248 lines
7.2 KiB
C
248 lines
7.2 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "bsp/board_api.h"
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#include "tusb.h"
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#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
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// ESP-IDF need "freertos/" prefix in include path.
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// CFG_TUSB_OS_INC_PATH should be defined accordingly.
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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#include "freertos/queue.h"
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#include "freertos/task.h"
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#include "freertos/timers.h"
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#define USBD_STACK_SIZE 4096
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#else
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#include "FreeRTOS.h"
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#include "semphr.h"
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#include "queue.h"
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#include "task.h"
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#include "timers.h"
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// Increase stack size when debug log is enabled
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#define USBD_STACK_SIZE (3*configMINIMAL_STACK_SIZE/2) * (CFG_TUSB_DEBUG ? 2 : 1)
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#endif
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#define CDC_STACK_SIZE configMINIMAL_STACK_SIZE
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#define BLINKY_STACK_SIZE configMINIMAL_STACK_SIZE
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//--------------------------------------------------------------------+
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// MACRO CONSTANT TYPEDEF PROTOTYPES
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//--------------------------------------------------------------------+
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/* Blink pattern
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* - 250 ms : device not mounted
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* - 1000 ms : device mounted
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* - 2500 ms : device is suspended
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*/
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enum {
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BLINK_NOT_MOUNTED = 250,
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BLINK_MOUNTED = 1000,
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BLINK_SUSPENDED = 2500,
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};
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// static task
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#if configSUPPORT_STATIC_ALLOCATION
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StackType_t blinky_stack[BLINKY_STACK_SIZE];
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StaticTask_t blinky_taskdef;
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StackType_t usb_device_stack[USBD_STACK_SIZE];
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StaticTask_t usb_device_taskdef;
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StackType_t cdc_stack[CDC_STACK_SIZE];
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StaticTask_t cdc_taskdef;
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#endif
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static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
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static void usb_device_task(void *param);
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void led_blinking_task(void* param);
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void cdc_task(void *params);
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//--------------------------------------------------------------------+
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// Main
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//--------------------------------------------------------------------+
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int main(void) {
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board_init();
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#if configSUPPORT_STATIC_ALLOCATION
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// blinky task
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xTaskCreateStatic(led_blinking_task, "blinky", BLINKY_STACK_SIZE, NULL, 1, blinky_stack, &blinky_taskdef);
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// Create a task for tinyusb device stack
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xTaskCreateStatic(usb_device_task, "usbd", USBD_STACK_SIZE, NULL, configMAX_PRIORITIES-1, usb_device_stack, &usb_device_taskdef);
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// Create CDC task
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xTaskCreateStatic(cdc_task, "cdc", CDC_STACK_SIZE, NULL, configMAX_PRIORITIES - 2, cdc_stack, &cdc_taskdef);
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#else
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xTaskCreate(led_blinking_task, "blinky", BLINKY_STACK_SIZE, NULL, 1, NULL);
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xTaskCreate(usb_device_task, "usbd", USBD_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL);
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xTaskCreate(cdc_task, "cdc", CDC_STACK_SZIE, NULL, configMAX_PRIORITIES - 2, NULL);
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#endif
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// skip starting scheduler (and return) for ESP32-S2 or ESP32-S3
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#if !TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
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vTaskStartScheduler();
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#endif
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return 0;
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}
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#if TU_CHECK_MCU(OPT_MCU_ESP32S2, OPT_MCU_ESP32S3)
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void app_main(void) {
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main();
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}
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#endif
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// USB Device Driver task
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// This top level thread process all usb events and invoke callbacks
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static void usb_device_task(void *param) {
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(void) param;
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// init device stack on configured roothub port
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// This should be called after scheduler/kernel is started.
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// Otherwise it could cause kernel issue since USB IRQ handler does use RTOS queue API.
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tud_init(BOARD_TUD_RHPORT);
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if (board_init_after_tusb) {
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board_init_after_tusb();
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}
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// RTOS forever loop
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while (1) {
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// put this thread to waiting state until there is new events
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tud_task();
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// following code only run if tud_task() process at least 1 event
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tud_cdc_write_flush();
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}
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}
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//--------------------------------------------------------------------+
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// Device callbacks
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//--------------------------------------------------------------------+
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// Invoked when device is mounted
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void tud_mount_cb(void) {
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blink_interval_ms = BLINK_MOUNTED;
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}
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// Invoked when device is unmounted
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void tud_umount_cb(void) {
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blink_interval_ms = BLINK_NOT_MOUNTED;
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}
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// Invoked when usb bus is suspended
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// remote_wakeup_en : if host allow us to perform remote wakeup
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// Within 7ms, device must draw an average of current less than 2.5 mA from bus
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void tud_suspend_cb(bool remote_wakeup_en) {
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(void) remote_wakeup_en;
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blink_interval_ms = BLINK_SUSPENDED;
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}
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// Invoked when usb bus is resumed
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void tud_resume_cb(void) {
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blink_interval_ms = tud_mounted() ? BLINK_MOUNTED : BLINK_NOT_MOUNTED;
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}
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//--------------------------------------------------------------------+
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// USB CDC
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//--------------------------------------------------------------------+
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void cdc_task(void *params) {
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(void) params;
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// RTOS forever loop
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while (1) {
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// connected() check for DTR bit
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// Most but not all terminal client set this when making connection
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// if ( tud_cdc_connected() )
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{
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// There are data available
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while (tud_cdc_available()) {
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uint8_t buf[64];
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// read and echo back
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uint32_t count = tud_cdc_read(buf, sizeof(buf));
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(void) count;
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// Echo back
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// Note: Skip echo by commenting out write() and write_flush()
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// for throughput test e.g
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// $ dd if=/dev/zero of=/dev/ttyACM0 count=10000
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tud_cdc_write(buf, count);
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}
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tud_cdc_write_flush();
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}
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// For ESP32-Sx this delay is essential to allow idle how to run and reset watchdog
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vTaskDelay(1);
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}
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}
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// Invoked when cdc when line state changed e.g connected/disconnected
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void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts) {
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(void) itf;
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(void) rts;
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// TODO set some indicator
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if (dtr) {
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// Terminal connected
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} else {
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// Terminal disconnected
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}
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}
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// Invoked when CDC interface received data from host
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void tud_cdc_rx_cb(uint8_t itf) {
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(void) itf;
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}
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//--------------------------------------------------------------------+
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// BLINKING TASK
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//--------------------------------------------------------------------+
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void led_blinking_task(void* param) {
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(void) param;
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static uint32_t start_ms = 0;
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static bool led_state = false;
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while (1) {
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// Blink every interval ms
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vTaskDelay(blink_interval_ms / portTICK_PERIOD_MS);
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start_ms += blink_interval_ms;
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board_led_write(led_state);
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led_state = 1 - led_state; // toggle
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}
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}
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