stm32f7-disco console=ttyS0,115200 panic=10 ip=169.25
    
44. 4.1.10:169.254.1.2:::stm32f7-disco:eth0:off
    
45. PID hash table entries: 256 (order: -2, 1024 bytes)
    
46. Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
    
47. Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
    
48. Memory: 56432K/65536K available (2523K kernel code, 181K rwdata, 588K rodata, 4000K init,
    
49. 111K bss, 9104K reserved, 0K cma-reserved)
    
50. Virtual kernel memory layout:
    
51.     vector  : 0x00000000 - 0x00001000   (   4 kB)
    
52.     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    
53.     vmalloc : 0x00000000 - 0xffffffff   (4095 MB)
    
54.     lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
    
55.       .text : 0xc0008000 - 0xc0312000   (3112 kB)
    
56.       .init : 0xc0312000 - 0xc06fa000   (4000 kB)
    
57.       .data : 0xc06fa000 - 0xc07277c0   ( 182 kB)
    
58.        .bss : 0xc072811c - 0xc0743e84   ( 112 kB)
    
59. NR_IRQS:16 nr_irqs:16 16
    
60. /interrupt-controller@40013c00: 24 External IRQs detected
    
61. clocksource: arm_system_timer: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 27651335
    
62. 8 ns
    
63. ARM System timer initialized as clocksource
    
64. /soc/timer@40000000: STM32 clockevent driver initialized (32 bits)
    
65. sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
    
66. Calibrating delay loop... 427.62 BogoMIPS (lpj=2138112)
    
67. pid_max: default: 4096 minimum: 301
    
68. Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
    
69. Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
    
70. devtmpfs: initialized
    
71. clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275
    
72. 0000 ns
    
73. pinctrl core: initialized pinctrl subsystem
    
74. NET: Registered protocol family 16
    
75. stm32-pinctrl pin-controller: nbanks = 11
    
76. stm32-pinctrl pin-controller: nfunctions = 20
    
77. stm32-pinctrl pin-controller: ngroups = 23
    
78. stm32-pinctrl pin-controller: GPIOA bank added.
    
79. stm32-pinctrl pin-controller: GPIOB bank added.
    
80. stm32-pinctrl pin-controller: GPIOC bank added.
    
81. stm32-pinctrl pin-controller: GPIOD bank added.
    
82. stm32-pinctrl pin-controller: GPIOE bank added.
    
83. stm32-pinctrl pin-controller: GPIOF bank added.
    
84. stm32-pinctrl pin-controller: GPIOG bank added.
    
85. stm32-pinctrl pin-controller: GPIOH bank added.
    
86. stm32-pinctrl pin-controller: GPIOI bank added.
    
87. stm32-pinctrl pin-controller: GPIOJ bank added.
    
88. stm32-pinctrl pin-controller: GPIOK bank added.
    
89. stm32-pinctrl pin-controller: Function[0         name:i2c_1,    groups:1]
    
90. stm32-pinctrl pin-controller: Function[1         name:i2c_2,    groups:1]
    
91. stm32-pinctrl pin-controller: Function[2         name:i2c_3,    groups:1]
    
92. stm32-pinctrl pin-controller: Function[3         name:mac,      groups:2]
    
93. stm32-pinctrl pin-controller: Function[4         name:sdio,     groups:1]
    
94. stm32-pinctrl pin-controller: Function[5         name:spi_2,    groups:1]
    
95. stm32-pinctrl pin-controller: Function[6         name:spi_4,    groups:1]
    
96. stm32-pinctrl pin-controller: Function[7         name:spi_5,    groups:1]
    
97. stm32-pinctrl pin-controller: Function[8         name:usart1,   groups:1]
    
98. stm32-pinctrl pin-controller: Function[9         name:usart6,   groups:1]
    
99. stm32-pinctrl pin-controller: Function[10        name:usart7,   groups:1]
    
100. stm32-pinctrl pin-controller: Function[11        name:usb_fs,   groups:1]
     
101. stm32-pinctrl pin-controller: Function[12        name:usb_hs,   groups:1]
     
102. stm32-pinctrl pin-controller: Function[13        name:can_1,    groups:1]
     
103. stm32-pinctrl pin-controller: Function[14        name:adc1_in0_pin,     groups:1]
     
104. stm32-pinctrl pin-controller: Function[15        name:dac_out2_pin,     groups:1]
     
