CC2640学习-PWM驱动

自己整理的CC2640的PWM驱动，目前只写了两通道，其它通道设置相同，欢迎测试，先做个备份，回头详细整理：

/**************************************************************************************************
  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);
  }
}