From: Ivan Grokhotkov <ivan@espressif.com>
Date: Tue, 15 Nov 2016 10:23:29 +0000 (+0800)
Subject: nvs: initialize using layout from partition table
X-Git-Tag: v1.0~44^2~7
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=51021b06f8c7e49e937f8c295df95807bf505eb3;p=esp-idf

nvs: initialize using layout from partition table
---

diff --git a/components/nvs_flash/include/nvs_flash.h b/components/nvs_flash/include/nvs_flash.h
index d6e1990250..eca7f99edd 100644
--- a/components/nvs_flash/include/nvs_flash.h
+++ b/components/nvs_flash/include/nvs_flash.h
@@ -18,25 +18,21 @@
 extern "C" {
 #endif
 
-/** Initialise NVS flash storage with default flash sector layout
-
-    Temporarily, this region is hardcoded as a 12KB (0x3000 byte)
-    region starting at 36KB (0x9000 byte) offset in flash.
-
-    @return ESP_OK if flash was successfully initialised.
-*/
+/**
+ * @brief Initialize NVS flash storage with layout given in the partition table.
+ *
+ * @return ESP_OK if storage was successfully initialized.
+ */
 esp_err_t nvs_flash_init(void);
 
-/** Initialise NVS flash storage with custom flash sector layout
-
-    @param baseSector Flash sector (units of 4096 bytes) offset to start NVS.
-    @param sectorCount Length (in flash sectors) of NVS region.
-
-    @return ESP_OK if flash was successfully initialised.
-
-    @note Use this parameter if you're not using the options in menuconfig for
-          configuring flash layout & partition table.
-*/
+/**
+ * @brief Initialize NVS flash storage with custom flash sector layout
+ * @note  Make sure specified sectors don't fall within ranges occupied
+ *        by other partitions.
+ * @param baseSector Flash sector (units of 4096 bytes) offset to start NVS
+ * @param sectorCount Length (in flash sectors) of NVS region
+ * @return ESP_OK if flash was successfully initialized
+ */
 esp_err_t nvs_flash_init_custom(uint32_t baseSector, uint32_t sectorCount);
 
 
diff --git a/components/nvs_flash/src/nvs_api.cpp b/components/nvs_flash/src/nvs_api.cpp
index f6c6c588aa..b2cb5e7ad4 100644
--- a/components/nvs_flash/src/nvs_api.cpp
+++ b/components/nvs_flash/src/nvs_api.cpp
@@ -16,6 +16,7 @@
 #include "nvs_storage.hpp"
 #include "intrusive_list.h"
 #include "nvs_platform.hpp"
+#include "esp_partition.h"
 #include "sdkconfig.h"
 
 #ifdef ESP_PLATFORM
@@ -61,10 +62,19 @@ extern "C" void nvs_dump()
     s_nvs_storage.debugDump();
 }
 
+#ifdef ESP_PLATFORM
 extern "C" esp_err_t nvs_flash_init(void)
 {
-    return nvs_flash_init_custom(9, 3);
+    const esp_partition_t* partition = esp_partition_find_first(
+            ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_NVS, NULL);
+    if (partition == NULL) {
+        return ESP_ERR_NOT_FOUND;
+    }
+
+    return nvs_flash_init_custom(partition->address / SPI_FLASH_SEC_SIZE,
+            partition->size / SPI_FLASH_SEC_SIZE);
 }
+#endif
 
 extern "C" esp_err_t nvs_flash_init_custom(uint32_t baseSector, uint32_t sectorCount)
 {