componeent structure, preparation for component branch

2026-05-08 20:10:37 +02:00 · 2020-09-29 19:58:01 +02:00
parent b473e88be1
commit 43ecb0a42e
45 changed files with 998 additions and 9747 deletions
@@ -0,0 +1,6 @@
+idf_component_register(
+    SRCS 
+        "display.c"
+        "display-gfx.c"
+    INCLUDE_DIRS "."
+)
@@ -0,0 +1,307 @@
+// Copyright 2020 Lukas Haubaum
+//
+// Licensed under the GNU Affero General Public License, Version 3;
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     https://www.gnu.org/licenses/agpl-3.0.html
+//
+// 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 "display-gfx.h"
+
+uint8_t display_gfx_clear[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+uint8_t display_gfx_font[224][8] = {
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x5f, 0x5f, 0x00, 0x00, 0x00},
+    {0x00, 0x08, 0x0e, 0x06, 0x08, 0x0e, 0x06, 0x00},
+    {0x00, 0x24, 0x7e, 0x7e, 0x24, 0x7e, 0x7e, 0x24},
+    {0x00, 0x4c, 0xde, 0x92, 0xfe, 0x92, 0xf6, 0x64},
+    {0x06, 0x8d, 0xe6, 0x78, 0x1e, 0x67, 0xd1, 0x60},
+    {0x00, 0x36, 0x7f, 0x49, 0x5f, 0x76, 0x70, 0x50},
+    {0x00, 0x00, 0x00, 0x08, 0x0e, 0x06, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x3e, 0x7f, 0x41, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x41, 0x7f, 0x3e, 0x00, 0x00},
+    {0x00, 0x14, 0x1c, 0x3e, 0x3e, 0x1c, 0x14, 0x00},
+    {0x00, 0x08, 0x08, 0x3e, 0x3e, 0x08, 0x08, 0x00},
+    {0x00, 0x00, 0x00, 0x80, 0xe0, 0x60, 0x00, 0x00},
+    {0x00, 0x00, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00},
+    {0x00, 0x00, 0x00, 0x60, 0x60, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0xc0, 0xf0, 0x3c, 0x0f, 0x03, 0x00},
+    {0x00, 0x3e, 0x7f, 0x4d, 0x59, 0x7f, 0x3e, 0x00},
+    {0x00, 0x42, 0x42, 0x7f, 0x7f, 0x40, 0x40, 0x00},
+    {0x00, 0x42, 0x63, 0x71, 0x59, 0x4f, 0x46, 0x00},
+    {0x00, 0x41, 0x49, 0x49, 0x49, 0x7f, 0x36, 0x00},
+    {0x00, 0x18, 0x1c, 0x16, 0x7f, 0x7f, 0x10, 0x00},
+    {0x00, 0x27, 0x67, 0x45, 0x45, 0x7d, 0x39, 0x00},
+    {0x00, 0x3e, 0x7f, 0x49, 0x49, 0x7b, 0x32, 0x00},
+    {0x00, 0x03, 0x63, 0x71, 0x19, 0x0f, 0x07, 0x00},
+    {0x00, 0x36, 0x7f, 0x49, 0x49, 0x7f, 0x36, 0x00},
+    {0x00, 0x06, 0x4f, 0x49, 0x69, 0x3f, 0x1e, 0x00},
+    {0x00, 0x00, 0x00, 0x24, 0x24, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x80, 0xe8, 0x68, 0x00, 0x00},
+    {0x00, 0x00, 0x08, 0x1c, 0x36, 0x22, 0x00, 0x00},
+    {0x00, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14},
+    {0x00, 0x00, 0x00, 0x22, 0x36, 0x1c, 0x08, 0x00},
+    {0x00, 0x02, 0x13, 0x59, 0x49, 0x0f, 0x06, 0x00},
+    {0x3e, 0x7f, 0x55, 0x5d, 0x5d, 0x5f, 0x6e, 0x20},
+    {0x00, 0x7e, 0x7f, 0x11, 0x11, 0x7f, 0x7e, 0x00},
+    {0x00, 0x7f, 0x7f, 0x49, 0x49, 0x7f, 0x36, 0x00},
+    {0x00, 0x3e, 0x7f, 0x41, 0x41, 0x63, 0x22, 0x00},
+    {0x01, 0x7f, 0x7f, 0x41, 0x41, 0x7f, 0x3e, 0x00},
+    {0x00, 0x7f, 0x7f, 0x49, 0x49, 0x49, 0x41, 0x00},
+    {0x00, 0x7f, 0x7f, 0x09, 0x09, 0x09, 0x01, 0x00},
+    {0x00, 0x3e, 0x7f, 0x41, 0x49, 0x79, 0x79, 0x00},
+    {0x00, 0x7f, 0x7f, 0x08, 0x08, 0x7f, 0x7f, 0x00},
+    {0x00, 0x00, 0x41, 0x7f, 0x7f, 0x41, 0x00, 0x00},
