! Helibrewer was correct, the backlight was too bright... so it was working all along :smack:. Also the RGB code was causing the screen to go out, and using the LCD.RED fixed that.
#!/usr/bin/python
from time import sleep
from Adafruit_I2C import Adafruit_I2C
from Adafruit_MCP230xx import Adafruit_MCP230XX
from Adafruit_CharLCDPlate import Adafruit_CharLCDPlate
import smbus
import socket,os
import StringIO
import csv
import socket
import MySQLdb as mdb
import sys
# connect to the database
con = None
lcdinfo = []
tpID = 0
tpTempAddr = 1
tpTcAddr = 2
tpThAddr = 3
tpLCD = 4
tpRGB = 5
try:
con = mdb.connect('localhost', 'teensypi', 'teensypi', 'teensypi')
cur = con.cursor()
cur2 = con.cursor()
cur.execute("SELECT id, tempAddr, tcAddr, thAddr, lcd, rgb FROM action WHERE lcd>0")
numrows = int(cur.rowcount)
# rows = cur.fetchall()
# print numrows
for x in range(0, numrows):
row = cur.fetchone()
lcdinfo.append([])
# print row
lcdinfo[x].append(row[tpID])
# print lcdinfo[x][0]
cur2.execute("SELECT name FROM chipNames where address = %s",(row[1]))
lcdinfo[x].append(cur2.fetchone())
# print lcdinfo[x][1][0]
# print lcdinfo[x][1][0].center(20, ' ')
cur2.execute("SELECT name FROM chipNames where address = %s",(row[2]))
lcdinfo[x].append(cur2.fetchone())
# print lcdinfo[x][2]
cur2.execute("SELECT name FROM chipNames where address = %s",(row[3]))
lcdinfo[x].append(cur2.fetchone())
# print lcdinfo[x][3]
lcdinfo[x].append(int(row[tpLCD]))
# print lcdinfo[x][4]
lcdinfo[x].append(int(row[tpRGB]))
# print lcdinfo[x][tpRGB]
except mdb.Error, e:
print "Error %d: %s" % (e.args[0], e.args[1])
sys.exit(1)
finally:
if con:
con.close()
# initialize the LCD plate(s)
# use busnum = 0 for raspi version 1 (256MB) and busnum = 1 for version 2
lcd = []
for x in range(0,numrows):
lcd.append([])
lcd[x] = Adafruit_CharLCDPlate(busnum = 0, address=(lcdinfo[x][4]))
lcd[x].begin(20, 4)
# clear display
lcd[x].clear()
lcd[x].setCursor(0, 0)
lcd[x].message(((lcdinfo[x][tpTempAddr])[0])[0:20].center(20, ' '))
lcd[x].setCursor(0,1)
lcd[x].message("Temperature: ")
lcd[x].setCursor(0,2)
lcd[x].message((lcdinfo[x][tpTcAddr])[0])
lcd[x].message(": ")
lcd[x].setCursor(0,3)
lcd[x].message((lcdinfo[x][tpThAddr])[0])
lcd[x].message(": ")
# first loop, just changes the color
while 1:
# sleep(.5)
s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect("/tmp/teensypi")
s.send('C\n')
data = s.recv(1024)
s.close()
for x in range(0,numrows):
splitActionArray = data.split(';', lcdinfo[x][0])
actionItem = splitActionArray[lcdinfo[x][tpID]]
# print actionItem
splitActionItem = actionItem.split(',')
lcd[x].setCursor(17,1)
lcd[x].message(splitActionItem[1])
lcd[x].setCursor(16,2)
if lcdinfo[x][tpRGB] == 0:
lcd[x].backlight(lcd[x].RED)
if splitActionItem[2] == 'F':
lcd[x].message(" OFF")
else:
lcd[x].message(" ON ")
if lcdinfo[x][tpRGB] == 1:
lcd[x].backlight(lcd[x].BLUE)
lcd[x].setCursor(16,3)
if splitActionItem[3] == 'F':
lcd[x].message(" OFF")
else:
lcd[x].message(" ON ")
if lcdinfo[x][tpRGB] == 1:
lcd[x].backlight(lcd[x].RED)
if splitActionItem[2] == 'F' and splitActionItem[3] == 'F' and lcdinfo[x][tpRGB] == 1:
lcd[x].backlight(lcd[x].GREEN)
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <errno.h>
#include <wiringPi.h>
