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i2c while removed working
Fork of CDMS_tc2 by
main.cpp
- Committer:
- sakthipriya
- Date:
- 2014-12-20
- Revision:
- 2:c75bb488d17c
- Parent:
- 1:24c54d213671
- Child:
- 3:6c1ed31073f0
File content as of revision 2:c75bb488d17c:
#include "mbed.h" #include "rtos.h" const int addr = 0x20; //slave address I2C master (D14,D15); //configure pins p27,p28 as I2C master Serial pc (USBTX,USBRX); DigitalOut interrupt(D9); InterruptIn data_ready(D10); int reset; typedef struct { char data; // To avoid dynamic memory allocation int length; }i2c_data; //Mail<i2c_data,16> i2c_data_receive; Mail<i2c_data,16> i2c_data_send; Thread * ptr_t_i2c; void FUNC_I2C_MASTER_FSLAVE(char * data,int length) { //printf("press backspace for master to start \n\r"); //while(1){ //interrupt = 0; // if(pc.getc()=='z'){ //wait(0.5); interrupt = 1; printf("\nMaster executed\n"); bool ack0 =true; bool loopvariable0 =true; //char *data = new char; //*data = 'b'; master.frequency(100000); //set clock frequency //master.start(); /*while(write2slave) { *writedata = pc.getc(); wait(0.5); printf("master clk freq setup and addressing slave\n\r"); master.start(); //initiating the data transfer master_status_write = (bool) master.write(addr|0x00,writedata,1); if(master_status_write==0) { printf("master has written %c to slave\n\r",*writedata); write2slave=false; } }*/ while(ack0 && data_ready ==1 ) { //printf("2 master clk freq setup and addressing slave\n\r"); master.start(); //initiating the data transfer ack0 = master.read(addr,data,length); } if(!ack0) { printf("\n master has read %s from slave\n\r",data); loopvariable0=false; } //master.stop(); //printf("done\n\r"); //delete data; interrupt=0; printf("\n blahblah\n\r"); } typedef struct { char Voltage[9]; char Current[5]; char Temperature[2]; char PanelTemperature[3];//read by the 4 thermistors on solar panels char BatteryTemperature; //to be populated char faultpoll; //polled faults char faultir; //interrupted faults char power_mode; //power modes char AngularSpeed[3]; char Bnewvalue[3]; //float magnetometer,gyro=>to be addes } hk_data; hk_data decode_data; void TC_DECODE(char *data_hk) //getting the structure back from hk data sent by bae { for(int i=0;i<=7;i++) { decode_data.Voltage[i] = data_hk[i]; decode_data.Voltage[8] = '\0'; } for(int i=0;i<=3;i++) { decode_data.Current[i] = data_hk[8+i]; decode_data.Current[4] = '\0'; } decode_data.Temperature[0] = data_hk[12]; decode_data.Temperature[1] = '\0'; for(int i=0;i<=1;i++) { decode_data.PanelTemperature[i] = data_hk[13+i]; decode_data.PanelTemperature[2] = '\0'; } decode_data.BatteryTemperature = data_hk[15]; decode_data.faultpoll = data_hk[16]; decode_data.faultir = data_hk[17]; decode_data.power_mode = data_hk[18]; for(int i=0;i<=1;i++) { decode_data.AngularSpeed[i] = data_hk[19+i]; decode_data.AngularSpeed[2] = '\0'; } for(int i=0;i<=1;i++) { decode_data.Bnewvalue[i] = data_hk[21+i]; decode_data.Bnewvalue[2] = '\0'; } printf("\n voltage %s\n\r",decode_data.Voltage); printf("\n current %s\n\r",decode_data.Current); printf("\n faultpoll %c\n\r",decode_data.faultpoll); } void T_I2C_MASTER_FSLAVE(void const *args) { char data_receive[25]; while(1) { Thread::signal_wait(0x1); FUNC_I2C_MASTER_FSLAVE(data_receive,25); /*i2c_data * i2c_data_r = i2c_data_receive.alloc(); strcpy(i2c_data_r->data , data_receive); i2c_data_r->length = 25; i2c_data_receive.put(i2c_data_r);*/ printf("\n Data received from slave is %s\n\r",data_receive); TC_DECODE(data_receive); } } void FUNC_INT() { ptr_t_i2c->signal_set(0x1); } char writedata; bool write2slave; bool master_status_write; void FUNC_MASTER_WRITE() { //wait(1); write2slave=true; char data = pc.getc(); interrupt = 1; i2c_data * i2c_data_s = i2c_data_send.alloc(); i2c_data_s->data = data; i2c_data_s->length = 1; i2c_data_send.put(i2c_data_s); master_status_write = true; // interrupt = 1; osEvent evt = i2c_data_send.get(); if (evt.status == osEventMail) { i2c_data *i2c_data_s = (i2c_data*)evt.value.p; writedata = i2c_data_s -> data; master.frequency(100000); //set clock frequency while(write2slave && interrupt ==1 ) { printf("master clk freq setup and addressing slave\n\r"); master.start(); //initiating the data transfer master_status_write = (bool) master.write(addr|0x00,&writedata,1); if(master_status_write==0) { printf("master has written %c to slave\n\r",writedata); write2slave=false; } i2c_data_send.free(i2c_data_s); } } interrupt = 0; } int main() { interrupt=0; ptr_t_i2c = new Thread(T_I2C_MASTER_FSLAVE); data_ready.rise(&FUNC_INT); printf("\nstarted master\n"); while(1) { //Thread::wait(9000); //interrupt = 1; FUNC_MASTER_WRITE(); //interrupt = 0; ; } }