Marine Electricals
mcp23s17 key read via spi
Diff: main.cpp
- Revision:
- 2:bf1a7c26ec7d
- Parent:
- 0:21b36798fd00
--- a/main.cpp Wed Jun 07 14:08:05 2017 +0000
+++ b/main.cpp Sat Oct 14 13:07:56 2017 +0000
@@ -1,14 +1,503 @@
#include "mbed.h"
-
-SPI device(SPI_MOSI, SPI_MISO, SPI_SCK);
-
-int main() {
- int i = 0;
- while(1) {
- device.write(0x55);
- device.write(i++);
- device.write(0xE0);
- wait_us(50);
+#include "MCP23S17.h"
+#include "pindefine.h"
+
+Serial pc(USBTX,USBRX);
+
+SPI _SPI3(SPI3_MOSI, SPI3_MISO, SPI3_SCK); //for keyscan mcp23s17
+
+MCP23S17 mcp23s17_1(1,_SPI3, SPI3_CS1,SPI3_RST); //class MCP23S17 object instance for mcp23s17 IC-1 key detection
+MCP23S17 mcp23s17_2(2,_SPI3, SPI3_CS2,SPI3_RST); //class MCP23S17 object instance for mcp23s17 IC-2 key detection
+
+//interrupts definations
+InterruptIn int_A(INT_A); //8commands
+InterruptIn int_B(INT_B); //4 3commands+1ack
+InterruptIn int_C(INT_C); //4(3 controls(INC+,DEC-,TEST)+1 req) enbaled for all
+
+enum AddrID
+{
+ eot_Master = 1,
+ eot_Submaster,
+ eot_Slave_MCR,
+ eot_Slave_ER,
+ eot_Listner_WP,
+ eot_Listner_WS,
+ eot_Listner_OPS,
+ eot_Listner_ASP = 8
+};
+
+enum pin_STATUS
+{
+ _OFF =0,
+ _ON =1
+};
+
+enum KEY
+{
+ FH=0,
+ HH,
+ SH,
+ DSH,
+ FS,
+ HS,
+ SS,
+ DSS,
+ STOP,
+ STBY,
+ FWE,
+ FALSE0 = 11
+};
+enum KEY key_ID;
+
+enum CTRL
+{
+ REQ_ = 1,
+ ACK_,
+ FALSE1 = 3
+};
+enum CTRL ctrl_ID;
+
+enum CHANNEL
+{
+ ch_A=1,
+ ch_B,
+ ch_C,
+ ch_D=4
+}; //keyscan channelA,B,C,Dof MCP23s17 1& 2 respectively
+enum CHANNEL ch;
+
+int cmd,req,ack;
+
+class LED{
+public:
+ LED(PinName led); //constructor declaration
+ void set_Brightness(float bright);
+ void ON();
+ void OFF();
+ void FLASHH();
+private:
+ Ticker _flash;
+ bool on_off;
+ bool Fllash;
+ float brightness;
+ PwmOut _LED;
+ void __flash();
+};
+LED::LED(PinName led): _LED(led) //constructor defination
+{
+ brightness = 0.000;
+ on_off = false;
+ Fllash = false;
+ _LED = brightness;
+}
+
+void LED::set_Brightness(float bright)
+{
+ brightness = bright;
+ if(!Fllash)
+ _LED = bright;
+ else
+ __nop();
+}
+
+void LED::ON()
+{
+ _LED = brightness;
+ Fllash = false;
+ _flash.detach();
+}
+
+void LED::OFF()
+{
+ _LED = 0;
+ Fllash = false;
+ _flash.detach();
+}
+
+void LED::FLASHH()
+{
+ Fllash = true;
+ _flash.attach(callback(this, &LED::__flash),0.5);
+}
+
+void LED::__flash()
+{
+ if(on_off)
+ _LED = brightness;
+ else
+ _LED = 0;
+
+ on_off = !on_off;
