sakthi priya amirtharaj
/
slave_working1_1
i2c slave working version 1.1
Fork of slave_i2c3 by
main.cpp
- Committer:
- raizel_varun
- Date:
- 2014-12-12
- Revision:
- 6:8aea752c6eda
- Parent:
- 5:ce0bb4174ca4
- Child:
- 7:debeb7070a54
File content as of revision 6:8aea752c6eda:
#include "mbed.h" #include "rtos.h" void write_to_master(char); //function to write data to master Thread * ptr_t_i2c; I2CSlave slave(D14,D15); //configuring pins p27, p28 as I2Cslave Serial pc (USBTX,USBRX); InterruptIn interrupt(D9); DigitalOut data_ready(D10); int i2c_status=0; //read/write mode for i2c 0 : write2slave, 1 : write2master 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; int alpha; void FUNC_I2C_WRITE2CDMS(char *data, int length=1) { int slave_status = 1; while(slave_status) { slave.address(0x20); if(slave.receive()==1) { slave_status=slave.write(data,length); // printf("\n In the while loop\n"); /*if(!slave_status) { printf("slave wrote %c to master\n\r",*data); }*/ } else if(slave.receive()==3 || slave.receive()==2) { //i2c_data *i2c_data_r = i2c_data_receive.alloc(); slave_status=slave.read(data,length); /*if(!slave_status) { printf("1 read %c from master\n\r",*data); }*/ } //slave.stop(); } printf("2 done"); } void T_I2C_BAE(void const * args) { char data_send,data_receive; //data_send = 'a'; while(1) { Thread::signal_wait(0x1); printf("\nbdh\n"); //i2c_status=alpha; printf(" i2c status is %d " , i2c_status); if(i2c_status == 0) { FUNC_I2C_WRITE2CDMS(&data_receive); printf("\n i2c=0\n\r"); i2c_data * i2c_data_r = i2c_data_receive.alloc(); i2c_data_r->data = data_receive; i2c_data_r->length = 1; i2c_data_receive.put(i2c_data_r); printf("\n Data received from CDMS is %c\n",data_receive); } else if(i2c_status ==1 ) { osEvent evt = i2c_data_send.get(); if (evt.status == osEventMail) { i2c_data *i2c_data_s = (i2c_data*)evt.value.p; //printf("\nData read from CDMS is %c\n",i2c_data_r->data); data_send = i2c_data_s -> data; FUNC_I2C_WRITE2CDMS(&data_send); printf("\nData sent to CDMS is %c\n",data_send); i2c_data_send.free(i2c_data_s); i2c_status = 0; //delete i2c_data_r; } } } } void FUNC_INT() { // char * data = new char; //*data = 'a'; //printf("\blah\n"); ptr_t_i2c->signal_set(0x1); //delete data; } int main() { ptr_t_i2c = new Thread(T_I2C_BAE); char data='a'; interrupt.rise(&FUNC_INT); while(1) { //*(data_send)=pc.getc(); //FUNC_I2C_WRITE2CDMS(&data,1); //printf("\n The data send or received by slave is %c\n",data); //(data)++; //wait(1); //Remove the comments for receiving data /* osEvent evt = i2c_data_receive.get(); if (evt.status == osEventMail) { i2c_data *i2c_data_r = (i2c_data*)evt.value.p; printf("\nData read from CDMS is %c\n",i2c_data_r->data); i2c_data_receive.free(i2c_data_r); //delete i2c_data_r; }*/ //put in comments for receiving data data_ready=0; data = pc.getc(); printf(" %c ", data); i2c_status=1; printf(" %d ", i2c_status ); 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); // wait(0.5); alpha=i2c_status; data_ready=1; } }