+    {0x00, 0x41, 0x41, 0x7f, 0x3f, 0x01, 0x00, 0x00},
+    {0x00, 0x7f, 0x7f, 0x0c, 0x3e, 0x73, 0x41, 0x00},
+    {0x00, 0x00, 0x7f, 0x7f, 0x40, 0x40, 0x40, 0x00},
+    {0x00, 0x7f, 0x7f, 0x0c, 0x08, 0x0c, 0x7f, 0x7f},
+    {0x00, 0x7f, 0x7f, 0x06, 0x0c, 0x7f, 0x7f, 0x00},
+    {0x00, 0x3e, 0x7f, 0x41, 0x41, 0x7f, 0x3e, 0x00},
+    {0x00, 0x7f, 0x7f, 0x09, 0x09, 0x0f, 0x06, 0x00},
+    {0x00, 0x3e, 0x7f, 0x51, 0x61, 0x7f, 0x5e, 0x00},
+    {0x00, 0x7f, 0x7f, 0x09, 0x19, 0x7f, 0x66, 0x00},
+    {0x00, 0x26, 0x6f, 0x49, 0x49, 0x7b, 0x32, 0x00},
+    {0x00, 0x01, 0x01, 0x7f, 0x7f, 0x01, 0x01, 0x00},
+    {0x00, 0x3f, 0x7f, 0x40, 0x40, 0x7f, 0x3f, 0x00},
+    {0x00, 0x0f, 0x3f, 0x70, 0x70, 0x3f, 0x0f, 0x00},
+    {0x3f, 0x7f, 0x60, 0x3c, 0x3c, 0x60, 0x7f, 0x3f},
+    {0x00, 0x63, 0x77, 0x1c, 0x1c, 0x77, 0x63, 0x00},
+    {0x00, 0x07, 0x0f, 0x78, 0x78, 0x0f, 0x07, 0x00},
+    {0x00, 0x61, 0x71, 0x59, 0x4d, 0x47, 0x43, 0x00},
+    {0x00, 0x00, 0x00, 0x7f, 0x7f, 0x41, 0x00, 0x00},
+    {0x00, 0x00, 0x03, 0x0f, 0x3c, 0xf0, 0xc0, 0x00},
+    {0x00, 0x00, 0x00, 0x41, 0x7f, 0x7f, 0x00, 0x00},
+    {0x00, 0x00, 0x04, 0x06, 0x02, 0x06, 0x04, 0x00},
+    {0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80},
+    {0x00, 0x00, 0x00, 0x02, 0x0e, 0x0c, 0x00, 0x00},
+    {0x00, 0x30, 0x7a, 0x4a, 0x4a, 0x7e, 0x7c, 0x00},
+    {0x00, 0x7f, 0x7f, 0x44, 0x44, 0x7c, 0x38, 0x00},
+    {0x00, 0x3c, 0x7e, 0x42, 0x42, 0x46, 0x44, 0x00},
+    {0x00, 0x38, 0x7c, 0x44, 0x44, 0x7f, 0x7f, 0x00},
+    {0x00, 0x3c, 0x7e, 0x4a, 0x4a, 0x4e, 0x4c, 0x00},
+    {0x00, 0x08, 0x7e, 0x7f, 0x09, 0x09, 0x01, 0x00},
+    {0x00, 0x1c, 0xbe, 0xa2, 0xa2, 0xfe, 0x7e, 0x00},
+    {0x00, 0x7f, 0x7f, 0x0c, 0x04, 0x7c, 0x78, 0x00},
+    {0x00, 0x00, 0x44, 0x7d, 0x7d, 0x40, 0x00, 0x00},
+    {0x00, 0x00, 0x82, 0xfe, 0x7e, 0x02, 0x00, 0x00},
+    {0x00, 0x7e, 0x7e, 0x18, 0x3c, 0x66, 0x42, 0x00},
+    {0x00, 0x00, 0x3e, 0x7e, 0x40, 0x40, 0x00, 0x00},
+    {0x7c, 0x7e, 0x02, 0x7e, 0x7e, 0x02, 0x7e, 0x7c},
+    {0x00, 0x7c, 0x7c, 0x06, 0x02, 0x7e, 0x7c, 0x00},
+    {0x00, 0x3c, 0x7e, 0x42, 0x42, 0x7e, 0x3c, 0x00},
+    {0x00, 0xfe, 0xfe, 0x22, 0x22, 0x3e, 0x1c, 0x00},
+    {0x00, 0x1c, 0x3e, 0x22, 0x22, 0xfe, 0xfe, 0x00},
+    {0x00, 0x00, 0x7c, 0x7e, 0x06, 0x02, 0x02, 0x00},
+    {0x00, 0x24, 0x6e, 0x4a, 0x4a, 0x7a, 0x30, 0x00},
+    {0x00, 0x00, 0x3f, 0x7f, 0x44, 0x44, 0x44, 0x00},
+    {0x00, 0x3e, 0x7e, 0x40, 0x60, 0x7e, 0x7e, 0x00},
+    {0x00, 0x0e, 0x3e, 0x70, 0x70, 0x3e, 0x0e, 0x00},
+    {0x3c, 0x7c, 0x40, 0x7c, 0x7c, 0x40, 0x7e, 0x3e},
+    {0x00, 0x42, 0x66, 0x3c, 0x3c, 0x66, 0x42, 0x00},
+    {0x00, 0x00, 0x4e, 0x5e, 0x70, 0x3e, 0x0e, 0x00},
+    {0x00, 0x00, 0x62, 0x72, 0x5a, 0x4e, 0x46, 0x00},
+    {0x00, 0x00, 0x18, 0x7e, 0xc3, 0x81, 0x42, 0x00},
+    {0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x42, 0x81, 0xc3, 0x7e, 0x18, 0x00},
+    {0x00, 0x10, 0x18, 0x08, 0x18, 0x10, 0x18, 0x08},
+    {0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55},
+    {0x28, 0x7c, 0xfe, 0xaa, 0xaa, 0x8a, 0xc6, 0x44},
