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mikroPascal PRO for dsPIC30/33 and PIC24
MikroElektronika
452
Soft_I2C_Break
Prototype
procedure Soft_I2C_Break();
Description All Software I²C Library functions can block the program ow (see note at the top of this page). Calling
this routine from interrupt will unblock the program execution. This mechanism is similar to WDT.
Parameters None.
Returns Nothing.
Requires Nothing.
Example
var data1, error, counter : byte;
procedure Timer1Int(); org IVT_ADDR_T1INTERRUPT;
begin
counter := 0;
if (counter >= 20)
begin
Soft_I2C_Break();
counter := 0; // reset counter
end
else
Inc(counter); // increment counter
T1IF_bit := 0; // Clear Timer1 overow interrupt ag
end;
begin
...
// try Soft_I2C_Init with blocking prevention mechanism
IPC0 := IPC0 or 0x1000; // Interrupt priority level = 1
T1IE_bit := 1; // Enable Timer1 interrupts
T1CON := 0x8030; // Timer1 ON, internal clock FCY, prescaler
1:256
Soft_I2C_Init();
T1IE_bit := 0; // Disable Timer1 interrupts
end.
Notes Interrupts should be disabled before using Software I²C routines again (see note at the top of this
page).