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manuferro
Joined: 10 Sep 2014, 14:57 Posts: 4
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I was able to connect 2 SD card. I was also able to comunicate to spidev (is enough) to install spidev driver and specify "spidev" in .modalias of spidevices. As attachment the code for 2sd cards.
I wish the fdtft devices. Definitely! I'm trying to write an driver for ili9341 because fdtft library is very complicated
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16 Sep 2014, 09:42 |
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Gerd
Joined: 04 May 2012, 08:55 Posts: 61
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16 Sep 2014, 11:35 |
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Giedrius
Joined: 11 Jun 2014, 14:45 Posts: 135
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16 Sep 2014, 12:25 |
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crackhe4d
Joined: 11 Jun 2014, 09:33 Posts: 27
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Hi together,
sorry, lots of things to do so that I wasn't able to write and/or test sth. last weekend. Apparently manuferro did the same modifications as me. Today I did some measurements with my logic analyzer. Seems to work well - CS (GPIO), CLK, MOSI was testet.
@Gerd: You wrote, that it's not a good idea to create a SPI commuication between Carambola and for example the MCP2515. I don't get why not. Where are the latency problems coming from? I tested the SPI Bus with 10MHz (8,4MHz in real), so there should be enough speed to get all the incoming data out of the MCP2515?!
Greetz, crackhe4d
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16 Sep 2014, 12:38 |
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Gerd
Joined: 04 May 2012, 08:55 Posts: 61
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16 Sep 2014, 14:54 |
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manuferro
Joined: 10 Sep 2014, 14:57 Posts: 4
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Attachments:
fbmem.c [45.89 KiB]
Downloaded 174 times
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17 Sep 2014, 10:38 |
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Gerd
Joined: 04 May 2012, 08:55 Posts: 61
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17 Sep 2014, 13:23 |
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crackhe4d
Joined: 11 Jun 2014, 09:33 Posts: 27
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Hi,
now I'm thinking about testing the mcp2515 with a mcp2551 and the carambola 2 board. On receiving a message from CAN, the MCP2515 drives low the /INT lane. Is there a possibility to check the signal on the carambola device without polling a gpio port? At the moment I've no idea how to do it from user space (like with a C program).
Greetz & thanks
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18 Sep 2014, 09:05 |
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Gerd
Joined: 04 May 2012, 08:55 Posts: 61
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18 Sep 2014, 09:17 |
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Gerd
Joined: 04 May 2012, 08:55 Posts: 61
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18 Sep 2014, 14:53 |
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