+    {0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55},
+    {0x00, 0x00, 0x00, 0x80, 0xe0, 0x60, 0x00, 0x00},
+    {0x00, 0x00, 0x48, 0x7c, 0x3e, 0x0a, 0x00, 0x00},
+    {0x00, 0x80, 0xe0, 0x60, 0x80, 0xe0, 0x60, 0x00},
+    {0x40, 0x40, 0x00, 0x40, 0x40, 0x00, 0x40, 0x40},
+    {0x00, 0x08, 0x04, 0x7e, 0x7e, 0x04, 0x08, 0x00},
+    {0x00, 0x24, 0x42, 0xff, 0xff, 0x42, 0x24, 0x00},
+    {0x00, 0x04, 0x06, 0x03, 0x03, 0x06, 0x04, 0x00},
+    {0xc0, 0x66, 0x1d, 0x66, 0xd8, 0x66, 0xd3, 0x60},
+    {0x00, 0x25, 0x6f, 0x4a, 0x4a, 0x7b, 0x31, 0x00},
+    {0x00, 0x00, 0x00, 0x18, 0x3c, 0x24, 0x00, 0x00},
+    {0x3e, 0x7f, 0x41, 0x61, 0x7f, 0x7f, 0x49, 0x49},
+    {0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55},
+    {0x00, 0x61, 0x73, 0x5a, 0x4e, 0x47, 0x43, 0x00},
+    {0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55},
+    {0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55},
+    {0x00, 0x00, 0x00, 0x06, 0x0e, 0x08, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x02, 0x0e, 0x0c, 0x00, 0x00},
+    {0x00, 0x06, 0x0e, 0x08, 0x06, 0x0e, 0x08, 0x00},
+    {0x00, 0x02, 0x0e, 0x0c, 0x02, 0x0e, 0x0c, 0x00},
+    {0x00, 0x00, 0x18, 0x3c, 0x3c, 0x3c, 0x18, 0x00},
+    {0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x00, 0x00},
+    {0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00},
+    {0x00, 0x04, 0x06, 0x02, 0x04, 0x06, 0x02, 0x00},
+    {0x01, 0x0f, 0x0f, 0x01, 0x0e, 0x02, 0x0f, 0x0f},
+    {0x00, 0x25, 0x6f, 0x4a, 0x4a, 0x7b, 0x31, 0x00},
+    {0x00, 0x00, 0x00, 0x24, 0x3c, 0x18, 0x00, 0x00},
+    {0x3c, 0x7e, 0x42, 0x62, 0x7e, 0x7e, 0x52, 0x52},
+    {0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55},
+    {0x00, 0x01, 0x63, 0x72, 0x5a, 0x4e, 0x47, 0x01},
+    {0x00, 0x05, 0x0d, 0x78, 0x78, 0x0d, 0x05, 0x00},
+    {0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55},
+    {0x00, 0x00, 0x00, 0x7d, 0x7d, 0x00, 0x00, 0x00},
+    {0x00, 0x38, 0x7c, 0x44, 0xfe, 0x44, 0x6c, 0x28},
+    {0x00, 0x90, 0xfc, 0xfe, 0x92, 0x92, 0xc6, 0x44},
+    {0x00, 0x42, 0x5a, 0x3c, 0x24, 0x3c, 0x5a, 0x42},
+    {0x00, 0x52, 0x56, 0xfc, 0xfc, 0x56, 0x52, 0x00},
+    {0x00, 0x00, 0x00, 0xf7, 0xf7, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x1a, 0xbf, 0xa5, 0xfd, 0x58, 0x00},
+    {0x00, 0x00, 0x02, 0x02, 0x00, 0x02, 0x02, 0x00},
+    {0x3c, 0x7e, 0xdb, 0xa5, 0xa5, 0xd3, 0x7e, 0x3c},
+    {0x00, 0x10, 0x16, 0x13, 0x13, 0x16, 0x10, 0x00},
+    {0x00, 0x18, 0x3c, 0x24, 0x18, 0x3c, 0x24, 0x00},
+    {0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x38, 0x38},
+    {0x00, 0x00, 0x00, 0x08, 0x08, 0x08, 0x00, 0x00},
+    {0x7e, 0xff, 0x81, 0xbd, 0x95, 0xa9, 0xff, 0x7e},
+    {0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01},
+    {0x00, 0x00, 0x0c, 0x1a, 0x1a, 0x0c, 0x00, 0x00},
+    {0x00, 0x48, 0x48, 0x7e, 0x7e, 0x48, 0x48, 0x00},
+    {0x00, 0x00, 0x19, 0x1d, 0x17, 0x12, 0x00, 0x00},
+    {0x00, 0x00, 0x11, 0x15, 0x1f, 0x0a, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x02, 0x03, 0x01, 0x00, 0x00},
+    {0x00, 0xfe, 0xfe, 0x20, 0x30, 0x3e, 0x7e, 0x40},
+    {0x00, 0x06, 0x0f, 0xff, 0xff, 0x01, 0xff, 0x00},
