STM32F100RC TIM14 PWM无法输出

Aaron-2050553 提问时间：2013-10-22 19:45 /

使用PB1将TIM14 REMAP过来，代码如下
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_TIM14,ENABLE);

GPIO_InitTypeDef GPIO_InitStructure;
/* TIM4_CH1 pin (PB.06) configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
RETAILMSG(DBG_INFO,("BEEP_GPIO_Configuration enable\r\n\r\n"));
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

/* Compute the value to be set in ARR regiter to generate signal frequency at 17.57 Khz */
BeepTimerPeriod = (SystemCoreClock / (24000000) ) - 1;
/* Compute CCR1 value to generate a duty cycle at 50% for channel 1 and 1N */
// BeepChannel1Pulse = (uint16_t) (((uint32_t) 1 * (BeepTimerPeriod - 1)) / 2);
/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Period = 655;
TIM_TimeBaseStructure.TIM_Prescaler = BeepTimerPeriod;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM14, &TIM_TimeBaseStructure);
/* Channel 1, 2,3 and 4 Configuration in PWM mode */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 333;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM14, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM14, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM14, ENABLE);
RETAILMSG(DBG_INFO,("TIM14 enable\r\n\r\n"));

/* TIM1 counter enable */
TIM_Cmd(TIM14, ENABLE);

请大神协助，与参考代码对比了好多次，都没看出问题。