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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 hathach for Adafruit Industries
* Copyright (c) 2019 Lucian Copeland for Adafruit Industries
*
* 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 "supervisor/usb.h"
#include "supervisor/esp_port.h"
#include "lib/utils/interrupt_char.h"
#include "lib/mp-readline/readline.h"
#include "components/soc/soc/esp32s2/include/soc/usb_periph.h"
#include "components/driver/include/driver/periph_ctrl.h"
#include "components/driver/include/driver/gpio.h"
#include "components/esp_rom/include/esp32s2/rom/gpio.h"
#include "components/soc/src/esp32s2/include/hal/gpio_ll.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "hal/usb_hal.h"
#include "tusb.h"
#ifdef 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;
// USB Device Driver task
// This top level thread process all usb events and invoke callbacks
void usb_device_task(void *param) {
(void)param;
// RTOS forever loop
while (1) {
// tinyusb device task
if (tusb_inited()) {
tud_task();
tud_cdc_write_flush();
}
vTaskDelay(1);
}
}
static void configure_pins(usb_hal_context_t *usb) {
/* usb_periph_iopins currently configures USB_OTG as USB Device.
* Introduce additional parameters in usb_hal_context_t when adding support
* for USB Host.
*/
for (const usb_iopin_dsc_t *iopin = usb_periph_iopins; iopin->pin != -1; ++iopin) {
if ((usb->use_external_phy) || (iopin->ext_phy_only == 0)) {
gpio_pad_select_gpio(iopin->pin);
if (iopin->is_output) {
gpio_matrix_out(iopin->pin, iopin->func, false, false);
} else {
gpio_matrix_in(iopin->pin, iopin->func, false);
gpio_pad_input_enable(iopin->pin);
}
gpio_pad_unhold(iopin->pin);
}
}
if (!usb->use_external_phy) {
gpio_set_drive_capability(USBPHY_DP_NUM, GPIO_DRIVE_CAP_3);
gpio_set_drive_capability(USBPHY_DP_NUM, GPIO_DRIVE_CAP_3);
}
}
void init_usb_hardware(void) {
periph_module_reset(PERIPH_USB_MODULE);
periph_module_enable(PERIPH_USB_MODULE);
usb_hal_context_t hal = {
.use_external_phy = false // use built-in PHY
};
usb_hal_init(&hal);
configure_pins(&hal);
(void)xTaskCreateStatic(usb_device_task,
"usbd",
USBD_STACK_SIZE,
NULL,
5,
usb_device_stack,
&usb_device_taskdef);
}
/**
* Callback invoked when received an "wanted" char.
* @param itf Interface index (for multiple cdc interfaces)
* @param wanted_char The wanted char (set previously)
*/
void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char) {
(void)itf; // not used
// Workaround for using lib/utils/interrupt_char.c
// Compare mp_interrupt_char with wanted_char and ignore if not matched
if (mp_interrupt_char == wanted_char) {
tud_cdc_read_flush(); // flush read fifo
mp_keyboard_interrupt();
// CircuitPython's VM is run in a separate FreeRTOS task from TinyUSB.
// So, we must notify the other task when a CTRL-C is received.
xTaskNotifyGive(circuitpython_task);
}
}
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