Hello, I cannot get I2C working on my RedBear BLE Nano 2 board. I connected an accelerometer (LIS3DH) but according to gdb the hal_i2c_master_write/read functions just time out.
RedBear BLE Nano 2 pins layout: https://www.kickstarter.com/projects/redbearinc/bluetooth-5-ready-ble-module-nano-2-and-blend-2#h:nano-2 Because rb-nano2's bsp is not configured to support I2C below is what I added to mynewt-core: https://github.com/limal/incubator-mynewt-core/commit/353fcb10368811a7bbe3e2b10f019fb44dc121f7 To rule out a possibility that UART_0 is interfering with I2C, that share the same pins on rb-nano2, I disabled it and send any logging information via Bluetooth to another nano-2 board. Unfortunately the I2C is still timing out. 9100:[ts=71093744ssb, mod=4 level=1] GAP procedure initiated: advertise; disc_mode=2 adv_channel_map=0 own_addr_type=0 adv_filter_policy=0 adv_itvl_min=50 adv_itvl_max=75 adv_data_len=0 9817:[ts=76695268ssb, mod=64 level=1] connection established; status=0 handle=1 our_ota_addr_type=0 our_ota_addr=91:0a:c0:ff:42:57 our_id_addr_type=0 our_id_addr=91:0a:c0:ff:42:57 peer_ota_addr_type=0 peer_ota_addr=0f:0f:0a:0a:0a:0a peer_id_addr_type=0 peer_id_addr=0f:0f:0a:0a:0a:0a conn_itvl=40 conn_latency=0 supervision_timeout=256 encrypted=0 authenticated=0 bonded=0 9827:[ts=76773388ssb, mod=64 level=1] 9828:[ts=76781200ssb, mod=64 level=1] (0): open 10188:[ts=79593712ssb, mod=64 level=1] (0): read_check: 1111 10190:[ts=79609336ssb, mod=64 level=1] (0): hal_write_rc: -1 <------------- 10192:[ts=79624960ssb, mod=64 level=1] (0): hal_read_rc: -11 <------------- 10829:[ts=84601524ssb, mod=64 level=1] (0): read_check: 1111 10830:[ts=84609336ssb, mod=64 level=1] (0): hal_write_rc: -1 <------------- 11469:[ts=89601524ssb, mod=64 level=1] (0): read_check: 1111 12109:[ts=94601524ssb, mod=64 level=1] (0): read_check: 1111 12749:[ts=99601524ssb, mod=64 level=1] (0): read_check: 1111 I have tried adding 10k resistors to pull up SDA/SCL lines but to no avail. And finally I have also connected the accelerometer to Arduino Uno to confirm it's working (I posted Arduino code here: http://discuss.redbear.cc/t/i2c-not-working-on-nano2-in-arduino-and-apache-mynewt/2106 ). I'm very satisfied with mynewt but being unable to use I2C renders the whole project unusable. I'd appreciate any help to sort it out and get I2C to work on rb-nano2. Kind regards, Lukasz
