On.Hardware

When writing our software, we need to think about hardware which will run our software.

Journaled Flash Storage – Emulating EEPROM over Flash, ACID Transactions, and More. Part III – JoFS Itself

October 12, 2015 by “No Bugs” Bunny

BB_part58_v1.png

Abstract:

JoFS provides faithful EEPROM emulation and ACID-compliant Flash-based storage

Quote:

The first working version of JoFS is expected approximately by the end of 2015

Filed under: On.HardwareMCUOn.ProgrammingEmbedded

Tagged With: IoTEEPROMFlashMCU
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Journaled Flash Storage – Emulating EEPROM over Flash, ACID Transactions, and More. Part II – Existing Implementations by Atmel, SiLabs, TI, STM, and Microchip

October 5, 2015 by “No Bugs” Bunny

Losing Data on Way to Flash

Quote:

Whenever a developer is using something named 'X Emulation over Y', she may expect that a faithful emulation exhibits the same properties as original (non-emulated) X.

Another Quote:

Unfortunately, as discussed in detail above, none of five implementations is a really faithful EEPROM emulation.

Filed under: On.HardwareMCUOn.ProgrammingEmbedded

Tagged With: IoTMCUFlashEEPROM
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Journaled Flash Storage – Emulating EEPROM over Flash, ACID Transactions, and More. Part I – Flash vs EEPROM

September 28, 2015 by “No Bugs” Bunny

EEPROM vs Flash

Quote:

You cannot erase single byte of Flash, but need to erase the whole page

Another Quote:

First of all, we want to be sure that whatever-is-already-written to our persistent storage, stays there; this property is known as Durability.

Filed under: On.HardwareMCUOn.ProgrammingEmbedded

Tagged With: MCUIoTFlashEEPROM
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Modified Harvard Architecture: Clarifying Confusion

September 21, 2015 by “No Bugs” Bunny

von Neumann dines with Harvard

Abstract:

Definition of "Modified Harvard" architecture is confusing and overbroad. Proposed alternatives are "Almost-Harvard" and "Almost-von-Neumann

Quote:

"One thing nobody realised for a while is that the system with the least possible amount of chargebacks is the system which rejects all transactions outright

Filed under: On.HardwareMCUOn.ProgrammingEmbedded

Tagged With: x86/x64MCUIoTCache
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