update nvm implementation

ports/esp32s2/common-hal/nvm/ByteArray.c

@@ -26,6 +26,8 @@
 
 #include "common-hal/nvm/ByteArray.h"
 
+#include <string.h>
+
 #include "py/runtime.h"
 #include "nvs_flash.h"
 
@@ -53,26 +55,52 @@ static void get_nvs_handle(nvs_handle_t * nvs_handle) {
 bool common_hal_nvm_bytearray_set_bytes(nvm_bytearray_obj_t *self,
         uint32_t start_index, uint8_t* values, uint32_t len) {
     char index[9];
-    sprintf(index, "%i", start_index);
+
+    uint8_t buffer[len];
+    memcpy(buffer, values, len);
+
     // start nvs
     nvs_handle_t handle;
     get_nvs_handle(&handle);
-    bool status = ((nvs_set_u8(handle, (const char *)index, *values) == ESP_OK) && (nvs_commit(handle) == ESP_OK));
+
+    // stage flash changes
+    for (uint32_t i = 0; i < len; i++) {
+        sprintf(index, "%i", start_index + i);
+        if (nvs_set_u8(handle, (const char *)index, buffer[i]) != ESP_OK) {
+            return false;
+        }
+    }
+
+    // commit flash changes
+    if (nvs_commit(handle) != ESP_OK) {
+        return false;
+    }
+
     // close nvs
     nvs_close(handle);
-    return status;
+    return true;
 }
 
 void common_hal_nvm_bytearray_get_bytes(nvm_bytearray_obj_t *self,
         uint32_t start_index, uint32_t len, uint8_t* values) {
     char index[9];
-    sprintf(index, "%i", start_index);
+    uint8_t buffer[len];
+
     // start nvs
     nvs_handle_t handle;
     get_nvs_handle(&handle);
-    if (nvs_get_u8(handle, (const char *)index, values) != ESP_OK) {
-        mp_raise_RuntimeError(translate("NVS Error"));
+
+    // get from flash
+    for (uint32_t i = 0; i < len; i++) {
+        sprintf(index, "%i", start_index + i);
+        if (nvs_get_u8(handle, (const char *)index, &buffer[i]) != ESP_OK) {
+            mp_raise_RuntimeError(translate("NVS Error"));
+        }
     }
+
+    // set into values
+    memcpy(values, buffer, len);
+
     // close nvs
     nvs_close(handle);
 }