Diff: main.cpp

Revision:

0:24d5bc0093ad

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Apr 24 09:44:29 2012 +0000
@@ -0,0 +1,235 @@
+#include "mbed.h"
+
+SPI spi(p11, p12, p13); // mosi, miso, sclk
+DigitalOut cs(p28); // chip select
+DigitalOut ifsel1(p26); // interface select pin for  CLRC6630
+DigitalOut pdres(p27); // CLRC6630 RESET pin - H = RESET
+DigitalOut led[] = {(LED1) , (LED2) , (LED3) , (LED4)}; // onboard LEDs
+Serial pc(USBTX, USBRX); // tx, rx
+
+char r;
+int w = 0;
+//char ATQB0 , ATQB1 , ATQB2 , ATQB3 , ATQB4, ATQB5 , ATQB6 , ATQB7 , ATQB8 , ATQB9, ATQB10 , ATQB11 , ATQB12 , ATQB13 , ATQB14, ATQB15 , ATQB16 , ATQB17 , ATQB18;
+
+ 
+//write SPI registers    
+void write_reg(char n, char o)
+{
+ 
+    cs=0; // device select
+    
+    spi.write (n<<1);
+    spi.write (o);
+    
+    cs=1; // device deselect
+ }
+ 
+
+// read SPI registers
+char read_reg(char n)
+{
+    char t;
+    cs=0; // device select
+    
+    
+    spi.write ((n<<1)|0x01);
+    t=spi.write (0);
+        
+    cs=1; // device deselect
+    
+    return t;
+ }
+ 
+
+//> Terminate any running command. Flush_FiFo
+void terminate_and_flush_FiFo()
+{
+   write_reg( 0x00, 0x00 );
+   write_reg( 0x02, 0xB0 );
+}
+
+
+// Clear all IRQ 0,1 flags
+void clear_IRQ()
+{
+   write_reg( 0x06, 0x7F );
+   write_reg( 0x07, 0x7F );
+} 
+
+
+// Disable Irq 0,1 sources
+void disable_IRQ()
+{
+   write_reg( 0x08, 0x00 );       
+   write_reg( 0x09, 0x00 );
+}
+
+
+//> Wait until the command is finished. Enable IRQ sources.
+void wait_command_and_enable_IRQ()
+{
+   write_reg( 0x08, 0x18 );         // Enable Irqs 0,1
+   write_reg( 0x09, 0x42 );         // Enable the global IRQ to be propagated to the IRQ pin
+            
+   while( (read_reg( 0x07 ) & 0x40)==0);
+}
+
+
+// Read IRQ 0,1 Status register
+void read_IRQ_status()
+{
+   r = read_reg( 0x06 );
+   r = read_reg( 0x07 );
+}
+
+
+// Start tranceive command
+void start_tranceive()
+{
+    write_reg( 0x00, 0x07 );
+    wait(0.001);
+}
+
+ 
+ int main() {
+    
+        //  start activity LED;
+        led[3] = 0;
+        led[2] = 0;
+        led[1] = 0;
+        led[0] = 1;
+                
+        // set the comunication method
+        //ifsel1 = 0; // usare questa istruzione per le schede revisione prototipo
+        ifsel1 = 1; // usare questa istruzione per le schede revisione B
+        wait(0.001);
+    
+        // SPI comunication settings
+        spi.format(8,0);
+        spi.frequency(1000000);
+do {                          
+        //RESET the device
+        pdres = 1;
+        wait(0.001);
+        pdres = 0;
+    
+        wait(0.005);
+                
+//> Load Protocol
+write_reg( 0x0F, 0x98 ); //    Timer0 Timer starts at the end of transmission
+write_reg( 0x37, 0xFF );
+write_reg( 0x14, 0x92 ); //Timer1 Timer starts at the end of transmission
+write_reg( 0x19, 0x20 ); //Timer2
+write_reg( 0x1A, 0x03 ); //TReload Hi
+write_reg( 0x1B, 0xFF ); //TReload Lo
+write_reg( 0x1E, 0x00 ); //Timer3
+write_reg( 0x02, 0x90 ); //FIFO control register ->sets FIFO size to 255bytes
+write_reg( 0x03, 0xFE ); //Waterlevel settings
