My fork of the InkPlate SDK.
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# ESP-IDF-InkPlate Library Version 0.9.3
(March 2, 2021)
2 years ago
Version 0.9.3: Change required by ESP-IDF Version 4.2 for the SD Card support. Thanks to Yuki Mizuno for the supplied patch.
2 years ago
A porting effort to the ESP-IDF framework for the e-Radionica InkPlate software that can be find [here](
2 years ago
--> Work in progress. It is usable, but testing remains to be completed. <--
Look in the `examples` folder for ready-made applications. This library is conform to the PlatformIO IDE extension. All examples can be compiled using PlatformIO.
Information about the modifications is located in file ****
## ESP-IDF configuration specifics for InkPlate devices
An InkPlate application requires some functionalities to be properly set up within the ESP-IDF. The following elements have been done for this project and can be used as a reference for other projects:
- **PSRAM memory management**: The PSRAM is an extension to the ESP32 memory that offers 4MB+4MB of additional RAM. The first 4MB is readily available to integrate into the dynamic memory allocation of the ESP-IDF SDK. To do so, some parameters located in the `sdkconfig` file must be set accordingly. This must be done using the menuconfig application that is part of the ESP-IDF. The following command will launch the application (the current folder must be the main folder of EPub-InkPlate):
$ menuconfig
The application will show a list of configuration aspects. To configure PSRAM:
- Select `Component Config` > `ESP32-Specific` > `Support for external, SPI-Connected RAM`
- Select `SPI RAM config` > `Initialize SPI RAM during startup`
- Select `Run memory test on SPI RAM Initialization`
- Select `Enable workaround for bug in SPI RAM cache for Rev 1 ESP32s`
- Select `SPI RAM access method` > `Make RAM allocatable using malloc() as well`
Leave the other options as they are.
- **ESP32 processor speed**: The processor must be run at 240MHz. The following line in `platformio.ini` request this speed:
board_build.f_cpu = 240000000L
You can also select the speed in the sdkconfig file:
- Select `Component config` > `ESP32-Specific` > `CPU frequency` > `240 Mhz`
- **FAT Filesystem Support**: If the application requires the usage of the micro SD card. This card must be formatted on a computer (Linux or Windows) with a FAT 32 partition. The InkPlate6Ctrl class requires this in its current configuration. The following parameters must be adjusted in `sdkconfig`:
- Select `Component config` > `FAT Filesystem support` > `Max Long filename length` > `255`
- Select `Number of simultaneously open files protected by lock function` > `5`
- Select `Prefer external RAM when allocating FATFS buffer`
- **Flash memory partitioning (optional)**: the file `partitions.csv` contains the table of partitions definition for the 4MB flash memory, required to support the largest applications size in an OTA context. The partitions OTA_0 and OTA_1 have been set to be 1.3MB in size. In the `platformio.ini` file, the line `board_build.partitions=...` is directing the use of these partitions configuration.