*pt-get install build-essential *
*In 3.8.x spidev2.0 could be used on spi1, but with 4.1.x+ the "first" is
spidev1 (even if spi1 over spi0..) > *
* SPIDevice *busDevice = new SPIDevice(2,0); //Using second SPI bus (both
loaded)*
*The code is trying to open /dev/spidev2.0, but it's not there*
*This should be your first worry-> open("/dev/spidev2.0", O_RDWR) = -1
ENOENT (No such file or directory)*
Find out why your system thinks this file does not exist. As in perhaps it
doesn't because you need to load a device tree file as mike mentioned
above. But also as stated above, there can be many reasons why your
application does not think this file exists.
So did you tell the BBB to load the spidev interface???
PS.. "4.1.12-ti-r29" was way before i fixed spi/dma.. So you really
should upgrade: (unless you only plan to send 159 bytes over spi)
cd /opt/scripts/tools/
git pull
sudo ./update_kernel.sh --ti-rt-channel --lts-4_1
cd ~/
git clone https://github.com/
<https://github.com/beagleboard/bb.org-overlays> --depth=1
cd ./bb.org-overlays
./dtc-overlay.sh
./install.sh
Then:
sudo sh -c "echo 'cape_enable=bone_capemgr.
>> /boot/uEnv.txt"
*Here is an update of the steps performed ...*
*1) I did an update on **apt-get install build-essential*
*2) Change code from ... **SPIDevice *busDevice = new SPIDevice(2,0)*
* to* *SPIDevice *busDevice = new SPIDevice(1,0)*
*3) Updated kernel and ./dtc overlay*
*OUTCOME: The SPIDEV2.0 problem went away – unfortunately shortly
thereafter my BBB would no longer connect with ssh [email protected]
<[email protected]>. I therefore reloaded back to what I started with
originally as below.*
*Linux beaglebone 4.1.12-ti-r29 #1 SMP PREEMPT Mon Nov 9 22:46:19 UTC 2015
armv7l GNU/Linux*
*Linux version 4.1.12-ti-r29 (root@a5-imx6q-wandboard-2gb) (gcc version
4.9.2 (Debian 4.9.2-10) ) #1 SMP PREEMPT Mon Nov 9 22:46:19 UTC 2015*
*BeagleBoard.org Debian Image 2015-11-12*
*When I set out again to run natively on my BBB the error changed from ...*
*SPI: SPI_IOC_MESSAGE Failed: Bad file descriptor *
*to *
*SPI: SPI_IOC_MESSAGE Failed: Invalid argument *
*and the SPIDEV2.0 of course went away with libEBBLibrary.so loading and
SPIDEV1.0 now loading. That said there still remains to be a number of
directories that are still missing. I am taking this latest error as a sign
of progress, but I have yet to resolve it. I also should mention that I
ruled out my laptop, and loading the same configuration on my clunker with
the same outcome. Here is latests strace ... For brevity I removed portions
of it because it repeats itself at nauseum.*
*SPI: SPI_IOC_MESSAGE Failed: Invalid argument*
root@beaglebone:~/exploringBB/chp09/LCDcharacter# ls
LCDApp LCDApp.cpp LCDProb build build_static
root@beaglebone:~/exploringBB/chp09/LCDcharacter# strace ./LCDApp
execve("./LCDApp", ["./LCDApp"], [/* 19 vars */]) = 0
brk(0) = 0x8b9000
uname({sys="Linux", node="beaglebone", ...}) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb6f4d000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=26752, ...}) = 0
mmap2(NULL, 26752, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb6f46000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp/libEBBLibrary.so",
O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp", 0xbea86370) = -1 ENOENT
(No such file or directory)
open("/lib/arm-linux-gnueabihf/tls/v7l/neon/libEBBLibrary.so",
O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/arm-linux-gnueabihf/tls/v7l/neon", 0xbea86370) = -1 ENOENT (No
such file or directory)
open("/lib/arm-linux-gnueabihf/tls/v7l/vfp/libEBBLibrary.so",
O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/arm-linux-gnueabihf/tls/v7l/vfp", 0xbea86370) = -1 ENOENT (No
such file or directory)