105. stm32-pinctrl pin-controller: Function[16        name:ltdc,     groups:1]
     
106. stm32-pinctrl pin-controller: Function[17        name:sai_2,    groups:1]
     
107. stm32-pinctrl pin-controller: Function[18        name:i2c_4,    groups:1]
     
108. stm32-pinctrl pin-controller: Function[19        name:gpio,     groups:3]
     
109. stm32-dma 40026000.dma: STM32 DMA driver registered
     
110. stm32-dma 40026400.dma: STM32 DMA driver registered
     
111. SCSI subsystem initialized
     
112. usbcore: registered new interface driver usbfs
     
113. usbcore: registered new interface driver hub
     
114. usbcore: registered new device driver usb
     
115. soc:phy_hs supply vcc not found, using dummy regulator
     
116. soc:phy_fs supply vcc not found, using dummy regulator
     
117. pps_core: LinuxPPS API ver. 1 registered
     
118. pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
     
119. PTP clock support registered
     
120. Advanced Linux Sound Architecture Driver Initialized.
     
121. Bluetooth: Core ver 2.20
     
122. NET: Registered protocol family 31
     
123. Bluetooth: HCI device and connection manager initialized
     
124. Bluetooth: HCI socket layer initialized
     
125. Bluetooth: L2CAP socket layer initialized
     
126. Bluetooth: SCO socket layer initialized
     
127. clocksource: Switched to clocksource arm_system_timer
     
128. NET: Registered protocol family 2
     
129. TCP established hash table entries: 1024 (order: 0, 4096 bytes)
     
130. TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
     
131. TCP: Hash tables configured (established 1024 bind 1024)
     
132. UDP hash table entries: 256 (order: 0, 4096 bytes)
     
133. UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
     
134. NET: Registered protocol family 1
     
135. RPC: Registered named UNIX socket transport module.
     
136. RPC: Registered udp transport module.
     
137. RPC: Registered tcp transport module.
     
138. RPC: Registered tcp NFSv4.1 backchannel transport module.
     
139. Power Management for STM32
     
140. futex hash table entries: 16 (order: -5, 192 bytes)
     
141. jffs2: version 2.2. (NAND) (SUMMARY)  漏 2001-2006 Red Hat, Inc.
     
142. fuse init (API version 7.23)
     
143. Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)
     
144. io scheduler noop registered
     
145. io scheduler cfq registered (default)
     
146. stm32-pinctrl pin-controller: maps: function gpio group pwms num 2
     
147. stm32-pwm pwm0: basing on TIM3.1(x16)
     
148. stm32-pinctrl pin-controller: maps: function ltdc group ltdc-0 num 29
     
149. stm32_lcdfb 40016800.ltdc: fb0: fb device registered successfully
     
150. STM32 USART driver initialized
     
151. stm32-pinctrl pin-controller: maps: function usart1 group usart1-0 num 3
     
152. 40011000.serial: ttyS0 at MMIO 0x40011000 (irq = 34, base_baud = 6750000) is a stm32-usar
     
153. t
     
154. console [ttyS0] enabled
     
155. stm32-pinctrl pin-controller: maps: function usart6 group usart6-0 num 3
     
156. 40011400.serial: ttyS5 at MMIO 0x40011400 (irq = 35, base_baud = 6750000) is a stm32-usar
     
157. t
     
158. nbd: registered device at major 43
     
159. stm32-pinctrl pin-controller: maps: function dac_out2_pin group dac-0 num 2
     
160. stm32_dac 40007400.dac: dac1: no timer assigned, DMA functionality is not available
     
161. stm32_dac 40007400.dac: created 1 character devices with MAJOR 248
     
162. 2 ofpart partitions found on MTD device physmap-stm-flash.0
     
163. Creating 2 MTD partitions on "physmap-stm-flash.0":
     
164. 0x000000000000-0x000000020000 : "stm_flash_uboot"
     
165. 0x000000040000-0x000000100000 : "stm_flash_unused"
     
166. stm32-pinctrl pin-controller: maps: function spi_5 group spi_5-0 num 4
     
167. stm32-spi 40015000.spi: SPI Controller 4 at 40015000,irq=38,hz=108000000
     
168. CAN device driver interface
     
169. stm32-pinctrl pin-controller: maps: function can_1 group can_1-0 num 3
     
170. stm32-can 40006400.can: device registered (reg=40006400, irq=31)
     
