Pradeep Kotipalli / Mbed 2 deprecated CDMS_BAE

hey

Dependencies:   SDFileSystem mbed-rtos mbed

Fork of CDMS_BAE by sakthi priya amirtharaj

i2c.cpp@9:4c728c4fe2ce, 2015-02-06 (annotated)

Committer:
pradeepvk2208
Date:
Fri Feb 06 18:41:13 2015 +0000
Revision:
9:4c728c4fe2ce
Parent:
8:4acac3bf5e9b 
hope dis works

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sakthipriya 7:60e940b7a36b 1 #include "mbed.h"
sakthipriya 7:60e940b7a36b 2 #include "rtos.h"
sakthipriya 7:60e940b7a36b 3 #include "i2c.h"
sakthipriya 7:60e940b7a36b 4 DigitalOut interrupt(D9);
sakthipriya 7:60e940b7a36b 5 const int addr = 0x20; //slave address
sakthipriya 7:60e940b7a36b 6 I2C master (D14,D15); //configure pins p27,p28 as I2C master
sakthipriya 7:60e940b7a36b 7 Serial pc (USBTX,USBRX);
sakthipriya 7:60e940b7a36b 8 //DigitalOut interrupt(D9);
sakthipriya 7:60e940b7a36b 9 //InterruptIn data_ready(D10);
sakthipriya 7:60e940b7a36b 10
sakthipriya 7:60e940b7a36b 11 int reset;
sakthipriya 7:60e940b7a36b 12 Timer t;
sakthipriya 7:60e940b7a36b 13 Timer t1;
sakthipriya 7:60e940b7a36b 14 Timer t2;
sakthipriya 7:60e940b7a36b 15 Timer t3;
sakthipriya 7:60e940b7a36b 16
sakthipriya 7:60e940b7a36b 17 typedef struct
sakthipriya 7:60e940b7a36b 18 {
sakthipriya 7:60e940b7a36b 19 char data; // To avoid dynamic memory allocation
sakthipriya 7:60e940b7a36b 20 int length;
sakthipriya 7:60e940b7a36b 21 }i2c_data;
sakthipriya 7:60e940b7a36b 22
sakthipriya 7:60e940b7a36b 23 //Mail<i2c_data,16> i2c_data_receive;
sakthipriya 7:60e940b7a36b 24 Mail<i2c_data,16> i2c_data_send;
sakthipriya 7:60e940b7a36b 25
sakthipriya 7:60e940b7a36b 26 //Thread * ptr_t_i2c;
sakthipriya 7:60e940b7a36b 27 void FUNC_I2C_MASTER_FSLAVE(char * data,int length)
sakthipriya 7:60e940b7a36b 28 {
sakthipriya 7:60e940b7a36b 29
sakthipriya 7:60e940b7a36b 30
sakthipriya 7:60e940b7a36b 31 bool ack0 =true;
sakthipriya 7:60e940b7a36b 32
sakthipriya 7:60e940b7a36b 33 interrupt = 1;
sakthipriya 7:60e940b7a36b 34 t1.start();
sakthipriya 7:60e940b7a36b 35 //wait_ms(20);
sakthipriya 7:60e940b7a36b 36 ack0 = master.read(addr|1,data,length);
sakthipriya 7:60e940b7a36b 37 t1.stop();
sakthipriya 7:60e940b7a36b 38
sakthipriya 7:60e940b7a36b 39
sakthipriya 7:60e940b7a36b 40 if(!ack0)
sakthipriya 7:60e940b7a36b 41 {
sakthipriya 7:60e940b7a36b 42 printf("\n master has read %s from slave\n\r",data);
sakthipriya 7:60e940b7a36b 43
sakthipriya 7:60e940b7a36b 44 }
sakthipriya 7:60e940b7a36b 45 //master.stop();
sakthipriya 7:60e940b7a36b 46
sakthipriya 7:60e940b7a36b 47 printf("\n%d\n\r",t1.read_us());
sakthipriya 7:60e940b7a36b 48 t1.reset();
sakthipriya 7:60e940b7a36b 49 storedata(data);
sakthipriya 7:60e940b7a36b 50 interrupt=0;
sakthipriya 7:60e940b7a36b 51
sakthipriya 7:60e940b7a36b 52 }
