Revision 3:5d19d3a231b3, committed 2018-07-15

Comitter:

sgrsn

Date:

Sun Jul 15 14:20:26 2018 +0000

Parent:

2:0dff052266ca

Commit message:

i2c slave class to RaspberryPi with interrupt

Changed in this revision

--- a/i2cslave.cpp	Thu Jul 12 10:17:19 2018 +0000
+++ b/i2cslave.cpp	Sun Jul 15 14:20:26 2018 +0000
@@ -1,27 +1,28 @@
 #include "i2cslave.h"
 
 /*example*************************************************
-
 #include "mbed.h"
 #include "i2cslave.h"
 
-int32_t Registar[0x20];
-i2cslave i2c(p28, p27, Registar);
-    
+#define ADDR 0x1D
+#define _ADDR ADDR<<1   //on raspi
+
+union U{
+    int8_t _Registar[0x40];
+    int32_t Registar[0x10];
+};
+union U u = { 0 };
+i2cslave slave(p28, p27, u._Registar);
+Serial PC(USBTX, USBRX);
+
 int main()
 {
-    i2c.address(0xa0);
-    Registar[10] = 0;
-    while(1)
-    {
-        printf("%d\r\n", Registar[0]);
-        Registar[1] = 1234;
-        wait_ms(500);
-        Registar[1] = 5678;
-        wait_ms(500);
+    slave.address(_ADDR);
+    while(1){
+        PC.printf("%d, %d\r\n", u.Registar[0], u.Registar[1]);
+        wait_ms(100);
     }
 }
-
 **********************************************************/
 
 #if DEVICE_I2CSLAVE
@@ -30,7 +31,7 @@
 
 i2cslave* instance;
 
-i2cslave::i2cslave(PinName sda, PinName scl, int32_t *_Registar) : I2CSlave(sda, scl)
+i2cslave::i2cslave(PinName sda, PinName scl, int8_t *_Registar) : I2CSlave(sda, scl)
 {
     frequency(400000);
     i2cslave::attach(this, &i2cslave::getdata);
@@ -41,38 +42,34 @@
 {
     if(I2CSlave::receive()==I2CSlave::WriteAddressed)
     {
-        char DATA[2] = {}; 
-        I2CSlave::read(DATA,2);
+        char DATA[3] = {}; 
+        I2CSlave::read(DATA, 3);
         char reg=DATA[0];
-        char num =DATA[1]; 
-        char X[num];
-        for(int i = 0; i < num; i++)X[i] = 0;
-        int32_t tmp = 0;
-        wait_us(50);
-        switch(I2CSlave::receive())
+        char size =DATA[1];
+        char cmd = DATA[2];
+        char X[size];
+        for(int i = 0; i < size; i++)X[i] = 0;
+        int8_t tmp = 0;
+        //wait_us(50);  //to mbed devices
+        wait_us(500);   //to RaspberryPi
+        switch(cmd)
         {
-            case 0 :break;
-            case I2CSlave::ReadAddressed:
-            {
-                int32_t tmp = *(Registar+reg);
-                for(int i = 0; i < num; i++)
+            case ReadRequired:
+                I2CSlave::read(X, size);
+                for(int i = 0; i < size; i++)
                 {
-                    X[i] = (tmp >> i*8) & 0xFF;
+                    *(Registar+reg*4+i) = X[i];
                 }
-                I2CSlave::write(X,num);
                 break;
-            }
-            case I2CSlave::WriteGeneral:break;
-            case I2CSlave::WriteAddressed:
-            {
-                I2CSlave::read(X, num);
-                for (int i=0; i < num; i++)
-                {
-                    tmp |= X[i] << (i*8);
-                }
-                *(Registar+reg) = tmp;
+
+            case WriteRequired:
+                I2CSlave::read(DATA, 1);    //捨て受信
+                
+                int8_t tmp = *(Registar+reg);
+                I2CSlave::write(tmp);
+                I2CSlave::write(tmp);
+                I2CSlave::write(tmp);
                 break;
-            }
         }
     }
 }

--- a/i2cslave.h	Thu Jul 12 10:17:19 2018 +0000
+++ b/i2cslave.h	Sun Jul 15 14:20:26 2018 +0000
@@ -3,13 +3,17 @@
 
 #include "mbed.h"
 
+#define ReadRequired 1
+#define WriteRequired 2
+
 namespace mbed {
     
 class i2cslave : public I2CSlave
 {
 public:
-    int32_t *Registar;
-    i2cslave(PinName sda, PinName scl, int32_t *Registar);
+    int8_t *Registar;
+    int log[10];
+    i2cslave(PinName sda, PinName scl, int8_t *Registar);
      
      void getdata();