Marcelo Rebonatto / Mbed 2 deprecated PMED_Tempo

Versão do protegemed que calcula o tempo em ms da fuga, calcula o numero de onverflow (valores muito baixo) e underflow (valores muito altos). Além disso, calcula um valor médio a partir dos valores capturados e não apenas pela fft.

Dependencies:   EthernetInterface mbed-rtos mbed

Codes/Capture.cpp@1:917ca6b5d9d9, 2014-07-18 (annotated)

Committer:
rebonatto
Date:
Fri Jul 18 20:24:45 2014 +0000
Revision:
1:917ca6b5d9d9
Parent:
0:c64e1194230b
Child:
2:86c3cb25577b
Nova vers?o: problemas com excesso de mem?ria.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rebonatto 0:c64e1194230b 1 /*
rebonatto 0:c64e1194230b 2 * Capture.h
rebonatto 0:c64e1194230b 3 *
rebonatto 0:c64e1194230b 4 * Created on:
rebonatto 0:c64e1194230b 5 * Author:
rebonatto 0:c64e1194230b 6 */
rebonatto 0:c64e1194230b 7 #include "Capture.h"
rebonatto 0:c64e1194230b 8
rebonatto 0:c64e1194230b 9 Semaphore Capture::m_CaptureSemaphore(1); //used to alert the capture thread about a ready capture
rebonatto 0:c64e1194230b 10 int Capture::m_BufferIndex;
rebonatto 0:c64e1194230b 11 dmaLinkedListNode Capture::m_Nodes[2] __attribute__((section("AHBSRAM0"))); //this list holds the buffer configuration for the DMA peripheral
rebonatto 0:c64e1194230b 12 unsigned short int Capture::m_AdcBuffers[2][NUMBER_OF_SAMPLES][NUMBER_OF_CHANNELS] __attribute__((section("AHBSRAM0")));
rebonatto 1:917ca6b5d9d9 13 //Serial rfid_serial(p28,p27);
rebonatto 0:c64e1194230b 14
rebonatto 0:c64e1194230b 15 //This function prepares the capture buffers and starts the DMA peripheral
rebonatto 0:c64e1194230b 16 void Capture::Start()
rebonatto 0:c64e1194230b 17 {
rebonatto 0:c64e1194230b 18 m_Nodes[0].destAddr = (unsigned int)m_AdcBuffers[0];// HERE GOES THE BUFFER ADDRESS(unsigned int)adval;
rebonatto 0:c64e1194230b 19 m_Nodes[0].sourceAddr = (unsigned int)&LPC_ADC->ADGDR;
rebonatto 0:c64e1194230b 20 m_Nodes[0].dmaControl = (NUMBER_OF_SAMPLES*NUMBER_OF_CHANNELS)| DMA_DST_WIDTH_HALFWORD | DMA_SRC_WIDTH_HALFWORD | DMA_DST_INCREMENT | DMA_TC_INT;
rebonatto 0:c64e1194230b 21 m_Nodes[0].nextNode = (unsigned int)&m_Nodes[1];
rebonatto 0:c64e1194230b 22
rebonatto 0:c64e1194230b 23 m_Nodes[1].destAddr = (unsigned int)m_AdcBuffers[1];// HERE GOES THE BUFFER ADDRESS(unsigned int)adval2;
rebonatto 0:c64e1194230b 24 m_Nodes[1].sourceAddr = (unsigned int)&LPC_ADC->ADGDR;
rebonatto 0:c64e1194230b 25 m_Nodes[1].dmaControl = (NUMBER_OF_SAMPLES*NUMBER_OF_CHANNELS)| DMA_DST_WIDTH_HALFWORD | DMA_SRC_WIDTH_HALFWORD | DMA_DST_INCREMENT | DMA_TC_INT;
rebonatto 0:c64e1194230b 26 m_Nodes[1].nextNode = (unsigned int)&m_Nodes[0];
rebonatto 0:c64e1194230b 27
rebonatto 0:c64e1194230b 28 m_BufferIndex=0;
rebonatto 0:c64e1194230b 29
rebonatto 0:c64e1194230b 30 while(!(LPC_ADC->ADDR0&(1U<<31))); //waits the completion of the ADC Channel 0 capture - for synchronization purposes
rebonatto 0:c64e1194230b 31 while(!(LPC_ADC->ADDR0&(1U<<31))); //waits the completion of the ADC Channel 0 capture - for synchronization purposes
rebonatto 0:c64e1194230b 32
rebonatto 0:c64e1194230b 33 setup_channel(&m_Nodes[0],0,DMA_PERIPHERAL_ADC,DMA_MEMORY);
rebonatto 0:c64e1194230b 34 }
rebonatto 0:c64e1194230b 35
rebonatto 0:c64e1194230b 36 //This function initializes the ADC and DMA peripherals
rebonatto 0:c64e1194230b 37 void Capture::Initialize()
rebonatto 0:c64e1194230b 38 {
rebonatto 0:c64e1194230b 39 init_adc(Settings::get_FreqBase()*NUMBER_OF_SAMPLES*NUMBER_OF_CHANNELS);
rebonatto 0:c64e1194230b 40 select_channels(ADC_CH_0|ADC_CH_1|ADC_CH_2|ADC_CH_3|ADC_CH_4|ADC_CH_5);
