Chaitanya Viswa / Mbed 2 deprecated frdm_i2c_master

gen master public

Dependencies:   mbed

Fork of freemaster3_1 by Chaitanya Viswa

main.cpp@0:cdc20d6056de, 2014-12-05 (annotated)

Committer:
viswachaitanya
Date:
Fri Dec 05 10:35:38 2014 +0000
Revision:
0:cdc20d6056de
gen free frdm master(mas write to slave and read from slave)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
viswachaitanya 0:cdc20d6056de 1 #include "mbed.h"
viswachaitanya 0:cdc20d6056de 2
viswachaitanya 0:cdc20d6056de 3 const int addr = 0x20; //slave address
viswachaitanya 0:cdc20d6056de 4 I2C master (D14,D15); //configure pins p27,p28 as I2C master
viswachaitanya 0:cdc20d6056de 5 Serial pc (USBTX,USBRX);
viswachaitanya 0:cdc20d6056de 6 void main()
viswachaitanya 0:cdc20d6056de 7 {
viswachaitanya 0:cdc20d6056de 8 printf("press backspace for master to start \n\r");
viswachaitanya 0:cdc20d6056de 9 while(1){
viswachaitanya 0:cdc20d6056de 10 if(pc.getc()==8){
viswachaitanya 0:cdc20d6056de 11 bool master_status_write = true;
viswachaitanya 0:cdc20d6056de 12 bool master_status_read = true;
viswachaitanya 0:cdc20d6056de 13 char* data_send = new char;
viswachaitanya 0:cdc20d6056de 14 *data_send = 'b';
viswachaitanya 0:cdc20d6056de 15 char *data_rec = new char;
viswachaitanya 0:cdc20d6056de 16 *data_rec = 'b';
viswachaitanya 0:cdc20d6056de 17 bool write_loop = true;
viswachaitanya 0:cdc20d6056de 18 bool read_loop = true;
viswachaitanya 0:cdc20d6056de 19 while(write_loop){
viswachaitanya 0:cdc20d6056de 20 printf("2 master clk freq setup and addressing slave\n\r");
viswachaitanya 0:cdc20d6056de 21 master.frequency(100000); //set clock frequency
viswachaitanya 0:cdc20d6056de 22 master.start(); //initiating the data transfer
viswachaitanya 0:cdc20d6056de 23 master_status_write = (bool) master.write(addr|0x00,data_send,1);
viswachaitanya 0:cdc20d6056de 24 if(!master_status_write){
viswachaitanya 0:cdc20d6056de 25 printf("3 master has written %c to slave\n\r",*data_send);
viswachaitanya 0:cdc20d6056de 26 write_loop=false;
viswachaitanya 0:cdc20d6056de 27 }
viswachaitanya 0:cdc20d6056de 28 }
viswachaitanya 0:cdc20d6056de 29 printf("done\n\r");
viswachaitanya 0:cdc20d6056de 30
viswachaitanya 0:cdc20d6056de 31
viswachaitanya 0:cdc20d6056de 32 while(read_loop){
viswachaitanya 0:cdc20d6056de 33 printf("4 master clk freq setup and addressing slave\n\r");
viswachaitanya 0:cdc20d6056de 34 master.frequency(100000); //set clock frequency
viswachaitanya 0:cdc20d6056de 35 master.start(); //initiating the data transfer
viswachaitanya 0:cdc20d6056de 36 master_status_read = (bool) master.read(addr,data_rec,1);
viswachaitanya 0:cdc20d6056de 37 if(!master_status_read){
viswachaitanya 0:cdc20d6056de 38 printf("5 master has read %c from slave\n\r",*data_rec);
viswachaitanya 0:cdc20d6056de 39 read_loop=false;
viswachaitanya 0:cdc20d6056de 40 }
viswachaitanya 0:cdc20d6056de 41 }
viswachaitanya 0:cdc20d6056de 42 printf("done\n\r");
viswachaitanya 0:cdc20d6056de 43 }
viswachaitanya 0:cdc20d6056de 44 }
viswachaitanya 0:cdc20d6056de 45 }