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@MoonshineSG
Last active July 16, 2020 00:03
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#include <Wire.h>
//i2c
#define SLAVE_ADDRESS 0x04
//types of led values
#define LED_OFF 0
#define LED_ON 1
#define LED_BLINK 2
#define LED_BLINK_FAST 3
#define LED_BLINK_BEEP_BEEP 4
#define SPEED 16
//actual GPIO pin #
#define LED_STATUS 2
#define LED_WIFI 3
//request for data type
#define NONE -1
#define RID 1
#define timer 100
#define count_led 2
int led_pins[count_led][2] = {
{LED_STATUS, LED_BLINK_FAST},
{LED_WIFI, LED_BLINK}
};
int send_data = -1;
int analogPin = 0;
int raw = 0;
int Vin = 5;
float Vout = 0;
float R1 = 10000;
float buffer = 0;
void setup()
{
Serial.begin(9600); // start serial for output
// initialize i2c as slave
Wire.begin(SLAVE_ADDRESS);
// define callbacks for i2c communication
Wire.onReceive(receiveData);
Wire.onRequest(sendData);
for (int thisPin = 0; thisPin < count_led; thisPin++) {
pinMode( led_pins[thisPin][0], OUTPUT);
}
Serial.println("Ready!");
}
void change_status(int thisPin, int cycle){
switch (led_pins[thisPin][1]) {
case LED_OFF:
led_off( led_pins[thisPin][0] );
break;
case LED_ON:
led_on( led_pins[thisPin][0] );
break;
case LED_BLINK:
if ( cycle == 1) {
led_on( led_pins[thisPin][0] );
}
if ( cycle == SPEED/2) {
led_off( led_pins[thisPin][0] );
}
break;
case LED_BLINK_FAST :
if ( cycle % 2 == 0) {
led_on( led_pins[thisPin][0] );
} else {
led_off( led_pins[thisPin][0] );
}
break;
case LED_BLINK_BEEP_BEEP :
if ( cycle == 1 || cycle == 5 ) {
led_on( led_pins[thisPin][0] );
}
if ( cycle == 3 || cycle == 7) {
led_off( led_pins[thisPin][0] );
}
break;
}
}
void loop()
{
for (int cycle = 1; cycle <= SPEED; cycle++) {
for (int thisPin = 0; thisPin < count_led; thisPin++) {
change_status(thisPin, cycle);
}
delay(2000/SPEED);
}
}
void led_on(int pin) {
digitalWrite(pin, HIGH);
}
void led_off(int pin) {
digitalWrite(pin, LOW);
}
int read_resistor(){
raw = analogRead(analogPin);
if (raw)
{
int R2 = 0;
buffer = raw * Vin;
Vout = (buffer)/1024.0;
buffer = (Vin/Vout) - 1;
R2 = R1 * buffer;
Serial.print("RID: ");
Serial.println(R2);
return R2;
}
}
// callback for received data
void receiveData(int byteCount){
int command, value;
while(Wire.available()) {
switch (byteCount) {
case 1: //read
command = Wire.read();
Wire.read(); //read last 0
Serial.print ("request for data: ");
Serial.println(command);
send_data = command;
break;
case 3: //write
command = Wire.read();
value = Wire.read();
Wire.read(); //read last 0
Serial.print("request for LED: ");
Serial.print(command);
Serial.print( " - ");
Serial.println(value);
led_pins[command][1] = value;
break;
}
}
}
// callback for sending data
void sendData() {
int value;
switch (send_data) {
case RID:
value = read_resistor();
Wire.write((byte *) &value, sizeof (value));
break;
default:
Serial.println ("unknown request");
break;
}
send_data = NONE;
}
#!/usr/bin/env python
import smbus
import time, struct
# for RPI version 1, use "bus = smbus.SMBus(0)"
bus = smbus.SMBus(1)
LED_STATUS = 0
LED_WIFI = 1
OFF = 0
ON = 1
BLINK = 2
BLINK_FAST = 3
BLINK_BEEP_BEEP = 4
REQUEST_RID = 1
# This is the address we setup in the Arduino Program
address = 0x04
rids = {"empty": [], "a7297":[22000], "bjkk": [10000] }
for v in rids.values():
v.append(10000)
def get_():
pass
def send_led_command(led, status):
bus.write_word_data(address, led, status)
def get_resistor_value():
val = bus.read_word_data(address, REQUEST_RID)
return val
def almost_equal(a, b, tolerance = 15):
bt = b * tolerance / 100
#print "tolerance on %s = %s"%(b, bt)
if a < b - bt: return False
if a > b + bt: return False
return True
def find_rid(value):
for k,v in rids.items():
if len(v) > 1 :
rs = reduce(lambda x, y: x*y, v) / sum(v)
else:
rs = v[0]
#print rs
#print "almost_equal %s %s"%(rs, value)
if almost_equal(value, rs):
print "%s = %s"%(v, rs)
return k
return "Unknown [%s]"%value
while True:
LED = LED_STATUS
var = input("Enter 1 - 5, 9: ")
if not var:
continue
if var == 1:
send_led_command(LED, ON)
elif var == 2:
send_led_command(LED, OFF)
elif var == 3:
send_led_command(LED, BLINK)
elif var == 4:
send_led_command(LED, BLINK_FAST)
elif var == 5:
send_led_command(LED, BLINK_BEEP_BEEP)
elif var == 9:
number = get_resistor_value()
print "get_resistor_value : ", number
print(find_rid(number))
print
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