void CI24R1_SetTxMode(void)
{
    uint8_t value;
    value = CI24R1_ReadReg(CI24R1_CMD_R_REGISTER | CI24R1_REG_CONFIG);
    value &= 0xFE;
    CI24R1_WriteReg(CI24R1_CMD_W_REGISTER | CI24R1_REG_CONFIG, value);
}

uint8_t CI24R1_Tx(uint8_t *ucPayload, uint8_t length)
{
    uint8_t status;
#if (CI24R1_PLOAD_WIDTH == 0)
    CI24R1_WriteFromBuf(CI24R1_CMD_W_TX_PAYLOAD, ucPayload, length);
#else
    CI24R1_WriteFromBuf(CI24R1_CMD_W_TX_PAYLOAD, ucPayload, CI24R1_PLOAD_WIDTH);
#endif
    CI24R1_CE_HIGH();
    CI24R1_WriteCmd(CI24R1_CMD_SELIRQ);
    CI24R1_DATA_IN();
    while (CI24R1_DATA_READ());
    CI24R1_DATA_OUT();
    CI24R1_WriteCmd(CI24R1_CMD_SELSPI);
    status = CI24R1_ReadStatus();
    if (status & CI24R1_FLAG_MAX_RT)
    {
        CI24R1_WriteReg(CI24R1_CMD_FLUSH_TX, CI24R1_CMD_NOP);
    }
    // Clear status flags
    CI24R1_WriteReg(CI24R1_CMD_W_REGISTER | CI24R1_REG_STATUS, status);
    return status;
}

Ci24R1 接收

也沿用了厂商的例子, 切换到输入状态后, 阻塞等待接收中断. 如果测试中, SPI读写没问题, 距离也够近, 但是一直没中断, 可以检查一下
两个模块的TX地址和RX_P0地址, RF Channel是否一致, 是否开启了对应RX Pipe, 如果是固定宽度, 是否在对应的接收pipe上正确设置了.

void CI24R1_SetRxMode(void)
{
    uint8_t value;
    value = CI24R1_ReadReg(CI24R1_CMD_R_REGISTER | CI24R1_REG_CONFIG);
    value |= 0x01;
    CI24R1_WriteReg(CI24R1_CMD_W_REGISTER | CI24R1_REG_CONFIG, value);
}

uint8_t CI24R1_Rx(void)
{
    uint8_t i, status, rxplWidth;
    CI24R1_WriteReg(CI24R1_CMD_FLUSH_RX, CI24R1_CMD_NOP);
    CI24R1_WriteReg(CI24R1_CMD_SELIRQ, CI24R1_CMD_NOP);
    CI24R1_DATA_IN();
    while(CI24R1_DATA_READ());
    CI24R1_DATA_OUT();
    CI24R1_WriteReg(CI24R1_CMD_SELSPI, CI24R1_CMD_NOP);
    status = CI24R1_ReadStatus();
    UART1_TxChar('>');
    UART1_TxHex(status);
    if (status & CI24R1_FLAG_RX_READY)
    {
#if CI24R1_PLOAD_WIDTH == 0
        rxplWidth = CI24R1_ReadReg(CI24R1_CMD_R_RX_PL_WID);
#else
        rxplWidth = CI24R1_PLOAD_WIDTH;
#endif
        // Read RX to buffer
        CI24R1_ReadToBuf(CI24R1_CMD_R_RX_PAYLOAD, xbuf, rxplWidth);
        // Clear status flags
        CI24R1_WriteReg(CI24R1_CMD_W_REGISTER | CI24R1_REG_STATUS, status);
        UART1_TxChar('>');
        for (i = 0; i < rxplWidth; i++)
        {
            UART1_TxHex(*(xbuf_data + i));
        }
    }
    return status;
}

结束

测试中Ci24R1的通信还是比较稳定的, 因为IO转换加上模拟SPI, 通信的速率和4线SPI的nRF24L01和Si24R1比肯定会有差距, 好处是省了一个IO.

这种芯片市场指向非常明显, 就是面向成本和尺寸敏感的市场, 仅需要GPIO就能使用, 几乎所有的MCU都能兼容. 廉价的玩具和家用电器的遥控, 这些产品大量使用8pin的8位MCU, 这种MCU总共只有6个可用IO, 省一个IO就能增加不少可能性. 市场上还有同类型集成了MCU的型号, 例如XL2401, XL2402, SOP16封装连无线带MCU不到1.4CNY, 可以将成本控制到非常低, 集成后也利于生产和品控.