Search found 49 matches

by iosixllc
Mon Sep 25, 2017 12:38 pm
Forum: ESP32 SDK
Topic: EFUSE read/write VDD_SDIO from user application
Replies: 26
Views: 938

Re: EFUSE read/write VDD_SDIO from user application

Thanks Angus, Yes, you understand the problem correctly. We are seeing the behavior on ~30 chips, many of which were not ever run at 3.3V. 20MHz seems to have no effect. We have the standard 0.1uFs all around plus 1uF and 10uF near the antenna pad power inputs. Also, bulk 47uF capacitance maybe 10-2...
by iosixllc
Sat Sep 23, 2017 2:54 pm
Forum: ESP32 SDK
Topic: EFUSE read/write VDD_SDIO from user application
Replies: 26
Views: 938

Re: EFUSE read/write VDD_SDIO from user application

Ok then I do have the latest bootloader. It seems if I could slow the write speed that would be ideal. I’m at 3.3V with VSDIO at 1.8V.
by iosixllc
Sat Sep 23, 2017 5:25 am
Forum: ESP32 SDK
Topic: EFUSE read/write VDD_SDIO from user application
Replies: 26
Views: 938

Re: EFUSE read/write VDD_SDIO from user application

I do have that enabled in sdkconfig. I have only tried DIO. I was not aware there is an updated boot loader - would that have come with the new esp-idf? I haven’t tried the OTA example, but I will say this code works 100% at 3.3V.
by iosixllc
Fri Sep 22, 2017 10:00 pm
Forum: ESP32 SDK
Topic: EFUSE read/write VDD_SDIO from user application
Replies: 26
Views: 938

Re: EFUSE read/write VDD_SDIO from user application

I was using 2.1 beta, I just updated to HEAD along with the latest compiler update, and am getting the same result: I (47010) upgrade: OTA Partition: 3FFD8E30 I (47010) upgrade: Set start address for flash writes to 0x00100000 I (50380) upgrade: Result from esp_ota_begin: 0 1 So far we have 968 byte...
by iosixllc
Fri Sep 22, 2017 9:34 pm
Forum: General Discussion
Topic: make flash errors
Replies: 12
Views: 1552

Re: make flash errors

Fixed it - needed to add to PATH:

https://github.com/espressif/esp-idf/issues/493
by iosixllc
Fri Sep 22, 2017 9:19 pm
Forum: General Discussion
Topic: make flash errors
Replies: 12
Views: 1552

Re: make flash errors

I just downloaded the new SDK - esp32_win32_msys2_environment_and_toolchain-20170918.zip

This doesn't seem to include python, so I downloaded 2.7, but it doesn't recognize windows COM ports. Is there a special python release I need? Thanks!
by iosixllc
Fri Sep 22, 2017 6:58 am
Forum: ESP32 SDK
Topic: EFUSE read/write VDD_SDIO from user application
Replies: 26
Views: 938

Re: EFUSE read/write VDD_SDIO from user application

If I skip the write verify and let it complete, I get this: I (150478) upgrade: OTA Partition: 3FFB71BC I (150480) upgrade: Set start address for flash writes to 0x00100000 I (153751) upgrade: Result from esp_ota_begin: 0 1 I (165284) esp_image: segment 0: paddr=0x00100020 vaddr=0x3f400020 size=0x13...
by iosixllc
Fri Sep 22, 2017 6:38 am
Forum: ESP32 SDK
Topic: EFUSE read/write VDD_SDIO from user application
Replies: 26
Views: 938

Re: EFUSE read/write VDD_SDIO from user application

Correct, UART flash works just fine at 1.8V and 40MHz. OTA flash at 1.8V is erroring out consistently. I'm using fresh devices just in case there is an issue with the old ones. Fresh devices without 1.8V set (@3.3V) work fine via OTA.
by iosixllc
Fri Sep 22, 2017 5:12 am
Forum: ESP32 SDK
Topic: EFUSE read/write VDD_SDIO from user application
Replies: 26
Views: 938

Re: EFUSE read/write VDD_SDIO from user application

Thanks. When I set the voltage to 1.8V, everything runs just fine with 40MHz flash speed, but when I try to use my OTA WiFi-based reflash mechanism, there are a lot of write errors: I (102562) upgrade: OTA Partition: 3FFB71BC I (102564) upgrade: Set start address for flash writes to 0x00100000 I (10...
by iosixllc
Thu Sep 14, 2017 3:00 pm
Forum: ESP32 SDK
Topic: EFUSE read/write VDD_SDIO from user application
Replies: 26
Views: 938

Re: EFUSE read/write VDD_SDIO from user application

Thanks WiFive - that worked. I was at 80MHz DIO, which apparently worked at 3.3V and apparently passed the data hash checks (??) but at 40MHz it flashes and runs just fine: make flash Flashing binaries to serial port /COM4 (app at offset 0x10000)... esptool.py v2.1-beta1 Connecting.... Chip is ESP32...