feelfreetofee · June 30, 2024 00:39 · Jun 30, 2024
diff --git a/led.lua b/led.lua
@@ -0,0 +1,14 @@
+local uv = require('uv')
+local gpio = require('./wiringPi.lua')
+
+gpio.wiringPiSetup()
+
+local led = 2
+local led_state = gpio.digitalRead(led)
+gpio.pinMode(led, 1) -- OUTPUT
+
+while true do
+	led_state = led_state == 1 and 0 or 1
+	gpio.digitalWrite(led, led_state)
+	uv.sleep(500)
+end
diff --git a/switch.lua b/switch.lua
@@ -0,0 +1,21 @@
+local uv = require('uv')
+local gpio = require('./wiringPi.lua')
+
+gpio.wiringPiSetup()
+
+local switch = 0
+local switch_state = 1
+gpio.pinMode(switch, 0) -- INPUT
+gpio.pullUpDnControl(switch, 2) -- PULLED UP
+
+function cb()
+	print(('Button %s'):format(switch_state == 1 and 'released' or 'pressed'))
+end
+
+while true do
+	if gpio.digitalRead(switch) ~= switch_state then
+		switch_state = switch_state == 1 and 0 or 1
+		cb()
+		uv.sleep(300)
+	end
+end
diff --git a/switch_led.lua b/switch_led.lua
@@ -0,0 +1,28 @@
+local uv = require('uv')
+local gpio = require('./wiringPi.lua')
+
+gpio.wiringPiSetup()
+
+local switch = 0
+local switch_state = 1
+gpio.pinMode(switch, 0) -- INPUT
+gpio.pullUpDnControl(switch, 2) -- PULLED UP
+
+local led = 2
+local led_state = gpio.digitalRead(led)
+gpio.pinMode(led, 1) -- OUTPUT
+
+function cb()
+	if switch_state == 1 then
+		led_state = led_state == 1 and 0 or 1
+		gpio.digitalWrite(led, led_state)
+	end
+end
+
+while true do
+	if gpio.digitalRead(switch) ~= switch_state then
+		switch_state = switch_state == 1 and 0 or 1
+		cb()
+		uv.sleep(300)
+	end
+end
diff --git a/wiringPi.lua b/wiringPi.lua
@@ -0,0 +1,137 @@
+local ffi = require('ffi')
+
+ffi.cdef[[
+	// Core wiringPi functions
+
+	enum WPIPinType {
+		WPI_PIN_BCM = 1,
+		WPI_PIN_WPI,
+		WPI_PIN_PHYS,
+	};
+
+	void wiringPiVersion (int *major, int *minor);
+	int wiringPiGlobalMemoryAccess(void); // Interface V3.3
+	int wiringPiUserLevelAccess (void);
+	int wiringPiSetup (void);
+	int wiringPiSetupSys (void);
+	int wiringPiSetupGpio (void);
+	int wiringPiSetupPhys (void);
+	int wiringPiSetupPinType (enum WPIPinType pinType); // Interface V3.3
+	int wiringPiSetupGpioDevice(enum WPIPinType pinType); // Interface V3.3
+
+	enum WPIPinAlt {
+		WPI_ALT_UNKNOWN = -1,
+		WPI_ALT_INPUT = 0,
+		WPI_ALT_OUTPUT,
+		WPI_ALT5,
+		WPI_ALT4,
+		WPI_ALT0,
+		WPI_ALT1,
+		WPI_ALT2,
+		WPI_ALT3,
+		WPI_ALT6,
+		WPI_ALT7,
+		WPI_ALT8,
+		WPI_ALT9,
+		WPI_NONE = 0x1F, // Pi5 default
+	};
+
+	int wiringPiGpioDeviceGetFd(); // Interface V3.3
+	void pinModeAlt(int pin, int mode);
+	enum WPIPinAlt getPinModeAlt(int pin); // Interface V3.5, same as getAlt but wie enum
