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| esp_lyrat_can_board [2023/03/02 22:39] – oliver | esp_lyrat_can_board [2023/03/04 07:03] (current) – removed robertnixdorf |
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| ====== ESP LyraT CAN board ====== | |
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| A [[https://docs.espressif.com/projects/esp-adf/en/latest/design-guide/dev-boards/board-esp32-lyrat-v4.3.html|LyraT v4.3]] wired up to an ESP-less [[https://github.com/airgiants/ESP32-NODE|unfurl node]]. We redefine the JTAG pins as a CAN ([[https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/twai.html|TWAI]]) interface and connect them directly to the pads on the node board that are connected to the [[https://www.ti.com/lit/ds/symlink/sn65hvd230.pdf|CAN bus transceiver]]. | |
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| The goal is to prototype an ESP-based "Audio Node" to replace the Beaglebone board for playing the creature sounds | |
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| {{https://wiki.airgiants.co.uk//lib/plugins/ckgedit/fckeditor/userfiles/image/img_20230301_111810.jpg?nolink&460x345|wiki.airgiants.co.uk_lib_plugins_ckgedit_fckeditor_userfiles_image_img_20230301_111810.jpg}} | |
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| ===== Wiring ===== | |
| <font 14px/inherit;;inherit;;inherit>MTDI (GPIO_12) → CAN_D (GPIO_5)</font> | |
| <font 14px/inherit;;inherit;;inherit>MTDO (GPIO_14) → CAN_R (GPIO_4)</font> | |
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| 3.3V and GND come from the Lyra board | |
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| DIP switches 3, 4, 5, 6, 7 are in the ON position, and the SD card has to be in 1-wire mode. | |
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| {{:esp_lyrat_can_dips.jpg?nolink&460x345|esp_lyrat_can_dips.jpg}} | |
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| {{:esp_lyrat_can_pads.jpg?nolink&460x345|esp_lyrat_can_pads.jpg}} | |
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| A basic CAN example from ESP-IDF is being used to test it with an [[https://jbrengineering.co.uk/web-dfu/|Entree CAN interface]] running the candlelight firmware. | |
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