sakthi priya amirtharaj / Mbed 2 deprecated master_working_obama

master working

Dependencies:   mbed-rtos mbed

Fork of master_working_1_2_reset_test by sakthi priya amirtharaj

main.cpp@5:cb35b461fa29, 2015-01-22 (annotated)

Committer:
sakthipriya
Date:
Thu Jan 22 14:34:49 2015 +0000
Revision:
5:cb35b461fa29
Parent:
4:7992ea5e41ed 
master working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sakthipriya 0:58b0c597a58c 1 #include "mbed.h"
sakthipriya 0:58b0c597a58c 2 #include "rtos.h"
sakthipriya 0:58b0c597a58c 3
sakthipriya 0:58b0c597a58c 4 const int addr = 0x20; //slave address
sakthipriya 0:58b0c597a58c 5 I2C master (D14,D15); //configure pins p27,p28 as I2C master
sakthipriya 0:58b0c597a58c 6 Serial pc (USBTX,USBRX);
sakthipriya 0:58b0c597a58c 7 DigitalOut interrupt(D9);
sakthipriya 0:58b0c597a58c 8 InterruptIn data_ready(D10);
sakthipriya 0:58b0c597a58c 9
sakthipriya 0:58b0c597a58c 10 int reset;
sakthipriya 0:58b0c597a58c 11
sakthipriya 0:58b0c597a58c 12 typedef struct
sakthipriya 0:58b0c597a58c 13 {
sakthipriya 0:58b0c597a58c 14 char data; // To avoid dynamic memory allocation
sakthipriya 0:58b0c597a58c 15 int length;
sakthipriya 0:58b0c597a58c 16 }i2c_data;
sakthipriya 0:58b0c597a58c 17
sakthipriya 0:58b0c597a58c 18 Mail<i2c_data,16> i2c_data_receive;
sakthipriya 0:58b0c597a58c 19 Mail<i2c_data,16> i2c_data_send;
sakthipriya 4:7992ea5e41ed 20 unsigned char* data_reg = (unsigned char*)0x40067004;
sakthipriya 4:7992ea5e41ed 21 unsigned char* status_reg = (unsigned char*)0x40067003;
sakthipriya 4:7992ea5e41ed 22 unsigned char* c1_reg = (unsigned char*)0x40067002;
sakthipriya 4:7992ea5e41ed 23 unsigned char* c2_reg = (unsigned char*)0x40067005;
sakthipriya 4:7992ea5e41ed 24 unsigned char* freq_reg = (unsigned char*)0x40067001;
sakthipriya 0:58b0c597a58c 25
sakthipriya 0:58b0c597a58c 26 Thread * ptr_t_i2c;
sakthipriya 0:58b0c597a58c 27 void FUNC_I2C_MASTER_FSLAVE(char * data,int length)
sakthipriya 0:58b0c597a58c 28 {
sakthipriya 0:58b0c597a58c 29 //printf("press backspace for master to start \n\r");
sakthipriya 0:58b0c597a58c 30 //while(1){
sakthipriya 0:58b0c597a58c 31 //interrupt = 0;
sakthipriya 0:58b0c597a58c 32 // if(pc.getc()=='z'){
sakthipriya 0:58b0c597a58c 33 wait(0.5);
sakthipriya 0:58b0c597a58c 34 interrupt = 1;
sakthipriya 0:58b0c597a58c 35 printf("\nMaster executed\n");
sakthipriya 0:58b0c597a58c 36
sakthipriya 0:58b0c597a58c 37
sakthipriya 0:58b0c597a58c 38 bool ack0 =true;
sakthipriya 0:58b0c597a58c 39 bool loopvariable0 =true;
sakthipriya 0:58b0c597a58c 40 //char *data = new char;
sakthipriya 0:58b0c597a58c 41 //*data = 'b';
sakthipriya 0:58b0c597a58c 42
sakthipriya 0:58b0c597a58c 43
sakthipriya 0:58b0c597a58c 44
sakthipriya 5:cb35b461fa29 45 // master.frequency(100000); //set clock frequency
sakthipriya 5:cb35b461fa29 46 master.start();
sakthipriya 0:58b0c597a58c 47 /*while(write2slave)