+    {0x00, 0x00, 0x00, 0x18, 0x18, 0x18, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x40, 0xc0, 0x80, 0x00, 0x00},
+    {0x00, 0x00, 0x12, 0x1f, 0x1f, 0x10, 0x00, 0x00},
+    {0x00, 0x10, 0x17, 0x17, 0x15, 0x17, 0x17, 0x10},
+    {0x00, 0x24, 0x3c, 0x18, 0x24, 0x3c, 0x18, 0x00},
+    {0x09, 0xcf, 0x7f, 0x3c, 0x6e, 0x53, 0xf8, 0xf8},
+    {0x89, 0xcf, 0x6f, 0x38, 0xdc, 0xee, 0xbb, 0x90},
+    {0x91, 0xd5, 0x7f, 0x3a, 0x6c, 0x56, 0xfb, 0xf8},
+    {0x00, 0x60, 0xf0, 0x92, 0x9a, 0xc8, 0x40, 0x00},
+    {0x00, 0x01, 0x7b, 0x7e, 0x24, 0x24, 0x7c, 0x78},
+    {0x00, 0x78, 0x7c, 0x24, 0x24, 0x7e, 0x7b, 0x01},
+    {0x02, 0x7b, 0x7d, 0x25, 0x25, 0x7d, 0x7b, 0x02},
+    {0x02, 0x7b, 0x7d, 0x25, 0x27, 0x7e, 0x7b, 0x01},
+    {0x00, 0x79, 0x7d, 0x24, 0x24, 0x7d, 0x79, 0x00},
+    {0x00, 0x78, 0x7e, 0x25, 0x25, 0x7e, 0x78, 0x00},
+    {0x70, 0x7c, 0x0e, 0x0b, 0x7f, 0x7f, 0x49, 0x49},
+    {0x00, 0x3e, 0x7f, 0x41, 0x41, 0xe3, 0xa2, 0x00},
+    {0x00, 0x01, 0x7f, 0x7e, 0x54, 0x54, 0x54, 0x44},
+    {0x7c, 0x7c, 0x54, 0x54, 0x54, 0x46, 0x03, 0x01},
+    {0x02, 0x03, 0x7d, 0x7d, 0x55, 0x55, 0x03, 0x02},
+    {0x00, 0x7d, 0x7d, 0x54, 0x54, 0x55, 0x45, 0x00},
+    {0x00, 0x00, 0x41, 0x7b, 0x7a, 0x40, 0x00, 0x00},
+    {0x00, 0x00, 0x40, 0x7a, 0x7b, 0x41, 0x00, 0x00},
+    {0x00, 0x02, 0x43, 0x7d, 0x7d, 0x43, 0x02, 0x00},
+    {0x00, 0x01, 0x41, 0x7c, 0x7c, 0x41, 0x01, 0x00},
+    {0x00, 0x11, 0x7f, 0x7f, 0x51, 0x41, 0x7f, 0x3e},
+    {0x02, 0x03, 0x7d, 0x7d, 0x1b, 0x72, 0x7b, 0x01},
+    {0x00, 0x01, 0x3b, 0x7e, 0x44, 0x44, 0x7c, 0x38},
+    {0x00, 0x38, 0x7c, 0x44, 0x44, 0x7e, 0x3b, 0x01},
+    {0x02, 0x3b, 0x7d, 0x45, 0x45, 0x7d, 0x3b, 0x02},
+    {0x02, 0x3b, 0x7d, 0x45, 0x47, 0x7e, 0x3b, 0x01},
+    {0x00, 0x39, 0x7d, 0x44, 0x44, 0x7d, 0x39, 0x00},
+    {0x00, 0x22, 0x36, 0x1c, 0x1c, 0x36, 0x22, 0x00},
+    {0x00, 0x5e, 0x7f, 0x39, 0x5d, 0x46, 0x7f, 0x3d},
+    {0x00, 0x01, 0x3f, 0x7e, 0x40, 0x40, 0x7c, 0x3c},
+    {0x00, 0x3c, 0x7c, 0x40, 0x40, 0x7e, 0x3f, 0x01},
+    {0x02, 0x3b, 0x79, 0x41, 0x41, 0x79, 0x3b, 0x02},
+    {0x00, 0x3d, 0x7d, 0x40, 0x40, 0x7d, 0x3d, 0x00},
+    {0x00, 0x0e, 0x1e, 0x70, 0x72, 0x1b, 0x09, 0x00},
+    {0x00, 0x00, 0x7e, 0x7e, 0x24, 0x3c, 0x18, 0x00},
+    {0x00, 0xfe, 0xff, 0x49, 0x4f, 0x7e, 0x38, 0x00},
+    {0x00, 0x01, 0x7b, 0x7e, 0x24, 0x24, 0x7c, 0x78},
+    {0x00, 0x78, 0x7c, 0x24, 0x24, 0x7e, 0x7b, 0x01},
+    {0x02, 0x7b, 0x7d, 0x25, 0x25, 0x7d, 0x7b, 0x02},
+    {0x02, 0x7b, 0x7d, 0x25, 0x27, 0x7e, 0x7b, 0x01},
+    {0x00, 0x79, 0x7d, 0x24, 0x24, 0x7d, 0x79, 0x00},
+    {0x00, 0x78, 0x7e, 0x25, 0x25, 0x7e, 0x78, 0x00},
+    {0x60, 0x78, 0x1c, 0x16, 0x7e, 0x7e, 0x52, 0x52},
+    {0x00, 0x3c, 0x7e, 0x42, 0x42, 0xe6, 0xa4, 0x00},
+    {0x00, 0x01, 0x7f, 0x7e, 0x54, 0x54, 0x54, 0x44},
+    {0x7c, 0x7c, 0x54, 0x54, 0x54, 0x46, 0x03, 0x01},
+    {0x02, 0x03, 0x7d, 0x7d, 0x55, 0x55, 0x03, 0x02},
+    {0x00, 0x7d, 0x7d, 0x54, 0x54, 0x55, 0x45, 0x00},
+    {0x00, 0x00, 0x41, 0x7b, 0x7a, 0x40, 0x00, 0x00},
+    {0x00, 0x00, 0x40, 0x7a, 0x7b, 0x41, 0x00, 0x00},
+    {0x00, 0x02, 0x43, 0x7d, 0x7d, 0x43, 0x02, 0x00},
