STM32库函数TIM_CCxCmd()和TIM_CCxNC

 2015年9月7日，在使用pwm时，调试发现stm32 v3.5的库有几个函数有问题。下载了stm32 v3.61的库,也是同样的问题，于是自己修改这个bug。

  stm32库函数tim_ccxcmd()和tim_ccxncmd()错误修改： /**   * @brief  enables or disables the tim capture compare channel x.   * @param  timx: where x can be 1 to 17 except 6 and 7 to select the tim peripheral.   * @param  tim_channel: specifies the tim channel   *   this parameter can be one of the following values:   *     @arg tim_channel_1: tim channel 1   *     @arg tim_channel_2: tim channel 2   *     @arg tim_channel_3: tim channel 3   *     @arg tim_channel_4: tim channel 4   * @param  tim_ccx: specifies the tim channel ccxe bit new state.   *   this parameter can be: tim_ccx_enable or tim_ccx_disable.   * @retval none   */ void tim_ccxcmd(tim_typedef* timx, uint16_t tim_channel, uint16_t tim_ccx) {   uint16_t tmp = 0;     /* check the parameters */   assert_param(is_tim_list8_periph(timx));   assert_param(is_tim_channel(tim_channel));   assert_param(is_tim_ccx(tim_ccx));     tmp = ccer_cce_set << tim_channel;    /* reset the ccxe bit */   timx->ccer &= (uint16_t)~ tmp;     /* set or reset the ccxe bit */   //timx->ccer |=  (uint16_t)(tim_ccx << tim_channel); //原来的库函数错误 //修改为: if(tim_ccx==enable) timx->ccer |= tmp; }   /**   * @brief  enables or disables the tim capture compare channel xn.   * @param  timx: where x can be 1, 8, 15, 16 or 17 to select the tim peripheral.   * @param  tim_channel: specifies the tim channel   *   this parameter can be one of the following values:   *     @arg tim_channel_1: tim channel 1   *     @arg tim_channel_2: tim channel 2   *     @arg tim_channel_3: tim channel 3   * @param  tim_ccxn: specifies the tim channel ccxne bit new state.   *   this parameter can be: tim_ccxn_enable or tim_ccxn_disable.   * @retval none   */ void tim_ccxncmd(tim_typedef* timx, uint16_t tim_channel, uint16_t tim_ccxn) {   uint16_t tmp = 0;     /* check the parameters */   assert_param(is_tim_list2_periph(timx));   assert_param(is_tim_complementary_channel(tim_channel));   assert_param(is_tim_ccxn(tim_ccxn));     tmp = ccer_ccne_set << tim_channel;     /* reset the ccxne bit */   timx->ccer &= (uint16_t) ~tmp;     /* set or reset the ccxne bit */   //timx->ccer |=  (uint16_t)(tim_ccxn << tim_channel); //原来的库函数错误 //修改为: if(tim_ccxn==enable) timx->ccer |=  tmp; }