sakthi priya amirtharaj
/
i2c_std_alone
i2c stand alone working
Fork of slave_working_obama by
main.cpp
- Committer:
- greenroshks
- Date:
- 2015-01-26
- Revision:
- 13:fe24dd810078
- Parent:
- 12:f6b6954b65d6
- Child:
- 14:67cebba9c452
File content as of revision 13:fe24dd810078:
#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); InterruptIn master_reset(D11); DigitalOut data_ready(D10); int i2c_status=0; //read/write mode for i2c 0 : write2slave, 1 : write2master int reset=0; int temp; Timer t; Timer t2; 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; unsigned char* add_reg = (unsigned char*)0x40067000; unsigned char* data_reg = (unsigned char*)0x40067004; unsigned char* status_reg = (unsigned char*)0x40067003; unsigned char* c1_reg = (unsigned char*)0x40067002; unsigned char* c2_reg = (unsigned char*)0x40067005; unsigned char* freq_reg = (unsigned char*)0x40067001; int receive_status =0; void FUNC_I2C_WRITE2CDMS(char *data, int length=1) { int slave_status = 1; // printf("\nData is %c\n\r",*data); //wait_ms(10); if(interrupt ==1) { //wait(2); //printf("\nin int loop\n"); //t.stop(); //t2.start(); receive_status = slave.receive(); //t2.stop(); //printf("\n%d\n",receive_status); t.stop(); //printf("\n status %d \n",receive_status); if( receive_status==1) { // printf("\nslave receive b4: \n"); //t.stop(); //t2.start(); slave_status=slave.write(data,length); t2.stop(); // printf("\nData sent to CDMS is %c\n\r",*data); // printf("\n\r write"); //printf("\nslave receive after: %d \n",slave.receive()); } else if( receive_status==3 || receive_status==2) { //t.stop(); //printf("\nh\n"); slave_status=slave.read(data,length); } //printf("\n \r done while loop %d \n",slave.receive()); //printf("\n\r ahoy drhghhhhhhhhhhh\n"); // printf("\n\r %d %d %d %d %d \n",*data_reg,*status_reg,*c1_reg,*c2_reg,*freq_reg); } printf("\n%f\r",t.read()); t.reset(); printf("\n%d\r",t2.read_us()); t2.reset(); //printf("\n%f\r",t.read()); } void T_I2C_BAE(void const * args) { char data_send,data_receive; while(1) { Thread::signal_wait(0x1); //i2c_status = temp; //wait(0.5); printf("\n entered thread\n\r"); if(i2c_status == 0 ) //receiving data from cdms { FUNC_I2C_WRITE2CDMS(&data_receive); 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\r",data_receive); i2c_data_receive.free(i2c_data_r); // This has to be done from a differen thread } else if(i2c_status ==1 ) //sending data to cdms { osEvent evt = i2c_data_send.get(); if (evt.status == osEventMail) { i2c_data *i2c_data_s = (i2c_data*)evt.value.p; data_send = i2c_data_s -> data; //printf("\n1.Data is %c\n\r",data_send); FUNC_I2C_WRITE2CDMS(&data_send); printf("\nData sent to CDMS is %c\n\r",data_send); i2c_data_send.free(i2c_data_s); i2c_status = 0; //temp = i2c_status; } } data_ready=0; } } void FUNC_INT() { //reset = 0; t.start(); ptr_t_i2c->signal_set(0x1); } void ir2master() { char data='a'; //data_ready=0; data = pc.getc(); reset =0; i2c_status=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); data_ready=1; //temp = i2c_status; } int main() { printf("\n slave started\n\r"); slave.address(0x20); ptr_t_i2c = new Thread(T_I2C_BAE); interrupt.rise(&FUNC_INT); while(1) { ir2master(); } }