Using a TL866 and minipro software, he dumped the firmware, and started probing it with binwalk. So, he disassembled the speaker, located a flash chip next to the processor, and started hacking. got himself a Sven PS460 speaker with FM radio functionality, but didn’t like that the “power on” sound was persistently loud with no respect for the volume setting, and the low battery notification sounds were bothersome. HOWEVER, it seems that FRC controllers are more easily controlled using the "Servo" library, as in the earlier example.This might sound like a familiar problem – you get a Bluetooth speaker, and it sounds nice, but it also emits all kinds of weird sounds every now and then. This uses the standard "Servo" library which seems like the most likely way to go.Ī not-dissimilar project with example code: Here are some relevant examples from other projects and resources:Īn Arduino-controlled FRC motor controller project: Each successive channel uses the next listed pin. Button "on/off" inputs (for toggling channel state on/off): D8, D10, D11, D12 (must be configured to use internal pullup resistors, pinmode INPUT_PULLUP)Ĭhannels 1-4 are connected in pin order e.g., channel 1 corresponds to PWM pin D3, analog input A4, LED output A0, button D8.LED "channel on" outputs: A0, A1, A2, A3 (used as digital outputs).Analog inputs: pins A4, A5, A6, A7 (sliders connected to 5V/Gnd from Arduino, wiper contact connected to listed analog pins).PWM outputs: pins D3, D5, D6, D9 (all PWM capable: ).When a "down" direction is read (0 to 2.5V), the software shall set the output pulse width to a "reverse" value proportional to the position.When an "up" direction is read (2.5V to 5V), the software shall set the output pulse width to a "forward" value proportional to the position.When a center-detent (midrange) position is read (nominal 2.5V), the software shall set the output pulse width to a "stopped" value.When a channel is on, the software shall set the motor speed based on the analog inputs.(Typically, pulse width of 1000 to 2000uS, with 1500 corresponding to "stop", 2000 as full forward and 1000 as full reverse). The software shall set PWM channel outputs to the PWM pulse width needed to drive FRC standard motor controllers.The software shall ensure reliable button reading by debouncing the button inputs to prevent false triggers. Each time a button is pressed, the software shall toggle that channel between On and Off state.When connected to power, the software shall initially set all channels Off.Separate controllers are used for brushed/brushless to make it simple to hook up motors without having to reconfigure anything, and reduce the risk that someone will damage a motor by failing to reconfigure a controller. This is intended to be a simple, stand-alone apparatus that can run up to 2 brushed motors (from the Sparks) and 2 brushless motors (from the SparkMAX's). Power distribution, including automotive self-resetting breakers for the controllers, and a fuse for the Arduino board.This repository holds code for the Team 6328 "Motor Test Rig".
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