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-rw-r--r--ports/esp32/main.c30
1 files changed, 29 insertions, 1 deletions
diff --git a/ports/esp32/main.c b/ports/esp32/main.c
index b8f49a33ba..f048aa85f5 100644
--- a/ports/esp32/main.c
+++ b/ports/esp32/main.c
@@ -38,6 +38,7 @@
#include "nvs_flash.h"
#include "esp_task.h"
#include "esp_event.h"
+#include "esp_flash.h"
#include "esp_log.h"
#include "esp_memory_utils.h"
#include "esp_psram.h"
@@ -214,11 +215,38 @@ void boardctrl_startup(void) {
nvs_flash_erase();
nvs_flash_init();
}
+
+ // Query the physical size of the SPI flash and store it in the size
+ // variable of the global, default SPI flash handle.
+ esp_flash_get_physical_size(NULL, &esp_flash_default_chip->size);
+
+ // If there is no filesystem partition (no "vfs" or "ffat"), add a "vfs" partition
+ // that extends from the end of the application partition up to the end of flash.
+ if (esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_ANY, "vfs") == NULL
+ && esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_ANY, "ffat") == NULL) {
+ // No "vfs" or "ffat" partition, so try to create one.
+
+ // Find the end of the last partition that exists in the partition table.
+ size_t offset = 0;
+ esp_partition_iterator_t iter = esp_partition_find(ESP_PARTITION_TYPE_ANY, ESP_PARTITION_SUBTYPE_ANY, NULL);
+ while (iter != NULL) {
+ const esp_partition_t *part = esp_partition_get(iter);
+ offset = MAX(offset, part->address + part->size);
+ iter = esp_partition_next(iter);
+ }
+
+ // If we found the application partition and there is some space between the end of
+ // that and the end of flash, create a "vfs" partition taking up all of that space.
+ if (offset > 0 && esp_flash_default_chip->size > offset) {
+ size_t size = esp_flash_default_chip->size - offset;
+ esp_partition_register_external(esp_flash_default_chip, offset, size, "vfs", ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_FAT, NULL);
+ }
+ }
}
void MICROPY_ESP_IDF_ENTRY(void) {
// Hook for a board to run code at start up.
- // This defaults to initialising NVS.
+ // This defaults to initialising NVS and detecting the flash size.
MICROPY_BOARD_STARTUP();
// Create and transfer control to the MicroPython task.