CC2640pwm驱动 - 欢迎使用测试

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我是靠谱客的博主冷傲萝莉，最近开发中收集的这篇文章主要介绍CC2640pwm驱动 - 欢迎使用测试，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

以下是

CC2640pwm驱动，暂时只写了两个通道，其它定时器及通道类似，欢迎使用测试

如果有疑问可以QQ讨论

/**************************************************************************************************
Filename:
cc2640_pwm.c
Revised:
$Date: 2016-10-01 11:43:11 -0700 (Sat, 01 Otc 2016) $
Revision:
R00
Author:
Mark Xu / QQ:2912615383
Description:
This file contains the pwm driver for cc2640
Copyright 2009 - 2016 Mark Xu Work Studio. All rights reserved.
**************************************************************************************************/
#include <ti/sysbios/family/arm/cc26xx/Power.h>
#include <ti/sysbios/family/arm/cc26xx/PowerCC2650.h>
#include <driverlib/timer.h>
#include <ti/drivers/pin/PINCC26XX.h>
#include <hal_types.h>
/* the output Pin*/
#define PWM_CHAN_TIM0A_PIN
IOID_3
#define PWM_CHAN_TIM0B_PIN
IOID_4
/* the initial value of the duty */
#define PWM_TIM0A_INIT_DUTY
500
#define PWM_TIM0B_INIT_DUTY
500
/* the frequence of the PWM */
#define PWM_FREQUENCE
250000ul
#define PWM_TIM_LOAD_VAL
(uint32_t)(48000000ul / PWM_FREQUENCE)
#define PWM_METCH_VAL(X)
(uint32_t)(PWM_TIM_LOAD_VAL * (1000 - X) / 1000)
PIN_Config PWMPinTable[] =
{
PWM_CHAN_TIM0A_PIN | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_INPUT_DIS | PIN_DRVSTR_MAX,
PWM_CHAN_TIM0B_PIN | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_INPUT_DIS | PIN_DRVSTR_MAX,
PIN_TERMINATE
};
static PIN_Handle pinHandle;
static PIN_State pinState;
static bool PWM_Init_Flag = false;
/**************************************************************************************************
* @fn
board_pwm_init
*
* @brief
pwm initial
*
* @param
None
*
* @return
None
**************************************************************************************************/
void board_pwm_init(void)
{
if(!PWM_Init_Flag)
{
PWM_Init_Flag =true;
// Initial the port
pinHandle = PIN_open(&pinState, PWMPinTable);
//RTOS: Enable peripheral domain and clocks for timer
Power_setDependency(PERIPH_GPT0);
PINCC26XX_setMux(pinHandle, PWM_CHAN_TIM0A, IOC_PORT_MCU_PORT_EVENT0);
PINCC26XX_setMux(pinHandle, PWM_CHAN_TIM0B, IOC_PORT_MCU_PORT_EVENT1);
TimerConfigure(GPT0_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PWM | TIMER_CFG_B_PWM);
HWREG(GPT0_BASE + GPT_O_CTL)
&= ~(GPT_CTL_TAEN | GPT_CTL_TBEN); /* stop the pwm */
HWREG(GPT0_BASE + GPT_O_TAILR)
= PWM_TIM_LOAD_VAL;
HWREG(GPT0_BASE + GPT_O_TAMATCHR) = PWM_METCH_VAL(PWM_TIM0A_INIT_DUTY);
HWREG(GPT0_BASE + GPT_O_TBILR)
= PWM_TIM_LOAD_VAL;
HWREG(GPT0_BASE + GPT_O_TBMATCHR) = PWM_METCH_VAL(PWM_TIM0B_INIT_DUTY);
HWREG(GPT0_BASE + GPT_O_CTL) |= (GPT_CTL_TAEN|GPT_CTL_TBEN);
/* start to
pwm*/
}
}
/**************************************************************************************************
* @fn
pwm_onoff_ctrl
*
* @brief
contol the pwm
*
* @param
sw - the action
*
*
the data type timPwmDef defined as below:
*
typedef enum {
*
TIM0A_ON=0,
*
TIM0A_OFF,
*
TIM0B_ON,
*
TIM0B_OFF,
*
TIM0AB_ON,
*
TIM0AB_OFF
*
}pwmSwDef;
*
* @return
None
**************************************************************************************************/
void pwm_onoff_ctrl(pwmSwDef sw)
{
switch(sw)
{
case TIM0A_ON:
HWREG(GPT0_BASE + GPT_O_CTL) |= GPT_CTL_TAEN;
break;
case TIM0A_OFF:
HWREG(GPT0_BASE + GPT_O_CTL) &= ~GPT_CTL_TAEN;
break;
case TIM0B_ON:
HWREG(GPT0_BASE + GPT_O_CTL) |= GPT_CTL_TBEN;
break;
case TIM0B_OFF:
HWREG(GPT0_BASE + GPT_O_CTL) &= ~GPT_CTL_TBEN;
break;
case TIM0AB_ON:
HWREG(GPT0_BASE + GPT_O_CTL) |= (GPT_CTL_TAEN|GPT_CTL_TBEN);
break;
case TIM0AB_OFF:
HWREG(GPT0_BASE + GPT_O_CTL) &= ~(GPT_CTL_TAEN|GPT_CTL_TBEN);
break;
}
}
/**************************************************************************************************
* @fn
pwm_set_duty
*
* @brief
set the pwm duty
*
* @param
chan - the channel of the pwm
*
*
the data type timPwmDef defined as below:
*
typedef enum{
*
TIM0A_CHAN=0,
*
TIM0B_CHAN,
*
}
*
timPwmDef;
*
*
duty - pwm duty,the value range is :0-1000
*
* @return
None
**************************************************************************************************/
void pwm_set_duty(timPwmDef chan,uint16 duty)
{
if(chan == TIM0A_CHAN)
{
if(duty == 0)
HWREG(GPT0_BASE + GPT_O_TAMATCHR) = PWM_TIM_LOAD_VAL-1;
else if(duty == 1000)
HWREG(GPT0_BASE + GPT_O_TAMATCHR) = (uint32)1;
else
HWREG(GPT0_BASE + GPT_O_TAMATCHR) = PWM_METCH_VAL(duty);
}
else
{
if(duty == 0)
HWREG(GPT0_BASE + GPT_O_TBMATCHR) = PWM_TIM_LOAD_VAL-1;
else if(duty == 1000)
HWREG(GPT0_BASE + GPT_O_TBMATCHR) = (uint32)1;
else
HWREG(GPT0_BASE + GPT_O_TBMATCHR) = PWM_METCH_VAL(duty);
}
}