sakthipriya 0:58b0c597a58c 48 { *writedata = pc.getc();
sakthipriya 0:58b0c597a58c 49 wait(0.5);
sakthipriya 0:58b0c597a58c 50
sakthipriya 0:58b0c597a58c 51 printf("master clk freq setup and addressing slave\n\r");
sakthipriya 0:58b0c597a58c 52 master.start(); //initiating the data transfer
sakthipriya 0:58b0c597a58c 53 master_status_write = (bool) master.write(addr|0x00,writedata,1);
sakthipriya 0:58b0c597a58c 54 if(master_status_write==0)
sakthipriya 0:58b0c597a58c 55 {
sakthipriya 0:58b0c597a58c 56 printf("master has written %c to slave\n\r",*writedata);
sakthipriya 0:58b0c597a58c 57 write2slave=false;
sakthipriya 0:58b0c597a58c 58 }
sakthipriya 0:58b0c597a58c 59
sakthipriya 0:58b0c597a58c 60
sakthipriya 0:58b0c597a58c 61 }*/
greenroshks 3:7a895e0fdd45 62 //wait(0.5);
sakthipriya 4:7992ea5e41ed 63 while(ack0 )
sakthipriya 0:58b0c597a58c 64 {
sakthipriya 4:7992ea5e41ed 65 //printf("\n\r %x \n",addr);
sakthipriya 0:58b0c597a58c 66
sakthipriya 4:7992ea5e41ed 67 //initiating the data transfer
sakthipriya 4:7992ea5e41ed 68 ack0 = master.read(addr|1,data,length);
sakthipriya 4:7992ea5e41ed 69 //printf("\nready to receive\n");
sakthipriya 4:7992ea5e41ed 70
sakthipriya 0:58b0c597a58c 71 }
sakthipriya 4:7992ea5e41ed 72
sakthipriya 4:7992ea5e41ed 73 if(!ack0 )
sakthipriya 0:58b0c597a58c 74 {
sakthipriya 0:58b0c597a58c 75 printf("\n master has read %c from slave\n\r",*data);
sakthipriya 5:cb35b461fa29 76 //printf("\n \r %d %d %d %d %d\n",*data_reg,*status_reg,*c1_reg,*c2_reg,*freq_reg);
sakthipriya 0:58b0c597a58c 77 loopvariable0=false;
sakthipriya 0:58b0c597a58c 78 }
sakthipriya 0:58b0c597a58c 79 //master.stop();
sakthipriya 0:58b0c597a58c 80
sakthipriya 0:58b0c597a58c 81 //printf("done\n\r");
sakthipriya 0:58b0c597a58c 82 //delete data;
sakthipriya 0:58b0c597a58c 83 interrupt=0;
sakthipriya 0:58b0c597a58c 84 }
sakthipriya 0:58b0c597a58c 85
sakthipriya 0:58b0c597a58c 86 void T_I2C_MASTER_FSLAVE(void const *args)
sakthipriya 0:58b0c597a58c 87 {
sakthipriya 0:58b0c597a58c 88 char data_receive;
sakthipriya 0:58b0c597a58c 89 while(1)
sakthipriya 0:58b0c597a58c 90 {
sakthipriya 0:58b0c597a58c 91 Thread::signal_wait(0x1);
sakthipriya 0:58b0c597a58c 92 FUNC_I2C_MASTER_FSLAVE(&data_receive,1);
sakthipriya 0:58b0c597a58c 93 i2c_data * i2c_data_r = i2c_data_receive.alloc();
sakthipriya 0:58b0c597a58c 94 i2c_data_r->data = data_receive;
sakthipriya 0:58b0c597a58c 95 i2c_data_r->length = 1;
sakthipriya 0:58b0c597a58c 96 i2c_data_receive.put(i2c_data_r);
sakthipriya 1:e5c939440756 97 printf("\n Data received from slave is %c\n\r",data_receive);
sakthipriya 0:58b0c597a58c 98 i2c_data_receive.free(i2c_data_r);
sakthipriya 0:58b0c597a58c 99 }
sakthipriya 0:58b0c597a58c 100 }
sakthipriya 0:58b0c597a58c 101
sakthipriya 0:58b0c597a58c 102 void FUNC_INT()
sakthipriya 0:58b0c597a58c 103 {
sakthipriya 0:58b0c597a58c 104
sakthipriya 0:58b0c597a58c 105 ptr_t_i2c->signal_set(0x1);
