9d91111b1b
This started while adding USB MIDI support (and descriptor support is in this change.) When seeing that I'd have to implement the MIDI class logic twice, once for atmel-samd and once for nrf, I decided to refactor the USB stack so its shared across ports. This has led to a number of changes that remove items from the ports folder and move them into supervisor. Furthermore, we had external SPI flash support for nrf pending so I factored out the connection between the usb stack and the flash API as well. This PR also includes the QSPI support for nRF.
141 lines
4.3 KiB
C
141 lines
4.3 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 hathach for Adafruit Industries
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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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#include "tick.h"
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#include "shared-bindings/microcontroller/Processor.h"
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#include "supervisor/port.h"
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#include "supervisor/usb.h"
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#include "lib/utils/interrupt_char.h"
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#include "lib/mp-readline/readline.h"
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#include "tusb.h"
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// Serial number as hex characters. This writes directly to the USB
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// descriptor.
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extern uint16_t usb_serial_number[1 + COMMON_HAL_MCU_PROCESSOR_UID_LENGTH * 2];
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void load_serial_number(void) {
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// create serial number based on device unique id
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uint8_t raw_id[COMMON_HAL_MCU_PROCESSOR_UID_LENGTH];
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common_hal_mcu_processor_get_uid(raw_id);
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const char nibble_to_hex[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
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'A', 'B', 'C', 'D', 'E', 'F'};
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for (int i = 0; i < COMMON_HAL_MCU_PROCESSOR_UID_LENGTH; i++) {
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for (int j = 0; j < 2; j++) {
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uint8_t nibble = (raw_id[i] >> (j * 4)) & 0xf;
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// Strings are UTF-16-LE encoded.
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usb_serial_number[1 + i * 2 + j] = nibble_to_hex[nibble];
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}
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}
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}
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bool _usb_enabled = false;
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bool usb_enabled(void) {
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return _usb_enabled;
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}
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void usb_init(void) {
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init_usb_hardware();
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load_serial_number();
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tusb_init();
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_usb_enabled = true;
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#if MICROPY_KBD_EXCEPTION
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// Set Ctrl+C as wanted char, tud_cdc_rx_wanted_cb() callback will be invoked when Ctrl+C is received
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// This callback always got invoked regardless of mp_interrupt_char value since we only set it once here
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tud_cdc_set_wanted_char(CHAR_CTRL_C);
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#endif
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}
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void usb_background(void) {
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if (usb_enabled()) {
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tusb_task();
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tud_cdc_write_flush();
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}
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}
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//--------------------------------------------------------------------+
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// tinyusb 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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}
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// Invoked when device is unmounted
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void tud_umount_cb(void) {
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}
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uint32_t tusb_hal_millis(void) {
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uint64_t ms;
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uint32_t us;
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current_tick(&ms, &us);
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return (uint32_t) ms;
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}
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// Invoked when cdc when line state changed e.g connected/disconnected
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// Use to reset to DFU when disconnect with 1200 bps
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void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts) {
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(void) itf; // interface ID, not used
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// DTR = false is counted as disconnected
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if ( !dtr )
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{
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cdc_line_coding_t coding;
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tud_cdc_get_line_coding(&coding);
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if ( coding.bit_rate == 1200 )
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{
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reset_to_bootloader();
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}
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}
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}
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#if MICROPY_KBD_EXCEPTION
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/**
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* Callback invoked when received an "wanted" char.
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* @param itf Interface index (for multiple cdc interfaces)
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* @param wanted_char The wanted char (set previously)
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*/
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void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char)
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{
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(void) itf; // not used
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// Workaround for using lib/utils/interrupt_char.c
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// Compare mp_interrupt_char with wanted_char and ignore if not matched
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if (mp_interrupt_char == wanted_char) {
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tud_cdc_read_flush(); // flush read fifo
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mp_keyboard_interrupt();
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}
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}
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#endif
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