+    {0x00, 0x00, 0x41, 0x79, 0x79, 0x41, 0x00, 0x00},
+    {0x00, 0x38, 0x7c, 0x44, 0x44, 0x7f, 0x3f, 0x04},
+    {0x02, 0x03, 0x7d, 0x7d, 0x1b, 0x72, 0x7b, 0x01},
+    {0x00, 0x01, 0x3b, 0x7e, 0x44, 0x44, 0x7c, 0x38},
+    {0x00, 0x38, 0x7c, 0x44, 0x44, 0x7e, 0x3b, 0x01},
+    {0x02, 0x3b, 0x7d, 0x45, 0x45, 0x7d, 0x3b, 0x02},
+    {0x02, 0x3b, 0x7d, 0x45, 0x47, 0x7e, 0x3b, 0x01},
+    {0x00, 0x39, 0x7d, 0x44, 0x44, 0x7d, 0x39, 0x00},
+    {0x00, 0x08, 0x08, 0x2a, 0x2a, 0x08, 0x08, 0x00},
+    {0x00, 0x5c, 0x7e, 0x32, 0x5a, 0x4c, 0x7e, 0x3a},
+    {0x00, 0x01, 0x3f, 0x7e, 0x40, 0x40, 0x7c, 0x3c},
+    {0x00, 0x3c, 0x7c, 0x40, 0x40, 0x7e, 0x3f, 0x01},
+    {0x02, 0x3b, 0x79, 0x41, 0x41, 0x79, 0x3b, 0x02},
+    {0x00, 0x3d, 0x7d, 0x40, 0x40, 0x7d, 0x3d, 0x00},
+    {0x00, 0x08, 0x18, 0x72, 0x73, 0x19, 0x08, 0x00},
+    {0x00, 0x00, 0x7e, 0x7e, 0x24, 0x3c, 0x18, 0x00},
+    {0x00, 0x0d, 0x1d, 0x70, 0x70, 0x1d, 0x0d, 0x00},
+};
+
+uint8_t display_gfx_button[3][64] = {
+    {0x00, 0x00, 0x00, 0xe0, 0x30, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x30, 0xe0, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x07, 0x0c, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x0c, 0x07, 0x00, 0x00, 0x00},
+};
+
+uint8_t display_gfx_button_sel[3][64] = {
+    {0x00, 0x00, 0x00, 0xe0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xe0, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x07, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x07, 0x00, 0x00, 0x00},
+};
+
+uint8_t display_gfx_clock[8] = {0x3c, 0x42, 0x81, 0x9d, 0x91, 0x81, 0x42, 0x3c};
+
+uint8_t display_gfx_menu_head[112] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+uint8_t display_gfx_sad[4][24] = {
+    {0x00, 0x00, 0x00, 0x80, 0xe0, 0x60, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x60, 0xe0, 0x80, 0x00, 0x00, 0x00},
+    {0xf8, 0xff, 0x0f, 0x01, 0x01, 0x00, 0x00, 0x7c, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c, 0x7c, 0x00, 0x00, 0x01, 0x01, 0x0f, 0xff, 0xf8},
+    {0x1f, 0xff, 0xf0, 0x80, 0x00, 0x40, 0x30, 0x38, 0x18, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x18, 0x38, 0x30, 0x40, 0x00, 0x80, 0xf0, 0xff, 0x1f},
+    {0x00, 0x00, 0x00, 0x01, 0x07, 0x06, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x06, 0x07, 0x01, 0x00, 0x00, 0x00},
+};
+
+uint8_t display_gfx_smile[4][24] = {
+    {0x00, 0x00, 0x00, 0x80, 0xe0, 0x60, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x60, 0xe0, 0x80, 0x00, 0x00, 0x00},
+    {0xf8, 0xff, 0x0f, 0x01, 0x01, 0x00, 0x00, 0xfc, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfc, 0x00, 0x00, 0x01, 0x01, 0x0f, 0xff, 0xf8},
+    {0x1f, 0xff, 0xf0, 0x80, 0x86, 0x06, 0x18, 0x38, 0x30, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0x30, 0x38, 0x18, 0x06, 0x86, 0x80, 0xf0, 0xff, 0x1f},
+    {0x00, 0x00, 0x00, 0x01, 0x07, 0x06, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x06, 0x07, 0x01, 0x00, 0x00, 0x00},
+};
+
+uint8_t display_gfx_question[4][24] = {
+    {0x00, 0x00, 0x00, 0x80, 0xe0, 0x60, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x60, 0xe0, 0x80, 0x00, 0x00, 0x00},
