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add battery status

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This commit is contained in:
Jorj Bauer 2020-12-28 19:28:35 -05:00
parent 736f325e7f
commit 0f834e0ce2
2 changed files with 58 additions and 3 deletions
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7
apple/appleui.cpp
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@ -54,9 +54,9 @@ void AppleUI::drawPercentageUIElement(uint8_t element, uint8_t percent)
void AppleUI::drawBatteryStatus(uint8_t percent)
{
uint16_t xoff = 301*2;
uint16_t xoff = 301;
uint16_t yoff = 222;
// the area around the apple is 12 wide; it's exactly 11 high the
// color is 210/202/159
@ -93,7 +93,8 @@ void AppleUI::drawBatteryStatus(uint8_t percent)
g = (float)g * alpha + (bgg * (1.0 - alpha));
b = (float)b * alpha + (bgb * (1.0 - alpha));
g_display->drawPixel(x+xoff, y+yoff, r, g, b);
uint16_t color16 = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3);
g_display->drawUIPixel(x+xoff, y+yoff, color16);
}
}
}

54
teensy/teensy.ino
View File

@ -26,6 +26,8 @@
#define RESETPIN 38
#define DEBUGPIN 23
#define BATTERYLEVEL 20 // analog reading of battery voltage (scaled to half)
#define BATTERYSELECT 21 // digital select that turns on the power reading ckt
#include "globals.h"
#include "teensy-crash.h"
@ -43,6 +45,23 @@ Bounce resetButtonDebouncer = Bounce();
volatile bool cpuClockInitialized = false;
// The battery voltage measurement comes through a 50% ratio voltage
// divider; and the analog resolution is set to 8 bits (so a max of
// 256); with a fixed voltage reference of 3.3v (standard in the
// Teensy 4.1). Since the voltage of a 16550 battery is 4.2v (at
// 100%) to 2.5v (at 0%), that means we should expect the
// currentBatteryReading to be about 97 - 163. Since this is
// imperfect due to tolerance in the resistors and whatnot, we might
// as well call that 100 - 160.
volatile uint16_t currentBatteryReading = 0;
volatile uint16_t currentBatteryCount = 0;
volatile uint16_t currentBatterySum = 0;
#define BATTERYMIN 100
#define BATTERYMAX 160
// how often should we read the battery level?
#define BATTERYPERIOD (60 * 100000)
void onKeypress(int unicode)
{
/*
@ -80,6 +99,9 @@ void setup()
delay(120); // let the power settle
pinMode(DEBUGPIN, OUTPUT); // for debugging
pinMode(BATTERYSELECT, OUTPUT);
digitalWrite(BATTERYSELECT, false); // leave it off by default
pinMode(BATTERYLEVEL, INPUT);
// enableFaultHandler();
// SCB_SHCSR |= SCB_SHCSR_BUSFAULTENA | SCB_SHCSR_USGFAULTENA | SCB_SHCSR_MEMFAULTENA;
@ -344,8 +366,40 @@ void runCPU(uint32_t now)
void loop()
{
static uint32_t readingBattery = 0; // set to millis() + a settle time constant when we start reading
static uint32_t nextReadBattery = micros() + BATTERYPERIOD;
uint32_t now = micros();
if (readingBattery && now >= readingBattery) {
// Take 10 readings over a second and average them
currentBatterySum += analogRead(BATTERYLEVEL);
readingBattery = now + 100000; // 100 ms
if (++currentBatteryCount >= 10) {
currentBatteryReading = currentBatterySum / currentBatteryCount;
readingBattery = 0;
digitalWrite(BATTERYSELECT, false);
nextReadBattery = now + BATTERYPERIOD;
// Set up the displayed battery level
if (currentBatteryReading < BATTERYMIN)
currentBatteryReading = BATTERYMIN;
if (currentBatteryReading > BATTERYMAX)
currentBatteryReading = BATTERYMAX;
((AppleUI *)g_ui)->drawBatteryStatus(map(currentBatteryReading,
BATTERYMIN, BATTERYMAX,
0, 100));
}
}
else if (!readingBattery && now >= nextReadBattery) {
// start reading the battery
readingBattery = now + 1 * 1000000; // let it settle for 1 second
currentBatterySum = 0;
currentBatteryCount = 0;
digitalWrite(BATTERYSELECT, true);
}
static bool wasBios = false; // so we can tell when it's done
if (g_biosInterrupt) {
runBIOS(now);