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remove tusb_hal_millis() usage, less work for porting

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hathach
2019-03-24 01:19:32 +07:00
parent 29e075b8b9
commit 18f248b142
36 changed files with 71 additions and 244 deletions
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docs/porting.md
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@@ -53,12 +53,6 @@ The OS Abstraction Layer is responsible for providing basic data structures for
The code is almost entirely agnostic of MCU and lives in `src/osal`.
#### tusb_hal_millis
The OPT_OS_NONE option is the only option which requires an MCU specific function. It needs `tusb_hal_millis` to measure the passage of time. On ARM this is commonly done with SysTick. The function returns the elapsed number of milliseconds since startup.
`tusb_hal_millis` is also provided in `hw/bsp/<board name>/board_<board name>.c` because it may vary with MCU use.
### Device API
After the USB device is setup, the USB device code works by processing events on the main thread (by calling `tud_task`). These events are queued by the USB interrupt handler. So, there are three parts to the device low-level API: device setup, endpoint setup and interrupt processing.