119 lines
4.2 KiB
C
119 lines
4.2 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/__init__.h"
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#include "common-hal/microcontroller/__init__.h"
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#include "common-hal/microcontroller/Pin.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "py/mphal.h"
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#include "eagle_soc.h"
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bool adc_in_use;
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bool gpio16_in_use;
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typedef struct {
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void (*func)(void *);
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void *data;
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} pin_intr_handler_t;
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static pin_intr_handler_t _pin_intr_handlers[GPIO_PIN_COUNT];
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void microcontroller_pin_call_intr_handlers(uint32_t status) {
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status &= (1 << GPIO_PIN_COUNT) - 1;
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for (int p = 0; status; ++p, status >>= 1) {
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if ((status & 1) && _pin_intr_handlers[p].func) {
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_pin_intr_handlers[p].func(_pin_intr_handlers[p].data);
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}
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}
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}
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void microcontroller_pin_register_intr_handler(uint8_t gpio_number, void (*func)(void *), void *data) {
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common_hal_mcu_disable_interrupts();
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_pin_intr_handlers[gpio_number] = (pin_intr_handler_t){ func, data };
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common_hal_mcu_enable_interrupts();
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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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if (pin == &pin_TOUT) {
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return !adc_in_use;
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}
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if (pin == &pin_XPD_DCDC) {
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return !gpio16_in_use;
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}
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if (pin->gpio_number == NO_GPIO) {
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return false;
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}
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return (READ_PERI_REG(pin->peripheral) &
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(PERIPHS_IO_MUX_FUNC<<PERIPHS_IO_MUX_FUNC_S)) == 0 &&
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(GPIO_REG_READ(GPIO_ENABLE_ADDRESS) & (1 << pin->gpio_number)) == 0 &&
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(READ_PERI_REG(pin->peripheral) & PERIPHS_IO_MUX_PULLUP) == 0;
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}
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void claim_pin(const mcu_pin_obj_t* pin) {
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if (pin == &pin_XPD_DCDC) {
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gpio16_in_use = true;
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}
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if (pin == &pin_TOUT) {
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adc_in_use = true;
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}
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}
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void reset_pin(const mcu_pin_obj_t* pin) {
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if (pin == &pin_XPD_DCDC) {
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// Set GPIO16 as input
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WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | 1); // mux configuration for XPD_DCDC and rtc_gpio0 connection
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WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1); //mux configuration for out enable
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WRITE_PERI_REG(RTC_GPIO_ENABLE, READ_PERI_REG(RTC_GPIO_ENABLE) & ~1); //out disable
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gpio16_in_use = false;
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}
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if (pin == &pin_TOUT) {
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adc_in_use = false;
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}
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}
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void reset_pins(void) {
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for (int i = 0; i < 16; i++) {
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// 5 is RXD, 6 is TXD
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if ((i > 4 && i < 13) || i == 12) {
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continue;
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}
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uint32_t peripheral = PERIPHS_IO_MUX + i * 4;
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PIN_FUNC_SELECT(peripheral, 0);
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PIN_PULLUP_DIS(peripheral);
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// Disable the pin.
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gpio_output_set(0x0, 0x0, 0x0, 1 << i);
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}
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// Set GPIO16 as input
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WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | 1); // mux configuration for XPD_DCDC and rtc_gpio0 connection
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WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1); //mux configuration for out enable
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WRITE_PERI_REG(RTC_GPIO_ENABLE, READ_PERI_REG(RTC_GPIO_ENABLE) & ~1); //out disable
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adc_in_use = false;
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gpio16_in_use = false;
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}
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