+write_reg( 0x0C, 0x80 ); //RXBitCtrl (Values AfterColl)
+write_reg( 0x28, 0x87 ); //DrvMode_Reg both driver pins enable, invert one driver
+write_reg( 0x29, 0xCC ); //00  TXAmp_Reg: set continous wave amplitude, set residual carrier
+write_reg( 0x2A, 0x01 ); //DrvCon_Reg: sets driver config to TXEnvelope
+write_reg( 0x2B, 0x05 ); //Txl_Reg: sets iiLoad, was auch immer das ist
+write_reg( 0x34, 0x00 ); //RxSofD_Reg: Subcarrier and SOF detection off
+write_reg( 0x38, 0x12 ); //Rcv_Reg: defines input for signal processing and defines collision level
+
+write_reg( 0x00, 0x00 ); //Idle commmand
+wait(0.02);
+
+write_reg( 0x02, 0xB0 ); //FIFO Control
+
+write_reg( 0x06, 0x7F ); //IRQ0_Reg:
+write_reg( 0x07, 0x7F ); //IRQ1_Reg:
+write_reg( 0x05, 0x04 ); // write Tx and RX protocol numbers (04 for ISO14443B)
+write_reg( 0x05, 0x04 ); // write Tx and RX protocol numbers (04 for ISO14443B)
+write_reg( 0x08, 0x10 ); //IRQ0En_Reg: IdleIrq is enable propagated to GlobalIRQ
+write_reg( 0x09, 0x40 ); //IRQ1En_Reg: GlobalIrq propagated to the interrupt pin
+write_reg( 0x00, 0x0D ); //LoadProtocol
+wait(0.02);
+
+write_reg( 0x08, 0x00 ); //Reset IRQ0
+write_reg( 0x09, 0x00 ); //Reset IRQ1
+write_reg( 0x02, 0xB0 ); //FIFO Control 
+
+// Init registers.
+write_reg( 0x2C, 0x7B ); 
+write_reg( 0x2D, 0x7B ); 
+write_reg( 0x2E, 0x08 );
+write_reg( 0x2F, 0x0A ); //00 
+write_reg( 0x30, 0x00 );
+write_reg( 0x31, 0x01 );
+write_reg( 0x33, 0x05 ); //05
+write_reg( 0x34, 0xB2 );
+write_reg( 0x35, 0x34 );
+write_reg( 0x37, 0x3F ); //3F
+write_reg( 0x38, 0x12 ); // 12
+write_reg( 0x39, 0x0A ); //0A 
+// End of load protocol
+
+        //  start activity LED;
+        led[3] = 0;
+        led[2] = 0;
+        led[1] = 1;
+        led[0] = 0;
+
+//> ==============================================
+//> Field Reset
+//> ==============================================
+
+// Field off: Read out DrvMod register. Disable Drivers
+r = read_reg( 0x28 );   // Response:  87
+  
+write_reg( 0x47, 0x04 );    // DEBUG
+//> phhalHw_FieldOn
+write_reg( 0x28, 0x8F );
+//SLP 100
+wait(0.02);
+
+//> Send REQB command
+write_reg( 0x31, 0xC1 );
+write_reg( 0x32, 0x0B );
+write_reg( 0x00, 0x00 );
+write_reg( 0x02, 0xB0 );
+write_reg( 0x06, 0x7F );
+write_reg( 0x07, 0x7F );
+
+write_reg( 0x05, 0x06 );  // SR176 
+write_reg( 0x05, 0x00 );
+
+/*write_reg( 0x05, 0x00 );  // GMTL
+write_reg( 0x05, 0x0B );
+write_reg( 0x05, 0x3F ); 
+write_reg( 0x05, 0x80 ); */
+
+/*write_reg( 0x05, 0x05 ); //ISO14443B
+write_reg( 0x05, 0x00 );
+write_reg( 0x05, 0x00 );*/
+
+write_reg( 0x00, 0x07 ); // Response:  00
+
+//SLP 100
+wait(0.02);
+
+//RE 04 0C    // Read FIFOLevel (12 bytes)
+r = read_reg( 0x04 );
+//if (r != 0x1B) return;
+
+if( r != 0 )
+    {
+    //  start activity LED;
+    led[3] = 1;
+    led[2] = 0;
+    led[1] = 0;
+    led[0] = 0;
+    pc.printf("received = 0x%02X bytes: ",  r);
+    while( read_reg( 0x04 ) )
+        {
+        pc.printf("%02X ", r = read_reg( 0x05 ));
+        }
+        pc.printf("\r\n",  r);
+    }
+    else
+        pc.printf("NO CARD\r\n");
+        
+} while( -1 );       
+}
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