sakthi priya amirtharaj
master working version 1.1
Revision 0:58b0c597a58c, committed 2014-12-13
- Comitter:
- sakthipriya
- Date:
- Sat Dec 13 11:24:36 2014 +0000
- Commit message:
- master working
Changed in this revision
diff -r 000000000000 -r 58b0c597a58c main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sat Dec 13 11:24:36 2014 +0000
@@ -0,0 +1,135 @@
+#include "mbed.h"
+#include "rtos.h"
+
+const int addr = 0x20; //slave address
+I2C master (D14,D15); //configure pins p27,p28 as I2C master
+Serial pc (USBTX,USBRX);
+DigitalOut interrupt(D9);
+InterruptIn data_ready(D10);
+
+int reset;
+
+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;
+
+Thread * ptr_t_i2c;
+void FUNC_I2C_MASTER_FSLAVE(char * data,int length)
+{
+ //printf("press backspace for master to start \n\r");
+ //while(1){
+ //interrupt = 0;
+ // if(pc.getc()=='z'){
+ wait(0.5);
+ interrupt = 1;
+ printf("\nMaster executed\n");
+
+
+ bool ack0 =true;
+ bool loopvariable0 =true;
+ //char *data = new char;
+ //*data = 'b';
+
+
+
+ master.frequency(100000); //set clock frequency
+ //master.start();
+ /*while(write2slave)
+ { *writedata = pc.getc();
+ wait(0.5);
+
+ printf("master clk freq setup and addressing slave\n\r");
+ master.start(); //initiating the data transfer
+ master_status_write = (bool) master.write(addr|0x00,writedata,1);
+ if(master_status_write==0)
+ {
+ printf("master has written %c to slave\n\r",*writedata);
+ write2slave=false;
+ }
+
+
+ }*/
+
+ while(ack0)
+ {
+ //printf("2 master clk freq setup and addressing slave\n\r");
+
+ master.start(); //initiating the data transfer
+ ack0 = master.read(addr,data,length);
+ }
+ if(!ack0)
+ {
+ printf("\n master has read %c from slave\n\r",*data);
+ loopvariable0=false;
+ }
+ //master.stop();
+
+ //printf("done\n\r");
+ //delete data;
+ interrupt=0;
+}
+
+void T_I2C_MASTER_FSLAVE(void const *args)
+{
+ char data_receive;
+ while(1)
+ {
+ Thread::signal_wait(0x1);
+ FUNC_I2C_MASTER_FSLAVE(&data_receive,1);
+ 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);
+ }
+}
+
+void FUNC_INT()
+{
+
+ ptr_t_i2c->signal_set(0x1);
+
+}
+
+
+
+
+int main()
+{
+ ptr_t_i2c = new Thread(T_I2C_MASTER_FSLAVE);
+
+ data_ready.rise(&FUNC_INT);
+ printf("\nstarted master\n");
+ bool write2slave;
+ char *writedata = new char;
+
+
+ bool master_status_write = true;
+ while(1)
+ { write2slave=true;
+ interrupt = 0;
+
+ *writedata = pc.getc();
+
+ interrupt = 1;
+ master.frequency(100000); //set clock frequency
+ while(write2slave)
+ {
+ printf("master clk freq setup and addressing slave\n\r");
+ master.start(); //initiating the data transfer
+ master_status_write = (bool) master.write(addr|0x00,writedata,1);
+ if(master_status_write==0)
+ {
+ printf("master has written %c to slave\n\r",*writedata);
+ write2slave=false;
+ }
+ }
+
+ }
+}
\ No newline at end of file
diff -r 000000000000 -r 58b0c597a58c mbed-rtos.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Sat Dec 13 11:24:36 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-rtos/#f1ef95efa5ad
diff -r 000000000000 -r 58b0c597a58c mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sat Dec 13 11:24:36 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5 \ No newline at end of file