25.4.3.2 Gated Timer Initialization Steps
The following steps must be performed to configure the timer for Gated Timer mode:
- Clear the TON Control bit (TxCON[15] = 0) to disable the timer.
- Clear the TCS Control bit (TxCON[1] = 0) to select the internal system clock source.
- Set the TGATE Control bit (TxCON[7] = 1) to enable Gated Timer mode.
- Select the desired prescaler.
- Clear the Timer register, TMRx.
- Load the Timer Period register, PRx, with the desired 32-bit match value.
- If interrupts are used:
- Clear the TxIF Interrupt Flag bit in the IFSx register.
- Configure the Interrupt Priority Levels in the IPCx register.
- Set the TxIE Interrupt Enable bit in the IECx register.
8. Set the TON Control bit (TxCON[15] = 1) to enable the timer.
Gated Timer Example Code
T1CON = 0x0; // Stop timer and clear control register T1CON = 0x00000080; // Gated Timer mode, prescaler at 1:1, internal clock source TMR1 = 0x0; // Clear timer register PR1 = 0xFFFFFFFF; // Load period register with 32-bit match value T1CONbits.ON = 1; // Start timer