sakthipriya 0:58b0c597a58c 106
sakthipriya 0:58b0c597a58c 107 }
sakthipriya 0:58b0c597a58c 108
sakthipriya 1:e5c939440756 109 char *writedata = new char;
sakthipriya 1:e5c939440756 110 void FUNC_MASTER_WRITE()
sakthipriya 1:e5c939440756 111 {
sakthipriya 1:e5c939440756 112 bool write2slave=true;
sakthipriya 0:58b0c597a58c 113
sakthipriya 0:58b0c597a58c 114 interrupt = 0;
sakthipriya 1:e5c939440756 115
sakthipriya 1:e5c939440756 116 char data = pc.getc();
sakthipriya 1:e5c939440756 117 i2c_data * i2c_data_s = i2c_data_send.alloc();
sakthipriya 1:e5c939440756 118 i2c_data_s->data = data;
sakthipriya 1:e5c939440756 119 i2c_data_s->length = 1;
sakthipriya 1:e5c939440756 120 i2c_data_send.put(i2c_data_s);
sakthipriya 1:e5c939440756 121 bool master_status_write = true;
sakthipriya 0:58b0c597a58c 122 interrupt = 1;
sakthipriya 1:e5c939440756 123 osEvent evt = i2c_data_send.get();
sakthipriya 1:e5c939440756 124 if (evt.status == osEventMail)
sakthipriya 1:e5c939440756 125 {
sakthipriya 1:e5c939440756 126 i2c_data *i2c_data_s = (i2c_data*)evt.value.p;
sakthipriya 1:e5c939440756 127 *writedata = i2c_data_s -> data;
sakthipriya 5:cb35b461fa29 128 //master.frequency(100000); //set clock frequency
greenroshks 3:7a895e0fdd45 129 while(write2slave && interrupt ==1)
sakthipriya 1:e5c939440756 130 {
sakthipriya 0:58b0c597a58c 131 printf("master clk freq setup and addressing slave\n\r");
sakthipriya 4:7992ea5e41ed 132 //master.start(); //initiating the data transfer
sakthipriya 0:58b0c597a58c 133 master_status_write = (bool) master.write(addr|0x00,writedata,1);
sakthipriya 0:58b0c597a58c 134 if(master_status_write==0)
sakthipriya 0:58b0c597a58c 135 {
sakthipriya 0:58b0c597a58c 136 printf("master has written %c to slave\n\r",*writedata);
sakthipriya 0:58b0c597a58c 137 write2slave=false;
sakthipriya 0:58b0c597a58c 138 }
sakthipriya 2:e80af3c366aa 139 i2c_data_send.free(i2c_data_s);
sakthipriya 5:cb35b461fa29 140 //printf("\n \r %d %d %d %d %d\n",*data_reg,*status_reg,*c1_reg,*c2_reg,*freq_reg);
sakthipriya 1:e5c939440756 141 }
sakthipriya 0:58b0c597a58c 142 }
sakthipriya 1:e5c939440756 143 }
sakthipriya 1:e5c939440756 144
sakthipriya 1:e5c939440756 145
sakthipriya 1:e5c939440756 146
sakthipriya 1:e5c939440756 147 int main()
sakthipriya 1:e5c939440756 148 {
sakthipriya 4:7992ea5e41ed 149 int i= 0;
sakthipriya 5:cb35b461fa29 150 master.frequency(100000);
sakthipriya 1:e5c939440756 151 ptr_t_i2c = new Thread(T_I2C_MASTER_FSLAVE);
sakthipriya 1:e5c939440756 152 data_ready.rise(&FUNC_INT);
sakthipriya 1:e5c939440756 153 printf("\nstarted master\n");
sakthipriya 4:7992ea5e41ed 154 //master.start();
sakthipriya 1:e5c939440756 155 while(1)
sakthipriya 1:e5c939440756 156 {
sakthipriya 1:e5c939440756 157 FUNC_MASTER_WRITE();
sakthipriya 2:e80af3c366aa 158
sakthipriya 0:58b0c597a58c 159 }
sakthipriya 0:58b0c597a58c 160 }