esp_partition_read causes exception
Posted: Tue Feb 07, 2017 9:37 pm
I'm writing flash memory access code and having a problem with esp_partition_read API.
When I run the following code, I get an exception at esp_partition_read but not all the time. Sometime it works and sometimes it won't. Can someone advise me the reason and fix please?
Code:
Run the above code, and get the following error from time to time.
I modified partition like this:
When I run the following code, I get an exception at esp_partition_read but not all the time. Sometime it works and sometimes it won't. Can someone advise me the reason and fix please?
Code:
Code: Select all
#include <Arduino.h>
#include "esp_spi_flash.h"
#include "esp_partition.H"
static esp_partition_t *epp;
void setup()
{
int i, s;
char buf[4096];
Serial.begin(115200);
Serial.println("FLASH FILE SYSTEM TEST");
epp = (esp_partition_t *)esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_SPIFFS, NULL);
if (!epp) {
Serial.println("Can't find spiffs partition");
while (1);
}
Serial.printf("DATA Subtype=%d add=%x size=%x lbl=%s enc=%d\n", epp->subtype, epp->address, epp->size, epp->label, epp->encrypted);
Serial.println("Write one sector");
for (i = 0; i < sizeof(buf); i++) {
buf[i] = 0x55;
}
if (esp_partition_write(epp, 0, buf, sizeof(buf))) {
Serial.println("Write Error");
}
else {
Serial.println("Write OK");
}
Serial.println("Reading from flash...");
for (i = 0; i < 2; i++) {
if (esp_partition_read(epp, i * 4096 , buf, sizeof(buf))) {
Serial.println("flash read error");
}
else {
for (s = 0; s < 10; s++) {
Serial.printf("%x ", buf[s]);
}
Serial.println();
}
}
}
void loop()
{
Serial.println("hello");
delay(9000);
}Run the above code, and get the following error from time to time.
Code: Select all
FLASH FILE SYSTEM TEST
DATA Subtype=130 add=110000 size=200000 lbl=spiffs enc=0
Write one sector
Write OK
Reading from flash...
Guru Meditation Error of type IllegalInstruction occurred on core 1. Exception was unhandled.
Register dump:
PC : 0x400d96bb PS : 0x00060c30 A0 : 0x3ffc29b8 A1 : 0x3ffdb790
A2 : 0x00000000 A3 : 0x400821f8 A4 : 0x00000000 A5 : 0x0000ff00
A6 : 0x00ff0000 A7 : 0xff000000 A8 : 0x800d96b9 A9 : 0x3ffdb770
A10 : 0x00000000 A11 : 0x00000000 A12 : 0x3ffc2868 A13 : 0x3ffc2870
A14 : 0x00000000 A15 : 0x00000001 SAR : 0x00000020 EXCCAUSE: 0x00000000
EXCVADDR: 0x00000000 LBEG : 0x400014fd LEND : 0x4000150d LCOUNT : 0xffffffff
Backtrace: 0x400d96bb:0x3ffdb790 0x3ffc29b8:0x3ffdb7b0 0x40081f84:0x3ffdb7d0 0x400f7459:0x3ffdb820 0x400d0ce3:0x3ffdb850 0x400ff746:0x3ffdc880
CPU halted.
ets Jun 8 2016 00:22:57Code: Select all
APP Subtype=0 add=0x10000 size=0x100000 lbl=factory enc=0
DAT Subtype=130 add=0x110000 size=0x200000 lbl=spiffs enc=0
DAT Subtype=1 add=0xf000 size=0x1000 lbl=phy_init enc=0
DAT Subtype=2 add=0x9000 size=0x6000 lbl=nvs enc=0