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  Topic: Timer based Real Time Clock (RTC)
ktallevi

Replies: 57
Views: 563130

PostForum: Code Library   Posted: Thu Jul 22, 2010 6:24 pm   Subject: Timer based Real Time Clock (RTC)
Has anyone modified this to count milliseconds as well?

thanks
  Topic: Bluetooth Stack on PIC?
ktallevi

Replies: 1
Views: 3999

PostForum: General CCS C Discussion   Posted: Mon Jul 20, 2009 7:56 am   Subject: Bluetooth Stack on PIC?
Has anyone tried porting a Bluetooth stack to the PIC18/24/32?

There is a lightweight version at http://www.sm.luth.se/~conny/lwbt/ which looks like it could be ported.

thanks.
  Topic: PIC16F688 soft UART RX issue
ktallevi

Replies: 3
Views: 4950

PostForum: General CCS C Discussion   Posted: Mon Jul 13, 2009 8:08 pm   Subject: PIC16F688 soft UART RX issue
The other device I am interfacing to is also 3.3v, but your right , I should put a pull-up resistor on that pin for when nothing is connected.

If I move the soft-serial port to a different set of p ...
  Topic: PIC16F688 soft UART RX issue
ktallevi

Replies: 3
Views: 4950

PostForum: General CCS C Discussion   Posted: Mon Jul 13, 2009 6:07 pm   Subject: PIC16F688 soft UART RX issue
I have tested the following code on ISIS simulator and it works fine. But when I test it on a bread board fgetc gets triggered (with nothing attached to the serial port), and all the data is 0x00.

...
  Topic: UART RX in low power mode
ktallevi

Replies: 3
Views: 5932

PostForum: General CCS C Discussion   Posted: Thu Nov 13, 2008 12:01 pm   Subject: UART RX in low power mode
Ttelmah, as you can see in my code, I am not putting the PIC to sleep, just switching to the Timer1 clock.

I am using a hardware UART, and the timer1 clock is 4 times the 9600 bitrate. So I should ...
  Topic: UART RX in low power mode
ktallevi

Replies: 3
Views: 5932

PostForum: General CCS C Discussion   Posted: Thu Nov 13, 2008 10:55 am   Subject: UART RX in low power mode
I am having a rather odd issue. I have a 38.4Khz crystal connected to Timer1. I switch from the main 48Mhz osc to the timer1 crystal to save power. A character coming in on the UART will wake up the P ...
  Topic: Converting a unix time stamp
ktallevi

Replies: 5
Views: 10923

PostForum: General CCS C Discussion   Posted: Tue Oct 21, 2008 12:49 pm   Subject: Converting a unix time stamp
Does CCS have any built-in functions to convert a unix time stamp to something usable.

Eg. 685586AC (hex) -> 16:05:00 June 20 2025

thanks.
  Topic: fprint quotes question
ktallevi

Replies: 4
Views: 4991

PostForum: General CCS C Discussion   Posted: Fri Aug 22, 2008 11:27 am   Subject: fprint quotes question
I want to send out a string over the serial port enclosed in quotes.

Using printf(""test""); wont work as the compiler complains about the double quotes.

Any ideas?

thanks ...
  Topic: SD 4-bit Mode driver needed
ktallevi

Replies: 0
Views: 2552

PostForum: General CCS C Discussion   Posted: Fri Jul 18, 2008 9:07 am   Subject: SD 4-bit Mode driver needed
Has anyone written a driver for SD cards using 'SD 4 bit mode'? I have seen SPI drivers and examples, but not SD 4 bit mode.

thanks!
  Topic: SD Card Init problem
ktallevi

Replies: 3
Views: 5006

PostForum: General CCS C Discussion   Posted: Fri May 30, 2008 12:51 pm   Subject: SD Card Init problem
After further examination it turns out there is only 1.7v coming out of the Data-out pin from the SD card. I have as 100k pull-up resistor to 3.3v. All the other connections on the SD card that have p ...
  Topic: SD Card Init problem
ktallevi

Replies: 3
Views: 5006

PostForum: General CCS C Discussion   Posted: Fri May 30, 2008 10:40 am   Subject: SD Card Init problem
I double checked all the hardware, I am not making any of the common mistakes you had mentioned.

Perhaps these cards, which per purchased recently do not support SPI mode. I could try to use 1 bit ...
  Topic: SD Card Init problem
ktallevi

Replies: 3
Views: 5006

PostForum: General CCS C Discussion   Posted: Fri May 30, 2008 9:20 am   Subject: SD Card Init problem
I am attempting to use the ex_fat.c sample from CCS with a microSD card. All the connections are wired up correctly to the SPI port. I have 100k pull up resistors on DI, DO, and CS lines.

During th ...
  Topic: PIC18F87J50 USB osc configuration options
ktallevi

Replies: 1
Views: 3802

PostForum: General CCS C Discussion   Posted: Mon May 12, 2008 2:44 pm   Subject: PIC18F87J50 USB osc configuration options
Im implementing USB in a mobile device. Using the PLL would draw too much current so I was hoping to just use a 24MHz crystal without the PLL enabled.

If I understand the datasheet correctly, I can ...
  Topic: USB example code, high RAM usage
ktallevi

Replies: 4
Views: 4587

PostForum: General CCS C Discussion   Posted: Thu May 01, 2008 8:27 am   Subject: USB example code, high RAM usage
thanks guys, RAM usage is down to %15, exactly what I needed!
  Topic: USB example code, high RAM usage
ktallevi

Replies: 4
Views: 4587

PostForum: General CCS C Discussion   Posted: Thu May 01, 2008 7:26 am   Subject: USB example code, high RAM usage
So I took the sample ex_usb_hid program (from version 4.068), and compiled it for the PIC18F87J50.

RAM usage is at %75! This does not leave much room for the rest of my application as it requires ...
 
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