298 lines
7.2 KiB
C++
298 lines
7.2 KiB
C++
#include "Kernel\Sys.h"
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#include "Kernel\TTime.h"
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#include "IR.h"
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/*
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Timer2 CH2 通道
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DMA1 Channel3 通道
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*/
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IR::IR(Pwm * pwm)
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{
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_Pwm = pwm;
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}
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bool IR::Open()
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{
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return true;
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}
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bool IR::Close()
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{
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return true;
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}
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typedef enum
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{
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WaitRev,
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Rev,
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RevOver,
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Sending,
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SendOver,
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}IRStat;
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IRStat Stat;
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ushort * SendP = nullptr;
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ushort SendIndex;
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ushort SendBufLen;
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bool ErrorIRQ;
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bool IR::Send(const Buffer& bs)
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{
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#ifdef STM32F0
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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TIM_DeInit(TIM2);
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if(_Tim == nullptr)
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{
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// RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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_Tim = Timer::Create(0x01); // 直接占用TIMER2
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}
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// _Tim->SetFrequency(50); // 5Hz 20ms
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// 使用一个字节 需要自行配置分频系数
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_Tim->Prescaler = 400; // 分频 需要结果是 Period < 256 时能计数 20ms
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SendP = (ushort *)bs.GetBuffer();
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SendBufLen = bs.Length()/2;
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SendIndex = 0;
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_Tim->Period = SendP[0];
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// 取消接收时候的配置
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_Tim->Opened = true;
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_Tim->Close();
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// 注册中断
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_Tim->Register(OnSend,this);
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// 重新配置
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_Tim->SetCounter(0x00000000);
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_Tim->Config();
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Stat = Sending;
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debug_printf("Start %04X\r\n",SendP[0]);
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// 暂时避过 定时器一启动立马中断的错误
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ErrorIRQ = true;
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// 开始 中断内处理数据
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// _Pwm->Open();
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_Tim->Open();
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// 等待结束
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_SendOK = false;
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WaitHandle wh;
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wh.WaitOne(2000, _SendOK);
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// 结束 不论是超时还是发送结束都关闭pwm和定时器
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//_Pwm->Close();
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_Tim->Register(nullptr,nullptr);
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_Tim->Close();
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// 清空使用的数据
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SendIndex = 0;
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SendP = nullptr;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, DISABLE);
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#endif
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return true;
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}
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void IR::OnSend(void* sender, void* param)
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{
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//TS("IR::OnSend");
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#ifdef STM32F0
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auto ir = (IR*)param;
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auto ti = (TIM_TypeDef*)(ir->_Pwm->_Timer);
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if(ErrorIRQ) // 避开打开定时器立马中断问题
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{
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ErrorIRQ = false;
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ir->_Pwm->Open();
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TIM_Cmd(ti, ENABLE);
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//debug_printf("pwm open\r\n");
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return;
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}
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// PWM归位
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TIM_SetCounter(ti, 0x00000000);
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// PWM变化
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//if(SendIndex % 2)
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if(SendIndex & 1) //不行 暂不知问题所在
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{
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TIM_Cmd(ti, ENABLE);
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}
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else
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{
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TIM_Cmd(ti, DISABLE);
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}
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// 下一个周期
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SendIndex += 1;
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auto ti2 = (TIM_TypeDef*)(ir->_Tim->_Timer);
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TIM_SetAutoreload(ti2, SendP[SendIndex]);
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if(SendIndex >= SendBufLen)
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{
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// 发送完毕
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TIM_SetCounter(ti, 0x00000000);
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TIM_Cmd(ti, DISABLE);
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TIM_Cmd(ti2, DISABLE);
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//ir->_Pwm->Close();
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//ir->_Tim->Close();
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Stat = SendOver;
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_SendOK = true;
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return;
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}
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#endif
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}
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int IR::Receive(Buffer& bs, int sTimeout)
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{
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TS("IR::Receive");
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#ifdef STM32F0
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uint bufLen = bs.Length();
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uint DmaLen = bufLen/2 -1;
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// 捕获引脚初始化
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if(_Port == nullptr)
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{
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_Port = new AlternatePort(); // 在括号内直接写引脚会初始化失败
