Post Created date
timing capture glitch with TC0 and TC2 forming 32bit timer
I just found out the way to fix the sync error. I need to change the PWM2 init code to pwm_channel2.CMR.calg = PWM_MODE_LEFT_ALIGNED; // Channel mode. pwm_channel2.CMR....
Tuesday, 7 April 2009 - 10:22
about INTC and interrupt registeration on UC3B
yes, thanks.
Tuesday, 31 March 2009 - 18:09
Writing speed to SD card.
aha! hehe, do you want to share your driver with us???
Sunday, 29 March 2009 - 08:23
Writing speed to SD card.
ok, so you use your own driver for your own card, not a general driver for every SD card, right?
Saturday, 28 March 2009 - 19:32
Writing speed to SD card.
1MB/s????!!!! What buffer size did you use in your file_write_buf()? or did you use file_write()?
Thursday, 26 March 2009 - 21:02
Writing speed to SD card.
at the moment I don't need to check for reading speed, but just want to have a good writing speed. I could check this in future.
Tuesday, 24 March 2009 - 21:40
Writing speed to SD card.
i just tried writing with 4KB everytime, and i sometimes still get about twice the normal execution time.
Tuesday, 24 March 2009 - 16:11
Writing speed to SD card.
but how can I know the size of SD card's internal buffer, so that I can just have the same execution time when I use file_write_buf() I tried to write 512 bytes every time I use...
Monday, 23 March 2009 - 13:22
Writing speed to SD card.
and i just found out that the file_write_buf() function I used to write a 1GB microSD card has a variable execution time, sometime it could take several times more to finish. This...
Monday, 23 March 2009 - 09:33
Writing speed to SD card.
250KB/s with 12MHz SPI??? wow, that's faster than mine. mine is about 300KB/s with 24MHz SPI
Monday, 23 March 2009 - 08:56
Writing speed to SD card.
i tried with my UC3B design with SPI running at 24MHz to 1GB SD card, and I got about 1MB write in 3.4 seconds.
Saturday, 21 March 2009 - 13:59
very strange thing about UC3B internal pull ups for TWI
ok, but now with 10K my TWI works, I get correct reading all the time.
Saturday, 21 March 2009 - 12:27