efffb62b36
Now this boot.py:
```py
for i in range(1000):
print(i)
```
creates a 512-byte boot_out.txt that ends
```
88
89
...
```
83 lines
2.6 KiB
C
83 lines
2.6 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) 2018 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 "supervisor/serial.h"
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#include "lib/oofatfs/ff.h"
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#include "py/mpconfig.h"
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#include "py/mpstate.h"
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#include "py/runtime.h"
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#include "py/stream.h"
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#include "supervisor/shared/status_leds.h"
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#if CIRCUITPY_WATCHDOG
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#include "shared-bindings/watchdog/__init__.h"
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#define WATCHDOG_EXCEPTION_CHECK() (MP_STATE_VM(mp_pending_exception) == &mp_watchdog_timeout_exception)
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#else
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#define WATCHDOG_EXCEPTION_CHECK() 0
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#endif
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int mp_hal_stdin_rx_chr(void) {
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for (;;) {
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#ifdef MICROPY_VM_HOOK_LOOP
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MICROPY_VM_HOOK_LOOP
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#endif
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mp_handle_pending(true);
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if (serial_bytes_available()) {
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toggle_rx_led();
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return serial_read();
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}
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}
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}
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void mp_hal_stdout_tx_strn(const char *str, size_t len) {
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toggle_tx_led();
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#ifdef CIRCUITPY_BOOT_OUTPUT_FILE
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if (boot_output != NULL) {
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// Ensure boot_out.txt is capped at 1 filesystem block and ends with a newline
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if (len + boot_output->len > 508) {
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vstr_add_str(boot_output, "...\n");
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boot_output = NULL;
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} else {
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vstr_add_strn(boot_output, str, len);
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}
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}
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#endif
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serial_write_substring(str, len);
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}
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uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags) {
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uintptr_t ret = 0;
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if ((poll_flags & MP_STREAM_POLL_RD) && serial_bytes_available()) {
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ret |= MP_STREAM_POLL_RD;
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}
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return ret;
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}
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