open("/lib/arm-linux-gnueabihf/tls/v7l/libEBBLibrary.so",
O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/arm-linux-gnueabihf/tls/v7l", 0xbea86370) = -1 ENOENT (No such
file or directory)
open("/lib/arm-linux-gnueabihf/tls/neon/vfp/libEBBLibrary.so",
O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/linux-gnueabihf/tls/neon/vflib/armp", 0xbea86370) = -1 ENOENT (No
such file or directory)
open("/lib/arm-linux-gnueabihf/tls/neon/libEBBLibrary.so",
O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/arm-linux-gnueabihf/tls/neon", 0xbea86370) = -1 ENOENT (No
such file or directory)
open("/lib/arm-linux-gnueabihf/tls/vfp/libEBBLibrary.so",
O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat64("/lib/arm-linux-gnueabihf/tls/vfp", 0xbea86370) = -1 ENOENT (No such
file or directory)
*open("/lib/arm-linux-gnueabihf/tls/libEBBLibrary.so", O_RDONLY|O_CLOEXEC)
= -1 ENOENT (No such file or directory)*
open("/usr/lib/libEBBLibrary.so", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0`m\0\0004\0\0\0"...,
512) = 512
lseek(3, 95252, SEEK_SET) = 95252
read(3,
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
1200) = 1200
lseek(3, 63425, SEEK_SET) = 63425
read(3, "A2\0\0\0aeabi\0\1(\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 51)
= 51
fstat64(3, {st_mode=S_IFREG|0644, st_size=96452, ...}) = 0
mmap2(NULL, 128964, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb6f08000
mprotect(0xb6f17000, 65536, PROT_NONE) = 0
mmap2(0xb6f27000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xb6f27000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/usr/lib/arm-linux-gnueabihf/libstdc++.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0 n\4\0004\0\0\0"...,
512) = 512
lseek(3, 656784, SEEK_SET) = 656784
read(3,
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
1280) = 1280
lseek(3, 656208, SEEK_SET) = 656208
read(3, "A2\0\0\0aeabi\0\1(\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 51)
= 51
fstat64(3, {st_mode=S_IFREG|0644, st_size=658064, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb6f45000
mmap2(NULL, 749256, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb6e51000
mprotect(0xb6eed000, 61440, PROT_NONE) = 0
mmap2(0xb6efc000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x9b000) = 0xb6efc000
mmap2(0xb6f02000, 24264, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6f02000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/arm-linux-gnueabihf/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0h<\0\0004\0\0\0"...,
512) = 512
lseek(3, 405976, SEEK_SET) = 405976
read(3,
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
1160) = 1160
lseek(3, 405640, SEEK_SET) = 405640
read(3, "A4\0\0\0aeabi\0\1*\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 53)
= 53
fstat64(3, {st_mode=S_IFREG|0644, st_size=407136, ...}) = 0
mmap2(NULL, 471184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb6ddd000
mprotect(0xb6e40000, 61440, PROT_NONE) = 0
mmap2(0xb6e4f000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x62000) = 0xb6e4f000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/arm-linux-gnueabihf/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\230\321\0\0004\0\0\0"...,
512) = 512
lseek(3, 99900, SEEK_SET) = 99900
read(3,
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
1120) = 1120
lseek(3, 99568, SEEK_SET) = 99568
read(3, "A2\0\0\0aeabi\0\1(\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 51)
= 51
fstat64(3, {st_mode=S_IFREG|0644, st_size=101020, ...}) = 0
mmap2(NULL, 165160, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb6db4000
mprotect(0xb6dcd000, 61440, PROT_NONE) = 0
