U-Boot - Revision history

Savoundg: /* Where to load the Device Tree Binary? */

2016-07-18T05:52:39Z

Where to load the Device Tree Binary?

← Older revision		Revision as of 05:52, 18 July 2016
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	U-Boot is a bootloader.		U-Boot is a bootloader.

	== Where to load the Device Tree ~~Binary~~? ==		== Where to load the Device Tree Blob? ==
	fdt_high		The Device Tree Blob (DTB) should be loaded memory in a carefully chosen address. Indeed, the DTB can be overwritten by the decompressing kernel image. On ARM-based system, the address of the DTB is passed to the kernel through the register '''r2'''. To ensure the DTB will not be relocated by U-Boot and if the region where the DTB is is writeable, you can set '''fdt_high''' to 0xFFFFFFFF. '''fdt_high''' defines the highest address the DTB could be relocated by U-Boot. It could be useful if the kernel has a limited dedicated memory.

	fdt addr + fdt resize		fdt addr + fdt resize

2016-06-21T06:24:47Z

@@ Line 1: / Line 1: @@
 U-Boot is a bootloader.
 == Communicate with the SST26VF032B<ref>http://ww1.microchip.com/downloads/en/DeviceDoc/20005218B.pdf</ref> ==
 The SST26VF032B contains Block-Protection feature. By default, at reset, all blocks are write-protected and some blocks are read-protected. To be able to write and read into that memory, you have to disable the Block-Protection feature using the WBPR instruction (which requires WREN to be executed before).

2016-05-26T19:00:20Z

2016-05-22T01:11:27Z

Communicate with the SST26VF032B[1]

← Older revision		Revision as of 01:11, 22 May 2016
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	U-Boot is a bootloader.		U-Boot is a bootloader.
	== Communicate with the SST26VF032B<ref>http://ww1.microchip.com/downloads/en/DeviceDoc/20005218B.pdf</ref> ==		== Communicate with the SST26VF032B<ref>http://ww1.microchip.com/downloads/en/DeviceDoc/20005218B.pdf</ref> ==
	The SST26VF032B contains Block-Protection feature. By default, at reset, all blocks are write-protected and some blocks are read-protected. To be able to write and read into that memory, you have to disable the Block-Protection feature using the WBPR instruction (which requires WREN to be ~~executer~~ before).		The SST26VF032B contains Block-Protection feature. By default, at reset, all blocks are write-protected and some blocks are read-protected. To be able to write and read into that memory, you have to disable the Block-Protection feature using the WBPR instruction (which requires WREN to be executed before).
	{\| class="wikitable"		{\| class="wikitable"
	!Instruction		!Instruction

2016-05-22T01:11:02Z

Communicate with the SST26VF032B[1]

← Older revision		Revision as of 01:11, 22 May 2016
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	U-Boot is a bootloader.		U-Boot is a bootloader.
	== Communicate with the SST26VF032B<ref>http://ww1.microchip.com/downloads/en/DeviceDoc/20005218B.pdf</ref> ==		== Communicate with the SST26VF032B<ref>http://ww1.microchip.com/downloads/en/DeviceDoc/20005218B.pdf</ref> ==
			The SST26VF032B contains Block-Protection feature. By default, at reset, all blocks are write-protected and some blocks are read-protected. To be able to write and read into that memory, you have to disable the Block-Protection feature using the WBPR instruction (which requires WREN to be executer before).
	{\| class="wikitable"		{\| class="wikitable"
	!Instruction		!Instruction

2016-05-21T06:10:22Z

Communicate with the SST26VF032B[1]

← Older revision		Revision as of 06:10, 21 May 2016
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	U-Boot is a bootloader.		U-Boot is a bootloader.


	== Communicate with the SST26VF032B<ref>http://ww1.microchip.com/downloads/en/DeviceDoc/20005218B.pdf</ref> ==		== Communicate with the SST26VF032B<ref>http://ww1.microchip.com/downloads/en/DeviceDoc/20005218B.pdf</ref> ==
	{\| class="wikitable"		{\| class="wikitable"
Line 12:		Line 10:
	\|-		\|-
	\|JEDEC-ID		\|JEDEC-ID
	\|		\|JEDEC-ID Read
	\|9FH		\|9FH
	\|32		\|32
Line 92:		Line 90:
	\|20H		\|20H
	\|32		\|32
	\|		\|p. 25
	\|		\|
	\|-		\|-
Line 99:		Line 97:
	\|02H		\|02H
	\|N/A		\|N/A
	\|		\|p. 28
	\|		\|
	\|}		\|}

2016-05-20T05:59:59Z

Add reference

← Older revision		Revision as of 05:59, 20 May 2016
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	== Communicate with the SST26VF032B ==		== Communicate with the SST26VF032B<ref>http://ww1.microchip.com/downloads/en/DeviceDoc/20005218B.pdf</ref> ==
	{\| class="wikitable"		{\| class="wikitable"
	!Instruction		!Instruction

