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Does ESP32 have code to read-out manufacturer of Flash?
Posted: Fri Jul 09, 2021 10:36 am
by ullixesp
I am having trouble with reading flash memory, which seems to be rather specific to a certain Flash manufacturer
viewtopic.php?f=19&t=21733
I know to readout flash manufacturer with esptool.py:
The result is e.g.:
Code: Select all
Manufacturer: 20
Device: 4016
Detected flash size: 4MB
Are there functions in ESP code - preferably accessible in the Arduino-Framwork - which return the same info? My search came up empty.
Re: Does ESP32 have code to read-out manufacturer of Flash?
Posted: Fri Jul 09, 2021 1:49 pm
by lbernstone
Code: Select all
#include <esp_flash.h>
uint32_t chipid;
esp_flash_read_id(NULL, &chipid);
Serial.printf("chipid: %6x", chipid);
Re: Does ESP32 have code to read-out manufacturer of Flash?
Posted: Fri Jul 09, 2021 5:06 pm
by ullixesp
Thanks, but looking into both the PlatformIO and Arduino folders, the code fails here:
- include fails because the file `esp_flash.h` doesn't exist,
- searching over all files for function `esp_flash_read_id()` comes back empty
What to do?
Re: Does ESP32 have code to read-out manufacturer of Flash?
Posted: Sat Jul 10, 2021 12:38 am
by lbernstone
Code: Select all
#include <rom/spi_flash.h>
Serial.begin(115200);
uint32_t chipid = g_rom_flashchip.device_id;
Serial.printf("chipid: %6x\n", chipid);
Re: Does ESP32 have code to read-out manufacturer of Flash?
Posted: Sat Jul 10, 2021 7:39 am
by ullixesp
Yes, this does work. Many thanks!