radio - Texas Instruments CC2541 - 如何在专有射频模式下接收数据？

Question

谁能分享一个完整的项目示例，如何在专有 RF 模式下设置寄存器和接收数据？Texas Instruments 仅发布了一个示例 - PER Test，该示例非常难以理解和修改。理想情况下，我想禁用尽可能多的东西并收听来自解调器的原始数据。

到目前为止，这是我想出的：

#include "prop_regs.h"
#include "hal_board.h"

void halRfSetFreq(uint16 frequency);
void rxSetRegisterSettings(void);


void halRfSetFreq(uint16 frequency) {
    MDMTEST1 = 0x05; // 0 MHz IF
    FREQCTRL = frequency - 2379;
    return;
}

void rxSetRegisterSettings(void) {
        /***********************************************************************
        * CC2541 RX REGISTER SETTINGS
        */
        FRMCTRL0           = 0x40; //
        MDMCTRL0           = 0x06; // modem configuration
        MDMCTRL1           = 0x48; // modem configuration
        MDMCTRL2           = 0x7C; // modem configuration
        MDMCTRL3           = 0x23; // modem configuration
        SW0                = 0x34; // primary sync word byte 0
        SW1                = 0x12; // primary sync word byte 1
        SW2                = 0x00; // primary sync word byte 2
        SW3                = 0x00; // primary sync word byte 3
        RXCTRL             = 0x29; // receive section tuning
        FSCTRL             = 0x5A; // frequency synthesizer tuning
        LNAGAIN            = 0x00; // lna gain setting
        ADCTEST0           = 0x66; //
        MDMTEST1           = 0x25; // modem configuration
        LLECTRL            = 0x01; // lle control
        BSP_MODE           = 0x00; // bit stream processor configuration
        IVCTRL             = 0x1B; // analog control register
        RFC_OBS_CTRL0      = 0x08;
        RFC_OBS_CTRL1      = 0x09;
        OBSSEL0            = 0xFB;
        OBSSEL1            = 0xFC;
}




/***********************************************************************************
* @fn          main
*
* @brief       Main program
*
* @param       void
*
* @return      int (does not return)
*/
int main(void) {
    unsigned volatile char *p = 0;
    unsigned char i = 0;

    // Initialize Clock Source (32 Mhz Xtal), global interrupt (EA=1),  I/O ports and pheripherals(LCD).
    halBoardInit();

    // Clear radio data RAM (page 0)
    p = RFCORE_RAM_PAGE;
    for (i = 0; i < RFCORE_RAM_PAGE_SZ; i++) {
      *p++ = 0;
    }

    // Program sync word length to 32 bit and configure single sync word
    SW_CONF = 0;

    // Disable timer 2 events to LLE
    T2EVTCFG = 0x77;
    //Enable link layer engine prop mode
    LLECTRL = 0x01;
    RFST = 0x01; // CMD_Shutdown

    halRfInit();

    // Set correct register settings for continous rx.
    // Most settings copied from SmartRFStudio.
    rxSetRegisterSettings();

    // Set frequency.
    halRfSetFreq(2424); // 2440 MHz

    // Clear TASKDONE interrupt
    RFIRQF1 = ~0x40;
    //Send CMD_Rx_TEST to LLE.
    while (RFST != 0);
    RFST = CMD_DEMOD_TEST;
    while(1);
}

我在 P1_0 和 P1_1 上连接了我的逻辑分析仪，但它没有声音。

标签： radiotexas-instruments