Flashed my ESP-201 with AT 0.50 and boot 1.4, "Error magic!"
Posted: Fri Nov 27, 2015 3:35 pmFeels like this doesn't really belong in general but none of the other forums looked like an obvious place to talk about official AT firmware issues.
Bought a pair of ESP-201 boards from an aliexpress vendor recently. These came with 8mbit flash parts, so the current AT firmware should fit without modification.
This is my first espressif tinkering. I've messed around with arduinos a bit. I'm no programmer, but I have more than 15 years experience in software quality assurance, and 2 years of that was in embedded linux, so the concepts are familiar to me.
Anyway, as delivered these came with AT v0.25 and I think boot 1.2.
Got one into a breadboard, got it hooked up to a cp2102 usb dongle, got talking to it at 115200, got it to connect to my local wifi.
So then i downloaded the 0.50 AT and the nodemcu flasher. Pulled gpio0 to ground and flashed the following (at 115200bps) per the readme:
boot_v1.4(b1).bin at 0x00000
user1.1024.new.2.bin at 0x01000
blank.bin at 0x7e000 and 0x1fe000
esp_init_data_default.bin 0x1fc0000
Following that, the serial is now at 74880bps, and when it boots up i get this:
I re-flashed a few times, to no effect.
Any clues what i have done wrong?
Bought a pair of ESP-201 boards from an aliexpress vendor recently. These came with 8mbit flash parts, so the current AT firmware should fit without modification.
This is my first espressif tinkering. I've messed around with arduinos a bit. I'm no programmer, but I have more than 15 years experience in software quality assurance, and 2 years of that was in embedded linux, so the concepts are familiar to me.
Anyway, as delivered these came with AT v0.25 and I think boot 1.2.
Got one into a breadboard, got it hooked up to a cp2102 usb dongle, got talking to it at 115200, got it to connect to my local wifi.
So then i downloaded the 0.50 AT and the nodemcu flasher. Pulled gpio0 to ground and flashed the following (at 115200bps) per the readme:
boot_v1.4(b1).bin at 0x00000
user1.1024.new.2.bin at 0x01000
blank.bin at 0x7e000 and 0x1fe000
esp_init_data_default.bin 0x1fc0000
Following that, the serial is now at 74880bps, and when it boots up i get this:
Code: Select all
ets Jan 8 2013,rst cause:1, boot mode:(3,6)
load 0x40100000, len 1396, room 16
tail 4
chksum 0x89
load 0x3ffe8000, len 776, room 4
tail 4
chksum 0xe8
load 0x3ffe8308, len 540, room 4
tail 8
chksum 0xc0
csum 0xc0
2nd boot version : 1.4(b1)
SPI Speed : 40MHz
SPI Mode : QIO
SPI Flash Size & Map: 8Mbit(512KB+512KB)
jump to run user1 @ 1000
error magic!
backup boot failed.
user code doneI re-flashed a few times, to no effect.
Any clues what i have done wrong?