Search found 991 matches

by basicchip
Sun Feb 10, 2013 6:35 pm
Forum: SPI and I2C
Topic: P17 & P18
Replies: 2
Views: 7952

Re: P17 & P18

The inputs are not true open drain, but when properly configured for i2c use, they will only actively pull down, and the external user supplied pullups will bring levels to whatever the supply is. If that's 5V the high level will be within a few millivolts of 5V. You should not need any level shifte...
by basicchip
Fri Feb 08, 2013 1:28 pm
Forum: Software issues
Topic: WAIT(1) does not work, WAIT(0.1) does
Replies: 1
Views: 2518

Re: WAIT(1) does not work, WAIT(0.1) does

The parameter for WAIT is defined as an integer, so anything else is up to the conversion whims of the compiler.

You can always search for the definition in MakeItC
by basicchip
Thu Feb 07, 2013 7:33 pm
Forum: Software issues
Topic: MakeIt C Error "No Serial devices in the Registry"
Replies: 2
Views: 3135

Re: MakeIt C Error "No Serial devices in the Registry"

Our utilities query the registry for serial devices, which is how the download/debug connection is made. So either the USB dongle is not being recognized or is broken (check the Device manager for a USB-serial device) I have see other programs upset the driver for the FTDI USB serial device (this in...
by basicchip
Wed Feb 06, 2013 3:22 pm
Forum: SPI and I2C
Topic: i2c on PRO
Replies: 38
Views: 39494

Re: i2c on PRO

There is a diode on the 5V connection on the 6 pin connector for the USB dongle (this allows that connection while another power supply is connected). So for the DAC you will need to connect your ultimate power supply. Most likely it would work with voltage a litlle low for testing (not recommended ...
by basicchip
Wed Feb 06, 2013 5:10 am
Forum: SPI and I2C
Topic: i2c on PRO
Replies: 38
Views: 39494

Re: i2c on PRO

0xF9 is generally some unexpected error condition

I assume you do have pull ups on both i2c pins (generally 5K or less)
by basicchip
Thu Jan 31, 2013 11:42 pm
Forum: Software issues
Topic: UDP packet testing
Replies: 0
Views: 2861

UDP packet testing

We published this Visual BASIC app that exercises both serial and UDP packets that can be used with the ARMweb.
by basicchip
Wed Jan 30, 2013 1:04 am
Forum: Other Hardware interfaces
Topic: QEI and PWM Timers
Replies: 9
Views: 8574

Re: QEI and PWM Timers

QEI and timers are separate and should not interact, maybe what you are seeing is not the cause but an effect. How is the motor grounded (how are the MOSFET signal connections made)? The MOSFET GND (where all that motor current it going should NOT go through the same GND as the controller. If the MO...
by basicchip
Tue Jan 29, 2013 3:01 am
Forum: Other Hardware interfaces
Topic: QEI and PWM Timers
Replies: 9
Views: 8574

Re: QEI and PWM Timers

The Quadrature decoder is separate hardware from the Timers, so I'm not sure how they would interact

I need some more details on how you have them connected up, and what your program is doing.
by basicchip
Tue Jan 29, 2013 1:35 am
Forum: SPI and I2C
Topic: I2C speeds
Replies: 4
Views: 8870

Re: I2C speeds

I2CSPEED is in cor_bitbang.c

Have you ever used grep? There is a version installed with the MakeItC directory.

I allows you to search for text strings in files, and is used by the search in MakeItC, which is another way to find it.
by basicchip
Fri Jan 25, 2013 10:55 pm
Forum: Software issues
Topic: Oberon language support
Replies: 12
Views: 8179

Re: Oberon language support

Hey Chris Thanks for the update, if you want to get some PRO format boards, I can get you a couple with the new LPC1114 and LPC812 too. A board for the LPC4357 is in the works too. We can also save you some time on the ISP download code, which has of course changed again, but I do have it running on...