+    {0xf8, 0xff, 0x0f, 0x01, 0x01, 0x00, 0x00, 0xfc, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfc, 0x00, 0x00, 0x01, 0x01, 0x0f, 0xff, 0xf8},
+    {0x1f, 0xff, 0xf0, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x04, 0x26, 0xb2, 0x92, 0x1e, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0xf0, 0xff, 0x1f},
+    {0x00, 0x00, 0x00, 0x01, 0x07, 0x06, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x06, 0x07, 0x01, 0x00, 0x00, 0x00},
+};
+
+uint8_t display_gfx_wifi[8] = {0x00, 0x02, 0x0a, 0x2a, 0x2a, 0x0a, 0x02, 0x00};
+
+uint8_t display_gfx_wifi_low[8] = {0x00, 0x00, 0x08, 0x28, 0x28, 0x08, 0x00, 0x00};
+
+uint8_t display_gfx_wifi_lowest[8] = {0x00, 0x00, 0x00, 0x20, 0x20, 0x00, 0x00, 0x00};
+
+uint8_t display_gfx_arrow_down[8] = {0x08, 0x18, 0x38, 0x78, 0x78, 0x38, 0x18, 0x08};
+
+uint8_t display_gfx_arrow_left[8] = {0x00, 0x18, 0x3c, 0x7e, 0xff, 0x00, 0x00, 0x00};
+
+uint8_t display_gfx_arrow_right[8] = {0x00, 0x00, 0x00, 0xff, 0x7e, 0x3c, 0x18, 0x00};
+
+uint8_t display_gfx_arrow_up[8] = {0x10, 0x18, 0x1c, 0x1e, 0x1e, 0x1c, 0x18, 0x10};
+
+uint8_t display_gfx_cross[8] = {0x00, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x00};
+
+uint8_t display_gfx_logo[8][64] = {
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0x80, 0x80, 0x86, 0x06, 0x06, 0x0e, 0x0e, 0x1e, 0x1e, 0x3e, 0x3c, 0x7c, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xf0, 0xe0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0x80, 0x80, 0x86, 0x06, 0x06, 0x0e, 0x0e, 0x1e, 0x1e, 0x3e, 0x3c, 0x7c, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xf0, 0xe0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0x80, 0x80, 0x86, 0x06, 0x06, 0x0e, 0x0e, 0x1e, 0x1e, 0x3e, 0x3c, 0x7c, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xf0, 0xe0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0x80, 0x80, 0x86, 0x06, 0x06, 0x0e, 0x0e, 0x1e, 0x1e, 0x3e, 0x3c, 0x7c, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xf0, 0xe0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0x80, 0x80, 0x86, 0x06, 0x06, 0x0e, 0x0e, 0x1e, 0x1e, 0x3e, 0x3c, 0x7c, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xf0, 0xe0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0x80, 0x80, 0x86, 0x06, 0x06, 0x0e, 0x0e, 0x1e, 0x1e, 0x3e, 0x3c, 0x7c, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xf0, 0xe0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0x80, 0x80, 0x86, 0x06, 0x06, 0x0e, 0x0e, 0x1e, 0x1e, 0x3e, 0x3c, 0x7c, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xf0, 0xe0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xe0, 0xe0, 0xe0, 0xe0, 0xc0, 0xc0, 0xc0, 0x80, 0x80, 0x86, 0x06, 0x06, 0x0e, 0x0e, 0x1e, 0x1e, 0x3e, 0x3c, 0x7c, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xf0, 0xe0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+};
@@ -0,0 +1,62 @@
+// Copyright 2020 Lukas Haubaum
+//
+// Licensed under the GNU Affero General Public License, Version 3;
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     https://www.gnu.org/licenses/agpl-3.0.html
+//
+// 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.