+	void pinMode(int pin, int mode);
+	void pullUpDnControl(int pin, int pud);
+	int digitalRead(int pin);
+	void digitalWrite(int pin, int value);
+	unsigned int digitalRead8(int pin);
+	void digitalWrite8(int pin, int value);
+	void pwmWrite(int pin, int value);
+	int analogRead(int pin);
+	void analogWrite(int pin, int value);
+
+	// On-Board Raspberry Pi hardware specific stuff
+
+	int piGpioLayout(void);
+	int piBoardRev(void); // Deprecated, but does the same as piGpioLayout
+	void piBoardId(int *model, int *rev, int *mem, int *maker, int *overVolted);
+	int wpiPinToGpio(int wpiPin);
+	int physPinToGpio(int physPin);
+	void setPadDrive(int group, int value);
+	void setPadDrivePin(int pin, int value); // Interface V3.0
+	int getAlt(int pin);
+	void pwmToneWrite(int pin, int freq);
+	void pwmSetMode(int mode);
+	void pwmSetRange(unsigned int range);
+	void pwmSetClock(int divisor);
+	void gpioClockSet(int pin, int freq);
+	unsigned int digitalReadByte(void);
+	unsigned int digitalReadByte2(void);
+	void digitalWriteByte(int value);
+	void digitalWriteByte2(int value);
+
+	// Interrupts
+	// (Also Pi hardware specific)
+
+	int waitForInterrupt(int pin, int mS);
+	int wiringPiISR(int pin, int mode, void (*function)(void));
+	int wiringPiISRStop(int pin); // V3.2
+	int waitForInterruptClose(int pin); // V3.2
+
+	// Threads
+
+	int piThreadCreate(void *(*fn)(void *));
+	void piLock(int key);
+	void piUnlock(int key);
+
+	// Schedulling priority
+
+	int piHiPri(const int pri);
+]]
+
+return ffi.load('wiringPi.so')
+
+-- local definitions {
+	-- -- wiringPi modes
+
+	-- WPI_MODE_PINS = 0,
+	-- WPI_MODE_GPIO = 1,
+	-- WPI_MODE_GPIO_SYS = 2, -- deprecated since 3.2
+	-- WPI_MODE_PHYS = 3,
+	-- WPI_MODE_PIFACE = 4,
+	-- WPI_MODE_GPIO_DEVICE_BCM = 5, -- BCM pin numbers like WPI_MODE_GPIO
+	-- WPI_MODE_GPIO_DEVICE_WPI = 6, -- WiringPi pin numbers like WPI_MODE_PINS
+	-- WPI_MODE_GPIO_DEVICE_PHYS = 7, -- Physic pin numbers like WPI_MODE_PHYS
+	-- WPI_MODE_UNINITIALISED = -1,
+
+	-- -- Pin modes
+
+	-- INPUT = 0,
+	-- OUTPUT = 1,
+	-- PWM_OUTPUT = 2,
+	-- GPIO_CLOCK = 3,
+	-- SOFT_PWM_OUTPUT = 4,
+	-- SOFT_TONE_OUTPUT = 5,
+	-- PWM_TONE_OUTPUT = 6,
+	-- PM_OFF = 7, -- to input / release line
+
+	-- LOW = 0,
+	-- HIGH = 1,
+
+	-- -- Pull up/down/none
+
+	-- PUD_OFF = 0,
+	-- PUD_DOWN = 1,
+	-- PUD_UP = 2,
+
+	-- -- PWM
+
+	-- PWM_MODE_MS = 0,
+	-- PWM_MODE_BAL = 1,
+
+	-- Interrupt levels
+
+	-- INT_EDGE_SETUP = 0,
+	-- INT_EDGE_FALLING = 1,
+	-- INT_EDGE_RISING = 2,
+	-- INT_EDGE_BOTH = 3
+-- }
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