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raburton / rboot

An open source bootloader for the ESP8266
https://richard.burtons.org/tag/rboot/?order=ASC
MIT License
301 stars 72 forks source link

Slow boot #8

Closed slaff closed 8 years ago

slaff commented 8 years ago

When using rBoot the booting time is roughly 7 times higher.

I used the Basic_Blink example in Sming. Without rBoot, the boot time is ~ 300 ms With rBoot and with/or without RTC_ENABLED the boot time is ~2300 ms

Any ideas why is that happening ?

raburton commented 8 years ago

The rBoot code has a 2 second delay to allow you to connect a terminal before the messages are printed. This should be commented out by default, but I could have accidentally committed it uncommented? rBoot doesn't normally slow the boot by any significant amount and the fact it seems to have done so here by exactly 2 seconds makes me suspect that deliberate delay is in effect.

Richard. On 18 Mar 2016 10:33 a.m., "slaff" notifications@github.com wrote:

When using rBoot the booting time is roughly 7 times higher.

I used the Basic_Blink example in Sming. Without rBoot, the boot time is ~ 300 ms With rBoot and with/or without RTC_ENABLED the boot time is ~2300

Any ideas why is that happening ?

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slaff commented 8 years ago

Got it! In rboot.c:

https://github.com/SmingHub/Sming/blob/develop/Sming/rboot/rboot.c#L220

    // delay to slow boot (help see messages when debugging)
    ets_delay_us(2000000);

Will you change this or I should submit a PR?

raburton commented 8 years ago

fixed in 4cf6132f6ee624318c04b2a8d9e37da64b7c283c