I'm dealing with a thermal camera FLIR Lepton3.
I made it work with SPI0 but I'm facing some problems with I2C port.
I plugged my breakout board SDA/SCL to pins P9.20 and P9.19.
In the code there is LEP_OpenPort( mCciPort, LEP_CCI_TWI, 400,
&mCciConnPort ) and CCI supposed to be I2C.
Actually the camera is detected by Linux because:
debian@beaglebone:~/Lepton3_BBB/build/opencv_demo$ i2cdetect -r 2
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-2 using read byte commands.
I will probe address range 0x03-0x77.
Continue? [Y/n]
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- 2a -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- UU UU UU UU -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
And 0x2a is the Lepton I2C, but LEP_OpenPort() returns -108 (not OK).
I already configured pins:
> config-pin P9.19 i2c
> config-pin P9.20 i2c
When I run the code my dmesg is full of:
[ 3118.287621] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3119.295640] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3120.303726] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3121.311678] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3122.319767] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3123.327715] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3124.335735] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3125.343752] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3126.351771] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3127.359789] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3128.367807] omap_i2c 4802a000.i2c: timeout waiting for bus ready
[ 3129.375826] omap_i2c 4802a000.i2c: timeout waiting for bus ready
Even if that's bus 1 but in the code I'm calling bus 2.
In boot dmesg there is:
[ 1.617253] omap_i2c 44e0b000.i2c: could not find pctldev for node
/ocp/l4_wkup@44c00000/scm@210000/pinmux@800/pinmux_i2c0_pins, deferring
probe
[ 1.618196] omap_i2c 4802a000.i2c: bus 1 rev0.11 at 100 kHz
[ 1.619511] omap_i2c 4819c000.i2c: bus 2 rev0.11 at 100 kHz
Where could be the problem? Maybe something related to pullup resistors?
Thank you :)
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