+}
+
+LED LED_CMD[9] = {_FH,_HH,_DSH,_FS,_HS,_SS,_DSS,_STOP,_STBY}; //ack and req exchanged
+
+LED LED_CTRL[2] = {_REQ,_ACK};
+LED LED_ACH[8] = {_WH,_BRDG,_MCR,_ER,_WP,_WS,_OPS,_ASP};
+
+void CMD_handler(uint8_t CMD_ID) //function sacnning all the 11 command keys
+{
+ if(CMD_ID != FALSE0)
+ {
+ cmd = CMD_ID; //new cmd data updated any value between 1 to 11
+ LED_CMD[cmd].FLASHH();
+ wait_ms(10);
+ }
+ else
+ __nop();
+}
+
+void CTRL_handler(uint8_t CTRL_ID) //handle control transfer
+{
+ if(CTRL_ID != FALSE1)
+ {
+
+ if(CTRL_ID == REQ_)
+ {
+ req = REQ_; //req data updated 0 here, same int values as in enum
+ LED_CTRL[REQ_-1].FLASHH();
+ }
+ else
+ __nop();
+ if(CTRL_ID == ACK_)
+ {
+ ack = ACK_; //ack data updated 2 here
+ LED_CTRL[ACK_-1].FLASHH();
+ }
+ else
+ __nop();
+ }
+ else
+ __nop(); //then do nothing
+}
+
+unsigned char read_KEY_SPI(int CH)
+{
+ char _key;
+ uint8_t spi_err=0;
+ switch(CH)
+ {
+ case 1:
+ if(spi_err<3)
+ {
+ _key=mcp23s17_1.gpioa(); // read(INTCAPA_ADDR);
+ //if(mcp23s17_1.intcapa()) //read(INTCAPA_ADDR)) again if some non zero value obtained //if Interrupt pending
+ // {
+ // spi_err++;
+ // }
+ // else
+ // {
+ // spi_err=0;
+ // }
+ }
+ else
+ {
+ _key=0;
+ LED_ACH[1].FLASHH();
+ }
+ break;
+
+ case 2:
+ if(spi_err<3)
+ {
+ _key=mcp23s17_1.gpiob();
+ // if(mcp23s17_1.intcapb()) //if Interrupt pending
+ // {
+ // spi_err++;
+ // }
+ // else
+ // {
+ // spi_err=0;
+ // }
+ }
+ else
+ {
+ _key=0;
+ }
+ break;
+
+ case 3:
+ if(spi_err<3)
+ {
+ _key=mcp23s17_2.gpioa();
+ // if(mcp23s17_2.intcapa()) //if Interrupt pending
+ // {
+ // spi_err++;
+ // }
+ // else
+ // {
+ // spi_err=0;
+ // }
+ }
+ else
+ {
+ _key=0;
+ }
+ break;
+
+ case 4:
+ _key = mcp23s17_2.gpiob(); //address read PORTB of chip2
+ break;
+ default:
+ _key = 0;
+ break;
+ }
+ return(_key);
+}
+void read_KEY_A() //PORTA of MCP23s17(1) for FH to DSS
+{
+ char key_status = 0;
+ key_status = read_KEY_SPI(ch_A); //to read portA of mcp23s17(1)
+ pc.printf("PORTA button pressed == %d\n",key_status);
+ wait_ms(2);
+ switch(key_status)
+ {
+ case 0xfe: //0xfe GPA0
+ key_ID = FH;
+ break;
+ case 0xfd: //0xfe GPA0
+ key_ID = HH;
+ break;
+ case 0xfb: //0xfe GPA0
+ key_ID = SH;
+ break;
+ case 0xf7: //0xfe GPA0
+ key_ID = DSH;
+ break;
+ case 0xef: //0xfe GPA0
+ key_ID = FS;
+ break;
+ case 0xdf: //0xfe GPA0
+ key_ID = HS;
+ break;
+ case 0xbf: //0xfe GPA0
+ key_ID = SS;
+ break;
