src/main/drivers/timer_stm32f10x.c

   1 /*
   2   modified version of StdPeriph function is located here.
   3   TODO - what license does apply here?
   4   original file was lincesed under MCD-ST Liberty SW License Agreement V2
   5   http://www.st.com/software_license_agreement_liberty_v2
   6 */
   7
   8 #include "stm32f10x.h"
   9
  10 /**
  11   * @brief  Selects the TIM Output Compare Mode.
  12   * @note   This function does NOT disable the selected channel before changing the Output
  13   *         Compare Mode.
  14   * @param  TIMx: where x can be 1 to 17 except 6 and 7 to select the TIM peripheral.
  15   * @param  TIM_Channel: specifies the TIM Channel
  16   *   This parameter can be one of the following values:
  17   *     @arg TIM_Channel_1: TIM Channel 1
  18   *     @arg TIM_Channel_2: TIM Channel 2
  19   *     @arg TIM_Channel_3: TIM Channel 3
  20   *     @arg TIM_Channel_4: TIM Channel 4
  21   * @param  TIM_OCMode: specifies the TIM Output Compare Mode.
  22   *   This parameter can be one of the following values:
  23   *     @arg TIM_OCMode_Timing
  24   *     @arg TIM_OCMode_Active
  25   *     @arg TIM_OCMode_Toggle
  26   *     @arg TIM_OCMode_PWM1
  27   *     @arg TIM_OCMode_PWM2
  28   *     @arg TIM_ForcedAction_Active
  29   *     @arg TIM_ForcedAction_InActive
  30   * @retval None
  31   */
  32
  33 #define CCMR_Offset                 ((uint16_t)0x0018)
  34
  35 void TIM_SelectOCxM_NoDisable(TIM_TypeDef* TIMx, uint16_t TIM_Channel, uint16_t TIM_OCMode)
  36 {
  37   uint32_t tmp = 0;
  38
  39   /* Check the parameters */
  40   assert_param(IS_TIM_LIST8_PERIPH(TIMx));
  41   assert_param(IS_TIM_CHANNEL(TIM_Channel));
  42   assert_param(IS_TIM_OCM(TIM_OCMode));
  43
  44   tmp = (uint32_t) TIMx;
  45   tmp += CCMR_Offset;
  46
  47   if((TIM_Channel == TIM_Channel_1) ||(TIM_Channel == TIM_Channel_3))
  48   {
  49     tmp += (TIM_Channel>>1);
  50
  51     /* Reset the OCxM bits in the CCMRx register */
  52     *(__IO uint32_t *) tmp &= (uint32_t)~((uint32_t)TIM_CCMR1_OC1M);
  53
  54     /* Configure the OCxM bits in the CCMRx register */
  55     *(__IO uint32_t *) tmp |= TIM_OCMode;
  56   }
  57   else
  58   {
  59     tmp += (uint16_t)(TIM_Channel - (uint16_t)4)>> (uint16_t)1;
  60
  61     /* Reset the OCxM bits in the CCMRx register */
  62     *(__IO uint32_t *) tmp &= (uint32_t)~((uint32_t)TIM_CCMR1_OC2M);
  63
  64     /* Configure the OCxM bits in the CCMRx register */
  65     *(__IO uint32_t *) tmp |= (uint16_t)(TIM_OCMode << 8);
  66   }
  67 }