LeafLabs Garden » Topic: 24lc256 and Wire library

LeafLabs Garden » Topic: 24lc256 and Wire library http://forums.leaflabs.com/topic.php?id=679 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:12:30 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://forums.leaflabs.com/search.php trunet on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-5642 Tue, 12 Jul 2011 22:39:34 +0000 trunet 5642@http://forums.leaflabs.com/ well I think I duplicate this post :( sorry for that redfox74 on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3915 Wed, 16 Mar 2011 14:55:41 +0000 redfox74 3915@http://forums.leaflabs.com/ Hi Perry, i check your code ... i have all the problem because i use high density micro ... that i know and now i try to use the i2c2 i2c1 don't can see if it work but i think that it work on maple ... i tested it on maple v5 1 week ago ... So I see that inside the code there're some infinite loop and that is not good ... because if you have some problem on device you freeze the program ... could be better if you put inside a time out .. Do you have some suggestions about the i2c on second i2c2 channel ? I need to pull up the pin ? I need to set the pinmode as output for sda and scl port ? I need to add rcc for that device ? Now don't work i see only a glitch on sda a and clock is a 0 level .. don't see any signal. Best Roberto Xavier on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3908 Wed, 16 Mar 2011 08:14:37 +0000 Xavier 3908@http://forums.leaflabs.com/ Thanks a lot Perry, It works now :-) I thought that the pins defined in i2c_dev1 (6 and 7 in i2c.c) were the ones i had to plug my eeprom.... I missed something. Is 64 bytes the maximum length of data during a transfer ? I tried with more and i get weird results. Anyway, i'll cut my data in several pieces and can go ahead. Thanks again, Xavier perry on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3901 Tue, 15 Mar 2011 18:49:53 +0000 perry 3901@http://forums.leaflabs.com/ Xavier, Yes, sorry. I turned off the USB in the last commit while I was testing to minimize other things going off in the chip. The latest push should reenable them, so you can flash it. It only works with I2C1, pins 5 (SCL) and pins 9 (SDA). You also need external pullups, since those outputs are open drain. I will add a timeout. The speed is currently fixed at 100khz standard mode, but I will make it configurable. Xavier on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3897 Tue, 15 Mar 2011 16:51:11 +0000 Xavier 3897@http://forums.leaflabs.com/ Thanks, now it compiles. But i cannot make it work: i've changed the slave_address because my 24LC256 is wired to '000'. I plugged it to SDA 7 and SCL 6. But it freezes my maple. I cannot even flash it anymore. I have to use the "perpetual boot loader" trick. BTW, the doc <a href="http://leaflabs.com/docs/i2c.html" rel="nofollow">http://leaflabs.com/docs/i2c.html</a> says other pins for the i2c1. That would be great to have a kind of timeout in the i2c functions so that it returns with an error if something wrong happens. Is it possible to try the communication at 10Khz ? Thanks, Xavier perry on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3859 Fri, 11 Mar 2011 00:52:49 +0000 perry 3859@http://forums.leaflabs.com/ hi xavier, try again. I just pushed some changes. I didn't have time to add anything but at least it should compile now and write/read to the 24LC2556. -perry anton on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3853 Wed, 09 Mar 2011 22:45:32 +0000 anton 3853@http://forums.leaflabs.com/ It can be 60 or so. Xavier on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3850 Wed, 09 Mar 2011 12:09:35 +0000 Xavier 3850@http://forums.leaflabs.com/ Hi Perry, Thanks for you help but... same problem. I have also this error when downloading the full branch here : <a href="https://github.com/leaflabs/libmaple/tree/i2c-wip" rel="nofollow">https://github.com/leaflabs/libmaple/tree/i2c-wip</a> In what file is supposed to be this NR_INTERRUPTS constant? Xavier perry on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3849 Wed, 09 Mar 2011 11:36:45 +0000 perry 3849@http://forums.leaflabs.com/ Hi Xavier, I'm not sure how you checked out the branch. Try this: <pre><code>git fetch git checkout i2c-wip git reset --hard origin/i2c-wip make clean make</code></pre> Xavier on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3847 Wed, 09 Mar 2011 09:20:50 +0000 Xavier 3847@http://forums.leaflabs.com/ Anton, Perry, I'm new to git but i cannot figure out what i do wrong : <blockquote> $ git checkout i2c-wip Switched to branch 'i2c-wip' $ make ================================================================================ Build info: BOARD: maple MCU: STM32F103RB MEMORY_TARGET: flash See 'make help' for all possible targets ================================================================================ [CC] ./libmaple/adc.c [CC] ./libmaple/bkp.c [CC] ./libmaple/dac.c [CC] ./libmaple/dma.c [CC] ./libmaple/exti.c [CC] ./libmaple/flash.c [CC] ./libmaple/fsmc.c [CC] ./libmaple/gpio.c [CC] ./libmaple/iwdg.c [CC] ./libmaple/nvic.c libmaple/nvic.c: In function 'nvic_init': libmaple/nvic.c:108: error: 'NR_INTERRUPTS' undeclared (first use in this function) libmaple/nvic.c:108: error: (Each undeclared identifier is reported only once libmaple/nvic.c:108: error: for each function it appears in.) make: *** [build/./libmaple/nvic.o] Error 1 </blockquote> anton on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3842 Tue, 08 Mar 2011 04:04:01 +0000 anton 3842@http://forums.leaflabs.com/ Xavier, to compile you should use libmaple files from i2c-wip branch. Perry, can you add I2Cx_ER_IRQHandler which will just send stop on AF condition? Xavier on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3840 Tue, 08 Mar 2011 03:03:50 +0000 Xavier 3840@http://forums.leaflabs.com/ Thanks Perry, I wanted to give a try to your library but it does not compile : libmaple/nvic.c: In function 'nvic_init': libmaple/nvic.c:108: error: 'NR_INTERRUPTS' undeclared (first use in this function) libmaple/nvic.c:108: error: (Each undeclared identifier is reported only once libmaple/nvic.c:108: error: for each function it appears in.) Then PCLK1 is also undeclared... As i don't really need performance for my 24LC256 access, i thought i could use the software/synchronized current version of i2c. Anyway... no problem, take your time to clean the code and merge this into the master branch ;-) Xavier perry on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3839 Tue, 08 Mar 2011 00:49:32 +0000 perry 3839@http://forums.leaflabs.com/ Hi Xavier, I have some development code you can try here: <a href="https://github.com/leaflabs/libmaple/tree/i2c-wip" rel="nofollow">https://github.com/leaflabs/libmaple/tree/i2c-wip</a> If you look at main.cpp, you'll see a basic example of reading and writing to the 24LC256. I will clean up the code and merge it into the master branch this week. If you wait until then I can help you then. -perry Xavier on "24lc256 and Wire library" http://forums.leaflabs.com/topic.php?id=679#post-3837 Mon, 07 Mar 2011 16:14:33 +0000 Xavier 3837@http://forums.leaflabs.com/ Hello, Has anyone managed to have a communication with a EEPROM 24lc256 with the current libmaple version using the Wire object ? Are these methods supposed to work to write and read to/from the 24lc ? <a href="http://pastebin.com/f3a36644b" rel="nofollow">http://pastebin.com/f3a36644b</a> All i read is '0'.... same as if i unplug the chip. Thanks a lot for any help, Xavier