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7.6 KiB

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
*
* 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 "shared-bindings/microcontroller/Pin.h"
#include "atmel_start_pins.h"
#include "hal/include/hal_gpio.h"
#include "samd/pins.h"
#include "supervisor/shared/rgb_led_status.h"
#ifdef MICROPY_HW_NEOPIXEL
bool neopixel_in_use;
#endif
#ifdef MICROPY_HW_APA102_MOSI
bool apa102_sck_in_use;
bool apa102_mosi_in_use;
#endif
#ifdef SPEAKER_ENABLE_PIN
bool speaker_enable_in_use;
#endif
#define PORT_COUNT (PORT_BITS / 32 + 1)
#ifdef SAMD51
#define SWD_MUX GPIO_PIN_FUNCTION_H
#endif
#ifdef SAMD21
#define SWD_MUX GPIO_PIN_FUNCTION_G
#endif
STATIC uint32_t never_reset_pins[PORT_COUNT];
void reset_all_pins(void) {
uint32_t pin_mask[PORT_COUNT] = PORT_OUT_IMPLEMENTED;
// Do not full reset USB lines.
pin_mask[0] &= ~(PORT_PA24 | PORT_PA25);
// Do not reset SWD when a debugger is present.
if (DSU->STATUSB.bit.DBGPRES == 1) {
pin_mask[0] &= ~(PORT_PA30 | PORT_PA31);
}
for (uint32_t i = 0; i < PORT_COUNT; i++) {
pin_mask[i] &= ~never_reset_pins[i];
}
gpio_set_port_direction(GPIO_PORTA, pin_mask[0] & ~MICROPY_PORT_A, GPIO_DIRECTION_OFF);
gpio_set_port_direction(GPIO_PORTB, pin_mask[1] & ~MICROPY_PORT_B, GPIO_DIRECTION_OFF);
#if PORT_BITS > 64
gpio_set_port_direction(GPIO_PORTC, pin_mask[2] & ~MICROPY_PORT_C, GPIO_DIRECTION_OFF);
#endif
#if PORT_BITS > 96
gpio_set_port_direction(GPIO_PORTD, pin_mask[3] & ~MICROPY_PORT_D, GPIO_DIRECTION_OFF);
#endif
// Configure SWD. SWDIO will be automatically switched on PA31 when a signal is input on
// SWCLK.
#ifdef SAMD51
gpio_set_pin_function(PIN_PA30, MUX_PA30H_CM4_SWCLK);
#endif
#ifdef SAMD21
gpio_set_pin_function(PIN_PA30, GPIO_PIN_FUNCTION_G);
gpio_set_pin_function(PIN_PA31, GPIO_PIN_FUNCTION_G);
#endif
#ifdef MICROPY_HW_NEOPIXEL
neopixel_in_use = false;
#endif
#ifdef MICROPY_HW_APA102_MOSI
apa102_sck_in_use = false;
apa102_mosi_in_use = false;
#endif
// After configuring SWD because it may be shared.
