Thanks for the answer @cas and @Lazar-Demin.

In fact, half-duplex SPI transmissions will work really well in newer versions of Omega2+. I took some time to solve the communication problem between Omega and my Thermal Camera but, finally, I got it.

Hi,

I've been trying to follow the steps with the same modem but it does not work for me.

Here my dmesg:

lsusb:

Devices:

Do you have any idea from where can be the problem?

Thanks in advance,
Pedro Moura

Hi everyone,

I have a thermal sensor mlx90640, which works with I2C 16-bit register addresses. As I understood the i2c library available by onion works only with 8-bit/10-bit addresses.

Is already there any available implementation to overcome this question?

Thanks in advance,
Pedro Moura

Thanks for the answer @cas and @Lazar-Demin.

In fact, half-duplex SPI transmissions will work really well in newer versions of Omega2+. I took some time to solve the communication problem between Omega and my Thermal Camera but, finally, I got it.

Hi guys,

I have been trying to work with Omega2+ and SPI communications, until now unsuccessfully.
After test some firmware versions of Omega, I realized that SPI is working great with versions older than "v0.1.9-b159" (included). For newer versions, the correct data does not reach the receiver.

I am testing the SPI communication, using the Onion Spi-Tool: spi-tool. I tried to read some bytes, maintaining MISO and MOSI connected to each other. So, using the command,

spi-tool -b 1 -d 32766 --sck 7 --mosi 8 --miso 9 --cs 6 read 0x07

and varying the byte read, the result is always the same: 0x00. Using the version "v0.1.9-b159", the reading works as expected (read 0x07: 0x07).

Library and Kernel Modules already updated:

1. libonionspi
2. kmod-spi-bitbang
3. kmod-spi-dev
4. kmod-spi-gpio-custom

Using the command "dmesg | grep spi", the result is the following:

• With versions newer than v0.1.9-b159:
  [ 0.354636] spi-mt7621 10000b00.spi: sys_freq: 193333333
  [ 0.364822] m25p80 spi32766.0: using chunked io (size=31)
  [ 0.370321] m25p80 spi32766.0: mx25l25635e (32768 Kbytes)
  [ 0.375863] 4 ofpart partitions found on MTD device spi32766.0
  [ 0.381776] Creating 4 MTD partitions on "spi32766.0":

• With version v0.1.9-b159:
  [ 0.351457] spi-mt7621 10000b00.spi: sys_freq: 193333333
  [ 0.361491] m25p80 spi32766.0: using chunked io (size=31)
  [ 0.366988] m25p80 spi32766.0: mx25l25635e (32768 Kbytes)
  [ 0.372558] 4 ofpart partitions found on MTD device spi32766.0
  [ 0.378487] Creating 4 MTD partitions on "spi32766.0":
  [ 10.473111] spidev spi32766.1: buggy DT: spidev listed directly in DT
  [ 10.484434] WARNING: CPU: 0 PID: 473 at drivers/spi/spidev.c:720 0x8710c33c()
  [ 10.491675] Modules linked in: spidev(+) snd_usbmidi_lib slhc rfcomm nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables hidp hid_generic hci_uart crc_ccitt cdc_acm btusb btintel bnep bluetooth snd_soc_simple_card snd_soc_ralink_i2s snd_soc_wm8960 videobuf2_vmalloc videobuf2_memops videobuf2_core hid v4l2_common videodev evdev snd_soc_core ralink_gdma virt_dma mt76x8 ralink_eeprom_api ledtrig_oneshot ledtrig_morse ledtrig_heartbeat ledtrig_gpio ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables msdos snd_pcm_dmaengine snd_compress snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_rawmidi snd_seq_device snd_hwdep snd input_core soundcore vfat fat ntfs configfs autofs4 nls_utf8 nls_iso8859_1 nls_cp437 regmap_i2c dma_shared_buffer ecb cmac mmc_block usb_storage sdhci_pltfm sdhci mtk_sd mmc_core leds_gpio ohci_platform ohci_hcd ledtrig_transient ehci_platform ehci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache exfat usbcore nls_base usb_common crc16 aead crypto_null cryptomgr crc32c_generic crypto_hash
  [ 10.718008] [<801dd064>] spi_drv_probe+0x3c/0x84
  [ 10.732313] [<801dcf64>] spi_match_device+0x38/0xa8
  [ 10.802172] [<877e3000>] init_module+0x0/0xdc [spidev]
  [ 10.825719] [<877e3098>] init_module+0x98/0xdc [spidev]
  [ 10.839729] [<877e3000>] init_module+0x0/0xdc [spidev]
  [ 10.854375] [<877e3000>] init_module+0x0/0xdc [spidev]

Any ideas?

Thanks for advance,