#include <lcd.h>
// MCP23S17 Registers
#define IOCON 0x0A
#define IODIRA 0x00
#define IPOLA 0x02
#define GPINTENA 0x04
#define DEFVALA 0x06
#define INTCONA 0x08
#define GPPUA 0x0C
#define INTFA 0x0E
#define INTCAPA 0x10
#define GPIOA 0x12
#define OLATA 0x14
#define IODIRB 0x01
#define IPOLB 0x03
#define GPINTENB 0x05
#define DEFVALB 0x07
#define INTCONB 0x09
#define GPPUB 0x0D
#define INTFB 0x0F
#define INTCAPB 0x11
#define GPIOB 0x13
#define OLATB 0x15
// Bits in the IOCON register
#define IOCON_BANK_MODE 0x80
#define IOCON_MIRROR 0x40
#define IOCON_SEQOP 0x20
#define IOCON_DISSLW 0x10
#define IOCON_HAEN 0x08
#define IOCON_ODR 0x04
#define IOCON_INTPOL 0x02
#define IOCON_UNUSED 0x01
// Default initialisation mode
// RGB Backlight Values for Adafruit Raspberry Pi RGB-LCD display
#define OFF 0x0
#define RED 0x01
#define GREEN 0x02
#define YELLOW 0x03
#define BLUE 0x04
#define VIOLET 0x05
#define TEAL 0x06
#define WHITE 0x07
#define RED_LED 0xBF
#define GREEN_LED 0x7F
//BLUE_LED is controlled by the state of bit 0 of oldval
#define TRUE 1
#define FALSE 0
int x, y, xio, fd2, oldval, rows, cols, isRGB;
char *color;
void lcd_pinMode(int pin, int mode);
void lcd_digitalWrite(int pin, int value);
int main (void)
{
oldval = 0;
rows = 4;
cols = 20;
isRGB = TRUE;
i2cAddr = 0x20;
if(isRGB == TRUE)
{
oldval &= 0xFE; // turn Blue_LED ON
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, (GREEN_LED & RED_LED) ) ; //Turn RED_LED and GREEN_LED on
color = "WHITE";
}else{
oldval |= 0x01; // turn Blue_LED OFF
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, RED_LED) ; // Turn BACKLIGHT on
color = "NO RGB";
}
printf ("Raspberry Pi LCD test program\n") ;
xio = wiringPiI2CSetup (i2cAddr);
if (xio < 0){
printf ("xio: Unable to initialise I2C: %s\n", strerror (errno));
return 1;
}
wiringPiI2CWriteReg8 (xio, IOCON, 0x84) ; // IOCON - set BANK bit
wiringPiI2CWriteReg8 (xio, IODIRA, 0x3F) ; // Port A -> Outputs
wiringPiI2CWriteReg8 (xio, IODIRB, 0x00) ; // Port B -> Outputs
digitalWrite = lcd_digitalWrite;
pinMode = lcd_pinMode;
fd2 = lcdInit(rows, cols, 4, 7, 5, 4, 3, 2, 1, 0, 0, 0, 0);
if(fd2 < 0){
printf ("lcdInit 2 failed\n") ;
return 1 ;
}
sleep (1) ;
x = 0;
y = 0;
for(;;)
{
if (rows == 4)
{
lcdPosition (fd2, 0, 0) ; lcdPrintf (fd2, " Adafruit %s ", color) ;
lcdPosition (fd2, 0, 1) ; lcdPuts (fd2, " Raspberry Pi ") ;
lcdPosition (fd2, 0, 2) ; lcdPuts (fd2, " RGB-LCD Plate Test ") ;
lcdPosition (fd2, 0, 3) ; lcdPrintf (fd2, "Iteration: %d", x) ;
}else if(rows == 2){
lcdPosition (fd2, 0, 0) ; lcdPrintf (fd2, "Adafruit %s ", color) ;
lcdPosition (fd2, 0, 1) ; lcdPrintf (fd2, "Iteration:%d", x) ;
}
x++;
if(x % 10 == 0)
{
y++;
if(y < 1 || y > 7){y = 1;}
if(isRGB == TRUE)
{
switch(y)
{
case RED:
{
oldval |= 0x01; // turn Blue_LED OFF
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, RED_LED) ; // Turn RED_LED on
color = "RED";
break;
}
case GREEN:
{
oldval |= 0x01; // turn Blue_LED OFF
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, GREEN_LED) ; // Turn GREEN_LED on
color = "GREEN";
break;
}
case YELLOW:
{
oldval |= 0x01; // turn Blue_LED OFF
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, (GREEN_LED & RED_LED) ) ; //Turn RED_LED and GREEN_LED on
