6c5e37d6d2
Added some categories to tasksInterruptsetc New docu to give some information about hardware timer Added description of notification between tasks
1.2 KiB
Internals
RTOS and the SDK for ESP32 bring up some new screws and bolts. In this document, we will list at least some of them.
##Tasks## Rtos supports a simple form of tasks. These tasks get a priority on start and some other information.
| Task | Stack | Priority | CPU |
|---|---|---|---|
| EspruinoTask | 10000 | 5 | 0 |
| ConsoleTask | 2048 | 20 | 0 |
| TimerTask | 2048 | 19 | 0 |
##Interrupt Level## Each realtime OS uses interrupts, and so does RTOS. There are some predefined or reserved for future use. For more info see esp-idf/components/esp32/include/soc/soc.h line 259ff..
Based on actual version of esp-idf, interrupt levels are assigned automatically.
##Timer## ESP32 generally support 2 groups of timers each having 2 timer. Timer is used for interrupt driven handling inside Espruino like Waveforms.
| Group | Timer | used for |
|---|---|---|
| 0 | 0 | Espruino Util Timer |
| 0 | 1 | testing only |
| 1 | 0 | free |
| 1 | 1 | free |
##Uarts## ESP32 supports 3 uarts, which can be assigned to GPIO ports. Espruino right now only uses uart_num_0 for console.
| Uart | used for |
|---|---|
| uart_num_0 | espruino console |
| uart_num_1 | free |
| uart_num_2 | free |