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/*
* 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 "asf/sam0/drivers/port/port.h"
#include "rgb_led_status.h"
#include "samd21_pins.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
void reset_all_pins(void) {
struct system_pinmux_config config;
system_pinmux_get_config_defaults(&config);
config.powersave = true;
uint32_t pin_mask[2] = PORT_OUT_IMPLEMENTED;
// Do not full reset USB or SWD lines.
pin_mask[0] &= ~(PORT_PA24 | PORT_PA25 | PORT_PA30 | PORT_PA31);
system_pinmux_group_set_config(&(PORT->Group[0]), pin_mask[0] & ~MICROPY_PORT_A, &config);
system_pinmux_group_set_config(&(PORT->Group[1]), pin_mask[1] & ~MICROPY_PORT_B, &config);
// Configure SWD
system_pinmux_get_config_defaults(&config);
config.mux_position = 0x6;
system_pinmux_group_set_config(&(PORT->Group[0]), PORT_PA30 | PORT_PA31, &config);
#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;
struct port_config pin_conf;
port_get_config_defaults(&pin_conf);
pin_conf.direction = PORT_PIN_DIR_OUTPUT;
port_pin_set_config(SPEAKER_ENABLE_PIN->pin, &pin_conf);
port_pin_set_output_level(SPEAKER_ENABLE_PIN->pin, false);
#endif
}
void reset_pin(uint8_t pin) {
if (pin >= PORT_BITS) {
return;
}
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL->pin) {
neopixel_in_use = false;
rgb_led_status_init();
return;
}
#endif
#ifdef MICROPY_HW_APA102_MOSI
if (pin == MICROPY_HW_APA102_MOSI->pin ||
pin == MICROPY_HW_APA102_SCK->pin) {
apa102_mosi_in_use = apa102_mosi_in_use && pin != MICROPY_HW_APA102_MOSI->pin;
apa102_sck_in_use = apa102_sck_in_use && pin != MICROPY_HW_APA102_SCK->pin;
if (!apa102_sck_in_use && !apa102_mosi_in_use) {
rgb_led_status_init();
}
return;
}
#endif
struct system_pinmux_config config;
system_pinmux_get_config_defaults(&config);
if (pin == PIN_PA30 || pin == PIN_PA31) {
config.mux_position = 0x6;
} else {
config.powersave = true;
}
system_pinmux_pin_set_config(pin, &config);
#ifdef SPEAKER_ENABLE_PIN
if (pin == SPEAKER_ENABLE_PIN->pin) {
speaker_enable_in_use = false;
struct port_config pin_conf;
port_get_config_defaults(&pin_conf);
pin_conf.direction = PORT_PIN_DIR_OUTPUT;
port_pin_set_config(SPEAKER_ENABLE_PIN->pin, &pin_conf);
port_pin_set_output_level(SPEAKER_ENABLE_PIN->pin, false);
}
#endif
}
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 common_hal_mcu_pin_is_free(const mcu_pin_obj_t* pin) {
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL) {
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
PortGroup *const port = system_pinmux_get_group_from_gpio_pin(pin->pin);
uint32_t pin_index = (pin->pin);
volatile PORT_PINCFG_Type *state = &port->PINCFG[pin_index];
volatile PORT_PMUX_Type *pmux = &port->PMUX[pin_index / 2];
if (pin->pin == PIN_PA30 || pin->pin == PIN_PA31) {
return state->bit.PMUXEN == 1 && ((pmux->reg >> (4 * pin_index % 2)) & 0xf) == 0x6;
}
return state->bit.PMUXEN == 0 && state->bit.INEN == 0 &&
state->bit.PULLEN == 0 && (port->DIR.reg & (1 << pin_index)) == 0;
}
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