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libretiny/docs/platform/beken-72xx/README.md
Kuba Szczodrzyński 85b5b1df91 [beken-72xx] Add base BK7231 support config
2022-06-13 16:58:46 +02:00

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Beken 72xx - notes

There are many chip variations in this SoC family:

  • BK7231
  • BK7231T
  • BK7231N
  • BK7231S
  • BK7231U

The "officially existing" ones are BK7231, BK7231N and BK7231U. These are supported by Beken SDKs, such as bdk_freertos, although bk7231s_alios_sdk also existed at some point.

  • BK7231N is substantially different than the other chips, so running T code on N (and vice versa) is not directly possible.
  • BK7231 does not have eFuse.
  • there are some references to U meaning USB support
  • T seems to be exclusive to Tuya boards (that would explain the name); in the T SDK from Tuya, CFG_SOC_NAME is set to SOC_BK7231U
  • T's bootloader greets with BK7231S_1.0.5 on UART

Regarding bdk_freertos:

  • make allows selecting for which MCU the code should be compiled
  • make bk7231 doesn't compile at all
  • make bk7231u doesn't run on T with Tuya's bootloader (1.0.5), though it works just fine after replacing the bootloader with one of these included with bdk_freertos (1.0.8) (yes, even bk7231n bootloader)
  • after making a few changes to driver/entry and driver/intc (so it looks more like the code from T SDK) bdk_freertos runs just fine