color = "YELLOW";
break;
}
case BLUE:
{
oldval &= 0xFE; // turn Blue_LED ON
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, (GREEN_LED | RED_LED) ) ; //Turn RED_LED and GREEN_LED off
color = "BLUE";
break;
}
case VIOLET:
{
oldval &= 0xFE; // turn Blue_LED ON
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, RED_LED) ; //Turn RED_LED on
color = "VIOLET";
break;
}
case TEAL:
{
oldval &= 0xFE; // turn Blue_LED ON
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, GREEN_LED ) ; //Turn GREEN_LED on
color = "TEAL";
break;
}
case WHITE:
{
oldval &= 0xFE; // turn Blue_LED ON
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, (GREEN_LED & RED_LED) ) ; //Turn RED_LED and GREEN_LED on
color = "WHITE";
break;
}
}
}else{
oldval |= 0x01; // turn Blue_LED OFF
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
wiringPiI2CWriteReg8 (xio, OLATA, RED_LED) ; // Turn BACKLIGHT on
color = "NO RGB";
}
}
}
return 0;
}
void lcd_pinMode(int pin, int mode){}
void lcd_digitalWrite(int pin, int value)
{
oldval &= ~(1 << pin);
oldval |= value << pin;
wiringPiI2CWriteReg8 (xio, OLATB, oldval) ;
}sudo gcc -o ./i2c_lcd -I/usr/localinclude -L/usr/local/lib -lwiringPi i2c_lcd.csudo chmod 755 i2c_lcdsudo i2c_lcd
.
Another one of my P.C. boards showed up, so I assembled one and tested it, works as hoped:
The board has four DS2406+ switches that can be used to control SSRs via the screw terminals, as well as an on-board transistor that I use to power some on-board LEDs, but could also be used to control a device that requires a higher voltage or up to about 100ma of current. I also remembered to include mounting holes
Here are the Eagle Files and Gerber Files:
Eagle Files
Gerber Files
Eagle light won't be able to use a 10 x 10 cm board, due to its size limit of 8 x 10 cm. What I did to panelize my boards was to do all the edits to the layout in Eagle, generate the Gerbers, and then use Gerbmerge. Here's an instructable that got me moving in that direction:I'm using the Eagle Light version, and can't seem to get it to panelize...
Traceback (most recent call last):
File "setup.py", line 41, in <module>
DestDir = os.path.join(DestLib, 'gerbmerge')
File "/usr/lib64/python2.6/posixpath.py", line 67, in join
elif path == '' or path.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'
Didn't realize/remember you were running on Linux. I had trouble with gerbmerge on my Mac as well; ended up running it under Windows in a VM. It's python code, so it seems it should work fine under *nix, and I'm sure it does, but I didn't get that far.
OK I've uploaded the new RPi Image that includes the LCD update software, it's version 0.0.19, as shown in /etc/motd. You can get a copy of the image here. This code should work with my LCD board or the Adafruit RGB LCD Pi Plate.
I've also modified the Teensy3.0 code to include CRC16 checking of the DS2406 status, since I found that very long line lengths and less than optimum topographies could cause read errors during status updates. If you're keeping your lines basically daisey-chained and short, this is probably of no concern to you, but I like to try to consider the worst case.
The Teensy3.0 code is version 0.0.8, and is available at my github account.