2016-05-19T21:12:24Z

Communicate with the SST26VF032B

← Older revision		Revision as of 21:12, 19 May 2016
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	{\| class="wikitable"		{\| class="wikitable"
	!Instruction		!Instruction
	!		!Description
	!Command cycle		!Command cycle
	!Bitlen		!Bitlen
Line 20:		Line 20:
	\|-		\|-
	\|RDSR		\|RDSR
	\|		\|Read the Status Register
	\|05H		\|05H
	\|16		\|16
	\|p. 10		\|p. 10
	\|U-Boot > sspi 0x7100 16 ~~3500~~		\|U-Boot > sspi 0x7100 16 0500
	~~0008~~		0002
	\|-		\|-
	\|RDCR		\|RDCR
	\|		\|

			Read the Configuration Register
	\|35H		\|35H
	\|16		\|16
	\|		\|
	\|		\|U-Boot > sspi 0x7100 16 3500

			0008
	\|-		\|-
	\|WREN		\|WREN
	\|		\|Write-Enable: required for ULBPR, PP, ...
	\|06H		\|06H
	\|8		\|8
Line 43:		Line 47:
	\|-		\|-
	\|WBPR		\|WBPR
	\|		\|Write Block-Protection Register
	\|42H		\|42H
	\|152		\|152
	\|		\|p. 36
	\|		\|U-Boot > sspi 0x7100 8 06
			00

			U-Boot > sspi 0x7100 152 42000000000000000000000000000000000000

			00000000000000000000000000000000000000
	\|-		\|-
	\|RBPR		\|RBPR
	\|		\|Read Block-Protection Register
	\|72H		\|72H
	\|152		\|152
	\|		\|p. 35
	\|		\|U-Boot > sspi 0x7100 152 72000000000000000000000000000000000000
			00FFFFFFFFFFFFFFFFFFFF0000000000000000
	\|-		\|-
	\|ULBPR		\|ULBPR
	\|		\|Global Block-Protection Unlock
	\|98H		\|98H
	\|8		\|8
	\|		\|p. 39
	\|		\|U-Boot > sspi 0x7100 8 06
			00

			U-Boot > sspi 0x7100 8 98

			00
	\|-		\|-
	\|Read (40MHz)		\|Read (40MHz)
	\|		\|
	\|03H		\|03H
	\|		\|N/A
	\|p. 15		\|p. 15
	\|Read at offset 0 32 bits		\|Read at offset 0 32 bits
	U-Boot > sspi 0x7100 64 0300000000000000		U-Boot > sspi 0x7100 64 0300000000000000

	00000000FFFFFFFF		00000000FFFFFFFF
	\|-		\|-
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	\|20H		\|20H
	\|32		\|32
			\|
			\|
			\|-
			\|PP
			\|Page Program
			\|02H
			\|N/A
	\|		\|
	\|		\|
	\|}		\|}

2016-05-19T16:40:49Z

Communicate with the sst26vf032b

← Older revision		Revision as of 16:40, 19 May 2016
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	== Communicate with the ~~sst26vf032b~~ ==		== Communicate with the SST26VF032B ==
			{\| class="wikitable"
			!Instruction
			!
			!Command cycle
			!Bitlen
			!Source
			!Example
			\|-
			\|JEDEC-ID
			\|
			\|9FH
			\|32
			\|
			\|U-Boot > sspi 0x7100 32 9f000000
			00BF2642
			\|-
			\|RDSR
			\|
			\|05H
			\|16
			\|p. 10
			\|U-Boot > sspi 0x7100 16 3500
			0008
			\|-
			\|RDCR
			\|
			\|35H
			\|16
			\|
			\|
			\|-
			\|WREN
			\|
			\|06H
			\|8
			\|p. 33
			\|U-Boot > sspi 0x7100 8 06
			00
			\|-
			\|WBPR
			\|
			\|42H
			\|152
			\|
			\|
			\|-
			\|RBPR
			\|
			\|72H
			\|152
			\|
			\|
			\|-
			\|ULBPR
			\|
			\|98H
			\|8
			\|
			\|
			\|-
			\|Read (40MHz)
			\|
			\|03H
			\|
			\|p. 15
			\|Read at offset 0 32 bits
			U-Boot > sspi 0x7100 64 0300000000000000
			00000000FFFFFFFF
			\|-
			\|SE
			\|Sector-Erase (change to 1) a 4KiB sector
			\|20H
			\|32
			\|
			\|
			\|}

2016-05-19T16:15:46Z

Created page with "U-Boot is a bootloader. == Communicate with the sst26vf032b =="

New page

U-Boot is a bootloader.

== Communicate with the sst26vf032b ==