diff options
Diffstat (limited to 'tinyusb/examples/device/cdc_msc_freertos/src/main.c')
-rwxr-xr-x | tinyusb/examples/device/cdc_msc_freertos/src/main.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/tinyusb/examples/device/cdc_msc_freertos/src/main.c b/tinyusb/examples/device/cdc_msc_freertos/src/main.c new file mode 100755 index 00000000..c27b7fed --- /dev/null +++ b/tinyusb/examples/device/cdc_msc_freertos/src/main.c @@ -0,0 +1,230 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2019 Ha Thach (tinyusb.org) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + */ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "FreeRTOS.h" +#include "task.h" +#include "timers.h" +#include "queue.h" +#include "semphr.h" + +#include "bsp/board.h" +#include "tusb.h" + +//--------------------------------------------------------------------+ +// MACRO CONSTANT TYPEDEF PROTYPES +//--------------------------------------------------------------------+ + +/* Blink pattern + * - 250 ms : device not mounted + * - 1000 ms : device mounted + * - 2500 ms : device is suspended + */ +enum { + BLINK_NOT_MOUNTED = 250, + BLINK_MOUNTED = 1000, + BLINK_SUSPENDED = 2500, +}; + +// static timer +StaticTimer_t blinky_tmdef; +TimerHandle_t blinky_tm; + +// static task for usbd +// Increase stack size when debug log is enabled +#if CFG_TUSB_DEBUG + #define USBD_STACK_SIZE (3*configMINIMAL_STACK_SIZE) +#else + #define USBD_STACK_SIZE (3*configMINIMAL_STACK_SIZE/2) +#endif + +StackType_t usb_device_stack[USBD_STACK_SIZE]; +StaticTask_t usb_device_taskdef; + +// static task for cdc +#define CDC_STACK_SZIE configMINIMAL_STACK_SIZE +StackType_t cdc_stack[CDC_STACK_SZIE]; +StaticTask_t cdc_taskdef; + + +void led_blinky_cb(TimerHandle_t xTimer); +void usb_device_task(void* param); +void cdc_task(void* params); + +//--------------------------------------------------------------------+ +// Main +//--------------------------------------------------------------------+ + +int main(void) +{ + board_init(); + + // soft timer for blinky + blinky_tm = xTimerCreateStatic(NULL, pdMS_TO_TICKS(BLINK_NOT_MOUNTED), true, NULL, led_blinky_cb, &blinky_tmdef); + xTimerStart(blinky_tm, 0); + + // Create a task for tinyusb device stack + (void) xTaskCreateStatic( usb_device_task, "usbd", USBD_STACK_SIZE, NULL, configMAX_PRIORITIES-1, usb_device_stack, &usb_device_taskdef); + + // Create CDC task + (void) xTaskCreateStatic( cdc_task, "cdc", CDC_STACK_SZIE, NULL, configMAX_PRIORITIES-2, cdc_stack, &cdc_taskdef); + + // skip starting scheduler (and return) for ESP32-S2 or ESP32-S3 +#if CFG_TUSB_MCU != OPT_MCU_ESP32S2 && CFG_TUSB_MCU != OPT_MCU_ESP32S3 + vTaskStartScheduler(); +#endif + + return 0; +} + +#if CFG_TUSB_MCU == OPT_MCU_ESP32S2 || CFG_TUSB_MCU == OPT_MCU_ESP32S3 +void app_main(void) +{ + main(); +} +#endif + +// USB Device Driver task +// This top level thread process all usb events and invoke callbacks +void usb_device_task(void* param) +{ + (void) param; + + // This should be called after scheduler/kernel is started. + // Otherwise it could cause kernel issue since USB IRQ handler does use RTOS queue API. + tusb_init(); + + // RTOS forever loop + while (1) + { + // tinyusb device task + tud_task(); + } +} + +//--------------------------------------------------------------------+ +// Device callbacks +//--------------------------------------------------------------------+ + +// Invoked when device is mounted +void tud_mount_cb(void) +{ + xTimerChangePeriod(blinky_tm, pdMS_TO_TICKS(BLINK_MOUNTED), 0); +} + +// Invoked when device is unmounted +void tud_umount_cb(void) +{ + xTimerChangePeriod(blinky_tm, pdMS_TO_TICKS(BLINK_NOT_MOUNTED), 0); +} + +// Invoked when usb bus is suspended +// remote_wakeup_en : if host allow us to perform remote wakeup +// Within 7ms, device must draw an average of current less than 2.5 mA from bus +void tud_suspend_cb(bool remote_wakeup_en) +{ + (void) remote_wakeup_en; + xTimerChangePeriod(blinky_tm, pdMS_TO_TICKS(BLINK_SUSPENDED), 0); +} + +// Invoked when usb bus is resumed +void tud_resume_cb(void) +{ + xTimerChangePeriod(blinky_tm, pdMS_TO_TICKS(BLINK_MOUNTED), 0); +} + +//--------------------------------------------------------------------+ +// USB CDC +//--------------------------------------------------------------------+ +void cdc_task(void* params) +{ + (void) params; + + // RTOS forever loop + while ( 1 ) + { + // connected() check for DTR bit + // Most but not all terminal client set this when making connection + // if ( tud_cdc_connected() ) + { + // There are data available + if ( tud_cdc_available() ) + { + uint8_t buf[64]; + + // read and echo back + uint32_t count = tud_cdc_read(buf, sizeof(buf)); + (void) count; + + // Echo back + // Note: Skip echo by commenting out write() and write_flush() + // for throughput test e.g + // $ dd if=/dev/zero of=/dev/ttyACM0 count=10000 + tud_cdc_write(buf, count); + tud_cdc_write_flush(); + } + } + + // For ESP32-S2 this delay is essential to allow idle how to run and reset wdt + vTaskDelay(pdMS_TO_TICKS(10)); + } +} + +// Invoked when cdc when line state changed e.g connected/disconnected +void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts) +{ + (void) itf; + (void) rts; + + // TODO set some indicator + if ( dtr ) + { + // Terminal connected + }else + { + // Terminal disconnected + } +} + +// Invoked when CDC interface received data from host +void tud_cdc_rx_cb(uint8_t itf) +{ + (void) itf; +} + +//--------------------------------------------------------------------+ +// BLINKING TASK +//--------------------------------------------------------------------+ +void led_blinky_cb(TimerHandle_t xTimer) +{ + (void) xTimer; + static bool led_state = false; + + board_led_write(led_state); + led_state = 1 - led_state; // toggle +} |