sakthipriya 7:60e940b7a36b 53
sakthipriya 7:60e940b7a36b 54 typedef struct {
sakthipriya 7:60e940b7a36b 55 char Voltage[9];
sakthipriya 7:60e940b7a36b 56 char Current[5];
sakthipriya 7:60e940b7a36b 57 char Temperature[2];
sakthipriya 7:60e940b7a36b 58 char PanelTemperature[3];//read by the 4 thermistors on solar panels
sakthipriya 7:60e940b7a36b 59 char BatteryTemperature; //to be populated
sakthipriya 7:60e940b7a36b 60 char faultpoll; //polled faults
sakthipriya 7:60e940b7a36b 61 char faultir; //interrupted faults
sakthipriya 7:60e940b7a36b 62 char power_mode; //power modes
sakthipriya 7:60e940b7a36b 63 char AngularSpeed[3];
sakthipriya 7:60e940b7a36b 64 char Bnewvalue[3];
sakthipriya 7:60e940b7a36b 65
sakthipriya 7:60e940b7a36b 66 //float magnetometer,gyro=>to be addes
sakthipriya 7:60e940b7a36b 67 } hk_data;
sakthipriya 7:60e940b7a36b 68 hk_data decode_data;
sakthipriya 7:60e940b7a36b 69
sakthipriya 8:4acac3bf5e9b 70 void TC_DECODE(char *data_hk) //getting the structure back from hk data sent by bae
sakthipriya 7:60e940b7a36b 71 {
sakthipriya 7:60e940b7a36b 72 for(int i=0;i<=7;i++)
sakthipriya 7:60e940b7a36b 73 {
sakthipriya 7:60e940b7a36b 74 decode_data.Voltage[i] = data_hk[i];
sakthipriya 7:60e940b7a36b 75 decode_data.Voltage[8] = '\0';
sakthipriya 7:60e940b7a36b 76 }
sakthipriya 7:60e940b7a36b 77 for(int i=0;i<=3;i++)
sakthipriya 7:60e940b7a36b 78 {
sakthipriya 7:60e940b7a36b 79 decode_data.Current[i] = data_hk[8+i];
sakthipriya 7:60e940b7a36b 80 decode_data.Current[4] = '\0';
sakthipriya 7:60e940b7a36b 81 }
sakthipriya 7:60e940b7a36b 82 decode_data.Temperature[0] = data_hk[12];
sakthipriya 7:60e940b7a36b 83 decode_data.Temperature[1] = '\0';
sakthipriya 7:60e940b7a36b 84 for(int i=0;i<=1;i++)
sakthipriya 7:60e940b7a36b 85 {
sakthipriya 7:60e940b7a36b 86 decode_data.PanelTemperature[i] = data_hk[13+i];
sakthipriya 7:60e940b7a36b 87 decode_data.PanelTemperature[2] = '\0';
sakthipriya 7:60e940b7a36b 88 }
sakthipriya 7:60e940b7a36b 89 decode_data.BatteryTemperature = data_hk[15];
sakthipriya 7:60e940b7a36b 90 decode_data.faultpoll = data_hk[16];
sakthipriya 7:60e940b7a36b 91 decode_data.faultir = data_hk[17];
sakthipriya 7:60e940b7a36b 92 decode_data.power_mode = data_hk[18];
sakthipriya 7:60e940b7a36b 93 for(int i=0;i<=1;i++)
sakthipriya 7:60e940b7a36b 94 {
sakthipriya 7:60e940b7a36b 95 decode_data.AngularSpeed[i] = data_hk[19+i];
sakthipriya 7:60e940b7a36b 96 decode_data.AngularSpeed[2] = '\0';
sakthipriya 7:60e940b7a36b 97 }
sakthipriya 7:60e940b7a36b 98 for(int i=0;i<=1;i++)
sakthipriya 7:60e940b7a36b 99 {
sakthipriya 7:60e940b7a36b 100 decode_data.Bnewvalue[i] = data_hk[21+i];
sakthipriya 7:60e940b7a36b 101 decode_data.Bnewvalue[2] = '\0';
