+static int8_t
+robotsim_i2c_ballboard_set_mode(struct i2c_cmd_ballboard_set_mode *cmd)
+{
+ char buf[BUFSIZ];
+ int len;
+
+ ballboard.mode = cmd->mode;
+ len = snprintf(buf, sizeof(buf), "ballboard=%d\n", cmd->mode);
+ hostsim_lock();
+ write(fdw, buf, len);
+ hostsim_unlock();
+ return 0;
+}
+
+int8_t
+robotsim_i2c_cobboard_set_mode(uint8_t mode)
+{
+ char buf[BUFSIZ];
+ int len;
+
+ if (cobboard.mode == mode)
+ return 0;
+
+ cobboard.mode = mode;
+ len = snprintf(buf, sizeof(buf), "cobboard=%d\n", mode);
+ hostsim_lock();
+ write(fdw, buf, len);
+ hostsim_unlock();
+ return 0;
+}
+
+static int8_t
+robotsim_i2c_ballboard(uint8_t addr, uint8_t *buf, uint8_t size)
+{
+ void *void_cmd = buf;
+
+ switch (buf[0]) {
+ case I2C_CMD_BALLBOARD_SET_MODE:
+ {
+ struct i2c_cmd_ballboard_set_mode *cmd = void_cmd;
+ robotsim_i2c_ballboard_set_mode(cmd);
+ break;
+ }
+
+ default:
+ break;
+ }
+ return 0;
+}
+
+static int8_t
+robotsim_i2c_cobboard(uint8_t addr, uint8_t *buf, uint8_t size)
+{
+ // void *void_cmd = buf;
+
+ switch (buf[0]) {
+#if 0 /* deleted */
+ case I2C_CMD_COBBOARD_SET_MODE:
+ {
+ struct i2c_cmd_cobboard_set_mode *cmd = void_cmd;
+ robotsim_i2c_cobboard_set_mode(cmd);
+ break;
+ }
+#endif
+ default:
+ break;
+ }
+ return 0;
+}
+
+int8_t
+robotsim_i2c(uint8_t addr, uint8_t *buf, uint8_t size)
+{
+ if (addr == I2C_BALLBOARD_ADDR)
+ return robotsim_i2c_ballboard(addr, buf, size);
+ else if (addr == I2C_COBBOARD_ADDR)
+ return robotsim_i2c_cobboard(addr, buf, size);
+ return 0;
+}
+