henrykotze commented on issue #17809:
URL: https://github.com/apache/nuttx/issues/17809#issuecomment-3763053966
Yes happy to share to get this over the line:
I decided to move to simple boot, as the OTA benefits we are not using.
Simple boot was not working with the following boot message:
```
rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3ffb5f00,len:6912
load:0x40080000,len:32432
entry 0x40103220
Fatal exception (0): IllegalInstruction
epc1=0x40103222, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000,
depc=0x00000000
ets Jul 29 2019 12:21:46
```
I then added the IRAM_ATTR to the __esp32_start() and __start() function,
and then it booted succesfully.
Im sharing the above as im wondering if the esp_flash operation might sit in
the wrong memory locations?
Here is my boot sequence now:
```
ets Jul 29 2019 12:21:46
rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3ffb5f00,len:6912
load:0x40080000,len:33404
entry 0x40080fbc
*** Booting NuttX ***
I (143) boot: chip revision: v3.1
I (143) boot.esp32: SPI Speed : 40MHz
I (143) boot.esp32: SPI Mode : DIO
I (146) boot.esp32: SPI Flash Size : 8MB
I (150) boot: Enabling RNG early entropy source...
dram: lma 0x00001020 vma 0x3ffb5f00 len 0x1b00 (6912)
iram: lma 0x00002b28 vma 0x40080000 len 0x827c (33404)
padd: lma 0x0000adb8 vma 0x00000000 len 0x5240 (21056)
imap: lma 0x00010000 vma 0x40100000 len 0x771b0 (487856)
padd: lma 0x000871b8 vma 0x00000000 len 0x8e40 (36416)
dmap: lma 0x00090000 vma 0x3f410000 len 0x26fd4 (159700)
total segments stored 6
ABDESP32 chip revision is v3.1
Starting
found procfs
found binfs
Entry
ESP SPI Flash information:
ID = 0x204017
Status mask = 0xffff
Chip size = 8192 KB
Page size = 256 B
Sector size = 4 KB
Block size = 64 KB
MTD offset = 0x180000
MTD size = 0x10000
esp_ioctl: 1537
blocksize: 64 erasesize: 4096 neraseblocks: 2048
return 0
```
and here is my code to set up the parition:
```
int esp32_spiflash_init(void)
{
int ret = OK;
ret = esp_spiflash_init();
if (ret < 0) {
return ret;
}
ret = init_param_partition();
if (ret < 0) {
return ret;
}
```
```
#define CONFIG_ESP32_PARAM_MTD_OFFSET 0x180000
#define CONFIG_ESP32_PARAM_MTD_SIZE 0x10000
static int init_param_partition(void)
{
int ret = OK;
struct mtd_dev_s *mtd;
mtd = esp_spiflash_alloc_mtdpart(CONFIG_ESP32_PARAM_MTD_OFFSET,
CONFIG_ESP32_PARAM_MTD_SIZE);
if (!mtd) {
ferr("ERROR: Failed to alloc PARAM MTD partition of SPI
Flash\n");
return -ENOMEM;
}
ret = register_mtddriver("/fs/mtd_params", mtd, 0755, NULL);
if (ret < 0) {
ferr("ERROR: Failed to register PARAM MTD: %d\n", ret);
return ret;
}
return ret;
}
```
So im using a RAW mtd pointer with not filesystem. And this is also how i
used it in PX4 on nuttx 10.3.
The example spiflash also worked.
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