CC2540-->usb-RS232 converter-->PC

hi,

I have 2 device CC2540 and CC2541keyforb.

I want to interface sensor, which give me data on RX/TX pin of uart.

For this what project I need from the following project which is available at  location: C:\Texas Instruments\BLE-CC254x-1.4.0\Projects\ble.

I read the user guuide named as CC2540/41 System-on-Chip Solution for 2.4-GHz Bluetooth® low energy Applications and understand which configuration i need. but where I have to intialize and where I can use API's like UART_Write() or UART_Read that i can't understand.

After flashing the program i Connect hardware in following manner.

1. I draw two wire from CC2540 test pin P0.2,P03 for Rx/Tx  and connect it to Rx/Tx of USB-RS232 connector.

2. i draw two wire from CC2540 VCC and GND from CC2540 Debug pins (pin 1 and pin2) and connect it to VCC,GND of USB-RS232 connector.

then connect serial cable to PC serial port. and open hyper terminal with desired setting like COM1, desired baud rate, parity and flow control are none and 1 start and stop bit.

But after doing this when I connect  CC2540 to PC USB port of PC, I don't  get  any data(writteb on UART using HAL_UARTWrite API) on hyperterminal which I open.

I do following Code :

------------------------------------------------------------------------------------------------------------------------

In new file uart.c:

  /****************************************************************************
    * Clock setup
    * See basic software example "clk_xosc_cc254x"
    */
 
    // Set system clock source to HS XOSC, with no pre-scaling.
    CLKCONCMD = (CLKCONCMD & ~(CLKCON_OSC | CLKCON_CLKSPD)) | CLKCON_CLKSPD_32M;
    // Wait until clock source has changed.
    while (CLKCONSTA & CLKCON_OSC);
 
    /* Note the 32 kHz RCOSC starts calibrating, if not disabled. */

 
    /***************************************************************************
    * Setup I/O ports
    *
    * Port and pins used by USART0 operating in UART-mode, at the Alternative 1
    * location are:
    * RX     : P0_2
    * TX     : P0_3
    * CT/CTS : P0_4
    * RT/RTS : P0_5
    *
    * These pins must be set to function as peripheral I/O to be used by UART0.
    * The TX pin on the transmitter must be connected to the RX pin on the receiver.
    * If enabling hardware flow control (U0UCR.FLOW = 1) the CT/CTS (Clear-To-Send)
    * on the transmitter must be connected to the RS/RTS (Ready-To-Send) pin on the
    * receiver.
    */
#if (chip==2541 || chip==2543 || chip==2545)
    // Configure USART0 for Alternative 1 => Port P0 (PERCFG.U0CFG = 0).
    PERCFG = (PERCFG & ~PERCFG_U0CFG) | PERCFG_U0CFG_ALT1;    
#endif
        
#if (chip==2541)
    // Give priority to USART 0 over Timer 1 for port 0 pins.
    P2DIR &= P2DIR_PRIP0_USART0;
#elif (chip==2543 || chip==2545)
    // Give priority to USART 0 over Timer 1 for port 0 pins.
    PPRI &= ~PPRI_PRI0P0;
#endif

#if (chip==2541 || chip==2543 || chip==2545)
    // Set pins 2, 3 and 5 as peripheral I/O and pin 4 as GPIO output.
    P0SEL |= BIT5 | BIT4 | BIT3 | BIT2;
#elif (chip==2544)
    // Set pins 1, 2 and 3 as peripheral I/O and pin 0 as GPIO output.
    P0SEL0 = 0x11;        // Map P0_0 and P0_1 as UASRT0.
    P0SEL1 = 0x11;        // Map P0_3 and P0_2 as UASRT0.
#elif (chip == 2540)
    // Configure UART0 for Alternative 1 => Port P0 (PERCFG.U0CFG = 0)
    PERCFG &= ~0x01;
    // Configure relevant Port P0 pins for peripheral function:
    // P0SEL.SELP0_2/3/4/5 = 1 => RX = P0_2, TX = P0_3, CT = P0_4, RT = P0_5
    P0SEL |= 0x3C;
    // Configure relevant Port P1 pins back to GPIO function
    P1SEL &= ~0x3C;
#endif
     
    
#if (chip==2541 || chip==2543 || chip==2545)
    // Initialize P0_1 for SRF05EB S1 button.
    P0SEL &= ~BIT1;           // Function as General Purpose I/O.
    P0DIR &= ~BIT1;           // Input.
#elif (chip==2544)
    // Initialize P0_1 for SRF05EB S1 button.
    P0SEL0 &= ~P0SEL0_SELP0_1;// Function as General Purpose I/O.
    PDIR &= ~PDIR_DIRP0_1;    // Input.
#endif
 
    /***************************************************************************
    * Configure UART
    *
    */
    // Initialise bitrate = 57.6 kbps.
    U0BAUD = UART_BAUD_M;
    U0GCR = (U0GCR & ~U0GCR_BAUD_E) | UART_BAUD_E;

    // Initialise UART protocol (start/stop bit, data bits, parity, etc.):
    // USART mode = UART (U0CSR.MODE = 1)
    U0CSR |= U0CSR_MODE;

    // Start bit level = low => Idle level = high  (U0UCR.START = 0).
    U0UCR &= ~U0UCR_START;

    // Stop bit level = high (U0UCR.STOP = 1).
    U0UCR |= U0UCR_STOP;

    // Number of stop bits = 1 (U0UCR.SPB = 0).
    U0UCR &= ~U0UCR_SPB;

    // Parity = disabled (U0UCR.PARITY = 0).
    U0UCR &= ~U0UCR_PARITY;

    // 9-bit data enable = 8 bits transfer (U0UCR.BIT9 = 0).
    U0UCR &= ~U0UCR_BIT9;

    // Level of bit 9 = 0 (U0UCR.D9 = 0), used when U0UCR.BIT9 = 1.
    // Level of bit 9 = 1 (U0UCR.D9 = 1), used when U0UCR.BIT9 = 1.
    // Parity = Even (U0UCR.D9 = 0), used when U0UCR.PARITY = 1.
    // Parity = Odd (U0UCR.D9 = 1), used when U0UCR.PARITY = 1.
    U0UCR &= ~U0UCR_D9;

    // Flow control = disabled (U0UCR.FLOW = 0).
    U0UCR &= ~U0UCR_FLOW;

    // Bit order = LSB first (U0GCR.ORDER = 0).
    U0GCR &= ~U0GCR_ORDER;

in board Config file (iocc2540.h):

// U0CSR (0x86) - USART 0 Control and Status
#define U0CSR_MODE                        0x80
#define U0CSR_RE                          0x40
#define U0CSR_SLAVE                       0x20
#define U0CSR_FE                          0x10
#define U0CSR_ERR                         0x08
#define U0CSR_RX_BYTE                     0x04
#define U0CSR_TX_BYTE                     0x02
#define U0CSR_ACTIVE                      0x01

// U0UCR (0xC4) - USART 0 UART Control
#define U0UCR_FLUSH                       0x80
#define U0UCR_FLOW                        0x40
#define U0UCR_D9                          0x20
#define U0UCR_BIT9                        0x10
#define U0UCR_PARITY                      0x08
#define U0UCR_SPB                         0x04
#define U0UCR_STOP                        0x02
#define U0UCR_START                       0x01

#define U0GCR_ORDER                       0x20
#define U0GCR_BAUD_E                      0x1F

---------------------------------------------------------------------------------

Can anyone tell me where and how I have to change for UART Communication through CC2540.

please provide hardware connection detail as well if possible.

reply as soon as possible because i am stuck in this since 1.5 months.