Taidacent TTL to CAN Bus Converter (STM32f103c8t6) User Manual

1. المقدمة

This module converts a TTL signal into a CAN signal, simplifying data transmission for embedded systems. It eliminates the need to learn complex CAN protocols, thereby shortening development cycles and reducing costs. The module supports both 3.3V and 5V power supplies and features semi-hole technology for easy integration into various systems. It is equipped with a 32-bit ARM processor and a CAN level shifting chip, offering 14 sets of masking filters with five frame filtering methods each. Parameters are configured via simple AT commands, with only 6 instructions required. Its wide baud rate range enhances network adaptability.

2. مواصفات المنتج

• المعالج: ARM processor with Cortex M3 core for enhanced data processing and lower power consumption. Integrated CAN controller for efficient transmission.
• مزود الطاقة: Compatible with 5V and 3.3V power supplies, featuring an LDO linear regulator.
• يمكن معدل الباود: Supports 3Kbps to 1Mbps, fully compliant with CAN bus 2.0A and 2.0B specifications.
• معدل باود المنفذ التسلسلي: Supports 4800bps to 460800bps.
• Sampling Point: Automatically adjusted to or near the CIA value.
• تصفية: 14 sets of 32-bit shielding filters, freely configurable.
• إعدادات: Parameters set via AT commands and saved after power down.
• سرعة نقل البيانات: Over 600 frames per second.
• استعادة: Offline self-recovery function.
• الإعدادات الافتراضية: Hardware and software restore default parameters.
• Message Data Length: 0-8 bytes, arbitrarily settable.
• حماية: Includes surge protection circuit to suppress transient interference.
• مؤشر الحالة: LED indicator shows 1 Hz in communication mode and 5 Hz in configuration mode.
• ملاحظة التوافق: The serial port is TTL 3.3V signal; not compatible with 232 signal. A 5V to 3.3V circuit is recommended for interfacing with 5V systems.

3. الإعداد والاتصالات

Proper connection of the module is essential for correct operation. Refer to the pinout diagram and descriptions below for guidance.

الشكل 3.1: Pinout diagram of the Taidacent TTL to CAN Bus Converter module, highlighting connection points.

أوصاف الدبوس:

• 5V: Connect to a 5V power supply.
• 3.3V: Connect to a 3.3V power supply.
• أرض الواقع: Connect to power ground.
• سي اف جي: Configuration pin. Set to 0 for configuration mode, 1 for working mode.
• تكسد: Connect to the RXD pin of your target board (e.g., STM32).
• آر إكس دي: Connect to the TXD pin of your target board (e.g., STM32).
• CANL: Connect to the CANL signal line of the CAN network.
• CANH: Connect to the CANH signal line of the CAN network.

ملاحظة هامة: The serial port of this module operates with a TTL 3.3V signal. It is not compatible with 232 signals. If integrating with a 5V system, it is strongly recommended to use a 5V to 3.3V level shifter circuit to prevent damage to the module or target board.

الشكل 3.2: قمة view of the module, showing the STM32 microcontroller and other components.

الشكل 3.3: قاع view of the module, indicating pin labels for connection.

4. تعليمات التشغيل

4.1 طرق التشغيل

• وضع التكوين: Set the CFG pin to 0. In this mode, the module accepts AT commands for parameter setup. The status indicator LED will flash at 5 Hz.
• وضع العمل: Set the CFG pin to 1. In this mode, the module performs TTL to CAN signal conversion. The status indicator LED will flash at 1 Hz.

4.2 تكوين أوامر AT

The module's parameters, such as CAN baud rate, serial port baud rate, and filter settings, are configured using a set of simple AT commands. There are only 6 instructions to manage the module's settings. These settings are saved automatically after power down, ensuring persistent configuration.

For detailed AT command syntax and usage, refer to the specific programming guide or datasheet provided by Taidacent (not included in this manual).

4.3 نقل البيانات

Once configured and in working mode, the module facilitates high-speed data transfer between TTL serial and CAN bus interfaces. It supports data transfer speeds exceeding 600 frames per second. The message data length can be set arbitrarily from 0 to 8 bytes.

5. الصيانة

The Taidacent TTL to CAN Bus Converter module is designed for reliable operation with minimal maintenance. To ensure longevity and optimal performance:

• احرص على إبقاء الوحدة نظيفة وخالية من الغبار والرطوبة.
• تجنب تعريض الوحدة لدرجات الحرارة أو الرطوبة الشديدة.
• Ensure proper ventilation if enclosed in a casing.
• Handle with care to prevent physical damage to components or solder joints.

6. استكشاف الأخطاء وإصلاحها

• لا اتصال:
  • Verify all power and signal connections (5V, 3.3V, GND, TXD, RXD, CANL, CANH) are secure and correct as per Section 3.
  • Ensure the CFG pin is set correctly for the desired mode (0 for configuration, 1 for working).
  • Check that the serial port of your target board is indeed TTL 3.3V. If it's a 5V system, confirm a level shifter is used.
  • Confirm baud rates (serial and CAN) are correctly configured and match the connected devices.
• Incorrect LED Indicator Behavior:
  • If the LED is not flashing as expected (1 Hz in working mode, 5 Hz in configuration mode), recheck the CFG pin setting and power supply.
• الوحدة غير مستجيبة:
  • The module features offline self-recovery. Disconnect and reconnect power to attempt a reset.
  • You can restore hardware and software default parameters if configuration issues persist. Refer to the AT command documentation for the specific command to reset to factory defaults.
• تلف البيانات/الأخطاء:
  • Verify CAN bus termination resistors are correctly implemented in your network, if applicable.
  • Check for electrical noise or interference in the environment. The module has surge protection, but extreme conditions can still affect performance.

7. المواصفات

8. الضمان والدعم

Specific warranty information for the Taidacent TTL to CAN Bus Converter (STM32f103c8t6) is not provided in this manual. For details regarding warranty coverage, technical support, or further assistance, please contact Taidacent directly or refer to their official website. You may also reach out to the retailer from whom the product was purchased.

Manufacturer: Taidacent