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https://github.com/WeActStudio/ArduinoCore-AT32F4.git
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ZYQ-FEIYUE
294
cores/arduino/libcore/Arduino.c
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294
cores/arduino/libcore/Arduino.c
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/*
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* MIT License
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* Copyright (c) 2017 - 2022 _VIFEXTech
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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 all
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* 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 THE
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* SOFTWARE.
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*/
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#include "Arduino.h"
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/**
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* @brief 配置引脚输入输出模式
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* @param pin: 引脚编号
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* @param PinMode_x: 模式
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* @retval 无
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*/
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void pinMode(uint8_t pin, PinMode_TypeDef mode)
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{
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if(!IS_PIN(pin))
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{
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return;
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}
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if(mode == INPUT_ANALOG_DMA)
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{
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if(!IS_ADC_PIN(pin))
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{
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return;
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}
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pinMode(pin, INPUT_ANALOG);
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ADC_DMA_Register(PIN_MAP[pin].ADC_Channel);
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}
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else if(mode == PWM)
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{
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PWM_Init(pin, PWM_RESOLUTION_DEFAULT, PWM_FREQUENCY_DEFAULT);
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}
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else
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{
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GPIOx_Init(
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PIN_MAP[pin].GPIOx,
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PIN_MAP[pin].GPIO_Pin_x,
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mode,
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GPIO_DRIVE_DEFAULT
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);
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}
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}
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/**
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* @brief 将数字HIGH(1)或LOW(0)值写入数字引脚
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* @param pin:引脚编号
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* @param value: 写入值
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* @retval 无
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*/
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void digitalWrite(uint8_t pin, uint8_t value)
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{
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if(!IS_PIN(pin))
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{
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return;
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}
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value ? digitalWrite_HIGH(pin) : digitalWrite_LOW(pin);
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}
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/**
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* @brief 读取引脚电平
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* @param pin: 引脚编号
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* @retval 引脚电平
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*/
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uint8_t digitalRead(uint8_t pin)
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{
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if(!IS_PIN(pin))
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{
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return 0;
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}
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return digitalRead_FAST(pin);
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}
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/**
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* @brief 将模拟值(PWM占空比)写入引脚
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* @param pin: 引脚编号
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* @param value: PWM占空比
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* @retval 无
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*/
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void analogWrite(uint8_t pin, uint16_t value)
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{
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if(!IS_PWM_PIN(pin))
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{
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return;
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}
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PWM_Write(pin, value);
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}
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/**
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* @brief 从指定的模拟引脚读取值
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* @param pin: 引脚编号
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* @retval ADC值：0~4095
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*/
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uint16_t analogRead(uint8_t pin)
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{
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if(!IS_ADC_PIN(pin))
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{
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return 0;
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}
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return ADCx_GetValue(PIN_MAP[pin].ADCx, PIN_MAP[pin].ADC_Channel);
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}
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/**
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* @brief 从指定的引脚读取值(DMA方式)
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* @param pin: 引脚编号
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* @retval ADC值：0~4095
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*/
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uint16_t analogRead_DMA(uint8_t pin)
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{
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if(!IS_ADC_PIN(pin))
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{
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return 0;
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}
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return ADC_DMA_GetValue(PIN_MAP[pin].ADC_Channel);
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}
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/**
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* @brief 一次移出一个字节的数据，从最左端或最小(最右边)开始
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* @param dataPin: 输出每个位的 pin
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* @param clockPin: 将 dataPin 设置为正确值后要切换的 pin (int)
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* @param bitOrder: MSBFIRST / LSBFIRST
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* @param value: 要移出的数据(字节)
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* @retval 无
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*/
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void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t value)
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{
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uint8_t i;
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if(!(IS_PIN(dataPin) && IS_PIN(clockPin)))
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{
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return;
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}
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digitalWrite_LOW(clockPin);
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for (i = 0; i < 8; i++)
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{
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int bit = bitOrder == LSBFIRST ? i : (7 - i);