rebonatto 0:c64e1194230b 41 LPC_ADC->ADCR |= ADC_MODE_BURST;
rebonatto 0:c64e1194230b 42
rebonatto 0:c64e1194230b 43 init_dma();
rebonatto 0:c64e1194230b 44
rebonatto 0:c64e1194230b 45 Start();
rebonatto 0:c64e1194230b 46
rebonatto 0:c64e1194230b 47 m_CaptureSemaphore.wait();
rebonatto 0:c64e1194230b 48 }
rebonatto 0:c64e1194230b 49
rebonatto 0:c64e1194230b 50 void Capture::Stop()
rebonatto 0:c64e1194230b 51 {
rebonatto 0:c64e1194230b 52 m_CaptureSemaphore.release(); //release semaphore
rebonatto 0:c64e1194230b 53 stop_channel();
rebonatto 0:c64e1194230b 54 }
rebonatto 0:c64e1194230b 55
rebonatto 0:c64e1194230b 56 void Capture::Wait()
rebonatto 0:c64e1194230b 57 {
rebonatto 0:c64e1194230b 58 m_CaptureSemaphore.wait(osWaitForever);
rebonatto 0:c64e1194230b 59 }
rebonatto 0:c64e1194230b 60
rebonatto 0:c64e1194230b 61 unsigned short int Capture::GetValue(int nsamples, int nchannel)
rebonatto 0:c64e1194230b 62 {
rebonatto 0:c64e1194230b 63 return ADC_CONVERT(m_AdcBuffers[m_BufferIndex][nsamples][nchannel]);
rebonatto 0:c64e1194230b 64 }
rebonatto 0:c64e1194230b 65
rebonatto 0:c64e1194230b 66 void Capture::CopyBuffer(int channel, unsigned short int *dest)
rebonatto 0:c64e1194230b 67 {
rebonatto 0:c64e1194230b 68 for(int i=0;i<Settings::get_Samples();i++)
rebonatto 0:c64e1194230b 69 {
rebonatto 0:c64e1194230b 70 dest[i] = GetValue(i,channel);
rebonatto 0:c64e1194230b 71 }
rebonatto 0:c64e1194230b 72 }
rebonatto 0:c64e1194230b 73
rebonatto 0:c64e1194230b 74 //DMA ISR signals the capture thread about the end of capture event
rebonatto 0:c64e1194230b 75 extern "C" void DMA_IRQHandler(void)
rebonatto 0:c64e1194230b 76 {
rebonatto 0:c64e1194230b 77 Capture::ISRHandler();
rebonatto 0:c64e1194230b 78 }
rebonatto 0:c64e1194230b 79
rebonatto 0:c64e1194230b 80 void Capture::ISRHandler()
rebonatto 0:c64e1194230b 81 {
rebonatto 0:c64e1194230b 82 Capture::m_BufferIndex = (~Capture::m_BufferIndex)&1;
rebonatto 0:c64e1194230b 83
rebonatto 0:c64e1194230b 84 Capture::m_CaptureSemaphore.release();
rebonatto 0:c64e1194230b 85 LPC_GPDMA->DMACIntTCClear = 0xFF;
rebonatto 1:917ca6b5d9d9 86 }
rebonatto 1:917ca6b5d9d9 87
rebonatto 1:917ca6b5d9d9 88 void Capture::ReadRFID(int channel,char *rfid)
rebonatto 1:917ca6b5d9d9 89 {
rebonatto 1:917ca6b5d9d9 90 /*
rebonatto 1:917ca6b5d9d9 91 char cmd[4];
rebonatto 1:917ca6b5d9d9 92 cmd[0] = 'S';
rebonatto 1:917ca6b5d9d9 93 cmd[1] = '0'+channel;
rebonatto 1:917ca6b5d9d9 94 cmd[2] = '\n';
rebonatto 1:917ca6b5d9d9 95 cmd[3] = '\0';
rebonatto 1:917ca6b5d9d9 96
rebonatto 1:917ca6b5d9d9 97 //send
rebonatto 1:917ca6b5d9d9 98 rfid_serial.puts(cmd);
rebonatto 1:917ca6b5d9d9 99
rebonatto 1:917ca6b5d9d9 100 //receive
rebonatto 1:917ca6b5d9d9 101 char ch=0;
rebonatto 1:917ca6b5d9d9 102 char ans[10];
rebonatto 1:917ca6b5d9d9 103 int cnt=0;
rebonatto 1:917ca6b5d9d9 104 int tmout=1000;
rebonatto 1:917ca6b5d9d9 105 while(ch != '\n' && tmout-- && cnt<9)
rebonatto 1:917ca6b5d9d9 106 {
rebonatto 1:917ca6b5d9d9 107 if(rfid_serial.readable())
rebonatto 1:917ca6b5d9d9 108 {
rebonatto 1:917ca6b5d9d9 109 ch = rfid_serial.getc();
rebonatto 1:917ca6b5d9d9 110 if(!((ch>='0' && ch<='9') || (ch >= 'A' && ch <= 'F')))ch='0';
rebonatto 1:917ca6b5d9d9 111 ans[cnt++] = ch;
rebonatto 1:917ca6b5d9d9 112 }
rebonatto 1:917ca6b5d9d9 113 else
rebonatto 1:917ca6b5d9d9 114 wait_ms(1);
rebonatto 1:917ca6b5d9d9 115
rebonatto 1:917ca6b5d9d9 116 }
rebonatto 1:917ca6b5d9d9 117 ans[cnt-1] = '\0';
rebonatto 1:917ca6b5d9d9 118 for(int i=0;i<8;i++)
rebonatto 1:917ca6b5d9d9 119 rfid[i] = ans[i];
rebonatto 1:917ca6b5d9d9 120 */
rebonatto 0:c64e1194230b 121 }