mmap2(0xb6ddc000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0xb6ddc000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/arm-linux-gnueabihf/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0Mw\1\0004\0\0\0"...,
512) = 512
lseek(3, 899996, SEEK_SET) = 899996
read(3,
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
2880) = 2880
lseek(3, 896548, SEEK_SET) = 896548
read(3, "A4\0\0\0aeabi\0\1*\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\3\f"..., 53) =
53
fstat64(3, {st_mode=S_IFREG|0755, st_size=902876, ...}) = 0
mmap2(NULL, 972200, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb6cc6000
mprotect(0xb6d9f000, 61440, PROT_NONE) = 0
mmap2(0xb6dae000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xd8000) = 0xb6dae000
mmap2(0xb6db1000, 9640, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6db1000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/arm-linux-gnueabihf/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0EQ\0\0004\0\0\0"...,
512) = 512
lseek(3, 100684, SEEK_SET) = 100684
read(3,
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
1520) = 1520
lseek(3, 65940, SEEK_SET) = 65940
read(3, "A4\0\0\0aeabi\0\1*\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 53)
= 53
fstat64(3, {st_mode=S_IFREG|0755, st_size=102204, ...}) = 0
mmap2(NULL, 139836, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb6ca3000
mprotect(0xb6cb3000, 61440, PROT_NONE) = 0
mmap2(0xb6cc2000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xb6cc2000
mmap2(0xb6cc4000, 4668, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6cc4000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb6f44000
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb6f43000
set_tls(0xb6f434c0, 0xb6f50050, 0xb6f43bb8, 0xb6f434c0, 0xb6f50050) = 0
mprotect(0xb6dae000, 8192, PROT_READ) = 0
mprotect(0xb6cc2000, 4096, PROT_READ) = 0
mprotect(0xb6e4f000, 4096, PROT_READ) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb6f42000
mprotect(0xb6efc000, 16384, PROT_READ) = 0
mprotect(0xb6f4f000, 4096, PROT_READ) = 0
munmap(0xb6f46000, 26752) = 0
set_tid_address(0xb6f43068) = 586
set_robust_list(0xb6f43070, 12) = 0
rt_sigaction(SIGRTMIN, {0xb6ca7d9d, [], SA_RESTORER|SA_SIGINFO,
0xb6cecae1}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0xb6ca7cbd, [], SA_RESTORER|SA_RESTART|SA_SIGINFO,
0xb6cecae1}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0
futex(0xb6f06ce8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6f06cdc, FUTEX_WAKE_PRIVATE, 2147483647) = 0
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb6f4c000
write(1, "Starting EBB LCD Character Displ"..., 43Starting EBB LCD
Character Display Example
) = 43
brk(0) = 0x8b9000
brk(0x8da000) = 0x8da000
open("/dev/spidev1.0", O_RDWR) = 3
ioctl(3, 0x40016b01, 0x8b901c) = 0
ioctl(3, 0x80016b01, 0x8b901c) = 0
ioctl(3, 0x40046b04, 0x8b9024) = 0
ioctl(3, 0x80046b04, 0x8b9024) = 0
ioctl(3, 0x40016b03, 0x8b9020) = 0
ioctl(3, 0x80016b03, 0x8b9020) = 0
ioctl(3, 0x40046b04, 0x8b9024) = 0
ioctl(3, 0x80046b04, 0x8b9024) = 0
ioctl(3, 0x40206b00, 0xbea86a30) = 1
nanosleep({0, 1520000}, NULL) = 0
ioctl(3, 0x40206b00, 0xbea86a30) = -1 EINVAL (Invalid argument)
dup(2) = 4
fcntl64(4, F_GETFL) = 0x2 (flags O_RDWR)
fstat64(4, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xb6f4b000
_llseek(4, 0, 0xbea86910, SEEK_CUR) = -1 ESPIPE (Illegal seek)
write(4, "SPI: SPI_IOC_MESSAGE Failed: Inv"..., 46SPI: SPI_IOC_MESSAGE
Failed: Invalid argument
) = 46
close(4) = 0
munmap(0xb6f4b000, 4096) = 0
nanosleep({0, 37000}, NULL) = 0
ioctl(3, 0x40206b00, 0xbea86a30) = -1 EINVAL (Invalid argument)
dup(2) = 4
fcntl64(4, F_GETFL) = 0x2 (flags O_RDWR)
fstat64(4, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
*mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0xb6f4b000*
--
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