void* blinkerThread(void* param)
{
struct threadParams * p = (struct threadParams *) param;
int tid = pthread_self() ;
int pin6=6, pin7=7;
int bit6 = 1 << (pin6 & 7) ;
int bit7 = 1 << (pin7 & 7) ;
int fd = p->fd ;
int value = LOW;
// int old = p->old ;
printf("%d: Blinker thread started...\n", tid) ;
wiringPiI2CWriteReg8 (fd, MCP23x17_IOCON, 0b01100100) ; // mirror interrupts, disable sequential mode, open drain
unsigned int nInt = wiringPiI2CReadReg8 (fd, MCP23x17_IOCON ); // Read
printf("IOCONA="); bin_prnt_byte(nInt);
wiringPiI2CWriteReg8 (fd, MCP23x17_IODIRA, 0x0) ; // Set direction as output - 5 B ports
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_IODIRA ); // Read
printf("IODIRA="); bin_prnt_byte(nInt);
wiringPiI2CWriteReg8 (fd, MCP23x17_IPOLA, 0x0) ; // Set POLARITY bit same as GPIO
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_IPOLA ); // Read
printf("IPOLA="); bin_prnt_byte(nInt);
p->old = wiringPiI2CReadReg8 (fd, MCP23x17_OLATA ); // Read
printf("OLATA="); bin_prnt_byte(nInt);
printf ("Port A setup completed.\n") ;
while (g_ShouldRun)
{
while(!g_EndBlink)
{
if (value == LOW)
p->old &= (~bit6) ;
else
p->old |= bit6 ;
wiringPiI2CWriteReg8 (fd, MCP23x17_GPIOA, p->old);
delay(1000);
if (value == LOW)
p->old &= (~bit7) ;
else
p->old |= bit7 ;
wiringPiI2CWriteReg8 (fd, MCP23x17_GPIOA, p->old);
value = !value ;
//printf ("Value=") ; bin_prnt_byte(old) ;
}
wiringPiI2CWriteReg8 (fd, MCP23x17_GPIOA, 0);
delay (1000); //grace sleep
}
printf("%d: Blinker thread: Cleaning and exiting...\n", tid) ;
wiringPiI2CWriteReg8 (fd, MCP23x17_GPIOA, 0);
return NULL;
}
void* myThread(void* param)
{
unsigned int nInt = 0;
struct threadParams* p = (struct threadParams*) param;
int fd = p->fd ;
unsigned int nStamp;
int tid = pthread_self() ;
int value=HIGH ;
int longpress = 0;
// set up to generate interrupts on INTB on pin B0 <> default value (1)
//wiringPiI2CWriteReg8 (fd, MCP23x17_IODIRB, 0x03) ;
wiringPiI2CWriteReg8 (fd, MCP23x17_IOCONB, 0b01101100) ;
// 7. register banks same, 6.mirror interrupts, 5.enable sequential mode, 4.DSSLW enabled, 3.HAEN=1, 2.open drain=0, 1.active-low, 0.unimpl
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_IOCONB ); // Read
printf("IOCONB="); bin_prnt_byte(nInt);
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_INTCONB ); // Read
printf("INTCONB(Before)="); bin_prnt_byte(nInt);
wiringPiI2CWriteReg8 (fd, MCP23x17_INTCONB, 0b00000001) ;
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_INTCONB ); // Read
printf("INTCONB="); bin_prnt_byte(nInt);
wiringPiI2CWriteReg8 (fd, MCP23x17_GPPUB, 0x01) ; // pull-up resistor for switches - 5 B ports
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_GPPUB ); // Read
printf("GPPUB="); bin_prnt_byte(nInt);
wiringPiI2CWriteReg8 (fd, MCP23x17_IPOLB, 0x01) ; // invert polarity of signal
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_IPOLB ); // Read
printf("IOPOLB="); bin_prnt_byte(nInt);
wiringPiI2CWriteReg8 (fd, MCP23x17_GPINTENB, 0x01) ; // enable interrupts
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_GPINTENB ); // Read
printf("GPINTENB="); bin_prnt_byte(nInt);
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_INTCAPB ); // clear interrupt flag
printf("INTCAPB-") ;
bin_prnt_byte(nInt) ;