+/**
+ * @file
+ * 
+ * @brief gfx elements: font, icons, elements
+ *  
+ */
+#ifndef _display_GFX_H_
+#define _display_GFX_H_
+
+#include <stdint.h>
+
+uint8_t display_gfx_clear[8];
+
+// Dogica Font https://www.dafont.com/de/dogica.font starting at space (32)
+uint8_t display_gfx_font[224][8];
+
+uint8_t display_gfx_button[3][64];
+
+uint8_t display_gfx_button_sel[3][64];
+
+uint8_t display_gfx_clock[8];
+
+uint8_t display_gfx_menu_head[112];
+
+uint8_t display_gfx_sad[4][24];
+
+uint8_t display_gfx_smile[4][24];
+
+uint8_t display_gfx_question[4][24];
+
+uint8_t display_gfx_wifi[8];
+
+uint8_t display_gfx_wifi_low[8];
+
+uint8_t display_gfx_wifi_lowest[8];
+
+uint8_t display_gfx_arrow_down[8];
+
+uint8_t display_gfx_arrow_left[8];
+
+uint8_t display_gfx_arrow_right[8];
+
+uint8_t display_gfx_arrow_up[8];
+
+uint8_t display_gfx_cross[8];
+
+uint8_t display_gfx_logo[8][64];
+
+#endif
@@ -0,0 +1,90 @@
+// Copyright 2020 Lukas Haubaum
+//
+// Licensed under the GNU Affero General Public License, Version 3;
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     https://www.gnu.org/licenses/agpl-3.0.html
+//
+// 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 <string.h>
+
+#include "display.h"
+#include "display-gfx.h"
+
+uint8_t display_utf8_to_ascii_char(uint8_t ascii)
+{
+    static uint8_t c1;
+    if (ascii < 128) // Standard ASCII-set 0..0x7F handling
+    {
+        c1 = 0;
+        return (ascii);
+    }
+
+    // get previous input
+    uint8_t last = c1; // get last char
+    c1 = ascii;        // remember actual character
+
+    switch (last) // conversion depending on first UTF8-character
+    {
+    case 0xC2:
+        return (ascii);
+        break;
+    case 0xC3:
+        return (ascii | 0xC0);
+        break;
+    case 0x82:
+        if (ascii == 0xAC)
+            return (0x80); // special case Euro-symbol
+    }
+
+    return (0); // otherwise: return zero, if character has to be ignored
+}
+
+void display_utf8_to_ascii(char *input, char *output)
+{
+    strcpy(output, input);
+    int k = 0;
+    char c;
+    for (int i = 0; i < strlen(output); i++)
+    {
+        c = display_utf8_to_ascii_char(output[i]);
+        if (c != 0)
+            output[k++] = c;
+    }
+    output[k] = 0;
+}
+
+uint8_t *display_text_to_data(char *text, size_t text_length, size_t *length)
+{
+    char target_text[strlen(text)];
+    display_utf8_to_ascii(text, target_text);
+
+    uint8_t font_width = sizeof(display_gfx_font[0]);
+
+    *length = text_length * font_width;
+
+    uint8_t *data = calloc(*length, sizeof(uint8_t));
+    for (uint8_t i = 0; i < text_length; i++)
+    {
+        memcpy(&data[i * font_width], display_gfx_font[(uint8_t)target_text[i] - 32], font_width);
+    }
+
+    return data;
+}
+
+void display_chars(char *text, size_t length, uint8_t line, uint8_t offset, bool invert)
+{
+    if (length > 0)
+    {
+        uint8_t font_width = sizeof(display_gfx_font[0]);
+        size_t res_length = 0;
+        uint8_t *textdata = display_text_to_data(text, length, &res_length);
