f46782dde9
This is an extremely minimal port to the NXP i.MX RT, in the style of the
SAMD port It's largely based on the TinyUSB mimxrt implementation, using
the NXP SDK. It currently supports the Teensy 4.0 board with a REPL over
the USB-VCP interface.
This commit also adds the NXP SDK submodule (also from TinyUSB) to
lib/nxp_driver.
Note: if you already have the tinyusb submodule initialized recursively you
will need to run the following as the tinyusb sub-submodules have been
rearranged (upstream):
git submodule deinit lib/tinyusb
rm -rf .git/modules/lib/tinyusb
git submodule update --init lib/tinyusb
104 lines
2.9 KiB
C
104 lines
2.9 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) 2019 Damien P. George
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* Copyright (c) 2020 Jim Mussared
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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 "py/runtime.h"
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#include "py/mphal.h"
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#include "tusb.h"
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#include CPU_HEADER_H
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#if MICROPY_KBD_EXCEPTION
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void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char) {
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(void)itf;
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(void)wanted_char;
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tud_cdc_read_char(); // discard interrupt char
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mp_keyboard_interrupt();
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}
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void mp_hal_set_interrupt_char(int c) {
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tud_cdc_set_wanted_char(c);
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}
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#endif
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void mp_hal_delay_ms(mp_uint_t ms) {
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ms += 1;
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uint32_t t0 = systick_ms;
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while (systick_ms - t0 < ms) {
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MICROPY_EVENT_POLL_HOOK
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}
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}
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void mp_hal_delay_us(mp_uint_t us) {
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uint32_t ms = us / 1000 + 1;
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uint32_t t0 = systick_ms;
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while (systick_ms - t0 < ms) {
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__WFI();
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}
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}
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int mp_hal_stdin_rx_chr(void) {
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for (;;) {
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// TODO
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// if (USARTx->USART.INTFLAG.bit.RXC) {
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// return USARTx->USART.DATA.bit.DATA;
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// }
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if (tud_cdc_connected() && tud_cdc_available()) {
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uint8_t buf[1];
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uint32_t count = tud_cdc_read(buf, sizeof(buf));
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if (count) {
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return buf[0];
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}
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}
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__WFI();
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}
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}
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void mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {
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if (tud_cdc_connected()) {
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for (size_t i = 0; i < len;) {
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uint32_t n = len - i;
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uint32_t n2 = tud_cdc_write(str + i, n);
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if (n2 < n) {
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while (!tud_cdc_write_flush()) {
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__WFI();
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}
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}
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i += n2;
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}
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while (!tud_cdc_write_flush()) {
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__WFI();
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}
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}
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// TODO
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// while (len--) {
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// while (!(USARTx->USART.INTFLAG.bit.DRE)) { }
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// USARTx->USART.DATA.bit.DATA = *str++;
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// }
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}
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