TIMER[1 | 2] Command {Value {, Value}}

Function
Configures the SX48/52 Multi-Function timer T1 (TIMER1) or T2 (TIMER2).

• Command is a timer configuration command (see below).
• Value is a byte or word constant/variable as required by Command.

Quick Facts

I/O Pin	Function
RB.4	Timer T1 Capture Input 1
RB.5	Timer T1 Capture Input 2
RB.6	Timer T1 PWM/Compare Output
RB.7	Timer T1 External Event Clock Source
RC.0	Timer T2 Capture Input 1
RC.1	Timer T2 Capture Input 2
RC.2	Timer T2 PWM/Compare Output
RC.3	Timer T2 External Event Clock Source

TIMER Commands

TIMER[1 | 2] CLEAR

Clears the hardware timer/counter.

TIMER[1 | 2] PRESCALE Value

Sets the hardware timer/counter prescaler. Value is a constant as defined in the table below.

Value	Prescaler
0	1:1
1	1:2
2	1:4
3	1:8
4	1:16
5	1:32
6	1:64
7	1:128

TIMER[1 | 2] R1 Value

Sets the hardware timer/counter R1 register. Value is a byte or word constant/variable.

TIMER[1 | 2] R2 Value

Sets the hardware timer/counter R2 register. Value is a byte or word constant/variable.

TIMER[1 | 2] TIMER

Sets the hardware timer/counter to "Software Timer" mode.

TIMER[1 | 2] PWM OnCycles, PeriodCycles

Sets the hardware timer/counter to "PWM" mode. OnCycles is loaded into timer register R1, and PeriodCycles - OnCycles is loaded into register R2. Note that you must make the PWM pin an output. OnCycles and PeriodCycles are byte or word constants/variables.

The example below illustrates the use the of PWM option to modulate an IR LED at 38 kHz:

DEVICE          SX48, OSCXT1
FREQ            4_000_000

IrLed           VAR     RB.6

PROGRAM Start

Start:
  OUTPUT IrLed                                  ' enable LED output
  TIMER1 PWM, 52, 105                           ' modulate at 38 kHz, 50%
  DO
    ' additional program statements
  LOOP
  END

TIMER[1 | 2] CAPTURE

Sets the hardware timer/counter to "Capture/Compare" mode.

TIMER[1 | 2] EXTERNAL

Sets the hardware timer/counter to "External Event" mode.