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"""
My first application
"""
import toga
from toga.style import Pack
from toga.style.pack import COLUMN, ROW

from rubicon.java import JavaClass, JavaInterface
from rubicon.java.jni import java

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/discover
Script started on 2021-05-25 19:22:12+01:00 [TERM="screen" TTY="/dev/pts/4" COLUMNS="143" LINES="34"]


[]0;dan@loaclhost: ~/src/nixos-potter/mobile-nixosdan@loaclhost:~/src/nixos-potter/mobile-nixos]$ NIX_PATH="nixpkgs=../nixpkgs-for-mobile" nix-build examples/hello/ -A build.default --argstr de
evice motorola-potter --show-trace
trace: **************************************
trace: * Evaluating device: motorola-potter *
trace: **************************************
trace: Building with crossSystem?: aarch64-linux != x86_64-linux → we are.

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[    0.112344,0] scm_call failed: func id 0x42000101, ret: -1, syscall returns: 0x0, 0x0, 0x0
[    0.116810,1] cpuidle: using governor ladder
[    0.123472,2] cpuidle: using governor menu
[    0.130108,2] cpuidle: using governor qcom
[    0.131784,2] vdso: 2 pages (1 code @ ffffffc000e96000, 1 data @ ffffffc001444000)
[    0.131821,2] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[    0.132670,2] software IO TLB: mapped [mem 0xed400000-0xed800000] (4MB)
[    0.133472,2] DMA: preallocated 256 KiB pool for atomic allocations
[    0.138307,2] __of_mpm_init(): MPM driver mapping exists
[    0.140063,2] platform soc:qcom,kgsl-hyp: assigned reserved memory node gpu_region@0

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potter:/sdcard # aplay -v -v -v --dump-hw-params out.wav                                 
Playing WAVE 'out.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
HW Params of device "default":
--------------------
ACCESS:  MMAP_INTERLEAVED MMAP_NONINTERLEAVED MMAP_COMPLEX RW_INTERLEAVED RW_NONINTERLEAVED
FORMAT:  S8 U8 S16_LE S16_BE U16_LE U16_BE S24_LE S24_BE U24_LE U24_BE S32_LE S32_BE U32_LE U32_BE FLOAT_LE FLOAT_BE FLOAT64_LE FLOAT64_BE MU_LAW A_LAW IMA_ADPCM S20_LE S20_BE U20_LE U20_BE S24_3LE S24_3BE U24_3LE U24_3BE S20_3LE S20_3BE U20_3LE U20_3BE S18_3LE S18_3BE U18_3LE U18_3BE
SUBFORMAT:  STD
SAMPLE_BITS: [4 64]
FRAME_BITS: [4 640000]
CHANNELS: [1 10000]

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Audio

(This is still quite exploratory: when some of the questions have been answered and we find out if our suppositions are right, we can build a configuration option to enable audio cleanly)

To enable the audio subsystem, you first need to write to /dev/subsys_adsp

# echo 1 > /dev/subsys_adsp

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[dan@noetbook:~/src/odroid/uboot]$ cat default.nix 
with import <nixpkgs> {} ;
pkgsCross.aarch64-multiplatform.ubootOdroidC2.override {
  extraPatches = [
    (pkgs.fetchPatch { 
        url="https://source.denx.de/u-boot/u-boot/-/commit/a246e21351778a93805b3f52302a420f4b268601.diff";
	sha256 = lib.fakeHash;
    })];
}

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# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  nixpkgs.overlays = [
    (self: super: {

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# this is Work In Progress configuration.nix for cross-compiling
# a Kodi appliance based on the Odroid C2

{ config, lib, pkgs, ... }:

{
  nixpkgs.overlays = [
    (self: super: {

      # make-tarball is hardcoded to use pixz, but waqnts a host

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  /nix/store/vv9ij1wd45vckp9bm1xp776zb51h4wcq-gcc-wrapper-9.3.0/bin/cc   -o scripts/kconfig/nconf scripts/
kconfig/nconf.o scripts/kconfig/nconf.gui.o scripts/kconfig/confdata.o scripts/kconfig/expr.o scripts/kcon
fig/lexer.lex.o scripts/kconfig/menu.o scripts/kconfig/parser.tab.o scripts/kconfig/preprocess.o scripts/k
config/symbol.o scripts/kconfig/util.o   -L /nix/store/4wsq4c9v3hjlmbiaq8d8r1al7pm27jib-ncurses-6.2/lib -l
ncursesw -lmenuw -lpanelw
cho "no-op"
/bin/sh: cho: not found
make[1]: *** [scripts/kconfig/Makefile:48: nconfig] Error 127

guessing this was introduced by the gnarly sed expression in kernel/builder.nix 

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diff --git a/src/platforms/f4discovery/Makefile.inc b/src/platforms/f4discovery/Makefile.inc
index ae6b75a..578aebb 100644
--- a/src/platforms/f4discovery/Makefile.inc
+++ b/src/platforms/f4discovery/Makefile.inc
@@ -26,10 +26,11 @@ $(info  Load address 0x08004000 for BMPBootloader)
 LDFLAGS = $(LDFLAGS_BOOT) -Wl,-Ttext=0x8004000
 CFLAGS += -DDFU_SERIAL_LENGTH=9
 else
-LDFLAGS += $(LDFLAGS_BOOT)
+LDFLAGS += $(LDFLAGS_BOOT) -Wl,-Ttext=0x8000000