78 lines
1.6 KiB
Markdown
78 lines
1.6 KiB
Markdown
# CAN Module
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| Since | Origin / Contributor | Maintainer | Source |
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| :----- | :-------------------- | :---------- | :------ |
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| 2017-04-27 | [@ThomasBarth](https://github.com/ThomasBarth/ESP32-CAN-Driver/), zelll | | [can.c](../../../components/modules/can.c)|
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The CAN module provides access to the in-built CAN controller.
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## can.send()
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Send a frame.
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#### Syntax
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`can.send(format, msg_id, data)`
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#### Parameters
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- `format` Frame format. `can.STANDARD_FRAME` or `can.EXTENDED_FRAME`
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- `msg_id` CAN Messge ID
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- `data` CAN data, up to 8 bytes
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#### Returns
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nil
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## can.setup()
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Configuration CAN controller.
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#### Syntax
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```lua
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can.setup({
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speed = 1000,
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tx = 5,
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rx = 4,
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dual_filter = false,
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code = 0,
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mask = 0xffffffff
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}, function(format, msg_id, data) end)
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```
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#### Parameters
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- `config`
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- `speed` kbps. One of following value: `1000`, `800`, `500`, `250`, `100`.
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- `tx` Pin num for TX.
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- `rx` Pin num for RX.
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- `dual_filter` `true` dual filter mode, `false` single filter mode (default)
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- `code` 4-bytes integer. Use this with mask to filter CAN frame. Default: `0`. See [SJA1000](http://www.nxp.com/documents/data_sheet/SJA1000.pdf)
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- `mask` 4-bytes integer. Default: `0xffffffff`
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- `callback` function to be called when CAN data received.
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- `format` Frame format. `can.STANDARD_FRAME` or `can.EXTENDED_FRAME`
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- `msg_id` CAN Messge ID
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- `data` CAN data, up to 8 bytes
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#### Returns
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nil
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## can.start()
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Start CAN controller.
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#### Syntax
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`can.start()`
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#### Parameters
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#### Returns
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nil
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## can.stop()
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Stop CAN controller.
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#### Syntax
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`can.stop()`
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#### Parameters
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#### Returns
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nil
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