eacb7dbe58
The interrupt may have a higher priority than the serial output's (USB) interrupt and may never make room. This makes prints from interrupts (like the BLE event calls) best effort for what can be queued up. The rest of the output will be dropped.
156 lines
4.5 KiB
C
156 lines
4.5 KiB
C
/*
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* This file is part of the MicroPython 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) 2017 Scott Shawcroft 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 <string.h>
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#include "py/mpconfig.h"
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#include "supervisor/shared/cpu.h"
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#include "supervisor/shared/display.h"
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#include "shared-bindings/terminalio/Terminal.h"
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#include "supervisor/serial.h"
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#include "supervisor/usb.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "tusb.h"
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/*
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* Note: DEBUG_UART currently only works on STM32,
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* enabling on another platform will cause a crash.
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*/
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#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
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#include "shared-bindings/busio/UART.h"
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busio_uart_obj_t debug_uart;
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byte buf_array[64];
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#endif
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#if CIRCUITPY_USB_VENDOR
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bool tud_vendor_connected(void);
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#endif
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void serial_early_init(void) {
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#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
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debug_uart.base.type = &busio_uart_type;
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const mcu_pin_obj_t *rx = MP_OBJ_TO_PTR(DEBUG_UART_RX);
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const mcu_pin_obj_t *tx = MP_OBJ_TO_PTR(DEBUG_UART_TX);
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common_hal_busio_uart_construct(&debug_uart, tx, rx, NULL, NULL, NULL,
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false, 115200, 8, UART_PARITY_NONE, 1, 1.0f, 64,
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buf_array, true);
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common_hal_busio_uart_never_reset(&debug_uart);
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#endif
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}
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void serial_init(void) {
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usb_init();
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}
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bool serial_connected(void) {
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#if CIRCUITPY_USB_VENDOR
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if (tud_vendor_connected()) {
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return true;
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}
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#endif
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#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
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return true;
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#else
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return tud_cdc_connected();
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#endif
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}
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char serial_read(void) {
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#if CIRCUITPY_USB_VENDOR
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if (tud_vendor_connected() && tud_vendor_available() > 0) {
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char tiny_buffer;
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tud_vendor_read(&tiny_buffer, 1);
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return tiny_buffer;
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}
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#endif
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#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
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if (tud_cdc_connected() && tud_cdc_available() > 0) {
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return (char)tud_cdc_read_char();
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}
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int uart_errcode;
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char text;
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common_hal_busio_uart_read(&debug_uart, (uint8_t *)&text, 1, &uart_errcode);
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return text;
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#else
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return (char)tud_cdc_read_char();
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#endif
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}
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bool serial_bytes_available(void) {
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#if CIRCUITPY_USB_VENDOR
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if (tud_vendor_connected() && tud_vendor_available() > 0) {
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return true;
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}
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#endif
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#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
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return common_hal_busio_uart_rx_characters_available(&debug_uart) || (tud_cdc_available() > 0);
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#else
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return tud_cdc_available() > 0;
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#endif
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}
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void serial_write_substring(const char *text, uint32_t length) {
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if (length == 0) {
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return;
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}
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#if CIRCUITPY_TERMINALIO
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int errcode;
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common_hal_terminalio_terminal_write(&supervisor_terminal, (const uint8_t *)text, length, &errcode);
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#endif
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#if CIRCUITPY_USB_VENDOR
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if (tud_vendor_connected()) {
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tud_vendor_write(text, length);
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}
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#endif
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uint32_t count = 0;
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while (count < length && tud_cdc_connected()) {
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count += tud_cdc_write(text + count, length - count);
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// If we're in an interrupt, then don't wait for more room. Queue up what we can.
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if (cpu_interrupt_active()) {
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break;
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}
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usb_background();
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}
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#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
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int uart_errcode;
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common_hal_busio_uart_write(&debug_uart, (const uint8_t *)text, length, &uart_errcode);
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#endif
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}
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void serial_write(const char *text) {
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serial_write_substring(text, strlen(text));
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}
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