I2CSlave test program. I2CSlave library has some improper behavior, so this program is able to watch that. The workaround for this behavior, only for NXP device, is wrote in 'I2CSlave_mod_NXP.cpp'.
First, write this program to the microcontroller which you want to check. Second, send I2C data to the microcontroller from the other one. Anything is enough for the transmission data, but the data length is made 8, 9, 10 and 11 bytes and confirm each reply.
main.cpp
- Committer:
- oks486
- Date:
- 2016-04-15
- Revision:
- 0:7b78d1eee006
- Child:
- 1:bd94bb3170b6
File content as of revision 0:7b78d1eee006:
#include "mbed.h" I2CSlave slave(dp5, dp27); // sda, scl Serial serial(dp16, dp15); // tx, rx DigitalOut led(LED1); // indicator int main() { led = 0; serial.baud(115200); char buf[10]; slave.address(0x80); while(1) { int i = slave.receive(); switch (i) { case I2CSlave::ReadAddressed: //slave.write(msg, strlen(msg) + 1); // Includes null char led = 0; break; case I2CSlave::WriteGeneral: //slave.read(buf, 10); //printf("Read G: %s\n", buf); led = 0; break; case I2CSlave::WriteAddressed: if (slave.read(buf, 10) == 0) { // success serial.printf("Read success. DATA: %s\n", buf); led = 1; } else { // failure serial.printf("Read failure. DATA: %s\n", buf); led = 0; } break; } for(int i = 0; i < 10; i++) buf[i] = 0; // Clear buffer } }