235 lines
7.2 KiB
C
235 lines
7.2 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) 2016 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 "shared-bindings/microcontroller/Pin.h"
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#include "atmel_start_pins.h"
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#include "hal/include/hal_gpio.h"
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#include "samd/pins.h"
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#include "supervisor/shared/rgb_led_status.h"
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#ifdef MICROPY_HW_NEOPIXEL
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bool neopixel_in_use;
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#endif
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#ifdef MICROPY_HW_APA102_MOSI
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bool apa102_sck_in_use;
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bool apa102_mosi_in_use;
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#endif
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#ifdef SPEAKER_ENABLE_PIN
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bool speaker_enable_in_use;
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#endif
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#define PORT_COUNT (PORT_BITS / 32 + 1)
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#ifdef SAMD51
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#define SWD_MUX GPIO_PIN_FUNCTION_H
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#endif
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#ifdef SAMD21
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#define SWD_MUX GPIO_PIN_FUNCTION_G
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#endif
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STATIC uint32_t never_reset_pins[PORT_COUNT];
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void reset_all_pins(void) {
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uint32_t pin_mask[PORT_COUNT] = PORT_OUT_IMPLEMENTED;
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// Do not full reset USB lines.
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pin_mask[0] &= ~(PORT_PA24 | PORT_PA25);
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// Do not reset SWD when a debugger is present.
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if (DSU->STATUSB.bit.DBGPRES == 1) {
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pin_mask[0] &= ~(PORT_PA30 | PORT_PA31);
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}
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for (uint32_t i = 0; i < PORT_COUNT; i++) {
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pin_mask[i] &= ~never_reset_pins[i];
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}
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gpio_set_port_direction(GPIO_PORTA, pin_mask[0] & ~MICROPY_PORT_A, GPIO_DIRECTION_OFF);
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gpio_set_port_direction(GPIO_PORTB, pin_mask[1] & ~MICROPY_PORT_B, GPIO_DIRECTION_OFF);
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#if PORT_BITS > 64
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gpio_set_port_direction(GPIO_PORTC, pin_mask[2] & ~MICROPY_PORT_C, GPIO_DIRECTION_OFF);
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#endif
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#if PORT_BITS > 96
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gpio_set_port_direction(GPIO_PORTD, pin_mask[3] & ~MICROPY_PORT_D, GPIO_DIRECTION_OFF);
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#endif
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// Configure SWD. SWDIO will be automatically switched on PA31 when a signal is input on
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// SWCLK.
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#ifdef SAMD51
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gpio_set_pin_function(PIN_PA30, MUX_PA30H_CM4_SWCLK);
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#endif
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#ifdef SAMD21
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gpio_set_pin_function(PIN_PA30, GPIO_PIN_FUNCTION_G);
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gpio_set_pin_function(PIN_PA31, GPIO_PIN_FUNCTION_G);
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#endif
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#ifdef MICROPY_HW_NEOPIXEL
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neopixel_in_use = false;
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#endif
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#ifdef MICROPY_HW_APA102_MOSI
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apa102_sck_in_use = false;
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apa102_mosi_in_use = false;
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#endif
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// After configuring SWD because it may be shared.
