Initial Support for RP2040 platform (#3284)

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

esphome/components/ota/ota_backend_arduino_rp2040.cpp

@@ -0,0 +1,55 @@
+#include "esphome/core/defines.h"
+#ifdef USE_ARDUINO
+#ifdef USE_RP2040
+
+#include "esphome/components/rp2040/preferences.h"
+#include "ota_backend.h"
+#include "ota_backend_arduino_rp2040.h"
+#include "ota_component.h"
+
+#include <Updater.h>
+
+namespace esphome {
+namespace ota {
+
+OTAResponseTypes ArduinoRP2040OTABackend::begin(size_t image_size) {
+  bool ret = Update.begin(image_size, U_FLASH);
+  if (ret) {
+    return OTA_RESPONSE_OK;
+  }
+
+  uint8_t error = Update.getError();
+  if (error == UPDATE_ERROR_BOOTSTRAP)
+    return OTA_RESPONSE_ERROR_INVALID_BOOTSTRAPPING;
+  if (error == UPDATE_ERROR_NEW_FLASH_CONFIG)
+    return OTA_RESPONSE_ERROR_WRONG_NEW_FLASH_CONFIG;
+  if (error == UPDATE_ERROR_FLASH_CONFIG)
+    return OTA_RESPONSE_ERROR_WRONG_CURRENT_FLASH_CONFIG;
+  if (error == UPDATE_ERROR_SPACE)
+    return OTA_RESPONSE_ERROR_RP2040_NOT_ENOUGH_SPACE;
+  return OTA_RESPONSE_ERROR_UNKNOWN;
+}
+
+void ArduinoRP2040OTABackend::set_update_md5(const char *md5) { Update.setMD5(md5); }
+
+OTAResponseTypes ArduinoRP2040OTABackend::write(uint8_t *data, size_t len) {
+  size_t written = Update.write(data, len);
+  if (written != len) {
+    return OTA_RESPONSE_ERROR_WRITING_FLASH;
+  }
+  return OTA_RESPONSE_OK;
+}
+
+OTAResponseTypes ArduinoRP2040OTABackend::end() {
+  if (!Update.end())
+    return OTA_RESPONSE_ERROR_UPDATE_END;
+  return OTA_RESPONSE_OK;
+}
+
+void ArduinoRP2040OTABackend::abort() { Update.end(); }
+
+}  // namespace ota
+}  // namespace esphome
+
+#endif  // USE_RP2040
+#endif  // USE_ARDUINO