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Diffstat (limited to 'esp8266/esponewire.c')
-rw-r--r-- | esp8266/esponewire.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/esp8266/esponewire.c b/esp8266/esponewire.c deleted file mode 100644 index 22bb45b158..0000000000 --- a/esp8266/esponewire.c +++ /dev/null @@ -1,99 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2015-2016 Damien P. George - * - * 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 <stdint.h> - -#include "etshal.h" -#include "user_interface.h" -#include "modmachine.h" -#include "esponewire.h" - -#define TIMING_RESET1 (0) -#define TIMING_RESET2 (1) -#define TIMING_RESET3 (2) -#define TIMING_READ1 (3) -#define TIMING_READ2 (4) -#define TIMING_READ3 (5) -#define TIMING_WRITE1 (6) -#define TIMING_WRITE2 (7) -#define TIMING_WRITE3 (8) - -uint16_t esp_onewire_timings[9] = {480, 40, 420, 5, 5, 40, 10, 50, 10}; - -static uint32_t disable_irq(void) { - ets_intr_lock(); - return 0; -} - -static void enable_irq(uint32_t i) { - ets_intr_unlock(); -} - -static void mp_hal_delay_us_no_irq(uint32_t us) { - uint32_t start = system_get_time(); - while (system_get_time() - start < us) { - } -} - -#define DELAY_US mp_hal_delay_us_no_irq - -int esp_onewire_reset(uint pin) { - pin_set(pin, 0); - DELAY_US(esp_onewire_timings[TIMING_RESET1]); - uint32_t i = disable_irq(); - pin_set(pin, 1); - DELAY_US(esp_onewire_timings[TIMING_RESET2]); - int status = !pin_get(pin); - enable_irq(i); - DELAY_US(esp_onewire_timings[TIMING_RESET3]); - return status; -} - -int esp_onewire_readbit(uint pin) { - pin_set(pin, 1); - uint32_t i = disable_irq(); - pin_set(pin, 0); - DELAY_US(esp_onewire_timings[TIMING_READ1]); - pin_set(pin, 1); - DELAY_US(esp_onewire_timings[TIMING_READ2]); - int value = pin_get(pin); - enable_irq(i); - DELAY_US(esp_onewire_timings[TIMING_READ3]); - return value; -} - -void esp_onewire_writebit(uint pin, int value) { - uint32_t i = disable_irq(); - pin_set(pin, 0); - DELAY_US(esp_onewire_timings[TIMING_WRITE1]); - if (value) { - pin_set(pin, 1); - } - DELAY_US(esp_onewire_timings[TIMING_WRITE2]); - pin_set(pin, 1); - DELAY_US(esp_onewire_timings[TIMING_WRITE3]); - enable_irq(i); -} |