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SSD1306 c source for avr i2c?
A couple of days ago I asked about availability of some SSD1306 c source for an avr. It turns out that the stuff I had downloaded had the letters VPORT in it, and my message was...
Friday, 18 January 2013 - 02:36
Whats a VPORT?
I got the adafruit oled with a ssd1306. The sw was all c++. Then I got the xmega protolab c source for the ssd1306 but its for an xmega evidently. I think its a clever way to talk...
Tuesday, 15 January 2013 - 20:44
How many usecs between rx ints at 230400?
Lets say I'm receiving back to back chars at 230400. 44usec per char. Lets say the interrupt, grab and reti takes 1usec. So the sender starts sending. 44usecs later the avr...
Thursday, 10 January 2013 - 01:14
Algo to estimate rms volts from half wave rectified volts?
Wiki-p says half wave rectified sine wave vrms is vpk/2 and vavg is vpk/pi. My experimental results show that the rms of some music rides about 3dB above the average, but these...
Monday, 31 December 2012 - 16:19
Arduino bootloader bypass?
I hope you dont ban me for asking this question. It sort of has something to do with AVRs. After I unplug the usb and plug it back in in the uno, I see the rx and tx leds flash. I...
Monday, 10 December 2012 - 04:44
Xmega with 3.3V core and 5V IO?
Would this be a Good Idea for an Xmega model? It would let you use 5V external chips and LEDs. I guess if this is a Bad Idea and has already been discussed and rejected, what was...
Sunday, 2 December 2012 - 17:06
Anyone used Infineon BTS5242 hi side switch?
Link to ds: http://www.infineon.com/dgdl/BTS... Trying to understand how the Current Limit Adjust works. I want it to work like a lab power supply. Set it for 7 amps and it limits.
Wednesday, 28 November 2012 - 04:13
Mega2560 with signature of a 328P?
I got an arduino mega2560. Chip says 2560. Tried to burn a simple program in it with avrdude, avrdude says signature isnt the one for a 2560. Its the one for a mega328. How could...
Wednesday, 14 November 2012 - 22:37
HMC5883 3 axis magnetometer?
After much fiddling I am able to read and write to the registers in this thing, and I can adjust the gain params and print out the x,y and z numbers. I can calc atan(y/x) and...
Sunday, 11 November 2012 - 18:04
P FletcherJones I2C bitbang?
Mr FletcherJones wrote this I2C.c file. It ships with the imagecraft compiler in the examples dir. Using it to read an HMC5883 3 axis compass. Trying anyway. His example reads an...
Friday, 9 November 2012 - 01:33
AVRdude bat file dont work [Fixed Loose nut behind keyboard]
I have a bat file that programs my uno: @rem file avrdude.bat Nov 1 12 Bob G for magheightsensor avrdude -c arduino -P com16 -b 115200 -p ATmega328P -U flash:w:magheightsensor.hex...
Sunday, 4 November 2012 - 04:21
Anyone have a subroutine to read an LT1867 16 bit spi a/d?
It uses a 7 bit cmd byte. I assume I have to shift it 1 bit left before sending it out the spi.
Tuesday, 30 October 2012 - 03:12