PIC32MX Timer

PIC32MXには5個の16bitTimerが実装されている。
Timer2/3，4/5はペアで使用して32bitTimerとしても使用可能。

Timerに関しては準備されているライブラリを活用した方が
手っ取り早いので，関数群について記載しておく。
マクロが定義されているtimer.hの内容を読めばそれが間違いない。
以下はtimer.hからの抜粋。

Timer1

OpenTimer1，ConfigIntTimer1
で制御

<Example>
OpenTimer1(T1_ON|T1_SOURCE_INT|T1_PS_1_256, 1000);
ConfigIntTimer1(T1_INT_ON|T1_INT_PRIOR_2); // 割り込み許可|優先順位

INTEnableSystemMultiVectoredInt(); // 全割り込み許可

void __ISR(_TIMER_1_VECTOR,ipl2) T1Handler(void) {
mT1ClearIntFlag();
return;
}

#define OpenTimer1(config, period)
/******************************************************************************
* Available options for config parameter
*****************************************************************************/
// On/off control – values are mutually exclusive
#define T1_ON/* Timer1 ON */
#define T1_OFF

// Stop-in-idle control – values are mutually exclusive
#define T1_IDLE_STOP/* stop during idle */
#define T1_IDLE_CON/* operate during idle */

// Asynchronous write control – values are mutually exclusive
#define T1_TMWDIS_ON/* Asynchronous Write Disable */
#define T1_TMWDIS_OFF

// Timer gate control – values are mutually exclusive
#define T1_GATE_ON/* Timer Gate accumulation mode ON */
#define T1_GATE_OFF

// Timer prescaler control – values are mutually exclusive
#define T1_PS_1_256/* Prescaler 1:256 */
#define T1_PS_1_64/* 1:64 */
#define T1_PS_1_8/* 1:8 */
#define T1_PS_1_1/* 1:1 */

// Sync option – values are mutually exclusive
#define T1_SYNC_EXT_ON/* Synch external clk input */
#define T1_SYNC_EXT_OFF

// Source selection – values are mutually exclusive
#define T1_SOURCE_EXT/* External clock source */
#define T1_SOURCE_INT/* Internal clock source */
/***********************************
* End config parameter values
************************************/

#define ConfigIntTimer1(config)
/******************************************************************************
* Available options for config parameter
*****************************************************************************/
// Interrupt on/off – values are mutually exclusive
#define T1_INT_ON
#define T1_INT_OFF

// Interrupt priority – values are mutually exclusive
#define T1_INT_PRIOR_7
#define T1_INT_PRIOR_6
#define T1_INT_PRIOR_5
#define T1_INT_PRIOR_4
#define T1_INT_PRIOR_3
#define T1_INT_PRIOR_2
#define T1_INT_PRIOR_1
#define T1_INT_PRIOR_0

// Interrupt sub-priority – values are mutually exclusive
#define T1_INT_SUB_PRIOR_3
#define T1_INT_SUB_PRIOR_2
#define T1_INT_SUB_PRIOR_1
#define T1_INT_SUB_PRIOR_0
/***********************************
* End config parameter values
************************************/

Timer2,3,4,5

OpenTimer2，ConfigIntTimer2

OpenTimer3，ConfigIntTimer3

OpenTimer4，ConfigIntTimer4

OpenTimer5，ConfigIntTimer5

で制御

<Example>
　OpenTimer2(T2_ON | T2_IDLE_ON | T2_PS_1_4, 123);
　ConfigIntTimer2(T2_INT_ON | T2_INT_PRIOR_3 | T2_INT_SUB_PRIOR1);

定義はTimer2のもの。Timer3,4,5は2を読みかえればOK。

#define OpenTimer2(config, period)
/******************************************************************************
* Available options for config parameter
*****************************************************************************/
// On/off control – values are mutually exclusive
#define T2_ON/* Timer2 ON */
#define T2_OFF

// Stop-in-idle control – values are mutually exclusive
#define T2_IDLE_STOP/* stop during idle */
#define T2_IDLE_CON/* operate during idle */

// Timer gate control – values are mutually exclusive
#define T2_GATE_ON/* Timer Gate accumulation mode ON */
#define T2_GATE_OFF

// Prescale values – values are mutually exclusive
#define T2_PS_1_256/* Prescaler 1:256 */
#define T2_PS_1_64/* 1:64 */
#define T2_PS_1_32/* 1:32 */
#define T2_PS_1_16/* 1:16 */
#define T2_PS_1_8/* 1:8 */
#define T2_PS_1_4/* 1:4 */
#define T2_PS_1_2/* 1:2 */
#define T2_PS_1_1/* 1:1 */