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#ifdef SPEAKER_ENABLE_PIN
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speaker_enable_in_use = false;
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gpio_set_pin_function(SPEAKER_ENABLE_PIN->number, GPIO_PIN_FUNCTION_OFF);
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gpio_set_pin_direction(SPEAKER_ENABLE_PIN->number, GPIO_DIRECTION_OUT);
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gpio_set_pin_level(SPEAKER_ENABLE_PIN->number, false);
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#endif
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}
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void never_reset_pin_number(uint8_t pin_number) {
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never_reset_pins[GPIO_PORT(pin_number)] |= 1 << GPIO_PIN(pin_number);
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}
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void reset_pin_number(uint8_t pin_number) {
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never_reset_pins[GPIO_PORT(pin_number)] &= ~(1 << GPIO_PIN(pin_number));
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if (pin_number >= PORT_BITS) {
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return;
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}
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#ifdef MICROPY_HW_NEOPIXEL
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if (pin_number == MICROPY_HW_NEOPIXEL->number) {
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neopixel_in_use = false;
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rgb_led_status_init();
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return;
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}
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#endif
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#ifdef MICROPY_HW_APA102_MOSI
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if (pin_number == MICROPY_HW_APA102_MOSI->number ||
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pin_number == MICROPY_HW_APA102_SCK->number) {
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apa102_mosi_in_use = apa102_mosi_in_use && pin_number != MICROPY_HW_APA102_MOSI->number;
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apa102_sck_in_use = apa102_sck_in_use && pin_number != MICROPY_HW_APA102_SCK->number;
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if (!apa102_sck_in_use && !apa102_mosi_in_use) {
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rgb_led_status_init();
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}
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return;
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}
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#endif
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if (pin_number == PIN_PA30
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#ifdef SAMD51
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) {
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#endif
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#ifdef SAMD21
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|| pin_number == PIN_PA31) {
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#endif
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gpio_set_pin_function(pin_number, SWD_MUX);
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} else {
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gpio_set_pin_direction(pin_number, GPIO_DIRECTION_OFF);
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gpio_set_pin_function(pin_number, GPIO_PIN_FUNCTION_OFF);
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}
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#ifdef SPEAKER_ENABLE_PIN
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if (pin_number == SPEAKER_ENABLE_PIN->number) {
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speaker_enable_in_use = false;
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gpio_set_pin_function(pin_number, GPIO_PIN_FUNCTION_OFF);
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gpio_set_pin_direction(SPEAKER_ENABLE_PIN->number, GPIO_DIRECTION_OUT);
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gpio_set_pin_level(SPEAKER_ENABLE_PIN->number, false);
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}
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#endif
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}
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void claim_pin(const mcu_pin_obj_t* pin) {
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#ifdef MICROPY_HW_NEOPIXEL
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if (pin == MICROPY_HW_NEOPIXEL) {
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neopixel_in_use = true;
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}
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#endif
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#ifdef MICROPY_HW_APA102_MOSI
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if (pin == MICROPY_HW_APA102_MOSI) {
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apa102_mosi_in_use = true;
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}
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if (pin == MICROPY_HW_APA102_SCK) {
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apa102_sck_in_use = true;
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}
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#endif
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#ifdef SPEAKER_ENABLE_PIN
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if (pin == SPEAKER_ENABLE_PIN) {
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speaker_enable_in_use = true;
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}
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#endif
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}
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bool pin_number_is_free(uint8_t pin_number) {
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PortGroup *const port = &PORT->Group[(enum gpio_port)GPIO_PORT(pin_number)];
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uint8_t pin_index = GPIO_PIN(pin_number);
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volatile PORT_PINCFG_Type *state = &port->PINCFG[pin_index];
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volatile PORT_PMUX_Type *pmux = &port->PMUX[pin_index / 2];
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if (pin_number == PIN_PA30 || pin_number == PIN_PA31) {
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if (DSU->STATUSB.bit.DBGPRES == 1) {
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return false;
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}
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if (pin_number == PIN_PA30
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#ifdef SAMD51
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) {
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#endif
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#ifdef SAMD21
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|| pin_number == PIN_PA31) {
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#endif) {
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return state->bit.PMUXEN == 1 && ((pmux->reg >> (4 * pin_index % 2)) & 0xf) == SWD_MUX;
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}
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}
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return state->bit.PMUXEN == 0 && state->bit.INEN == 0 &&
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state->bit.PULLEN == 0 && (port->DIR.reg & (1 << pin_index)) == 0;
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}
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bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t* pin) {
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#ifdef MICROPY_HW_NEOPIXEL
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if (pin == MICROPY_HW_NEOPIXEL) {
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// Special case for Metro M0 where the NeoPixel is also SWCLK
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if (MICROPY_HW_NEOPIXEL == &pin_PA30 && DSU->STATUSB.bit.DBGPRES == 1) {
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return false;
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}
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return !neopixel_in_use;
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}
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#endif
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#ifdef MICROPY_HW_APA102_MOSI
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if (pin == MICROPY_HW_APA102_MOSI) {
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return !apa102_mosi_in_use;
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}
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if (pin == MICROPY_HW_APA102_SCK) {
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return !apa102_sck_in_use;
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}
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#endif
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#ifdef SPEAKER_ENABLE_PIN
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if (pin == SPEAKER_ENABLE_PIN) {
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return !speaker_enable_in_use;
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}
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#endif
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return pin_number_is_free(pin->number);
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}
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