Display VSYS

src/CMakeLists.txt

@@ -88,6 +88,9 @@ set(zxspectrum_common_libs
   hardware_dma
   hardware_flash # Needed for flash settings (not currently working)
   hardware_sync  # Needed for flash settings (not currently working)
+  hardware_pio
+  hardware_pwm
+  hardware_adc  
   Zeta
   Z80
 )

src/ZxSpectrumMenu.cpp

@@ -8,6 +8,7 @@
 #include "BufferedInputStream.h"
 #include "hardware/clocks.h"
 #include "ff.h"
+#include "ZxSpectrumVoltage.h"
 
 // #define DEBUG_ZX_MENU
 
@@ -156,13 +157,12 @@ ZxSpectrumMenu::ZxSpectrumMenu(
     bool k1 = _zxSpectrum->keyboard1() && _zxSpectrum->keyboard1()->isMounted();
     bool k2 = _zxSpectrum->keyboard2() && _zxSpectrum->keyboard2()->isMounted();
     bool m = _zxSpectrum->mouse() && _zxSpectrum->mouse()->isMounted();
-    pen->printAtF(0, 0, false,"USB: Joystick%s %s%s%s, Keyboard%s %s%s%s, Mice: %s",
-       (jl + jr ? "s" : ""),
+    const float v = read_voltage_sensor();
+    pen->printAtF(0, 0, false,"USB: joy %s%s%s, kbd %s%s%s, mice %s    VSYS: %3.1fv",
        (jl ? "L" : ""), (!jl && !jr ? "0" : (!!jl & !!jr ? "&" : "")), (jr ? "R" : ""),
-       (k1 == k2 ? "s" : ""),
        (k1 ? "1" : ""), (!k1 && !k2 ? "0" : (k1 & k2 ? "&" : "")), (k2 ? "2" : ""),
-       (m ? "1" : "0")
-       );
+       (m ? "1" : "0"),
+       v);
     _devices.repaint();
   });
   
@@ -537,7 +537,7 @@ ZxSpectrumMenu::ZxSpectrumMenu(
 #else
      pen->printAt(0, 0, false, "ZX Spectrum 48K/128K by fruit-bat");
 #endif
-     pen->printAtF(0, 1, false, "Build: %s", __DATE__);
+     pen->printAtF(0, 1, false, "VER: %s", __DATE__);
      pen->printAtF(0, 2, false, "CPU: %s @%3.1fMhz", PICO_MCU, (float)clock_get_hz(clk_sys) / 1000000.0);
 
      pen->printAt(0, SZ_FRAME_ROWS-1, false, "F1 to exit menu");
@@ -652,7 +652,7 @@ void ZxSpectrumMenu::quickLoad(int slot) {
 
 void ZxSpectrumMenu::initialise() {
   loadSettings();
-  
+
   _pathQuickSaves.createFolders(_sdCard);
   _pathTapes.createFolders(_sdCard);
 

src/ZxSpectrumVoltage.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "hardware/gpio.h"
+#include "hardware/adc.h"
+
+static bool voltage_sensor_ready = false;
+
+void init_voltage_sensor() {
+    adc_init();
+    adc_gpio_init(29);
+    adc_select_input(3);
+    voltage_sensor_ready = true;
+}
+
+float read_voltage_sensor() {
+    if (!voltage_sensor_ready) init_voltage_sensor();
+    const float conversion_factor = (3.3f * 3.0f) / (1 << 12);
+    uint16_t result = adc_read();
+    const float v1 = (float)result * conversion_factor;
+
+    return v1;
+}

src/picomputer/picomputer_st7789/CMakeLists.txt

@@ -174,6 +174,7 @@ set(zxspectrum_zx_lcd_common_libs
   tinyusb_board
   hardware_pio
   hardware_pwm
+  hardware_adc
 )
 
 foreach(target