171. stm32-pinctrl pin-controller: maps: function mac group mac_rmii num 10
     
172. stmmac - user ID: 0x10, Synopsys ID: 0x35
     
173. Ring mode enabled
     
174. DMA HW capability register supported
     
175. Enhanced/Alternate descriptors
     
176.         Enabled extended descriptors
     
177. RX Checksum Offload Engine supported (type 2)
     
178. TX Checksum insertion supported
     
179. Wake-Up On Lan supported
     
180. Enable RX Mitigation via HW Watchdog Timer
     
181. stm32-dwmac 40028000.ethernet eth0: No MDIO subnode found
     
182. libphy: stmmac: probed
     
183. eth0: PHY ID 0007c0f1 at 0 IRQ POLL (stmmac-0:00) active
     
184. PPP generic driver version 2.4.2
     
185. PPP BSD Compression module registered
     
186. PPP Deflate Compression module registered
     
187. usbcore: registered new interface driver rt2800usb
     
188. stm32-pinctrl pin-controller: maps: function usb_hs group usb_hs-0 num 3
     
189. dwc2 40040000.usb: DWC OTG Controller
     
190. dwc2 40040000.usb: new USB bus registered, assigned bus number 1
     
191. dwc2 40040000.usb: irq 56, io mem 0x00000000
     
192. usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
     
193. usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
     
194. usb usb1: Product: DWC OTG Controller
     
195. usb usb1: Manufacturer: Linux 4.2.0 dwc2_hsotg
     
196. usb usb1: SerialNumber: 40040000.usb
     
197. hub 1-0:1.0: USB hub found
     
198. hub 1-0:1.0: 1 port detected
     
199. stm32-pinctrl pin-controller: maps: function usb_fs group usb_fs-0 num 3
     
200. 50000000.usb supply vusb_d not found, using dummy regulator
     
201. 50000000.usb supply vusb_a not found, using dummy regulator
     
202. dwc2 50000000.usb: EPs: 6, dedicated fifos, 512 entries in SPRAM
     
203. dwc2 50000000.usb: DCFG=0x08200000, DCTL=0x00000002, DIEPMSK=0000000b
     
204. dwc2 50000000.usb: GAHBCFG=0x00000000, GHWCFG1=0x00000000
     
205. dwc2 50000000.usb: GRXFSIZ=0x000000a0, GNPTXFSIZ=0x004000a0
     
206. dwc2 50000000.usb: DPTx[1] FSize=32, StAddr=0x000000e0
     
207. dwc2 50000000.usb: DPTx[2] FSize=64, StAddr=0x00000100
     
208. dwc2 50000000.usb: DPTx[3] FSize=512, StAddr=0x00000800
     
209. dwc2 50000000.usb: DPTx[4] FSize=512, StAddr=0x00000a00
     
210. dwc2 50000000.usb: DPTx[5] FSize=512, StAddr=0x00000c00
     
211. dwc2 50000000.usb: ep0-in: EPCTL=0x00008000, SIZ=0x00000000, DMA=0x5abee5fb
     
212. dwc2 50000000.usb: ep0-out: EPCTL=0x00008000, SIZ=0x00000000, DMA=0x5abee5fb
     
213. dwc2 50000000.usb: ep1-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
214. dwc2 50000000.usb: ep1-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
215. dwc2 50000000.usb: ep2-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
216. dwc2 50000000.usb: ep2-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
217. dwc2 50000000.usb: ep3-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
218. dwc2 50000000.usb: ep3-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
219. dwc2 50000000.usb: ep4-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
220. dwc2 50000000.usb: ep4-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
221. dwc2 50000000.usb: ep5-in: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
222. dwc2 50000000.usb: ep5-out: EPCTL=0x00000000, SIZ=0x00000000, DMA=0x5abee5fb
     
223. dwc2 50000000.usb: DVBUSDIS=0x000017d7, DVBUSPULSE=000005b8
     
224. usbcore: registered new interface driver cdc_acm
     
225. cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
     
226. usbcore: registered new interface driver uas
     
227. usbcore: registered new interface driver usb-storage
     
228. g_serial gadget: Gadget Serial v2.4
     
229. g_serial gadget: g_serial ready
     
230. dwc2 50000000.usb: bound driver g_serial
     
231. i2c /dev entries driver
     
232. stm32-pinctrl pin-controller: maps: function i2c_4 group i2c_4-0 num 3
     
233. bmp085 3-0077: Successfully initialized bmp085!
     
