main.cpp

00001 #include "mbed.h"
00002 
00003 DigitalOut led(LED1);
00004 Serial pc(USBTX,USBRX); //UART0 via OpenSDA
00005 I2CSlave i2c(I2C_SDA, I2C_SCL);
00006 int BUFFER_SIZE = 2;
00007 
00008 int main() {
00009     pc.baud(115200);
00010     pc.printf("%s\r\n", "ok");
00011     led = 0;
00012     char buf[BUFFER_SIZE];
00013     //pc.attach(pc_recv);
00014     i2c.frequency(400000);
00015     i2c.address(0x18);
00016     while(true) {
00017         for(int i = 0; i < BUFFER_SIZE; i++){
00018             buf[i] = 0;
00019         }
00020         switch (i2c.receive()) {
00021             case I2CSlave::ReadAddressed:
00022                 // Write back the buffer from the master
00023                 i2c.write(buf, BUFFER_SIZE);
00024                 pc.printf("Written to master (addressed): %s\r\n", buf);
00025                 break;
00026             case I2CSlave::WriteGeneral:
00027                 i2c.read(buf, BUFFER_SIZE);
00028                 pc.printf("Read from master (general): %s\r\n", buf);
00029                 break;
00030             case I2CSlave::WriteAddressed:
00031                 i2c.read(buf, BUFFER_SIZE);
00032                 pc.printf("Read from master (addressed): %d\r\n", buf[0]);
00033                 for(int i = 1; i < BUFFER_SIZE; i++){
00034                     pc.printf("%d ", buf[i]);
00035                 }
00036                 pc.printf("\r\n");
00037                 break;
00038         }
00039     }
00040 }