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digitalWrite(dataPin, (value >> bit) & 0x1);
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togglePin(clockPin);
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togglePin(clockPin);
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}
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}
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/**
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* @brief 一次将一个字节的数据移位，从最左端或最小 (最右边) 开始
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* @param dataPin: 输入每个位的 pin
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* @param clockPin: 要切换到的 pin 信号从dataPin读取
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* @param bitOrder: MSBFIRST/LSBFIRST
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* @retval 读取的值 (字节)
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*/
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uint32_t shiftIn(uint8_t dataPin, uint8_t clockPin, uint32_t bitOrder)
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{
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uint8_t value = 0;
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uint8_t i;
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if(!(IS_PIN(dataPin) && IS_PIN(clockPin)))
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{
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return 0;
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}
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for (i = 0; i < 8; ++i)
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{
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digitalWrite_HIGH(clockPin);
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if (bitOrder == LSBFIRST )
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{
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value |= digitalRead(dataPin) << i;
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}
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else
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{
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value |= digitalRead(dataPin) << (7 - i);
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}
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digitalWrite_LOW(clockPin);
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}
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return value;
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}
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/**
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* @brief 在引脚上读取脉冲
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* @param pin: 要读取脉冲的引脚编号
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* @param value: 脉冲类型:高或低
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* @param timeout: 等待脉冲开始的微秒数
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* @retval 脉冲的长度(以微秒计)或0, 如果没有脉冲在超时之前开始
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*/
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uint32_t pulseIn(uint32_t pin, uint32_t state, uint32_t timeout)
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{
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// cache the IDR address and bit of the pin in order to speed up the
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// pulse width measuring loop and achieve finer resolution. calling
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// digitalRead() instead yields much coarser resolution.
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volatile uint32_t *idr = portInputRegister(digitalPinToPort(pin));
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const uint32_t bit = digitalPinToBitMask(pin);
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const uint32_t stateMask = (state ? bit : 0);
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uint32_t width = 0; // keep initialization out of time critical area
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// convert the timeout from microseconds to a number of times through
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// the initial loop; it takes 16 clock cycles per iteration.
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uint32_t numloops = 0;
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uint32_t maxloops = timeout * ( F_CPU / 16000000);
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volatile uint32_t dummyWidth = 0;
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if(!IS_PIN(pin))
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return 0;
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// wait for any previous pulse to end
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while ((*idr & bit) == stateMask)
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{
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if (numloops++ == maxloops)
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{
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return 0;
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}
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dummyWidth++;
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}
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// wait for the pulse to start
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while ((*idr & bit) != stateMask)
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{
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if (numloops++ == maxloops)
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{
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return 0;
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}
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dummyWidth++;
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}
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// wait for the pulse to stop
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while ((*idr & bit) == stateMask)
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{
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if (numloops++ == maxloops)
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{
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return 0;
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}
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width++;
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}
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// Excluding time taking up by the interrupts, it needs 16 clock cycles to look through the last while loop
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// 5 is added as a fiddle factor to correct for interrupts etc. But ultimately this would only be accurate if it was done ona hardware timer
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return (uint32_t)( ( (unsigned long long)(width + 5) * (unsigned long long) 16000000.0) / (unsigned long long)F_CPU );
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}
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/**
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* @brief 将一个数字(整形)从一个范围重新映射到另一个区域
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* @param x: 要映射的数字
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* @param in_min: 值的当前范围的下界
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* @param in_max: 值的当前范围的上界
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* @param out_min: 值的目标范围的下界
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* @param out_max: 值目标范围的上界
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* @retval 映射的值(long)
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*/
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long map(long x, long in_min, long in_max, long out_min, long out_max)
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{
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return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
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}
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/**
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* @brief 将一个数字(浮点型)从一个范围重新映射到另一个区域
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* @param x: 要映射的数字
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* @param in_min: 值的当前范围的下界
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* @param in_max: 值的当前范围的上界
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* @param out_min: 值的目标范围的下界
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* @param out_max: 值目标范围的上界
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* @retval 映射的值(double)
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*/
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float fmap(float x, float in_min, float in_max, float out_min, float out_max)
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{
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return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
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}
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void yield(void)
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{
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}
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