mirror of
https://github.com/hathach/tinyusb.git
synced 2025-01-17 05:32:55 +08:00
48 lines
1.7 KiB
Markdown
48 lines
1.7 KiB
Markdown
# Demos #
|
|
|
|
For simplicity and user's convenience, there are only 2 basic application demos which are *Device* and *Host* respectively. Each application demo, however, has a few projects, each for its supported RTOS. For instance, in addition to the *src* folder, you will also find in the /demo/device
|
|
|
|
- device\_os\_none for no RTOS
|
|
- device\_freertos for freeRTOS
|
|
- device\_cmsis_rtx for ARM CMSIS with RTX implemenation
|
|
|
|
To be able to have the same application code running across RTOSes, the application make use of the "internal" **OSAL layer**. Thus this makes the application code a bit weird and over-complicated than it should be in some (many) cases. This is absolutely not necessary in product development. User can just use the native API function of supported RTOS or a state machine or blocking wait in case of none OS. For example, instead of the blinking task in application
|
|
|
|
~~~{.c}
|
|
OSAL_TASK_FUNCTION( led_blinking_task , p_task_para)
|
|
{
|
|
OSAL_TASK_LOOP_BEGIN
|
|
|
|
static uint32_t led_on_mask = 0;
|
|
|
|
osal_task_delay(led_blink_interval_ms);
|
|
|
|
board_leds(led_on_mask, 1 - led_on_mask);
|
|
led_on_mask = 1 - led_on_mask; // toggle
|
|
|
|
OSAL_TASK_LOOP_END
|
|
}
|
|
~~~
|
|
|
|
can be written in FreeRTOS's native API
|
|
|
|
~~~{.c}
|
|
void led_blinking_task( void * p_task_para )
|
|
{
|
|
while(1)
|
|
{
|
|
static uint32_t led_on_mask = 0;
|
|
|
|
// FreeRTOS API's vTaskDelay is used in place of osal_task_delay. Note it takes input parameter in tick
|
|
vTaskDelay( (led_blink_interval_ms * CFG_TUSB_TICKS_HZ) / 1000);
|
|
|
|
board_leds(led_on_mask, 1 - led_on_mask);
|
|
led_on_mask = 1 - led_on_mask; // toggle
|
|
}
|
|
}
|
|
~~~
|
|
|
|
|
|
[//]: # (\subpage md_demos_readme)
|
|
[//]: # (\subpage md_demos_device_readme)
|
|
[//]: # (\subpage md_demos_host_readme) |