DIYEFI.org Forum

Basic Coding Milestones (Somewhat in order of precedence) #1 Boot/Debug Dump predefined variables via serial <- basic testing interface Reboot microprocessor on demand (trivial) Respond via VGA/NTSC terminal to serial commands <- reduces need for a laptop later Generate constant data stream when pr...

Fred wrote:

Peter wrote:Just out of curiosity have you used the PropellerGCC yet?

Propeller just got WAY more attractive! Cool

The best part is it has standard C libraries, so it acts more like Linux than just a plain old microprocessor.

http://propgcc.googlecode.com/hg/doc/Library.html

I like though hole stuff better also. I do use quite a few breakout boards for things that don't come in diy type packages. As far as the fets go it's pretty much 6 of one half a dozen of the other. I'm also not a fan of the LM1815. http://forum.diyefi.org/viewtopic.php?f=5&t=1531 Just out of c...

Firmware tasks The following tasks have to be performed by the processor. The load can be spread out across 8 x 20 MIPS cores and 16 hardware timers. Monitor ignition power Track statistics and save in EEPROM (more on this later) Monitor 2 pulse input channels for engine speed and output shaft spee...

Starting to do some visualisations. Note that it is 35 C here today. I spent all day pulling wire and bending conduit in a mechanical room. Yuck.

I'd probably run the solenoids off a VND14NV04, because I have some sitting around not doing anything. You might need an op amp or something similar to shift the voltage to something higher than 3.3V. I never tried to use a PWM on the Propeller. You might consider something like a MCZ33800. It supp...

Yep, Propeller again. When you don't have to worry about microsecond timing it can all be done in the interpreted language instead of assembly. Makes it pretty easy.

My downfall is I rarely get the hardware sorted enough to do some serious coding.

3-4 Shift Solenoid Controlled by on/off current drain. 25-40 Ohms resistance. Engages at closed throttle at 25-28 mph. Disengages at closed throttle below 25 mph. Disabled when OD switch is off. Disabled at wide open throttle. Disabled when temp < 0.5 C (30 F) Disabled when temp > 126 C (260 F) Ena...

Transmission Specifications Gear Ratio ---------------- 1 2.74 2 1.54 3 1.00 4 (OD) 0.69 R 2.21 Fluid: ATF+3 Governor Pressure, Solenoid PWM, Pressure Sensor Feedback Speed (MPH) Governor (PSI) Sensor (V) Solenoid (V) Solenoid (PWM%) -----------------------------------------------------------------...

Stock I/O Configuration On/Off Solenoids (25-40 Ohms) 3-4 Upshift Torque Convertor Lockup Transmission Relay PWM Solenoid (3-5 Ohms) Governor Pressure (operates at 512 Hz) Analog Sensors Transmission Temperature (1000 Ohms @ 70 F) Governor Pressure (0-5 Volts 0-125 PSIA) Pulse Input Output Shaft Sp...