// 32-bit or 16-bit – values are mutually exclusive
#define T2_32BIT_MODE_ON/* Enable 32-bit mode */
#define T2_32BIT_MODE_OFF

// Sync external clock option – values are mutually exclusive
#define T2_SOURCE_EXT/* External clock source */
#define T2_SOURCE_INT/* Internal clock source */
/***********************************
* End config parameter values
************************************/

#define ConfigIntTimer2(config)
/******************************************************************************
* Available options for config parameter
*****************************************************************************/
// Interrupt on/off – values are mutually exclusive
#define T2_INT_ON/* T2 Interrupt Enable */
#define T2_INT_OFF

// Interrupt priority – values are mutually exclusive
#define T2_INT_PRIOR_7
#define T2_INT_PRIOR_6
#define T2_INT_PRIOR_5
#define T2_INT_PRIOR_4
#define T2_INT_PRIOR_3
#define T2_INT_PRIOR_2
#define T2_INT_PRIOR_1
#define T2_INT_PRIOR_0

// Interrupt sub-priority – values are mutually exclusive
#define T2_INT_SUB_PRIOR_3
#define T2_INT_SUB_PRIOR_2
#define T2_INT_SUB_PRIOR_1
#define T2_INT_SUB_PRIOR_0
/***********************************
* End config parameter values
************************************/

Timer2/3,4/5

OpenTimer23，ConfigIntTimer23

OpenTimer45，ConfigIntTimer45

で制御

<Example>
OpenTimer23(T23_ON|T23_SOURCE_INT|T23_PS_1_16|T23_32BIT_MODE_ON, 3579545);

ConfigIntTimer23(T23_INT_ON|T23_INT_PRIOR_2); // 割り込み許可|優先順位

INTEnableSystemMultiVectoredInt(); // 全割り込み許可

void __ISR(_TIMER_23_VECTOR,ipl2) T23Handler(void) {

mT23ClearIntFlag();

return;

}

定義はTimer23のもの。Timer45は23を読みかえればOK。

#define OpenTimer23(config, period)
/******************************************************************************
* Available options for config parameter
*****************************************************************************/
// On/off control – values are mutually exclusive
#define T23_ON/* Timer2 ON */
#define T23_OFF

// Stop-in-idle control – values are mutually exclusive
#define T23_IDLE_STOP/* stop during idle */
#define T23_IDLE_CON/* operate during idle */

// Timer gate control – values are mutually exclusive
#define T23_GATE_ON/* Timer Gate accumulation mode ON */
#define T23_GATE_OFF

// Prescale values – values are mutually exclusive
#define T23_PS_1_256/* Prescaler 1:256 */
#define T23_PS_1_64/* 1:64 */
#define T23_PS_1_32/* 1:32 */
#define T23_PS_1_16/* 1:16 */
#define T23_PS_1_8/* 1:8 */
#define T23_PS_1_4/* 1:4 */
#define T23_PS_1_2/* 1:2 */
#define T23_PS_1_1/* 1:1 */

// 32-bit or 16-bit – values are mutually exclusive
#define T23_32BIT_MODE_ON/* Enable 32-bit mode */
#define T23_32BIT_MODE_OFF

// Sync external clock option – values are mutually exclusive
#define T23_SOURCE_EXT/* External clock source */
#define T23_SOURCE_INT/* Internal clock source */
/***********************************
* End config parameter values
************************************/

#define ConfigIntTimer23(config)
/******************************************************************************
* Available options for config parameter
*****************************************************************************/
// Interrupt on/off – values are mutually exclusive
#define T23_INT_ON/* Interrupt Enable */
#define T23_INT_OFF

// Interrupt priority – values are mutually exclusive
#define T23_INT_PRIOR_7
#define T23_INT_PRIOR_6
#define T23_INT_PRIOR_5
#define T23_INT_PRIOR_4
#define T23_INT_PRIOR_3
#define T23_INT_PRIOR_2
#define T23_INT_PRIOR_1
#define T23_INT_PRIOR_0

// Interrupt sub-priority – values are mutually exclusive
#define T23_INT_SUB_PRIOR_3
#define T23_INT_SUB_PRIOR_2
#define T23_INT_SUB_PRIOR_1
#define T23_INT_SUB_PRIOR_0
/***********************************
* End config parameter values
************************************/