234. stm32f7-i2c 40006000.i2c: I2C Controller i2c-3 at 40006000,irq=58
     
235. Driver for 1-wire Dallas network protocol.
     
236. usbcore: registered new interface driver btusb
     
237. stm32-pinctrl pin-controller: maps: function sdio group sdio-0 num 7
     
238. mmci-pl18x 40012c00.sdi: Got CD GPIO
     
239. mmci-pl18x 40012c00.sdi: mmc0: PL180 manf 80 rev4 at 0x40012c00 irq 37,0 (pio)
     
240. stm32-dma 40026400.dma: stm32_dma_of_xlate: unable to get channel 3 - was already request
     
241. ed
     
242. mmci-pl18x 40012c00.sdi: DMA channels RX dma1chan3, TX dma1chan3
     
243. stm32_gpio_to_irq: Event line 3 now points to fire interrupts from bank G
     
244. stm32-pinctrl pin-controller: maps: function gpio group outs num 2
     
245. hidraw: raw HID events driver (C) Jiri Kosina
     
246. usbcore: registered new interface driver usbhid
     
247. usbhid: USB HID core driver
     
248. stm32-pinctrl pin-controller: maps: function adc1_in0_pin group adc1-0 num 2
     
249. stm32f4-adc 40012000.adc: registered
     
250. stm32-pinctrl pin-controller: maps: function sai_2 group sai_2-0 num 5
     
251. stm32-dma 40026400.dma: stm32_dma_of_xlate: unable to get channel 4 - was already request
     
252. ed
     
253. stm32-asoc-card sound: failed to find codec platform device
     
254. stm32-asoc-card: probe of sound failed with error -22
     
255. NET: Registered protocol family 17
     
256. can: controller area network core (rev 20120528 abi 9)
     
257. NET: Registered protocol family 29
     
258. can: raw protocol (rev 20120528)
     
259. can: broadcast manager protocol (rev 20120528 t)
     
260. can: netlink gateway (rev 20130117) max_hops=1
     
261. Bluetooth: RFCOMM TTY layer initialized
     
262. Bluetooth: RFCOMM socket layer initialized
     
263. Bluetooth: RFCOMM ver 1.11
     
264. hctosys: unable to open rtc device (rtc0)
     
265. vmmc: disabling
     
266. ALSA device list:
     
267.   No soundcards found.
     
268. Freeing unused kernel memory: 4000K (c0312000 - c06fa000)
     
269. init started: BusyBox v1.24.2 (2018-11-22 20:35:58 EST)
     
270. / # amixer: Mixer attach default error: No such file or directory
     
271. stm32-dwmac 40028000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
     
272. 
     
273. / # free
     
274.              total       used       free     shared    buffers     cached
     
275. Mem:         60432       8140      52292          0          0       4792
     
276. -/+ buffers/cache:       3348      57084
     
277. / #

复制代码

honami520

做的还是挺不错的。看来750还是很厉害啊，比429快10倍呢

htjgdw

honami520 发表于 2018-12-4 21:56
做的还是挺不错的。看来750还是很厉害啊，比429快10倍呢

是啊，这就是有了L1 cache的威力。

casterbn

楼主厉害

ztg328

f7的Linux和arm9的Linux相比有哪些优势

wmm20031015

顶楼主！！！

qzh

这个运行起来真不容易

kevinchen026

高手厉害 Linux

wye11083

这片子我记得没有mmu啊。

dwj0

空板子还有吗？转让一块

FireBrain

没有mmu，能运行Linux 常用软件吗

Excellence

厉害，顶顶。

zhang0352505

厉害了，佩服佩服

leiyitan

总是有人问，你用stm32跑Linux有意义么？
细思一下，其实大可不必这么去思考这个问题，因为这个世界需要更多别人去做你所认为没有意义的事。
感谢楼主分享！

浮华一生

ztg328 发表于 2018-12-4 22:24
f7的Linux和arm9的Linux相比有哪些优势

有没有MMU 我觉得差别还是大。 有时候写程序 还是有限制

Jmhh247

楼主，上板子图片啊，我是来看无码高清图的

日日♂夜夜

和arm9比
优势是快 很快
劣势是没有mmu,然后很多应用要重新编译甚至有的必须修改源码

htjgdw

wye11083 发表于 2018-12-4 23:59
这片子我记得没有mmu啊。

Linux早已支持no-MMU选项（适用于Cortex-M，AVR32等单片机），在编译kernel时选上这项就可以了。
没有MMU就不能运行Linux的历史早就结束了。

