static int doModuleMcp23008 (char *progName, int pinBase, char *params)
{
int i2c ;
// Extract the I2C address:
if (*params != ':')
{
fprintf (stderr, "%s: colon expected after pin-base number\n", progName) ;
return FALSE ;
}
++params ;
if (!isdigit (*params))
{
fprintf (stderr, "%s: digit expected after pin-base number\n", progName) ;
return FALSE ;
}
i2c = strtol (params, NULL, 0) ;
if ((i2c < 0x03) || (i2c > 0x77))
{
fprintf (stderr, "%s: i2c address (0x%X) out of range\n", progName, i2c) ;
return FALSE ;
}
mcp23008Setup (pinBase, i2c) ;
return TRUE ;
}
static int doExtensionMcp23008 (char *progName, int pinBase, char *params)
{
int i2c ;
if ((params = extractInt (progName, params, &i2c)) == NULL)
return FALSE ;
if ((i2c < 0x01) || (i2c > 0x77))
{
verbError ("%s: i2c address (0x%X) out of range", progName, i2c) ;
return FALSE ;
}
mcp23008Setup (pinBase, i2c) ;
return TRUE ;
}
int init_zyncoder() {
int i,j;
for (i=0;i<MAX_NUM_ZYNSWITCHES;i++) {
zynswitches[i].enabled=0;
zynswitches[i].midi_cc=0;
}
for (i=0;i<MAX_NUM_ZYNCODERS;i++) {
zyncoders[i].enabled=0;
for (j=0;j<ZYNCODER_TICKS_PER_RETENT;j++) zyncoders[i].dtus[j]=0;
}
wiringPiSetup();
#ifdef MCP23017_ENCODERS
uint8_t reg;
mcp23017Setup(MCP23017_BASE_PIN, 0x20);
// get the node cooresponding to our mcp23017 so we can do direct writes
mcp23017_node = wiringPiFindNode(MCP23017_BASE_PIN);
// setup all the pins on the banks as inputs and disable pullups on
// the zyncoder input
reg = 0xff;
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_IODIRA, reg);
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_IODIRB, reg);
// enable pullups on the unused pins (high two bits on each bank)
reg = 0xff;
//reg = 0xc0;
//reg = 0x60;
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_GPPUA, reg);
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_GPPUB, reg);
// disable polarity inversion
reg = 0;
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_IPOLA, reg);
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_IPOLB, reg);
// disable the comparison to DEFVAL register
reg = 0;
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_INTCONA, reg);
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_INTCONB, reg);
// configure the interrupt behavior for bank A
uint8_t ioconf_value = wiringPiI2CReadReg8(mcp23017_node->fd, MCP23x17_IOCON);
bitWrite(ioconf_value, 6, 0); // banks are not mirrored
bitWrite(ioconf_value, 2, 0); // interrupt pin is not floating
bitWrite(ioconf_value, 1, 1); // interrupt is signaled by high
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_IOCON, ioconf_value);
// configure the interrupt behavior for bank B
ioconf_value = wiringPiI2CReadReg8(mcp23017_node->fd, MCP23x17_IOCONB);
bitWrite(ioconf_value, 6, 0); // banks are not mirrored
bitWrite(ioconf_value, 2, 0); // interrupt pin is not floating
bitWrite(ioconf_value, 1, 1); // interrupt is signaled by high
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_IOCONB, ioconf_value);
// finally, enable the interrupt pins for banks a and b
// enable interrupts on all pins
reg = 0xff;
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_GPINTENA, reg);
wiringPiI2CWriteReg8(mcp23017_node->fd, MCP23x17_GPINTENB, reg);
// pi ISRs for the 23017
// bank A
wiringPiISR(MCP23017_INTA_PIN, INT_EDGE_RISING, mcp23017_bank_ISRs[0]);
// bank B
wiringPiISR(MCP23017_INTB_PIN, INT_EDGE_RISING, mcp23017_bank_ISRs[1]);
#ifdef DEBUG
printf("MCP23017 initialized: INTA %d, INTB %d\n",MCP23017_INTA_PIN,MCP23017_INTB_PIN);
#endif
#else
mcp23008Setup (100, 0x20);
init_poll_zynswitches();
#endif
return 1;
}