+        display_data(textdata, res_length, line, offset * font_width, invert);
+        free(textdata);
+    }
+}
@@ -0,0 +1,125 @@
+// Copyright 2020 Lukas Haubaum
+//
+// Licensed under the GNU Affero General Public License, Version 3;
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     https://www.gnu.org/licenses/agpl-3.0.html
+//
+// 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.
+/**
+ * @file
+ * 
+ * @brief interface for display
+ *  
+ */
+#ifndef _display_H_
+#define _display_H_
+
+#include "esp_system.h"
+
+/**
+ * 
+ */
+void display_utf8_to_ascii(char *input, char *output);
+
+/**
+ * 
+ */
+uint8_t *display_text_to_data(char *text, size_t text_length, size_t *length);
+
+/**
+ * @brief initalize display
+ */
+void display_start(void);
+
+/**
+ * @brief clear the display
+ * 
+ * @param[in] line the line to clear
+ * @param[in] invert if true, image is inverted
+ */
+void display_clear_line( uint8_t line, bool invert);
+
+/**
+ * @brief clear the display
+ * 
+ */
+void display_clear(void);
+
+/**
+ * @brief set display on or offf
+ * 
+ * @param[in] on true if display on, false if display off
+ */
+void display_on(bool on);
+
+/**
+ * 
+ */
+uint8_t *display_text_to_data(char *text, size_t text_length, size_t *length);
+
+/**
+ * @brief write raw bytes to display line at starting column
+ * 
+ * @param[in] data bytes to display  
+ * @param[in] length length of data
+ * @param[in] line the line to write to
+ * @param[in] offset number of offset chars to start
+ * @param[in] invert if true, image is inverted
+ */
+void display_data(uint8_t *data, size_t length, uint8_t line, uint8_t offset, bool invert);
+
+/**
+ * @brief write chars to display
+ * 
+ * @param[in] text text to display  
+ * @param[in] length length of text
+ * @param[in] line the line to write to
+ * @param[in] offset number of offset chars to start
+ * @param[in] invert if true, image is inverted
+ */
+void display_chars(char *text, size_t length, uint8_t line, uint8_t offset, bool invert);
+
+/**
+ * @brief write text to display line at starting column
+ * 
+ * @param[in] text text to display  
+ * @param[in] line the line to write to
+ * @param[in] offset number of offset chars to start
+ * @param[in] invert if true, image is inverted
+ */
+void display_text_line_column(char *text, uint8_t line, uint8_t offset, bool invert);
+
+/**
+ * @brief write text to display line
+ * 
+ * @param[in] text text to display  
+ * @param[in] line the line to write to
+ * @param[in] invert if true, image is inverted
+ */
+void display_text_line(char *text, uint8_t line, bool invert);
+
+/**
+ * @brief display a button element
+ * 
+ * @param[in] text button text
+ * @param[in] selected is button selected
+ * @param[in] primary is button primary
+ */
+void display_set_button(char *text, bool selected, bool primary);
+
+/**
+ * @brief display a menu headline
+ * 
+ * @param[in] text headline text
+ * @param[in] arrows if left right arrows should be displays
+ * @param[in] line line the line to write to
+ */
+void display_menu_headline(char *text, bool arrows, uint8_t line);
+
+#endif