Search found 210 matches
- Tue Feb 05, 2013 11:34 am
- Forum: SPI and I2C
- Topic: i2c on PRO
- Replies: 38
- Views: 88720
Re: i2c on PRO
I am tring to set up a Maxim MAX519 DAC using SCL1, & SDA1 on an ARMmite PRO. I don't get an ACK(I2C_I21STAT = 0x08) from the hardware after I send a STA_ It might be a hardware problem, as this is all new hardware & software. Any comments on the code? Code in LPC210x.h "#define I2C_I2C1NSET (*(REG3...
- Mon Jan 28, 2013 3:25 am
- Forum: SPI and I2C
- Topic: I2C speeds
- Replies: 4
- Views: 18406
Re: I2C speeds
I need to set the clock speed for SCL1 on my PRO board. I have a funtion call !2CSPEED(400), but I don't think that applies to SCL1, only SCL0. I need to duplicate the function for SCL1, but I can't find the Source code.
Which module defines I2CSPEED?
Which module defines I2CSPEED?
- Sun Jan 27, 2013 2:05 am
- Forum: SPI and I2C
- Topic: I2COUT
- Replies: 1
- Views: 13884
Re: I2COUT
I need to set P(17) to SCL1, and P(18) to SDA1, then PINSEL1 to (PINSEL1 || 0x010100). I can't find where this is done.
Also, I probably need a new version of Libarm7 for the PRO. I still have the Armmite version.
Also, I probably need a new version of Libarm7 for the PRO. I still have the Armmite version.
- Fri Jan 25, 2013 6:11 pm
- Forum: SPI and I2C
- Topic: I2COUT
- Replies: 1
- Views: 13884
I2COUT
I'm trying to send a byte to an 8 bit DAC on the I2C bus from a PRO. I need to use P1(17), and P1(18) as SDA & SCL. Can I use I2COUT as is or can I modify the Function to use those pins?
- Fri Jan 25, 2013 11:08 am
- Forum: Kitchen sink
- Topic: PCLK
- Replies: 1
- Views: 6277
PCLK
I'm trying to measure the Period of an external Interrupt. It occurs as often as 1 msec. I read T0_CR0 and reset T0_TCR on each occurance. T0_PR is set to 0.
I need to know the rate of PCLK on my PRO board to calibrate the measurement.
I need to know the rate of PCLK on my PRO board to calibrate the measurement.
- Sun Jan 20, 2013 10:55 am
- Forum: Other Hardware interfaces
- Topic: Big Current Source
- Replies: 8
- Views: 19904
Re: Big Current Source
Chris,
Thanks!
I'll jumper P!(17) & P1(18) to IO(12) & IO(13). They are unused and will be tri-state. This way they will be available on the Prototype Shield thriugh the Header.
Thanks!
I'll jumper P!(17) & P1(18) to IO(12) & IO(13). They are unused and will be tri-state. This way they will be available on the Prototype Shield thriugh the Header.
- Sat Jan 19, 2013 12:00 pm
- Forum: Other Hardware interfaces
- Topic: Big Current Source
- Replies: 8
- Views: 19904
Re: Big Current Source
I have run into a problem. The I2C bus outputs are on PO(2), and PO(3). These are not available on the PRO or ARMmite boards.
The DAC that I have on order rquires SDA & SCL for the I2C data transfer.
The DAC that I have on order rquires SDA & SCL for the I2C data transfer.
- Thu Jan 17, 2013 9:03 pm
- Forum: Other Hardware interfaces
- Topic: Big Current Source
- Replies: 8
- Views: 19904
Re: Big Current Source
The parts that I selected are from Mouser. I'll try Digikey next. I have purchased from both in the past. I will look for another DAC, because the Mouser unit is a Dual and priced at $3.73 ea for 1 to 25 units. In the Dual DAC setup each DAC uses a seperate External Reference, since there are two DA...
- Thu Jan 17, 2013 1:02 pm
- Forum: Other Hardware interfaces
- Topic: Big Current Source
- Replies: 8
- Views: 19904
Re: Big Current Source
I'm looking at a Maxim MAX517ACPA DAC, and an NXP BUK75144-55A,127 for the MOSFET. I need through hole mounting for the DAC. I still need to identify a single supply Op Amp.
- Thu Jan 17, 2013 2:43 am
- Forum: Other Hardware interfaces
- Topic: Big Current Source
- Replies: 8
- Views: 19904
Re: Big Current Source
I was thinking along those lines. I'll ned an Op Amp that works on a single supply, and a way to mount & heat sink the FET, also a DIP or SIP DAC. I got my ARMmite board working. I cleaned the solder splashes and flux. I plan to use it to test my Interrupt Proceedure, but I'll do the job on the Pro ...