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tantanatan
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Diff: main.cpp
- Revision:
- 0:fc82140da5f9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue Jan 20 16:59:30 2015 +0000 @@ -0,0 +1,134 @@ +#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 slave_intrpt(D9); + +DigitalOut master_intrpt(D10); + +int i2c_status=0; //read/write mode for i2c 0 : write2slave, 1 : write2master +int reset=0; +int temp; + + +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; + + +void FUNC_I2C_WRITE2CDMS(char *data, int length=1) +{ + int slave_status = 1; + + while(slave_status && slave_intrpt == 1) + { + slave.address(0x20); + // volatile unsigned char *reg = (unsigned char*)0x40067000; + //printf(" %d \n", *reg ); + if(slave.receive()==1) + { + slave_status=slave.write(data,length); + + + } + else if(slave.receive()==3 || slave.receive()==2) + { + slave_status=slave.read(data,length); + } + break; + + } + //printf("\ndone\n\r"); + +} + +void T_I2C_BAE(void const * args) +{ + char data_send,data_receive; + Thread::signal_wait(0x1); + //i2c_status = temp; + //wait(0.5); + //printf("\n entered thread\n\r"); + if(i2c_status == 0 ) + { + + FUNC_I2C_WRITE2CDMS(&data_receive); + i2c_data * i2c_data_r = new i2c_data; + //USE i2c_data_r fo various operations + //printf("\n Data received from CDMS is %c\n\r",data_receive); + // This has to be done from a differen thread + + } + else if(i2c_status ==1) + { + + if (1==1) + { + FUNC_I2C_WRITE2CDMS(&data_send); + //printf("\nData sent to CDMS is %c\n\r",data_send); + + i2c_status = 0; + //temp = i2c_status; + } + } + + +} + +void FUNC_INT() +{ + reset = 0; + ptr_t_i2c->signal_set(0x1); + +} + +void FUNC_RESET() +{ + reset = 1; +} + +void ir2master() +{ + + char data='a'; + master_intrpt=0; + data = pc.getc(); + reset =0; + i2c_status=1; + master_intrpt=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); + + //temp = i2c_status; +} + + + + +int main() +{ + printf("\n slave started\n\r"); + + ptr_t_i2c = new Thread(T_I2C_BAE); + + slave_intrpt.rise(&FUNC_INT); + while(1) + { + ir2master(); + + } + +} + + +