add wear_levelling component and example

components/wear_levelling/SPI_Flash.cpp

@@ -0,0 +1,81 @@
+// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "esp_log.h"
+#include "SPI_Flash.h"
+#include "esp_spi_flash.h"
+static const char *TAG = "spi_flash";
+
+SPI_Flash::SPI_Flash()
+{
+}
+
+size_t SPI_Flash::chip_size()
+{
+    return spi_flash_get_chip_size();
+}
+
+esp_err_t SPI_Flash::erase_sector(size_t sector)
+{
+    esp_err_t result = spi_flash_erase_sector(sector);
+    if (result == ESP_OK) {
+        ESP_LOGV(TAG, "erase_sector - sector=0x%08x, result=0x%08x", sector, result);
+    } else {
+        ESP_LOGE(TAG, "erase_sector - sector=0x%08x, result=0x%08x", sector, result);
+    }
+    return result;
+}
+esp_err_t SPI_Flash::erase_range(size_t start_address, size_t size)
+{
+    size = (size + SPI_FLASH_SEC_SIZE - 1) / SPI_FLASH_SEC_SIZE;
+    size = size * SPI_FLASH_SEC_SIZE;
+    esp_err_t result = spi_flash_erase_range(start_address, size);
+    if (result == ESP_OK) {
+        ESP_LOGV(TAG, "erase_range - start_address=0x%08x, size=0x%08x, result=0x%08x", start_address, size, result);
+    } else {
+        ESP_LOGE(TAG, "erase_range - start_address=0x%08x, size=0x%08x, result=0x%08x", start_address, size, result);
+    }
+    return result;
+}
+
+esp_err_t SPI_Flash::write(size_t dest_addr, const void *src, size_t size)
+{
+    esp_err_t result = spi_flash_write(dest_addr, src, size);
+    if (result == ESP_OK) {
+        ESP_LOGV(TAG, "write - dest_addr=0x%08x, size=0x%08x, result=0x%08x", dest_addr, size, result);
+    } else {
+        ESP_LOGE(TAG, "write - dest_addr=0x%08x, size=0x%08x, result=0x%08x", dest_addr, size, result);
+    }
+    return result;
+}
+
+esp_err_t SPI_Flash::read(size_t src_addr, void *dest, size_t size)
+{
+    esp_err_t result = spi_flash_read(src_addr, dest, size);
+    if (result == ESP_OK) {
+        ESP_LOGV(TAG, "read - src_addr=0x%08x, size=0x%08x, result=0x%08x", src_addr, size, result);
+    } else {
+        ESP_LOGE(TAG, "read - src_addr=0x%08x, size=0x%08x, result=0x%08x", src_addr, size, result);
+    }
+    return result;
+}
+
+size_t SPI_Flash::sector_size()
+{
+    return SPI_FLASH_SEC_SIZE;
+}
+
+SPI_Flash::~SPI_Flash()
+{
+}