circuitpython/ports/samd/mphalport.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Damien P. George
* Copyright (c) 2022 Robert Hammelrath
*
* 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 "py/runtime.h"
#include "py/mphal.h"
#include "py/stream.h"
#include "shared/runtime/interrupt_char.h"
#include "extmod/misc.h"
#include "samd_soc.h"
#include "tusb.h"
#if MICROPY_KBD_EXCEPTION
int mp_interrupt_char = -1;
void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char) {
(void)itf;
(void)wanted_char;
tud_cdc_read_char(); // discard interrupt char
mp_sched_keyboard_interrupt();
}
void mp_hal_set_interrupt_char(int c) {
mp_interrupt_char = c;
tud_cdc_set_wanted_char(c);
}
#endif
void mp_hal_set_pin_mux(mp_hal_pin_obj_t pin, uint8_t mux) {
int pin_grp = pin / 32;
int port_grp = (pin % 32) / 2;
PORT->Group[pin_grp].PINCFG[pin % 32].bit.PMUXEN = 1; // Enable Mux
if (pin & 1) {
PORT->Group[pin_grp].PMUX[port_grp].bit.PMUXO = mux;
} else {
PORT->Group[pin_grp].PMUX[port_grp].bit.PMUXE = mux;
}
}
void mp_hal_clr_pin_mux(mp_hal_pin_obj_t pin) {
int pin_grp = pin / 32;
PORT->Group[pin_grp].PINCFG[pin % 32].bit.PMUXEN = 0; // Disable Mux
}
void mp_hal_delay_ms(mp_uint_t ms) {
if (ms > 10) {
uint32_t t0 = systick_ms;
while (systick_ms - t0 < ms) {
MICROPY_EVENT_POLL_HOOK
}
} else {
mp_hal_delay_us(ms * 1000);
}
}
void mp_hal_delay_us(mp_uint_t us) {
if (us > 0) {
uint32_t start = mp_hal_ticks_us();
#if defined(MCU_SAMD21)
// SAMD21 counter has effective 32 bit width
while ((mp_hal_ticks_us() - start) < us) {
}
#elif defined(MCU_SAMD51)
// SAMD51 counter has effective 29 bit width
while (((mp_hal_ticks_us() - start) & (MICROPY_PY_UTIME_TICKS_PERIOD - 1)) < us) {
}
#endif
}
}
uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags) {
uintptr_t ret = 0;
if (tud_cdc_connected() && tud_cdc_available()) {
ret |= MP_STREAM_POLL_RD;
}
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#if MICROPY_PY_OS_DUPTERM
ret |= mp_uos_dupterm_poll(poll_flags);
#endif
return ret;
}
int mp_hal_stdin_rx_chr(void) {
for (;;) {
if (tud_cdc_connected() && tud_cdc_available()) {
uint8_t buf[1];
uint32_t count = tud_cdc_read(buf, sizeof(buf));
if (count) {
return buf[0];
}
}
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#if MICROPY_PY_OS_DUPTERM
int dupterm_c = mp_uos_dupterm_rx_chr();
if (dupterm_c >= 0) {
return dupterm_c;
}
#endif
MICROPY_EVENT_POLL_HOOK
}
}
void mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {
if (tud_cdc_connected()) {
for (size_t i = 0; i < len;) {
uint32_t n = len - i;
if (n > CFG_TUD_CDC_EP_BUFSIZE) {
n = CFG_TUD_CDC_EP_BUFSIZE;
}
while (n > tud_cdc_write_available()) {
MICROPY_EVENT_POLL_HOOK
}
uint32_t n2 = tud_cdc_write(str + i, n);
tud_cdc_write_flush();
i += n2;
}
}
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#if MICROPY_PY_OS_DUPTERM
mp_uos_dupterm_tx_strn(str, len);
#endif
}