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_Port->Set(PA1);
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_Port->Open();
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_Port->AFConfig(Port::AF_2);
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}
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if(_Tim == nullptr) _Tim = Timer::Create(0x01); // 直接占用TIMER2
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// RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, DISABLE);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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// TIM_DeInit(TIM2);
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// _Tim->SetFrequency(50); //Prescaler Period 需要定制
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_Tim->Prescaler = 400;
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// 波形间隔悬殊，用一个字节误差太大
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_Tim->Period = 65536;
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_Tim->Config();
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/* 使能自动装载 */
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TIM_ARRPreloadConfig(TIM2, ENABLE);
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// 捕获设置
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// 2通道映射到1通道 配套使用DMA1 Channel5
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TIM_ICInitTypeDef TIM_ICInitStructure;
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TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
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TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_BothEdge;
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TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_IndirectTI;
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TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
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TIM_ICInitStructure.TIM_ICFilter = 0x0;
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TIM_PWMIConfig(TIM2, &TIM_ICInitStructure);
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/* Select the TIM2 Input Trigger: TI2FP2 */
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TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2);
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/* 捕获的同时清空定时器计数，不能使用 这个复位是以电平为准，不是沿
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使用会使采集到的数据一半为零 后期数据处理时候做差就好 */
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// TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);
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// TIM_SelectMasterSlaveMode(TIM2,TIM_MasterSlaveMode_Enable);
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// DMA 读取CNT寄存器，一字节设置 无法解决数据冗余
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// TIM_DMAConfig(TIM2, TIM_DMABase_CNT, TIM_DMABurstLength_1Transfer);
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//TIM_Cmd(TIM2, ENABLE);
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// DMA 时钟
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
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// 使用通道5
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/* DMA1 Channel1 Config */
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DMA_InitTypeDef DMA_InitStructure;
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DMA_DeInit(DMA1_Channel5);
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DMA_DeInit(DMA1_Channel5);
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DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(TIM2->CNT);
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DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)bs.GetBuffer();
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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DMA_InitStructure.DMA_BufferSize = DmaLen;
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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DMA_Init(DMA1_Channel5, &DMA_InitStructure);
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// 开启DMA TIME
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DMA_Cmd(DMA1_Channel5, ENABLE);
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TIM_Cmd(TIM2, ENABLE);
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// 连接DMA 触发机制
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TIM_DMACmd(TIM2, TIM_DMA_CC1, ENABLE);
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// 等待起始条件，DMA 开始搬运数据
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Stat = WaitRev;
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TimeWheel tw(sTimeout * 1000);
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tw.Sleep = 50;
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while(!tw.Expired() && DMA_GetCurrDataCounter(DMA1_Channel5) == DmaLen);
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if(tw.Expired())
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{
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// 超时没有收到学习
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Stat = RevOver;
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// 关闭Time DMA
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DMA_Cmd(DMA1_Channel5, DISABLE);
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TIM_Cmd(TIM2, DISABLE);
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int length = DMA_GetCurrDataCounter(DMA1_Channel5);
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debug_printf("\r\n DMA::Counter %d \r\n", length);
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bs.SetLength(0);
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return -1;
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}
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// 进入接收状态
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Stat = Rev;
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debug_printf("\r\n开始接收数据\r\n");
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// 400ms 接收时间 以空调为准 180ms 翻倍基本可以罩住所有类型
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// 不能使用 定时器 中断作为超时依据 只能等。。
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tw.Reset(0,400);
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while(!tw.Expired()) Sys.Sleep(50);
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// 接收结束
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// 关闭Time DMA
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DMA_Cmd(DMA1_Channel5, DISABLE);
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TIM_Cmd(TIM2, DISABLE);
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// 本次接收结束，关闭 RCC 防止这些配置贻害无穷
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, DISABLE);
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// 拿到数据长度
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uint len = DmaLen - DMA_GetCurrDataCounter(DMA1_Channel5);
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debug_printf("DMA REV %d byte\r\n",len);
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if(len > 30)
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{
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if(len >= DmaLen)
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{
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bs.SetLength(0);
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return -1;
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}
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Stat = RevOver;
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// 处理数据，将绝对数 变为相对。便于发送时候使用
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ushort * p = (ushort *)bs.GetBuffer();
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for(int i = 0; i < len-1; i++)
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{
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if(p[i+1] > p[i])
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p[i] = p[i+1] - p[i];
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else
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{
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int a = p[i+1] + 0x10000;
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p[i] = a - p[i];
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}
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}
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len <<= 1;
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bs.SetLength(len);
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return len;
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}
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else
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{
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Stat = RevOver;
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bs.SetLength(0);
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return -1;
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}
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#else
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return -1;
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#endif
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}
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