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| 03:17.47 | wing0 | hi |
| 03:18.01 | wing0 | anyone experienced with the CMSIS library? |
| 03:18.43 | roxfan | what's your question? |
| 03:20.01 | wing0 | i need some tutorial... i'm kinda lost trying to figure out what is implemented just looking at the sources |
| 03:21.28 | roxfan | well, CMSIS has only common stuff |
| 03:21.41 | roxfan | you also need headers specific to your chip |
| 03:22.24 | roxfan | what do you have? |
| 03:24.11 | wing0 | i have an LPC1768 |
| 03:24.43 | wing0 | i have download two versions of CMSIS, v2.0 and v1.3 |
| 03:25.21 | wing0 | v1.3 includes the board specif headers, but the other dont |
| 03:25.36 | roxfan | get this http://ics.nxp.com/support/documents/microcontrollers/zip/lpc17xx.cmsis.driver.library.zip |
| 03:25.43 | wing0 | i have that |
| 03:25.54 | roxfan | it includes implementations for all the hardware |
| 03:27.30 | wing0 | its just a matter of including the header files? (excluding all the compiler settings...) |
| 03:27.50 | roxfan | well, depends on what "it" is :) |
| 03:28.16 | roxfan | LPC17xx.h declares all (i think) hardware registers |
| 03:28.46 | roxfan | so you can just use that if you want to talk to hardware directly |
| 03:29.12 | roxfan | if you want to use some of the nxp's drivers you'll need to include their specific headers |
| 03:32.49 | wing0 | i think i got it.. but what about interruptions and interruption handlers? like in the example in the documentation... its not clear to me where are the definitions for the SysTick, for example |
| 03:33.09 | wing0 | and pin and led mapping... |
| 03:34.13 | roxfan | generally you just declare your handler as "void SysTick_Handler(void)" |
| 03:34.20 | roxfan | and linker will use it |
| 03:34.33 | roxfan | add extern "C" if it's a cpp file |
| 03:34.36 | wing0 | hmm, so its a default |
| 03:35.14 | roxfan | the ones provided in startup file are weak, so yours takes priority |
| 03:35.27 | roxfan | pin and led mapping is board-specific |
| 03:35.41 | roxfan | check schematics to which pins they're connected |
| 03:41.10 | wing0 | roxfan: thanks, you are being very helpful |
| 03:49.08 | wing0 | but.. the cmsis is not supposed to do that mapping for me? the datasheets only tell me about pin numbers... |
| 03:52.17 | roxfan | i don't see how cmsis would know about your exact processor and board layout |
| 04:01.26 | wing0 | i'm confused about, lets say, how to declare a pwm output pin...where should i look for the pin mappings? or i'm at a level where i should handle the pin registers by hand? |
| 04:02.55 | wing0 | maybe i'm having some conceptual problem |
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| 09:57.55 | cfrabel | hi all |
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| 20:08.24 | prpplague | GPSFan: greetings oh great sheepster! |
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| 20:36.47 | GPSFan | prpplague, howdy, sheep stuff done for now, extended a bit longer than planned ;>)) |
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