It was an issues of time to build a 9-axis sensor in one chip, and Invense did it again.
http://invensense.com/mems/gyro/mpu9150.html
I read somewhere that people are working to build an Ardupilot with ARM CPU, so i'm thinking in image or video processing in a platform similar to Raspberry-PI, but this consumes 2.5W in Model A.
Specifications
| Model A | Model B | |
|---|---|---|
| Target price: | USD $25 | USD $35 |
| SoC: | Broadcom BCM2835 (CPU, GPU, DSP, and SDRAM) | |
| CPU: | 700 MHz ARM1176JZF-S core (ARM11 family) | |
| GPU: | Broadcom VideoCore IV, OpenGL ES 2.0, 1080p30 h.264/MPEG-4 AVC | |
| Memory (SDRAM): | 128 MiB (shared with GPU) | 256 MiB (shared with GPU) |
| USB 2.0 ports: | 1 | 2 (via integrated USB hub) |
| Video outputs: | Composite RCA, HDMI | |
| Audio outputs: | 3.5 mm jack, HDMI | |
| Onboard storage: | SD / MMC / SDIO card slot | |
| Onboard network: | None | 10/100 Ethernet (RJ45) |
| Low-level peripherals: | 8 × GPIO, UART, I²C bus, SPI bus with two chip selects, +3.3 V, +5 V, Ground | |
| Power ratings: | 500 mA (2.5 W) | 700 mA (3.5 W) |
| Power source: | 5 volt via MicroUSB or optional GPIO header | |
| Size: | 85.60 × 53.98 mm (3.370 × 2.125 in) | |
| Supported operating systems: | Debian GNU/Linux, Fedora, Arch Linux | |
Comments
Interesting, I have a new BeagleBone ($89) sitting on my desk and just waiting to try integrating the APM oilpan to it. 700Mhz is nice, but since you need a heavier OS... not so nice. Waiting for the Arduino Due....
The Pi is really nice for the price, but you're likely stuck with I2C--not many GPIOs or SPIs. And I2C may not be the best direction (i.e. the old Mikrokopter 'bus crashes' anyone?)
@Anish
interisting, what king of problem they are having?
@Sebastian Gralla
it's seem to be insignificant but each Watt should be save.
@Hugo Vincent
my mistake, fixed, thank you.
@Doug Weibel
You are right, from prototype or design to massive fabrication take its time.
Bases on the amount of time between when Invensense announced the 6000 series chips and when they were actually available, I wouldn't hold my breath...
Where does it say it has an ARM in the invensense chip? I can see it has a "DMP" which sounds like a microcontroller of some kind running the fusion algorithm, but afaict you'd still need a second microcontroller to run the autopilot code.
well, 2.5W on a quad is a very small consuption (you take about 150W to hover)
Getting hold of raspberrypi is a challenge, even very well connected folks from Cambridge (UK) community couldnt get hold of one..afaik