Analisador OBD de nova geração
Publicado em Edição 91, Outubro 2009
Estamos trazendo agora, uma versão melhorada do Analisador OBD publicado em 2007. Desta vez, inserimos um display gráfico, um microcontrolador Cortex M3 e uma interface de usuário Open Source, a próxima geração do analisador OBD2 autônomo da Elektor constitui um novo padrão para os projetos OBD2 de fabricação caseira.
Atualizações, Informação Extra
Features
Hardware Handheld Analyser: • Full graphics display 132 x 32 pixels • RGB backlighting • Convenient four press button control • Power supply taken from onboard diagnostics port (12 V car battery) • Uses standard OBD cable • Convenient size (126 mm wide x 68 mm tall x 25 mm deep) • Weight approx. 110 g
Hardware and software DX module (DXM-PCB): • Hardware for onboard OBD2 control • Firmware for onboard OBD2 control • 3V3 tx-rx level • Cortex M3 CPU (32-bit controller) • 72 MHz internal clock rate • Onboard 3V3 power supply for external device – max. 55mA • Jumperless • Bootloader • LED indicators for onboard Connect and Data Stream • Analogue battery voltage measurement • AT control set • Supports all currently implemented protocols: PWM, VPWM, ISO9141-2, ISO14230-4 (KWP2000), ISO15765-4 (CAN, 11/29 Bit , 250/500 kBaud) • Firmware update via ISP interface • Rapid OBD connection
Open Source firmware functions: • Graphical user control interface display • Selection of vehicle data, PID list, error code list, VIN, MIL status • Selection menu for active transmission control system (for vehicles with multiple transmission options, e.g. automatic gearbox) • Saved error store (freeze-frames) for previous faults • Expandable memory bank for sample error codes • Erasable error store • Live display of sensor data • Acoustic signals • Selection menu for scan mode (automatic or manual) • Menu text in English • Choice of direction (rotatable through 180 degrees) • Controllable RGB backlight brightness • Battery voltage measurement
Expansion options: • USB port for data transfer or supporting use with PC • Real-time clock (RTC) for data recording (e.g. time and date stamping) • Adequate checklist flash memory (1, 2 or 4 MByte) for data logging functions
Open Source: • Open Source firmware for the controller • ISP interfaces accessible for AT90CAN128 and AT90USB162 • Other firmware can be substituted if required • Demo firmware for ‘Speedometer with warning functions’
|
Carregue aqui para baixar o ficheiro PDF deste artigo da revista Elektor.
Atenção! Devido à complexidade dos mercados internacionais, a Elektor não pode garantir a disponibilidade de todos os componentes deste projeto.
|