sakthipriya 7:60e940b7a36b 102 }
sakthipriya 7:60e940b7a36b 103 printf("\n voltage %s\n\r",decode_data.Voltage);
sakthipriya 7:60e940b7a36b 104 printf("\n current %s\n\r",decode_data.Current);
sakthipriya 7:60e940b7a36b 105 printf("\n faultpoll %c\n\r",decode_data.faultpoll);
sakthipriya 8:4acac3bf5e9b 106 }
sakthipriya 7:60e940b7a36b 107
sakthipriya 7:60e940b7a36b 108
sakthipriya 7:60e940b7a36b 109
sakthipriya 7:60e940b7a36b 110 char writedata;
sakthipriya 7:60e940b7a36b 111 bool write2slave;
sakthipriya 7:60e940b7a36b 112 bool master_status_write;
sakthipriya 7:60e940b7a36b 113 void FUNC_MASTER_WRITE()
sakthipriya 7:60e940b7a36b 114 { //wait(1);
sakthipriya 7:60e940b7a36b 115 write2slave=true;
sakthipriya 7:60e940b7a36b 116
sakthipriya 7:60e940b7a36b 117
sakthipriya 7:60e940b7a36b 118
sakthipriya 7:60e940b7a36b 119 char data = pc.getc();
sakthipriya 7:60e940b7a36b 120 interrupt = 1;
sakthipriya 7:60e940b7a36b 121 t.start();
sakthipriya 7:60e940b7a36b 122 t3.start();
sakthipriya 7:60e940b7a36b 123 wait_ms(20);
sakthipriya 7:60e940b7a36b 124 i2c_data * i2c_data_s = i2c_data_send.alloc();
sakthipriya 7:60e940b7a36b 125 i2c_data_s->data = data;
sakthipriya 7:60e940b7a36b 126 i2c_data_s->length = 1;
sakthipriya 7:60e940b7a36b 127 i2c_data_send.put(i2c_data_s);
sakthipriya 7:60e940b7a36b 128 master_status_write = true;
sakthipriya 7:60e940b7a36b 129
sakthipriya 7:60e940b7a36b 130 // interrupt = 1;
sakthipriya 7:60e940b7a36b 131
sakthipriya 7:60e940b7a36b 132 osEvent evt = i2c_data_send.get();
sakthipriya 7:60e940b7a36b 133 if (evt.status == osEventMail)
sakthipriya 7:60e940b7a36b 134 {
sakthipriya 7:60e940b7a36b 135 i2c_data *i2c_data_s = (i2c_data*)evt.value.p;
sakthipriya 7:60e940b7a36b 136 writedata = i2c_data_s -> data;
sakthipriya 7:60e940b7a36b 137 t.stop();
sakthipriya 7:60e940b7a36b 138 //t3.start();
sakthipriya 7:60e940b7a36b 139 master_status_write = (bool) master.write(addr|0x00,&writedata,1);
sakthipriya 7:60e940b7a36b 140 t3.stop();
sakthipriya 7:60e940b7a36b 141 if(master_status_write==0)
sakthipriya 7:60e940b7a36b 142 {
sakthipriya 7:60e940b7a36b 143 printf("master has written %c to slave\n\r",writedata);
sakthipriya 7:60e940b7a36b 144 write2slave=false;
sakthipriya 7:60e940b7a36b 145 }
sakthipriya 7:60e940b7a36b 146 i2c_data_send.free(i2c_data_s);
sakthipriya 7:60e940b7a36b 147 printf("\n%d\n",t.read_us());
sakthipriya 7:60e940b7a36b 148 t.reset();
sakthipriya 7:60e940b7a36b 149 printf("\n%d\n",t3.read_us());
sakthipriya 7:60e940b7a36b 150 t3.reset();
sakthipriya 7:60e940b7a36b 151 }
sakthipriya 7:60e940b7a36b 152 interrupt = 0;
sakthipriya 7:60e940b7a36b 153 }
sakthipriya 7:60e940b7a36b 154
sakthipriya 7:60e940b7a36b 155
sakthipriya 7:60e940b7a36b 156
sakthipriya 7:60e940b7a36b 157