Example at ...\ncs\v1.4.0\zephyr\samples\display\cfb does not work with SSD1306 wired directly to nRF9160DK

[craig.stephan]

Despite following the procedure listed below, no text appears on the OLED display, despite the driver being able to communicate with the device.

I am using nRF Connect SDK v1.4.0.

I build the example that I copied from {INSTALLDIR}\ncs\v1.4.0\zephyr\samples\display\cfb with the following modifications/additions:

1. added nrf9160dk_nrf9160ns.overlay custom device tree overlay file
2. updated prj.conf file to include SSD1306 and to enable the I2C port.

I build the example from within a bash window with the command "west build -b nrf9160dk_nrf9160ns".

After building, I program the nrf9160 with the cfb/build/zephyr/merged.hex.

7317.cfb.zip

Fullscreen 1512.cfb_log.txt Download

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*** Booting Zephyr OS build v2.4.0-ncs1 ***

Flash regions Domain Permissions

00 00 0x00000 0x08000 Secure rwxl

01 31 0x08000 0x100000 Non-Secure rwxl

Non-secure callable region 0 placed in flash region 0 with size 32.

SRAM region Domain Permissions

00 07 0x00000 0x10000 Secure rwxl

08 31 0x10000 0x40000 Non-Secure rwxl

Peripheral Domain Status

00 NRF_P0 Non-Secure OK

01 NRF_CLOCK Non-Secure OK

02 NRF_RTC0 Non-Secure OK

03 NRF_RTC1 Non-Secure OK

04 NRF_NVMC Non-Secure OK

05 NRF_UARTE1 Non-Secure OK

06 NRF_UARTE2 Secure SKIP

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

*** Booting Zephyr OS build v2.4.0-ncs1  ***
Flash regions           Domain          Permissions
00 00 0x00000 0x08000   Secure          rwxl
01 31 0x08000 0x100000  Non-Secure      rwxl

Non-secure callable region 0 placed in flash region 0 with size 32.

SRAM region             Domain          Permissions
00 07 0x00000 0x10000   Secure          rwxl
08 31 0x10000 0x40000   Non-Secure      rwxl

Peripheral              Domain          Status
00 NRF_P0               Non-Secure      OK
01 NRF_CLOCK            Non-Secure      OK
02 NRF_RTC0             Non-Secure      OK
03 NRF_RTC1             Non-Secure      OK
04 NRF_NVMC             Non-Secure      OK
05 NRF_UARTE1           Non-Secure      OK
06 NRF_UARTE2           Secure          SKIP
07 NRF_TWIM2            Non-Secure      OK
08 NRF_SPIM3            Non-Secure      OK
09 NRF_TIMER0           Non-Secure      OK
10 NRF_TIMER1           Non-Secure      OK
11 NRF_TIMER2           Non-Secure      OK
12 NRF_SAADC            Non-Secure      OK
13 NRF_PWM0             Non-Secure      OK
14 NRF_PWM1             Non-Secure      OK
15 NRF_PWM2             Non-Secure      OK
16 NRF_PWM3             Non-Secure      OK
17 NRF_WDT              Non-Secure      OK
18 NRF_IPC              Non-Secure      OK
19 NRF_VMC              Non-Secure      OK
20 NRF_FPU              Non-Secure      OK
21 NRF_EGU1             Non-Secure      OK
22 NRF_EGU2             Non-Secure      OK
23 NRF_DPPIC            Non-Secure      OK
24 NRF_GPIOTE1          Non-Secure      OK
25 NRF_REGULATORS       Non-Secure      OK

SPM: NS image at 0xc000
SPM: NS MSP at 0x200153f0
SPM: NS reset vector at 0xee95
SPM: prepare to jump to Non-Secure image.
initialized SSD1306
font width 10, font height 16
font width 15, font height 24
font width 20, font height 32
x_res 128, y_res 32, ppt 8, rows 4, cols 128
[00:00:00.008,209] <dbg> cfb.cfb_framebuffer_init: number of fonts 3