请问stm32能同时使用多少个蓝牙独立工作？

原子哥  我现在正在搞UART4，5串口  也看到你的寄存器版本的程序  可以写个库函数版本的吗  搞不定下面是我写串口4你看看有什么问题：
void uart4_init(u32 bound)
{
   GPIO_InitTypeDef GPIO_InitStructure;
 USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
 RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE); 
 
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_Init(GPIOC, &GPIO_InitStructure);
 
 
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
 GPIO_Init(GPIOC, &GPIO_InitStructure);
 
 USART_InitStructure.USART_BaudRate = bound;
 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
 USART_InitStructure.USART_StopBits = USART_StopBits_1;
 USART_InitStructure.USART_Parity = USART_Parity_No;
 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; 
 
 USART_Init(UART4, &USART_InitStructure);
 
 USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);
 
 USART_Cmd(UART4, ENABLE);
 
  NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;//NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQChannel;
                                                                            //NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQHandler; 
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//?????3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;//????3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ????
NVIC_Init(&NVIC_InitStructure);//??????????VIC???
}

看不出什么问题哦。

应该是我手机接收问题   用开发板的串口监测是正常发送的    那UART5 也是一样设置吗  要复用到什么管脚？