show battery voltage

CMakeLists.txt

@@ -18,6 +18,7 @@ set(SOURCES
 	src/main.c
   src/term.c
   src/ui.c
+  src/battery.c
   src/syscalls.S
 	# ...
 )

src/battery.c

@@ -0,0 +1,12 @@
+#include "battery.h"
+#include <gint/gint.h>
+
+extern int _battery(int one);
+
+static volatile int battery_voltage;
+static void battery_wrapper(void) { battery_voltage = _battery(1); }
+
+int get_battery_voltage(void) {
+    gint_world_switch(GINT_CALL(battery_wrapper));
+    return battery_voltage;
+}

src/battery.h

@@ -0,0 +1,6 @@
+#ifndef UNS_BATTERY_H
+#define UNS_BATTERY_H
+
+int get_battery_voltage(void);
+
+#endif // #ifndef UNS_BATTERY_H

src/main.c

@@ -61,8 +61,10 @@ int main(void) {
             char buf[128];
             sprintf(buf, "tick_ctr=%d key=0x%x mod=%d shift=%d alpha=%d\n", tick_ctr, kev.key, kev.mod, kev.shift, kev.alpha);
             tgrid_sets(UNS_TERM_ROWS - 2, 0, C_WHITE, C_BLACK, buf);
-            set_statusbar(tick_ctr, shift_state, alpha_state);
+
+            set_statusbar(tick_ctr, shift_state, alpha_state, get_battery_voltage());
             set_menubar();
+
             tgrid_display();
 
             tick_ctr++;

src/ui.c

@@ -6,7 +6,7 @@
 #include <stdio.h>
 #include <string.h>
 
-void set_statusbar(int tick_ctr, int shift_state, int alpha_state) {
+void set_statusbar(int tick_ctr, int shift_state, int alpha_state, int battery) {
     // set green bar
     for (int i = 0; i < UNS_TERM_COLS; i++)
         tgrid_sets(0, i, C_NONE, C_GREEN, " ");
@@ -16,7 +16,7 @@ void set_statusbar(int tick_ctr, int shift_state, int alpha_state) {
 
     // then add actutal text
     char statusbar[UNS_TERM_COLS + 1];
-    sprintf(statusbar, "%s %s t=%d", shift_symbol, alpha_symbol, tick_ctr);
+    sprintf(statusbar, "%s %s t=%d, bat=%d% cV", shift_symbol, alpha_symbol, tick_ctr, battery);
     tgrid_sets(0, 0, C_BLACK, C_GREEN, statusbar);
 }
 

src/ui.h

@@ -1,7 +1,7 @@
 #ifndef UNS_UI_H
 #define UNS_UI_H
 
-void set_statusbar(int tick_ctr, int shift_state, int alpha_state);
+void set_statusbar(int tick_ctr, int shift_state, int alpha_state, int battery);
 
 extern char fnkeys[6][11];
 void set_menubar(void);