#define WHEEL_DIST 0.39912 // Measured: 0.252
#define PWM_BREAK INT16_MIN
#define STALL_LIMIT 140000
+#define I2C_TIMEOUT_DISABLE 255
#define TWI_ACK TWCR = (1<<TWINT) | (1<<TWEA) | (1<<TWEN) | (1<<TWIE)
#define TWI_NAK TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE)
static volatile uint8_t front_handicap=0;
static volatile uint8_t aft_handicap=0;
static volatile uint8_t error_state=0;
+static volatile uint8_t last_man_update_count=I2C_TIMEOUT_DISABLE;
ISR(TWI_vect)
{
tmp_angle.i = tmp_angle.i << 8 | TWDR;
cmd_vel.angle = tmp_angle.f;
cmd_vel.bUpdate = 1;
+ last_man_update_count = 0;
TWI_ACK;
break;
case 0x90: // Motor 1 switch
default:
TWI_NAK;
}
- ireg++;
+ if (ireg < 0xff) ireg++;
break;
case TW_ST_SLA_ACK: // start read
case TW_ST_DATA_ACK: // read
update_pid();
update_motor();
count_test++;
+ if (last_man_update_count != I2C_TIMEOUT_DISABLE) last_man_update_count++;
+
+ if (last_man_update_count > 100) {
+ // ~1s without a new i2c command
+ cmd_vel.speed = 0;
+ cmd_vel.angle = 0;
+ cmd_vel.bUpdate = 1;
+ last_man_update_count = I2C_TIMEOUT_DISABLE;
+ }
}
sleep_mode();