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38 lines
2.1 KiB
Markdown
38 lines
2.1 KiB
Markdown
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# BTstack port for WICED platform using H5 transport and Broadcom/Cypress Bluetooth chipsets.
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Only tested on Redbear Duo platform. Please install [RedBear WICED Add-On](https://github.com/redbear/WICED-SDK) first.
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To integrate BTstack into the WICED SDK, please move the BTstack project into WICED-SDK-3.5.2/libraries.
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Then create projects for BTstack examples in WICED/apps/btstack by running:
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./create_examples.py
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Now, the BTstack examples can be build from the WICED root in the same way as other examples, e.g.:
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./make btstack.spp_and_le_counter-RB_DUO
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to build the SPP-and-LE-Counter example for the RedBear Duo.
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See WICED documentation about how to install it.
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It should work with all WICED platforms that contain a Broadcom Bluetooth chipset.
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The maximal baud rate is limited to 2 mbps.
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The port uses the generated WIFI address plus 1 as Bluetooth MAC address.
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It stores Classic Link Keys using the DCT mechanism.
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All examples that rovide a GATT Server use the GATT DB in the .gatt file. Therefore you need to run ./update_gatt_db.sh in the apps/btstack/$(EXAMPLE) folder after modifying the .gatt file.
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## Notes on the H5 port
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If the CTR/RTS hardware control lines of the Bluetooth Controller is connected to your MCU, we recommend using the wiced-h4 port instead.
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If they are not connected, H5 is required to provide a reliable connecion including retransmissions in both directions.
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There are a few oddities so far that have been worked around in H5 mode:
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- It does not seem possible to upload the FW Mini Driver a.k.a. patchram a.k.a. init script via H5. BTstack uses btstack_chipset_bcm_download_firmware.c to upload the FW Mini Driver via a minimal H4 implementation, before starting up in H5 mode. BCM/CYP chipsets able to switch to H5.
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- With the AP6212A on the RedBear Duo and the FW Mini Driver from WICED-SDK-3.5.2/libraries/drivers/bluetooth/firmware/43438A1/26MHz/bt_firmware_image.c, the HCI LE Encrypt command to perform an AES128 encryption seems to hang in H5 (but works in H4). As a work around, BTstack was configured to use a CPU implementation of AES128 (#define HAVE_AES128).
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