main.cpp

00001 // Goal: Program that receives and send 4 channels of data.
00002 // Receives: 1kHz
00003 // Sends: 70kbits/s
00004 
00005 //DONE:
00006   //  O programa lê e envia dados da taxa indicada por TIMER_RATE
00007 //TODO:
00008    // Comunicação com bluetooth
00009    // Ver porque o tempo de envio está tão alto.
00010 
00011 #include "mbed.h"
00012 
00013 /*--------------Signal Definition-----------------*/
00014 //16bits buffer
00015 #define ECG1 0
00016 #define ECG2 1
00017 #define RESP 2
00018 #define PPG 3
00019 
00020 //8bits buffer
00021 #define LSB_ECG1 0
00022 #define MSB_ECG1 1
00023 #define LSB_ECG2 2
00024 #define MSB_ECG2 3
00025 #define LSB_RESP 4
00026 #define MSB_RESP 5
00027 #define LSB_PPG 6
00028 #define MSB_PPG 7
00029 
00030 
00031 /*---------------- Sample Speed Timer --------------*/
00032 #define TIMER_RATE 0.01
00033 
00034 /*-----READS THE ANALOG SIGNAL FROM THE SENSORS-----*/
00035 
00036 AnalogIn Ecg1(A0);
00037 AnalogIn Ecg2(A1);
00038 AnalogIn Resp(A3);
00039 AnalogIn Ppg(A4);
00040 
00041 DigitalOut testSpeed(PTE1);
00042 
00043 
00044 /*------CONTROLS THE DATA RATE OF THE READING------*/
00045 Ticker t0;
00046 Serial pc(USBTX,USBRX);
00047 
00048 
00049 /*---HANDLES THE TIMER AND SERIAL INTERRUPTIONS-----*/
00050 
00051 void t0_handler(void);
00052 void rx_Handler(void);
00053 
00054 char test = 0;  // Tests the data received from the computer in order to start the reading 
00055 
00056 
00057 /*------------BUFFER TO STORE DATA------------------*/
00058 
00059 uint16_t buffer_16[4] = {0,0,0,0};
00060 char buffer_8[8] = {0,0,0,0,0,0,0,0};
00061 
00062 
00063 int main() {
00064     pc.printf("main");
00065     pc.attach(&rx_Handler, pc.RxIrq);
00066     
00067     
00068     while(1){}       
00069 
00070         //aciona porta
00071         
00072         //pc.printf("%i,%i,%i,%i\n",buffer[ECG1],buffer[ECG2],buffer[RESP],buffer[PPG]);//PUTC
00073        
00074  
00075 }
00076 
00077 /*----------------------FUNCTIONS-----------------------*/
00078 
00079     //Reads and send data to the computer 
00080 
00081 void t0_handler(void){
00082 
00083 //Reads the Analog Ports
00084         buffer_16[ECG1] = Ecg1.read_u16();
00085         buffer_16[ECG2] = Ecg2.read_u16();
00086         buffer_16[RESP] = Resp.read_u16();
00087         buffer_16[PPG] = Ppg.read_u16();
00088 
00089 //Divides de buffer 16 into multiple buffers;
00090 //Falta rotacionar:
00091 //Ver Ser a rotação está correta
00092 
00093         buffer_8[LSB_ECG1] = (char)(buffer_16[ECG1]);
00094         buffer_8[MSB_ECG1] = (char)((buffer_16[ECG1]&0xFF)>>8);
00095         
00096         buffer_8[LSB_ECG2] = (char)(buffer_16[ECG2]);
00097         buffer_8[LSB_ECG2] = (char)((buffer_16[ECG2]&0xFF)>>8);
00098         
00099         buffer_8[LSB_RESP] = (char)(buffer_16[RESP]);
00100         buffer_8[MSB_RESP] = (char)((buffer_16[RESP]&0xFF)>>8);
00101         
00102         buffer_8[LSB_PPG] = (char)(buffer_16[PPG]);
00103         buffer_8[MSB_PPG] = (char)((buffer_16[PPG]&0xFF)>>8);
00104     
00105 //Sends to the computer
00106         testSpeed = 1;
00107         
00108         pc.putc(buffer_8[LSB_ECG1]);       //texto se foi bem sucedida
00109         pc.putc(buffer_8[MSB_ECG1]);
00110         pc.putc(buffer_8[LSB_ECG2]);
00111         pc.putc(buffer_8[MSB_ECG2]);
00112         pc.putc(buffer_8[LSB_RESP]);
00113         pc.putc(buffer_8[MSB_RESP]);
00114         pc.putc(buffer_8[LSB_PPG]);
00115         pc.putc(buffer_8[MSB_PPG]);
00116         
00117        
00118         testSpeed = 0;
00119   
00120     
00121     }
00122 
00123     //This function must 
00124 
00125 void rx_Handler(void){
00126     // A programação não estava funcionando poisnão se deve utilizar interrupções para realizar grandes tarefas;
00127     // Elas travam e não funciona mais nada.
00128     // Como fazer para não ficar testando no main?? Sexta feira no globo reporter
00129     
00130     test = pc.getc();    // it gets the received character
00131     pc.putc(test);//debug
00132 
00133 //--Tests the Receive Character----
00134 
00135     if(test == '2'|| test == '2')
00136         {           
00137     t0.attach(&t0_handler,TIMER_RATE);
00138         
00139     }else if (test=='3'|| test == '3')
00140         {
00141     t0.detach();
00142         }   
00143 
00144   
00145 }