+ case 0x7f: //0xfe GPA0
+ key_ID = DSS;
+ break;
+ default:
+ key_ID = FALSE0;
+ break;
+ }
+ CMD_handler(key_ID);
+}
+
+void read_KEY_B() //PORTB of MCP23s17(1) to read STOP,STBY,FWE and ACK keys
+{
+ char key_status = 0;
+ key_status = read_KEY_SPI(ch_B); //to read portBof mcp23s17(1)
+ pc.printf("PORTB button pressed == %d\n",key_status);
+ wait_ms(2);
+ if(key_status != 0xff)
+ {
+ if(key_status==0xf7)
+ {
+ ctrl_ID = ACK_; //control ACK button pressed
+ CTRL_handler(ctrl_ID);
+ }
+ else
+ {
+ if(key_status == 0xfe)
+ key_ID = STOP;
+ else if(key_status == 0xfd)
+ key_ID = STBY;
+ else if(key_status == 0xfb)
+ key_ID = FWE;
+ else
+ {
+ key_ID = FALSE0;
+ ctrl_ID = FALSE1;
+ }
+ CMD_handler(key_ID);
+ }
}
}
-
\ No newline at end of file
+void read_KEY_C() // PORTA of MCP23s17(2) to read REQ,INC,DEC and TEST keys
+{
+ char key_status = 0;
+ key_status = read_KEY_SPI(ch_C); //to read portA of mcp23s17(2)
+ pc.printf("PORTC button pressed == %d\n",key_status);
+ if(key_status != 0xff)
+ {
+ if(key_status==0xfe)
+ {
+ ctrl_ID = REQ_; //control transfer REQ button pressed
+ CTRL_handler(ctrl_ID);
+ }
+ else
+ {
+ __nop();
+ /*
+ if(key_status==0xfd)
+ set_ID = INC; //setting key INC
+ else if(key_status==0xfb)
+ set_ID = DEC; //setting key DEC
+ else if(key_status==0xf7)
+ set_ID = TEST; //setting key TEST
+ else
+ {
+ set_ID = FALSE2; //setting key TEST
+ ctrl_ID = FALSE1;
+ }
+
+ SET_handler(set_ID);
+ */
+ }
+ }
+}
+void mcp23s17_init()
+{
+ //device1 configuration
+ mcp23s17_1.reset(); //reset on power-up
+ wait_ms(1);
+ mcp23s17_1.iodira(0xff); //set 8-bits PORTA as inputs
+ wait_ms(1);
+ mcp23s17_1.iodirb(0xff); //set 8-bits PORTb as inputs
+ wait_ms(1);
+ mcp23s17_1.ipola(0x00);
+ wait_ms(1);
+ mcp23s17_1.ipolb(0x00);
+ wait_ms(1);
+ mcp23s17_1.gpintena(0xff);
+ wait_ms(1);
+ mcp23s17_1.gpintenb(0xff);
+ wait_ms(1);
+ mcp23s17_1.defvala(0xff);
+ wait_ms(1);
+ mcp23s17_1.defvalb(0xff);
+ wait_ms(1);
+ mcp23s17_1.intcona(0xff); //bank0,mirror disabled, SEQOP disabled, slew rate disabled,HAEN enabled,open drain enabled,interrupt active high,not allowed
+ wait_ms(1);
+ mcp23s17_1.intconb(0xff);
+ wait_ms(1);
+ mcp23s17_1.gppua(0xff);
+ wait_ms(1);
+ mcp23s17_1.gppub(0xff);
+ wait_ms(1);
+
+
+
+ //device2 configuration
+ mcp23s17_2.reset(); //reset on power-up
+ wait_ms(1);
+ mcp23s17_2.iodira(0xff); //set 8-bits PORTA as inputs
+ wait_ms(1);
+ mcp23s17_2.iodirb(0xff); //set 8-bits PORTb as inputs
