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by eriksl
Wed Jul 22, 2015 2:22 pm
Forum: ESP8266 SDK
Topic: 236 kbyte limit on 4M flash?
Replies: 5
Views: 3033

Re: 236 kbyte limit on 4M flash?

blubb wrote:Do you mean 4MBit or 4MByte...?

4 Mbit of course. Flash memories are identified by their capacity in bits.
by eriksl
Tue Jul 21, 2015 6:02 pm
Forum: ESP8266 SDK
Topic: 236 kbyte limit on 4M flash?
Replies: 5
Views: 3033

Re: 236 kbyte limit on 4M flash?

1. What are your bin files, eagle.flash.bin + eagle.irom0text.bin , or user1.bin ? Did you choose 4096KB in STEP5 while compiling ? The firmware files are "eagle.flash.bin + eagle.irom0text.bin" style. The firmwares are made for 4M (256+256) layout, if you mean that. 2. Do you add ICACHE_...
by eriksl
Tue Jul 21, 2015 5:51 pm
Forum: ESP8266 SDK
Topic: Use all of the 512 kbyte of the 4M flash
Replies: 4
Views: 3970

Use all of the 512 kbyte of the 4M flash

Hello, Is it possible to use all of the 512 kbyte of the 4M flash? I am not going to do any OTA-updating, so I think it's a pity I can't use this part of the flash. When I flash firmwares beyond the 192 kbyte boundary, the code won't run. Would it be possible to define an extra segment + section(s) ...
by eriksl
Tue Jul 21, 2015 5:36 pm
Forum: ESP8266 SDK
Topic: 236 kbyte limit on 4M flash?
Replies: 5
Views: 3033

236 kbyte limit on 4M flash?

Hello, I am running into the problem that apparently my firmware is getting too large. There are no linker warnings, but the esp8266 simply won't start. No UART output as well, nothing. If I reduce the total firmware size (iram+irom) to exactly 236 kbyte, it works normally. Add a few bytes above the...
by eriksl
Thu Jul 09, 2015 10:17 pm
Forum: Showcase
Topic: ESP8266 "universal" remote I/O bridge
Replies: 0
Views: 2762

ESP8266 "universal" remote I/O bridge

This includes an interrupt-driven UART (serial) bridge.

http://github.com/eriksl/esp8266-universal-io-bridge
by eriksl
Wed Jun 10, 2015 9:19 pm
Forum: ESP8266 HDK
Topic: UART
Replies: 2
Views: 3753

Re: UART

It helps a bit, but the wording isn't very informative. I googled about generic UART traits and already learned a lot, apparently the "uart receive fifo timeout" feature is common on buffered UART's. The thing I didn't realise earlier on, is that you need to enable and use both interrupts:...
by eriksl
Tue Jun 09, 2015 1:47 am
Forum: ESP8266 HDK
Topic: UART
Replies: 2
Views: 3753

UART

Can someone please help me with the exact operation of the UART? I am currently making something that needs the UART to be working interrupt/event driven. I am using the timeout ("RX_TOUT") interrupt to signal that the fifo can be read and fifo empty ("TXFIFO_EMPTY"). I set a thr...

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