#ifdef SPEAKER_ENABLE_PIN
speaker_enable_in_use = false;
gpio_set_pin_function(SPEAKER_ENABLE_PIN->number, GPIO_PIN_FUNCTION_OFF);
gpio_set_pin_direction(SPEAKER_ENABLE_PIN->number, GPIO_DIRECTION_OUT);
gpio_set_pin_level(SPEAKER_ENABLE_PIN->number, false);
#endif
}
void never_reset_pin_number(uint8_t pin_number) {
never_reset_pins[GPIO_PORT(pin_number)] |= 1 << GPIO_PIN(pin_number);
}
void reset_pin_number(uint8_t pin_number) {
never_reset_pins[GPIO_PORT(pin_number)] &= ~(1 << GPIO_PIN(pin_number));
if (pin_number >= PORT_BITS) {
return;
}
#ifdef MICROPY_HW_NEOPIXEL
if (pin_number == MICROPY_HW_NEOPIXEL->number) {
neopixel_in_use = false;
rgb_led_status_init();
return;
}
#endif
#ifdef MICROPY_HW_APA102_MOSI
if (pin_number == MICROPY_HW_APA102_MOSI->number ||
pin_number == MICROPY_HW_APA102_SCK->number) {
apa102_mosi_in_use = apa102_mosi_in_use && pin_number != MICROPY_HW_APA102_MOSI->number;
apa102_sck_in_use = apa102_sck_in_use && pin_number != MICROPY_HW_APA102_SCK->number;
if (!apa102_sck_in_use && !apa102_mosi_in_use) {
rgb_led_status_init();
}
return;
}
#endif
if (pin_number == PIN_PA30
#ifdef SAMD51
) {
#endif
#ifdef SAMD21
|| pin_number == PIN_PA31) {
#endif
gpio_set_pin_function(pin_number, SWD_MUX);
} else {
gpio_set_pin_direction(pin_number, GPIO_DIRECTION_OFF);
gpio_set_pin_function(pin_number, GPIO_PIN_FUNCTION_OFF);
}
#ifdef SPEAKER_ENABLE_PIN
if (pin_number == SPEAKER_ENABLE_PIN->number) {
speaker_enable_in_use = false;
gpio_set_pin_function(pin_number, GPIO_PIN_FUNCTION_OFF);
gpio_set_pin_direction(SPEAKER_ENABLE_PIN->number, GPIO_DIRECTION_OUT);
gpio_set_pin_level(SPEAKER_ENABLE_PIN->number, false);
}
#endif
}
void common_hal_never_reset_pin(const mcu_pin_obj_t* pin) {
never_reset_pin_number(pin->number);
}
void common_hal_reset_pin(const mcu_pin_obj_t* pin) {
reset_pin_number(pin->number);
}
void claim_pin(const mcu_pin_obj_t* pin) {
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL) {
neopixel_in_use = true;
}
#endif
#ifdef MICROPY_HW_APA102_MOSI
if (pin == MICROPY_HW_APA102_MOSI) {
apa102_mosi_in_use = true;
}
if (pin == MICROPY_HW_APA102_SCK) {
apa102_sck_in_use = true;
}
#endif
#ifdef SPEAKER_ENABLE_PIN
if (pin == SPEAKER_ENABLE_PIN) {
speaker_enable_in_use = true;
}
#endif
}
bool pin_number_is_free(uint8_t pin_number) {
PortGroup *const port = &PORT->Group[(enum gpio_port)GPIO_PORT(pin_number)];
uint8_t pin_index = GPIO_PIN(pin_number);
volatile PORT_PINCFG_Type *state = &port->PINCFG[pin_index];
volatile PORT_PMUX_Type *pmux = &port->PMUX[pin_index / 2];
if (pin_number == PIN_PA30 || pin_number == PIN_PA31) {
if (DSU->STATUSB.bit.DBGPRES == 1) {
return false;
}
if (pin_number == PIN_PA30
#ifdef SAMD51
) {
#endif
#ifdef SAMD21
|| pin_number == PIN_PA31) {
#endif) {
return state->bit.PMUXEN == 1 && ((pmux->reg >> (4 * pin_index % 2)) & 0xf) == SWD_MUX;
}
}
return state->bit.PMUXEN == 0 && state->bit.INEN == 0 &&
state->bit.PULLEN == 0 && (port->DIR.reg & (1 << pin_index)) == 0;
}
bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t* pin) {
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL) {
// Special case for Metro M0 where the NeoPixel is also SWCLK
if (MICROPY_HW_NEOPIXEL == &pin_PA30 && DSU->STATUSB.bit.DBGPRES == 1) {
return false;
}
return !neopixel_in_use;
}
#endif
#ifdef MICROPY_HW_APA102_MOSI
if (pin == MICROPY_HW_APA102_MOSI) {
return !apa102_mosi_in_use;
}
if (pin == MICROPY_HW_APA102_SCK) {
return !apa102_sck_in_use;
}
#endif
#ifdef SPEAKER_ENABLE_PIN
if (pin == SPEAKER_ENABLE_PIN) {
return !speaker_enable_in_use;
}
#endif
return pin_number_is_free(pin->number);
}
uint8_t common_hal_mcu_pin_number(const mcu_pin_obj_t* pin) {
return pin->number;
}
void common_hal_mcu_pin_claim(const mcu_pin_obj_t* pin) {
return claim_pin(pin);
}
void common_hal_mcu_pin_reset_number(uint8_t pin_no) {
reset_pin_number(pin_no);
}