如何在keil中实现用STM32F103VET6与30个外部ADC通讯，将控制CS的30个IO口定义成一个数组指针，通讯成功点亮一个led灯

首先，需要在Keil中配置好STM32F103VET6的开发环境，包括编译器、调试器、编译选项等。然后，需要编写代码实现与30个外部ADC通讯。

1. 定义一个数组指针，用于控制CS的30个IO口：

GPIO_TypeDef* CS_GPIO[30] = {GPIOA, GPIOB, GPIOC, ...};
uint16_t CS_PIN[30] = {GPIO_Pin_0, GPIO_Pin_1, GPIO_Pin_2, ...};

2. 初始化GPIO口和SPI接口：

GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_SPI1, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);

SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_Init(SPI1, &SPI_InitStructure);

SPI_Cmd(SPI1, ENABLE);

3. 实现与外部ADC通讯的函数：

void read_adc(uint8_t channel, uint16_t* data)
{
    uint8_t i;
    for (i = 0; i < 30; i++) {
        GPIO_ResetBits(CS_GPIO[i], CS_PIN[i]); // 先将所有CS口拉低
    }
    GPIO_SetBits(CS_GPIO[channel], CS_PIN[channel]); // 选中指定的CS口
    // 发送读取指令
    SPI_I2S_SendData(SPI1, 0x6A80 | (channel << 7));
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
    SPI_I2S_ReceiveData(SPI1);
    // 读取数据
    SPI_I2S_SendData(SPI1, 0x0000);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
    *data = SPI_I2S_ReceiveData(SPI1);
    GPIO_SetBits(CS_GPIO[channel], CS_PIN[channel]); // 取消选中CS口
}

4. 在主函数中读取30个ADC的数据并控制LED灯：

int main(void)
{
    uint16_t data[30];
    int i;
    while (1) {
        for (i = 0; i < 30; i++) {
            read_adc(i, &data[i]);
            if (data[i] > 0x7FFF) {
                GPIO_SetBits(GPIOC, GPIO_Pin_13); // 点亮LED灯
            } else {
                GPIO_ResetBits(GPIOC, GPIO_Pin_13); // 熄灭LED灯
            }
        }
    }
}

以上是一个简单的示例代码，实际应用中需要根据具体情况进行修改和优化。