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_GPIOB ); // clear interrupt
printf("GPIOB="); bin_prnt_byte(nInt);
printf("Port B setup completed.\n") ;
//wiringPiI2CWriteReg8 (fd, MCP23x17_IODIRB, 0x1f) ;
//wiringPiI2CWriteReg8 (fd, MCP23x17_INTCONB, 0x1f) ;
//wiringPiI2CWriteReg8 (fd, MCP23x17_DEFVALB, 0x1f) ;
//wiringPiI2CWriteReg8 (fd, MCP23x17_GPINTENB, 0x1f) ;
//wiringPiI2CReadReg8 (fd, MCP23x17_INTCAPB ); // clear interrupt flag
printf("%d: Interrupt thread started...\n", tid) ;
while (g_ShouldRun)
{
if (g_Interrupt)
{
nStamp = millis() ;
printf("\n\nInterrupt handling @ %d\n", nStamp) ;
while (wiringPiI2CReadReg8 (fd, MCP23x17_GPIOB) == 0x01 )
{
// Loop to detect long press
//break ;
printf(".") ;
delay (100) ;
}
g_Interrupt = 0;
printf("\n") ;
longpress = (millis() - nStamp);
if ( longpress <= 500)
g_EndBlink = !(g_EndBlink);
else
{
printf("Time interval (for longpress) - %d\n", longpress) ;
invLED(p, value) ;
value = !value;
}
printf("Processed in %dms\n",longpress) ;
delay (100); //debounce
printf("Clearing registers...\n") ;
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_INTCAPB ); // clear interrupt
printf("INTCAPB="); bin_prnt_byte(nInt);
nInt = wiringPiI2CReadReg8 (fd, MCP23x17_GPIOB ); // clear interrupt
printf("GPIOB="); bin_prnt_byte(nInt);
// nInt = wiringPiI2CReadReg8 (fd, MCP23x17_GPINTENB ); // Read
// printf("GPINTENB(Before)="); bin_prnt_byte(nInt);
// wiringPiI2CWriteReg8 (fd, MCP23x17_GPINTENB, 0b00000001) ;
// nInt = wiringPiI2CReadReg8 (fd, MCP23x17_GPINTENB ); // Read
// printf("GPINTENB="); bin_prnt_byte(nInt);
// nInt = wiringPiI2CReadReg8 (fd, MCP23x17_INTCAPB ); // clear interrupt
// printf("INTCAPB="); bin_prnt_byte(nInt);
// nInt = wiringPiI2CReadReg8 (fd, MCP23x17_GPIOB ); // clear interrupt
// printf("GPIOB="); bin_prnt_byte(nInt);
}
delay(500);
}
printf("%d: Interrupt thread cleaning up...\n", tid) ;
return NULL;
}
/*Convenience function for making buttons with icons on them*/
Window make_unmapped_icon_window(Window root, int x, int y, int width,
int height, int bw, int icx, int icy,
unsigned char *icdata) {
Window win = make_plain_unmapped_window(root, x, y, width, height, bw);
Pixmap pmap = XCreatePixmap(display, root, width, height,
DefaultDepth(display, DefaultScreen(display)));
Colormap cmap = DefaultColormap(display, DefaultScreen(display));
if (UserGradients == 1) {
draw_gradient(pmap, width, height);
} else {
XColor bcolor;
XParseColor(display, cmap, UserWhite, &bcolor);
XAllocColor(display, cmap, &bcolor);
XSetForeground(display, gc, bcolor.pixel);
XDrawRectangle(display, pmap, gc, 0, 0, width, height);
}
int z = 0, row = 0, col = 0;
if (icdata != NULL) {
XColor diffcol;
XParseColor(display, cmap, UserBlack, &diffcol);
XAllocColor(display, cmap, &diffcol);
XSetForeground(display, gc, diffcol.pixel);
unsigned char *ps = icdata;
int intstack[8];
col = 0;
row = -1;
z = 0;
while (row < height) {
col = 0;
row++;
while (1) {
bin_prnt_byte(*ps, intstack);
ps++;
int q = 0;
for (q = 0; q < 8; q++) /*8 bits per byte*/
{
if (col >= width) {
/*myint[z] = 0;*/
} else {
if (intstack[q] == 1) {
XDrawPoint(display, pmap, gc, col, row);
}
}
z++;
col++;
}
if (col >= width) {
break;
}
}
}
}
XSetWindowBackgroundPixmap(display, win, pmap);
XFreePixmap(display, pmap);
return win;
}
