sensors mission - temperature, motion orientation

* sensors mission - temperature, motion orientation

.github/workflows/main.yml

@@ -31,7 +31,7 @@ jobs:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: |
         REPO=$(basename $GITHUB_REPOSITORY)
-        RELEASE_TAG=$(grep '^const release_tag =' mission00*.zig | sed 's/";//' | sed 's/^.*"//')
+        RELEASE_TAG=$(grep '^const release_tag =' mission0_*.zig | sed 's/";//' | sed 's/^.*"//')
         RELEASE_ASSET=$REPO-$RELEASE_TAG.zip
         pushd release
         echo $RELEASE_TAG > RELEASE.md

README.md

@@ -7,13 +7,14 @@ See also [zig-bare-metal-raspberry-pi](https://github.com/markfirmware/zig-bare-
 
 The goal is to replace the [ble buttons broadcaster](https://github.com/markfirmware/microbit-samples/blob/master/source/examples/blebuttonsbroadcaster/main.cpp) with zig on bare metal. This broadcaster is processed by [ultibo-ble-observer](https://github.com/markfirmware/ultibo-ble-observer/releases). Although it has no encryption, no privacy and no authentication, it is still useful for controlling a model railroad in a home or club setting, or at a demo.
 
-* [microbit](https://tech.microbit.org/)
+
+* [microbit](https://tech.microbit.org)
     * [runtime - not used in this bare-metal project](https://lancaster-university.github.io/microbit-docs/#)
         * [led matrix display driver](https://github.com/lancaster-university/microbit-dal/blob/master/source/drivers/MicroBitDisplay.cpp)
     * [nrf51822](https://infocenter.nordicsemi.com/pdf/nRF51822_PS_v3.1.pdf)
-    * [reference](https://infocenter.nordicsemi.com/pdf/nRF51_RM_v3.0.pdf)
-        * gpio p56
-        * radio p81
+    * [reference](https://infocenter.nordicsemi.com/pdf/nRF51_RM_v3.0.1.pdf)
     * [arm cortex-m0](https://developer.arm.com/ip-products/processors/cortex-m/cortex-m0)
+        * [cortex m0 user's guide](https://static.docs.arm.com/dui0497/a/DUI0497A_cortex_m0_r0p0_generic_ug.pdf?_ga=2.60319917.1865497363.1577386349-160760379.1577386349)
     * [armv6m](https://static.docs.arm.com/ddi0419/e/DDI0419E_armv6m_arm.pdf?_ga=2.152616249.101383920.1573135559-619929151.1573135559)
-    * [pin assignments (sheet 5)](https://github.com/bbcmicrobit/hardware/blob/master/SCH_BBC-Microbit_V1.3B.pdf)
+    * [edge connector and pins](https://tech.microbit.org/hardware/edgeconnector)
+    * [pin assignments (sheet 5 of schematic)](https://github.com/bbcmicrobit/hardware/blob/master/SCH_BBC-Microbit_V1.3B.pdf)

build.sh

@@ -2,10 +2,14 @@
 set -e
 
 ARCH=thumbv6m
-SOURCE=$(ls mission00*.zig)
+SOURCE=$(ls mission0*.zig)
 
 echo zig version $(zig version)
 zig fmt *.zig
+touch symbols.txt
+zig build
+llvm-objdump-6.0 --source zig-cache/bin/main > main.asm
+grep '^00000000.*:$' main.asm | sed 's/^00000000//' > symbols.txt
 zig build
 
 #llvm-objdump -x --source main > asm.$ARCH
@@ -14,4 +18,4 @@ zig build
 #grep 'q[0-9].*#' asm.$ARCH | egrep -v '#(-|)(16|32|48|64|80|96|112|128)'
 #set -e
 
-ls -lt main.hex zig-cache/bin/main.img
+ls -l main.hex zig-cache/bin/main.img symbols.txt

build.zig

@@ -1,24 +1,39 @@
-pub fn build(b: *Builder) void {
-    const arch = builtin.Arch{ .thumb = builtin.Arch.Arm32.v6m };
-    const environ = builtin.Abi.none;
+pub fn build(b: *std.build.Builder) !void {
     const exec_name = "main";
     const mode = b.standardReleaseOptions();
-    const os = builtin.Os.freestanding;
+    const main = b.option([]const u8, "main", "main file") orelse "mission0_mission_selector.zig";
+    const want_display = b.option(bool, "display", "graphics display for qemu") orelse false;
 
-    const exe = b.addExecutable(exec_name, "mission00_mission_selector.zig");
+    const exe = b.addExecutable(exec_name, main);
+    exe.install();
     exe.installRaw("main.img");
     exe.setBuildMode(mode);
     exe.setLinkerScriptPath("linker.ld");
-    exe.setTarget(arch, os, environ);
+    exe.setTheTarget(try std.Target.parse(.{
+        .arch_os_abi = "thumb-freestanding-none",
+    }));
 
     const run_makehex = b.addSystemCommand(&[_][]const u8{
         "zig", "run", "makehex.zig",
     });
     run_makehex.step.dependOn(&exe.step);
 
+    const qemu = b.step("qemu", "run in qemu");
+    const run_qemu = b.addSystemCommand(&[_][]const u8{
+        "qemu-system-arm",
+        "-kernel",
+        "zig-cache/bin/main.img",
+        "-M",
+        "microbit",
+        "-serial",
+        "stdio",
+        "-display",
+        if (want_display) "gtk" else "xnone",
+    });
+    qemu.dependOn(&run_qemu.step);
+    run_qemu.step.dependOn(&exe.step);
+
     b.default_step.dependOn(&run_makehex.step);
 }
 
-const Builder = std.build.Builder;
-const builtin = @import("builtin");
 const std = @import("std");