[SCHEMATIC] Modify SW/MW/LW Preamp, insert galbanic-isolator replace of common-mode...

[openi2cradio/OpenI2CRadio.git] / i2c_io.c

diff --git a/i2c_io.c b/i2c_io.c
index 651b8f1..25627f2 100644 (file)
--- a/i2c_io.c
+++ b/i2c_io.c
@@ -28,46 +28,137 @@
 
 #include <stdarg.h>
 #include <stdio.h>
+#ifdef __SDCC
+#include <delay.h>
+#include <pic18fregs.h>
+#endif
 
 #include "i2c_io.h"
 
+
+
 #ifdef _I2C_IO_TWO_MSSPS
 void i2c1_init(void)
 {
     unsigned char b;
-    b = SSP1CON1;
-    b &= ~(_WCOL | _SSPOV);
-    b = b | _SSPEN | _SSPM3;
+//    b = SSP1CON1;
+    b = _SSPEN | _SSPM3;
     SSP1CON1 = b;
+    SSP1ADD = 19; // Fosc:8000[KHz] / (4 * I2C:Clock:100[KHz]) - 1
+    PIR1bits.SSPIF = 0;
+    PIE1bits.SSPIE = 0;
+    IPR1bits.SSPIP = 1;
 }
 void i2c2_init(void)
 {
     unsigned char b;
-    b = SSP2CON1;
-    b &= ~(_WCOL | _SSPOV);
-    b = b | _SSPEN | _SSPM3;
+    b =  _SSPEN | _SSPM3;
     SSP2CON1 = b;
-
+    SSP2ADD = 4; // Fosc:8000[KHz] / (4 * I2C:Clock:400[KHz]) - 1
 }
-#elif defined(_I2C_IO_ONE_MSSP)
+#else
+ #ifdef _I2C_IO_ONE_MSSP
 void i2c1_init(void)
 {
-    unsigned char b;
-    b = SSPCON1;
-    b &= ~(_WCOL | _SSPOV);
-    b = b | _SSPEN | _SSPM3;
-    SSPCON1 = b;
+ //   unsigned char b;
+//    b = _SSPEN | _SSPM3;
+ //   SSPCON1bits.SSPEN = 1;
+//    SSPCON1bits.SSPM3 = 1;
+//    SSPADD = 4; // Fosc:8000[KHz] / (4 * I2C:Clock:400[KHz]) - 1
+//    SSPSTAT = 0x80;
+    PIR1bits.SSPIF = 0;
+    PIE1bits.SSPIE = 0;
+    IPR1bits.SSPIP = 1;
 }
 void i2c2_init(void)
 {
     i2c1_init();
 }
 
-#else // None MSSP, Software I2C
+ #else // None MSSP, Software I2C
 void i2c1_init(void)
 {
 }
 void i2c2_init(void)
 {
 }
+ #endif
+// I2C_IO
+void i2c_send_byte(unsigned char addr, unsigned char reg, unsigned char data)
+{
+#ifdef __SDCC
+    i2c_open(I2C_MASTER, I2C_SLEW_ON, 5);
+    I2C_START();
+    i2c_writechar(addr);
+    i2c_writechar(reg);
+    i2c_writechar(data);
+    I2C_STOP();
+    i2c_close();
+//    delay100tcy(2);
+#else
+    OpenI2C(MASTER, SLEW_ON);
+    SSPADD = 0x5;
+//    IdleI2C();
+    StartI2C();
+    while (SSPCON2bits.SEN);
+    WriteI2C(addr);
+    while(SSPCON2bits.SEN);
+    WriteI2C(reg);
+    while(SSPCON2bits.SEN);
+    WriteI2C(data);
+    StopI2C();
+    while (SSPCON2bits.PEN);
+    CloseI2C();
+#endif  //    i2c_idle();
+}
+
+unsigned char i2c_read_byte(unsigned char addr, unsigned char reg)
+{
+    unsigned char c;
+  #ifdef __SDCC
+    i2c_open(I2C_MASTER, I2C_SLEW_ON, 5);
+    I2C_START();
+    i2c_writechar(addr);
+    i2c_writechar(reg);
+    I2C_STOP();
+    i2c_idle();
+//   delay100tcy(2);
+    I2C_START();
+    i2c_writechar(addr | 1);
+    c = i2c_readchar();
+    I2C_ACK();
+    I2C_STOP();
+    i2c_close();
+#else
+    OpenI2C(MASTER, SLEW_ON);
+    SSPADD = 0x5;
+    StartI2C();
+    while(SSPCON2bits.SEN);
+    WriteI2C(addr);
+  //  delay1ktcy(8);
+    while(SSPCON2bits.SEN);
+    WriteI2C(reg);
+  //  delay1ktcy(8);
+    StopI2C();
+    IdleI2C();
+    StartI2C();
+    WriteI2C(addr | 1);
+    if (!SSPCON2bits.ACKSTAT){
+      SSPCON2bits.RCEN = 1;
+      while(SSPCON2bits.RCEN);
+      NotAckI2C();
+      while (SSPCON2bits.ACKEN);
+      StopI2C();
+      while (SSPCON2bits.PEN);
+    }
+    c = SSPBUF;
+  //  delay1ktcy(8);
+ //   delay1ktcy(8);
+    CloseI2C();
 #endif
+    //    CLOSEASMASTER();
+    return c;
+
+}
+
+#endif
\ No newline at end of file