+ wait_ms(1);
+ mcp23s17_2.ipola(0x00);
+ wait_ms(1);
+ mcp23s17_2.ipolb(0x00);
+ wait_ms(1);
+ mcp23s17_2.gpintena(0xff);
+ wait_ms(1);
+ mcp23s17_2.gpintenb(0x00); //interrupts disabled for address PORT
+ wait_ms(1);
+ mcp23s17_2.defvala(0xff);
+ wait_ms(1);
+ mcp23s17_2.defvalb(0xff);
+ wait_ms(1);
+ mcp23s17_2.intcona(0xff); //bank0,mirror disabled, SEQOP disabled, slew rate disabled,HAEN enabled,open drain enabled,interrupt active high,not allowed
+ wait_ms(1);
+ mcp23s17_2.intconb(0xff);
+ wait_ms(1);
+ mcp23s17_2.gppua(0xff);
+ wait_ms(1);
+ mcp23s17_2.gppub(0xff);
+ wait_ms(1);
+}
+
+void Spi3_Init() //for mcp23s17
+{
+ _SPI3.format(8,0); //8bit,mode 0
+ _SPI3.frequency(1000000); //1mhz
+}
+
+void Led_Init()
+{
+
+ for(uint8_t i=0;i<=8;i++) //cmd led initialisation
+ {
+ LED_CMD[i].set_Brightness(1); //setting period 100 ms
+ wait_ms(1);
+ }
+ for(uint8_t i=0;i<=1;i++) //ctrl led intialisation
+ {
+ LED_CTRL[i].set_Brightness(1);
+ wait_ms(1);
+ }
+ for(uint8_t i=0; i<=7;i++) //ach led initialisation
+ {
+ LED_ACH[i].set_Brightness(1);
+ wait_ms(1);
+ }
+
+ for(uint8_t i=0;i<=8;i++) //cmd led initialisation
+ {
+ LED_CMD[i].ON(); //duty cycle 10%
+ wait_ms(1);
+ }
+ for(uint8_t i=0;i<=1;i++) //ctrl led intialisation
+ {
+ LED_CTRL[i].ON();
+ wait_ms(1);
+ }
+ for(uint8_t i=0; i<=7;i++) //ach led initialisation
+ {
+ LED_ACH[i].ON();
+ wait_ms(1);
+ }
+
+ wait(1);
+
+
+ /* turning all leds OFF*/
+
+
+ for(uint8_t i=0;i<=8;i++) //cmd led initialisation
+ {
+ LED_CMD[i].OFF(); //duty cycle 10%
+ wait_ms(1);
+ }
+ for(uint8_t i=0;i<=1;i++) //ctrl led intialisation
+ {
+ LED_CTRL[i].OFF();
+ wait_ms(1);
+ }
+ for(uint8_t i=0; i<=7;i++) //ach led initialisation
+ {
+ LED_ACH[i].OFF();
+ wait_ms(1);
+ }
+}
+
+int main()
+{
+ char key_status = 0;
+ Led_Init();
+ wait_ms(10);
+ Spi3_Init();
+ wait_ms(10);
+ mcp23s17_init();
+ wait(1);
+
+ int_A.fall(&read_KEY_A); //all key functions enabled for PORTA,B,C
+ wait_ms(2);
+ int_B.rise(&read_KEY_B);
+ wait_ms(2);
+ int_C.rise(&read_KEY_C);
+ wait_ms(2);
+ pc.printf("hello deep\n");
+ wait_ms(10); //this delay is important
+ // LED_CMD[1].FLASHH(); //duty cycle 10%
+ //LED_ACH[1].FLASHH(); //test led
+ key_status = read_KEY_SPI(ch_D); //to read portA of mcp23s17(1)
+ if(key_status == 0xfe)
+ pc.printf("master eot\n");
+ wait_ms(10);
+ LED_ACH[1].FLASHH();
+ wait_ms(10);
+ while(1){
+
+ }
+}
\ No newline at end of file