Access to LIS331DL gsensor chip
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From: Luispsc on 4 Mar 2010 08:15 Hi, all. Lately I've been trying to build a linux driver to an accelerometer chipset, LIS331DL, embedded to a certain motherboard. System's BIOS has not been updated as to fit current gsensors linux drivers in (communities releases and so). We are positive that the device naturally inputs/outputs info through very specific I/O ports, namely the 0x6C and 0x68 ones. The problem is that I am able to access the device data through those ports in Windows,but not in Linux. Moreover, there's no real datasheet to help us through. Here I have some few questions: 1) Is there, by any sort, a software kit which could possibly help us into diagnosing the motherboard as to provide more info about the device (LIS331DL accelerometer chip)? 2) Provided that there's already a windows driver that's fully functional and easily gets to send/retrieve data to/from the gsensor, under linux, the management of those same I/O would end into same results? In short, is there any difference between Linux and Windows I/ O ports access (logical and addressing shifts perhaps)? Any help would be much appreciated. Thanx in advance.
From: Lusotec on 4 Mar 2010 11:02 Luispsc wrote: > Lately I've been trying to build a linux driver to an accelerometer > chipset, LIS331DL, embedded to a certain motherboard. System's BIOS > has not been updated as to fit current gsensors linux drivers in > (communities releases and so). We are positive that the device > naturally inputs/outputs info through very specific I/O ports, namely > the 0x6C and 0x68 ones. The problem is that I am able to access the > device data through those ports in Windows,but not in Linux. Moreover, > there's no real datasheet to help us through. You probably already have the info in the links below but here they are anyway: http://www.st.com/stonline/products/families/sensors/motion_sensors/lis331dl.htm http://www.st.com/stonline/products/literature/ds/13951.pdf > Here I have some few questions: > > 1) Is there, by any sort, a software kit which could possibly help us > into diagnosing the motherboard as to provide more info about the > device (LIS331DL accelerometer chip)? A I2C or SPI reader/analiser may be of some help. These may be useful: http://www.lm-sensors.org/ http://www.lm-sensors.org/wiki/I2CTools > 2) Provided that there's already a windows driver that's fully > functional and easily gets to send/retrieve data to/from the gsensor, > under linux, the management of those same I/O would end into same > results? In short, is there any difference between Linux and Windows I/ > O ports access (logical and addressing shifts perhaps)? I don't think there is any difference on how Linux and Windows send/receive data in I2C but I have no development experience in that area. > Any help would be much appreciated. Thanx in advance. Regards.
From: Luispsc on 5 Mar 2010 13:37
On 4 mar, 13:02, Lusotec <nom...(a)nomail.not> wrote: > Luispsc wrote: > > Lately I've been trying to build a linux driver to an accelerometer > > chipset, LIS331DL, embedded to a certain motherboard. System's BIOS > > has not been updated as to fit current gsensors linux drivers in > > (communities releases and so). We are positive that the device > > naturally inputs/outputs info through very specific I/O ports, namely > > the 0x6C and 0x68 ones. The problem is that I am able to access the > > device data through those ports in Windows,but not in Linux. Moreover, > > there's no real datasheet to help us through. > > You probably already have the info in the links below but here they are > anyway:http://www.st.com/stonline/products/families/sensors/motion_sensors/l...http://www.st.com/stonline/products/literature/ds/13951.pdf > > > Here I have some few questions: > > > 1) Is there, by any sort, a software kit which could possibly help us > > into diagnosing the motherboard as to provide more info about the > > device (LIS331DL accelerometer chip)? > > A I2C or SPI reader/analiser may be of some help. > > These may be useful:http://www.lm-sensors.org/http://www.lm-sensors.org/wiki/I2CTools > > > 2) Provided that there's already a windows driver that's fully > > functional and easily gets to send/retrieve data to/from thegsensor, > > under linux, the management of those same I/O would end into same > > results? In short, is there any difference between Linux and Windows I/ > > O ports access (logical and addressing shifts perhaps)? > > I don't think there is any difference on how Linux and Windows send/receive > data in I2C but I have no development experience in that area. > > > Any help would be much appreciated. Thanx in advance. > > Regards. Thank you for your reply. I managed to successfully get access to the gsensor device. Hope any other won't face the problems I had to, but just in case, I will now provide feedback to my own questions: 1) Is there, by any sort, a software kit which could possibly help us into diagnosing the motherboard as to provide more info about the device (LIS331DL accelerometer chip)? Yes. A very good one called ECTOOL. Lookie -> http://www.coreboot.org/Ectool It probes the EC-RAM memory, which's quite a good start on taking notice on how the bits are behaving and, later on, making decisions on that! ;) 2) Provided that there's already a windows driver that's fully functional and easily gets to send/retrieve data to/from the gsensor, under linux, the management of those same I/O would end into same results? In short, is there any difference between Linux and Windows I/ O ports access (logical and addressing shifts perhaps)? Yes, same results. No difference. The gsensor got to output the same values (three-axial coordinates) as in windows. Hurray! |