5 replies to this topic

[ash]

I can do basic IO on this chip without any issues but can i get the interrupt to work, no. Been at it for a few days and im not making any progress, please help!!!!

 

Hardware setup:

NP2+, clk & data lines have pull up resistors, 2 leds on the output of the mcp chip. 2 simple switch for the input with pull up resistors which is shorted to ground when switched. INTA on the mcp has a direct connection to the NP2+ to DIO0.

 

private void SetupPort(Port port){byte IODIA = IODIRA;byte IOCONAddress = IOCON;byte GPINTENAddress = GPINTENA;byte INTCONAddress = INTCONA;byte INTCAPAddress = INTCAPA;byte DEFVALAddress = DEFVALA;if (port == Port.PortB){IODIA = IODIRB;GPINTENAddress = GPINTENB;INTCONAddress = INTCONB;INTCAPAddress = INTCAPB;DEFVALAddress = DEFVALB;}// I/O expander configuration 1010 0000this.device.Write(new byte[] { IOCONAddress, 0xA0 });// Interrupt on change pin 00001111 first 4 are enabled only cus they are inputsthis.device.Write(new byte[] { GPINTENAddress, 0x0F });// default value to compare before the interrupt hitsthis.device.Write(new byte[] { DEFVALAddress, 0x0F });// Interrupt on change control reg, interrupts on default valuethis.device.Write(new byte[] { INTCONAddress, 0x0F });// clear the interupt capture regbyte[] ReadBuffer = new byte[] { INTCAPAddress };this.device.Read(ReadBuffer);// Direction register 11110000 first 4 are outputs and the rest are inputsthis.device.Write(new byte[] { IODIA, 0xF0 });// set outputs to 0//SetIOPort(port, 0);}

 

basicaly the setup is the first 4 bits to be inputs (interrupt driven) and the next 4 bits as outputs.

 

ive configured to only go high when it receives a high level from the input.

 

Its not working at all.

[NooM]

enum Register        {            IODDIR_A = 0x00, // Input/Output address            IPOL_A = 0x02, // sets the polarity of the input pin (invert)            GPINTEN_A = 0x04, // enable interrupt register            DEFVAL_A = 0x06, // default values for interrupt register            INTCON_A = 0x08, // interrupt register            IOCON_A = 0x0A, //             GPPU_A = 0x0C, // pullup resistor addressout            INTF_A = 0x0E,            INTCAP_A = 0x10,            GPIO_A = 0x12, // pins            OLAT_A = 0x14,            IODDIR_B = 0x01,            IPOL_B = 0x03,            GPINTEN_B = 0x05,            DEFVAL_B = 0x07,            INTCON_B = 0x09,            IOCON_B = 0x0B,            GPPU_B = 0x0D,            INTF_B = 0x0F,            INTCAP_B = 0x11,            GPIO_B = 0x13,            OLAT_B = 0x15,        }base.Write(new Byte[] { (Byte)Register.IODDIR_B, 0xFF });base.Write(new Byte[] { (Byte)Register.GPINTEN_B, 0xff });base.Write(new Byte[] { (Byte)Register.GPPU_B, 0xFF });base.Write(new Byte[] { (Byte)Register.DEFVAL_B, 0xFF });base.Write(new Byte[] { (Byte)Register.INTCON_B, 0x00 });base.WriteRead(new Byte[] { (Byte)Register.INTCAP_B }, new Byte[1]);

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thats working for me.

 

interruptB = new InterruptPort(                    InterruptPortB, true,                     Port.ResistorMode.PullUp,                     Port.InterruptMode.InterruptEdgeLow);void interruptB_OnInterrupt(uint data1, uint data2, DateTime time)        {            Byte[] tmp = new Byte[1];            base.WriteRead(new Byte[] { (Byte)Register.INTF_B }, tmp);            base.WriteRead(new Byte[] { (Byte)Register.INTCAP_B }, new Byte[1]);            if (tmp[0] == 1)            {                Debug.Print("durchgangsschalter");            }        }

 

 

edit: the value wich pin has changed doies not come as decimal, like 1,2,3 and so on. its binary 001 is pin (3 (or 2 when you start counting with 0))

[ash]

hi, tried your code and it does not work for me

[NooM]

netmf-toolbox also has a driver.

 

but my code is 100% working, your doing something wrong, maybe the interrupt connection or something like that.

 

 

did you use my register-addresses too ?

also, my code uses portb, and fires when something goes _low_ on a port

[ash]

netmf-toolbox does not do interrupts.

 

Changed everything to adapt to your code and still nothing.

 

Thanks for help but ive implemented a software interrupt routine now.

[NooM]

thats the worst thing todo, so you loose the benefit from not having to poll it all the time cos of the interrupt.

 

post your whole code here. ill have a look