当然了，在STM32 Linux上运行应用程序需要把app源码拿来重新编译即可，就像在其他架构的CPU上适配Linux应用一样。

brightchl

emcraft是uclinux

htjgdw

Jmhh247 发表于 2018-12-5 08:48
楼主，上板子图片啊，我是来看无码高清图的

找我以前的帖子，里面有。新的F750只是在旧版的基础上做了微小的调整。

ttyyuuio

楼主厉害，不过这片子跑linux芯片价格成本有点高

minier

这是各振奋的消息

htjgdw

brightchl 发表于 2018-12-5 09:25
emcraft是uclinux

uClinux是十几年前的东西了。那时的Linux内核不支持没有MMU的处理器，国外有大神把Linux代码改写重新实现了一遍，以适应无MMU的处理器（那时主要是ARM7），这个版本的Linux起名叫做uClinux并发布了（现在www.uclinux.org还有）。
我用的emcraft linux是在Linux4.2内核基础上增加了更适应Cortex-M的支持（比如增加STM32外设驱动等），你可以把它也叫做uClinux，但是和十几年前的已经不是一个东西了，唯一相同点就是都在没有MMU的处理器上运行。

现在Linux主线内核直接支持no-MMU选项，感兴趣的可以上网下载linux内核源码看看。所以不用单独为了单片机再出一个分支了。

albert_w

感觉很有点意思, 而且可以支持这么高的内核版本

brightchl

htjgdw 发表于 2018-12-5 09:41
uClinux是十几年前的东西了。那时的Linux内核不支持没有MMU的处理器，国外有大神把Linux代码改写重新实现 ...

学习了，没有MMU会限制这么功能吗？

蛋定

不明觉厉

overheat

htjgdw 发表于 2018-12-5 09:41
uClinux是十几年前的东西了。那时的Linux内核不支持没有MMU的处理器，国外有大神把Linux代码改写重新实现 ...

涨姿势！
No-MMU什么时候合并进主分支的？

htjgdw

overheat 发表于 2018-12-5 10:52
涨姿势！
No-MMU什么时候合并进主分支的？

不知道什么时候合并进主线的，反正有几年了。

dragonathust1

涨知识了

starting

QSPI是什么型号的？

starting

跑的那种文件系统呢？ubifs？
不好意思看到了jffs2文件系统

htjgdw

starting 发表于 2018-12-5 15:41
QSPI是什么型号的？

W25Q256
现在还没挂文件系统，就一个initramfs

makathy

入门需要看些啥

fghfguytu

都是高手呀

TKZXJ

涨知识了

netawater

htjgdw 发表于 2018-12-5 09:23
Linux早已支持no-MMU选项（适用于Cortex-M，AVR32等单片机），在编译kernel时选上这项就可以了。
没有MMU ...

没有mmu，没有虚拟内存这点影响大不大？

yulutong

涨知识了

zxq6

linux的软件是不是换个平台需要重新编译才能用？比如ubuntu的换到redhat？而不能像win7换到win10,大部分可以直接用

htjgdw

zxq6 发表于 2018-12-6 22:33
linux的软件是不是换个平台需要重新编译才能用？比如ubuntu的换到redhat？而不能像win7换到win10,大部分可 ...

是的。所以linux软件大都有源码，方便在不同平台和发行版上移植。

mypc16888

感谢楼主分享

yangpeng012

楼主的.config文件能分享一份吗？

lovemini

看起来很高大上的样子

astankvai

不错啊。

amlt_shifu

Zephyr  这个操作系统是 Linux基金会托管的协作项目，可能跟适合 750

htjgdw

amlt_shifu 发表于 2019-4-5 10:41
Zephyr  这个操作系统是 Linux基金会托管的协作项目，可能跟适合 750

好的，有时间了解一下。

sunnylyvoune

楼主你好，想咨询一下，有没有可能在753上跑，linux能不能从sd卡加载

htjgdw

sunnylyvoune 发表于 2019-4-16 15:15
楼主你好，想咨询一下，有没有可能在753上跑，linux能不能从sd卡加载

肯定是可以的啦，只不过需要时间做。