Hands-On: XCP Communication Setup

/* XcpBasic configuration header — typical development ECU settings */

/* Transport: XCP on CAN */
#define XCP_TRANSPORT_CAN
#define XCP_CAN_CHANNEL         0         /* CAN controller 0 */
#define XCP_CAN_MASTER_ID       0x600UL   /* CRO ID (tool → ECU) */
#define XCP_CAN_SLAVE_ID        0x601UL   /* DTO ID (ECU → tool) */
#define XCP_CAN_BAUDRATE        500000UL

/* Protocol configuration */
#define XCP_MAX_CTO             8         /* command object size: 8 bytes (CAN) */
#define XCP_MAX_DTO             8         /* data transfer object size: 8 bytes */
#define XCP_SEED_KEY_ENABLED    0         /* disable seed/key for development */
#define XCP_PAGE_PROCESSOR      1         /* enable page switching support */

/* Calibration memory: working page in RAM, reference in Flash */
#define XCP_WORKING_PAGE_ADDR   0x20001000UL
#define XCP_WORKING_PAGE_SIZE   0x8000UL  /* 32 KB calibration RAM */
#define XCP_REFERENCE_PAGE_ADDR 0x00010000UL
#define XCP_REFERENCE_PAGE_SIZE 0x8000UL  /* 32 KB calibration Flash */

/* DAQ configuration */
#define XCP_MAX_DAQ_LISTS       16
#define XCP_MAX_ODT_PER_DAQ     8
#define XCP_MAX_ODT_ENTRIES     256

# CANape COM API: verify DAQ session produces data at correct rate
import canape_com as canape
import time

app = canape.OpenApplication("ECU_Engine.cfg")
device = app.GetDevice("ECU_Engine")
device.Open()

# Create measurement task with 3 signals at 10ms
meas = device.CreateMeasurementList()
meas.AddSignal("engine_rpm",    event="event_10ms")
meas.AddSignal("coolant_temp",  event="event_100ms")
meas.AddSignal("lambda_actual", event="event_10ms")

# Start and record 5 seconds
app.StartMeasurement()
time.sleep(5.0)
app.StopMeasurement()

# Verify sample rates from MF4 file
recording = canape.LoadRecording("last_recording.mf4")
for sig in ["engine_rpm", "lambda_actual"]:
    samples = recording.GetSignal(sig)
    rate_hz = len(samples) / 5.0
    assert 90 <= rate_hz <= 110, f"{sig}: expected ~100 Hz, got {rate_hz:.1f} Hz"
    print(f"{sig}: {rate_hz:.0f} Hz — OK")