请问ADS12935导联时WCT需要连接到什么？

ADS12935是一款24位模数转换器（ADC），用于测量生物电信号。在导联时，WCT（Working Channel Terminal）需要连接到生物电信号的输入端。具体连接方式如下：

1. 将WCT连接到生物电信号的输入端，例如心电图（ECG）或脑电图（EEG）信号。
2. 将REFD和REFS引脚连接到地（GND）。
3. 将BP和BN引脚连接到生物电信号的参考电极。

关于TI（德州仪器）的ADS1293和ARM的SPI连接程序代码，您可以参考以下示例代码。这个示例代码展示了如何使用ARM Cortex-M3微控制器通过SPI接口与ADS1293进行通信。请注意，您可能需要根据您的具体硬件和软件环境进行适当的修改。

```c
#include "stm32f4xx.h"

#define ADS1293_CS_PIN    GPIO_Pin_6
#define ADS1293_CS_PORT   GPIOB
#define ADS1293_SPI       SPI2
#define ADS1293_SPI_CLK   RCC_APB1Periph_SPI2

void ADS1293_Init(void) {
    GPIO_InitTypeDef GPIO_InitStruct;
    SPI_InitTypeDef SPI_InitStruct;

    // Enable GPIO and SPI clocks
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
    RCC_APB1PeriphClockCmd(ADS1293_SPI_CLK, ENABLE);

    // Configure CS pin as output
    GPIO_InitStruct.GPIO_Pin = ADS1293_CS_PIN;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(ADS1293_CS_PORT, &GPIO_InitStruct);

    // Configure SPI interface
    SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
    SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStruct.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
    SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStruct.SPI_CRCPolynomial = 7;
    SPI_Init(ADS1293_SPI, &SPI_InitStruct);

    // Enable SPI
    SPI_Cmd(ADS1293_SPI, ENABLE);
}

void ADS1293_Select(void) {
    GPIO_ResetBits(ADS1293_CS_PORT, ADS1293_CS_PIN);
}

void ADS1293_Deselect(void) {
    GPIO_SetBits(ADS1293_CS_PORT, ADS1293_CS_PIN);
}

uint8_t ADS1293_ReadByte(void) {
    uint8_t data;

    while (SPI_I2S_GetFlagStatus(ADS1293_SPI, SPI_I2S_FLAG_RXNE) == RESET);

    data = SPI_I2S_ReceiveData(ADS1293_SPI);

    return data;
}

void ADS1293_WriteByte(uint8_t data) {
    while (SPI_I2S_GetFlagStatus(ADS1293_SPI, SPI_I2S_FLAG_TXE) == RESET);

    SPI_I2S_SendData(ADS1293_SPI, data);
}

int main(void) {
    ADS1293_Init();

    while (1) {
        ADS1293_Select();
        ADS1293_WriteByte(0x00); // Write command to read data
        uint8_t data = ADS1293_ReadByte();
        ADS1293_Deselect();

        // Process the received data
    }
}
```

这个示例代码仅用于演示如何通过SPI接口与ADS1293进行通信。您需要根据您的具体应用场景和硬件环境进行适当的修改。希望这对您有所帮助！