using uart of cc2540

Hi,

I am trying to send data from msp430 to cc2540 keyfob via uart.

just for test, in msp430 i set baud rate as 115200 with no parity and 1 stop bit, and send a number increment from 1 every second.

and i have modified the code of function "SimpleBLEPeripheral_Init()" in the file simpleBLEPeripheral.c from the project "simpleBLEPeripheral".

the modified part is as shown below:

#if defined( CC2540_MINIDK )

.....

.....

#endif // #if defined( CC2540_MINIDK )
 

//
   P0SEL = 0;    // Configure Port 0 as GPIO
  P1SEL = 0x30; // Configure Port 1 as GPIO, except P1.4 P1.5 for uart
  P2SEL = 0;    // Configure Port 2 as GPIO

  P0DIR = 0xFC; // Port 0 pins P0.0 and P0.1 as input (buttons),
                // all others (P0.2-P0.7) as output
  P1DIR = 0xFF; // All port 1 pins (P1.0-P1.7) as output
  P2DIR = 0x1F; // All port 1 pins (P2.0-P2.4) as output

  P0 = 0x03; // All pins on port 0 to low except for P0.0 and P0.1 (buttons)
  P1 = 0;   // All pins on port 1 to low
  P2 = 0;   // All pins on port 2 to low

// the part above is in the "#if defined( CC2540_MINIDK )" part originally, i move it out and change some value to define P1.4 and P1.5 as uart ports

    PERCFG |= 0x01;     //usart0 alt.2
    
    
    U0GCR = 0x0b;
    U0BAUD = 216;
    U0CSR = 0x80;       //uart mode
    U0UCR = 0x02;       //low start bit, high end bit
    
    
    U0CSR |= 0x40;

....

....

and i also modified the function "performPeriodicTask()" as shown below.

static void performPeriodicTask( void )
{
  uint16 i;

  i = U0DBUF;           // only LSB 8 bits used
 
 
    SimpleProfile_SetParameter( SIMPLEPROFILE_CHAR4, sizeof(uint16), &i);
  }
}

i have modified this function to perform the notification with 2 bytes every time as show above, and this works properly since i have tried to send a number increment from 1 every second derectly from the cc2540 keyfob to Btool.

Since I have modified the period of the function as 1000ms, which is just same with the period msp sending datas via uart; thus i did not use at interupt or anything else, but just read the buffer during each period task.

However, whatever i send from msp430, the data Btool receives is always 0 at first for tens seconds, and then may change to 3, and at last becomes 0xFF later.