高手进！USB的蓝牙适配器与8051F单片机连接应用问题

只看该作者 · 2010-3-10 11:45

本帖最后由 RUnewhand 于 2010-3-10 16:40 编辑

单片机实验板和蓝牙适配器（清华紫光25元一个）连接，用的是两头都是母口接口。如图：
基于HCI层协议，通过UART0向蓝牙发送reset指令：即 01 03 0C 00 按道理来说应该返回：040E0401030C00（指令完成）。但蓝牙模块没有任何反应。部分程序如下（串口初始化已经完成）：我设置的串口通讯速率为9600bps，8位数据位，1位停止。

  void main (void) {
  PCA0MD &= ~0x40;                   // Disable Watchdog timer
SYSTEMCLOCK_Init ();             // initialize oscillator
PORT_Init ();                      // initialize crossbar and GPIO
  TH1 = -(SYSCLK/BAUDRATE0/2/12);
  CKCON &= ~0x0B;
  SCON= 0x30;
TL1 = TH1;                         // init Timer1
TMOD &= ~0xf0;                   // TMOD: timer 1 in 8-bit autoreload
TMOD |=  0x20;
TR1 = 1;                         // START Timer1
IP |= 0x10;                      // Make UART high priority
TI0 = 0;
ES0 = 1;                         // Enable UART0 interrupts
SBUF0 = 0x01;
while(!TI0);
TI0 = 0;
SBUF0 = 0x03;
while(!TI0);
TI0 = 0;
SBUF0 = 0x0c;
while(!TI0);
TI0 = 0;
SBUF0 = 0x00;
while(!TI0);
TI0 = 0;
EA = 1;
ES0 = 1;
while (1)；//等待返回命令
}
void SYSTEMCLOCK_Init (void)
{
OSCICN |= 0x03;                   // Configure internal oscillator for
                                    // its maximum frequency and enable
                                    // missing clock detector
CLKMUL  = 0x00;                   // Select internal oscillator as
                                    // input to clock multiplier
CLKMUL |= 0x80;                   // Enable clock multiplier
Delay();                         // Delay for clock multiplier to begin
CLKMUL |= 0xC0;                   // Initialize the clock multiplier
Delay();                         // Delay for clock multiplier to begin
while(!(CLKMUL & 0x20));          // Wait for multiplier to lock
CLKSEL  = 0x03;                   // Select system clock
}

void PORT_Init (void)
{
XBR0 = 0x01;                      // route UART 0 to crossbar
XBR2 = 0x01;                      // route UART 1 to crossbar
XBR1 = 0x40;                      // enable crossbar
P0MDOUT |= 0x11;                   // set P0.4 to push-pull output
P0MDOUT |= 0x0f;
P2MDOUT |= 0x04;                   // set LED to push-pull
P2MDIN |= 0x0F;                   // Lower four pins on P2 are digital
P2MDOUT = 0x0C;                   // enable LEDs as push-pull outputs
                                    // enable Switches as open-drain
P2    |= 0x03;                   // Set port latches for P2.0
                                    // and P2.1 to '1'
}

请问是哪里出了问题？