帮我基于LPC5516 的 spi_dma_b2b 例程 写一个 8 路 SPI 同时通过 DMA0 传输数据的 C语言程序

好的，我知道了。关于你的第一个问题，以下是基于LPC5516的spi_dma_b2b例程修改后的8路SPI同时通过DMA0传输数据的C语言程序：

#include "board.h"
#include "periph_spi_dma.h"

#define BUFFER_SIZE  32

/* SPI master select, to select slave to communicate */
#define LPC_SLAVE_A_SPI_PORT      0
#define LPC_SLAVE_A_SPI_PIN       15

#define LPC_SLAVE_B_SPI_PORT      0
#define LPC_SLAVE_B_SPI_PIN       16

#define LPC_SLAVE_C_SPI_PORT      0
#define LPC_SLAVE_C_SPI_PIN       17

#define LPC_SLAVE_D_SPI_PORT      0
#define LPC_SLAVE_D_SPI_PIN       18

#define LPC_SLAVE_E_SPI_PORT      0
#define LPC_SLAVE_E_SPI_PIN       19

#define LPC_SLAVE_F_SPI_PORT      0
#define LPC_SLAVE_F_SPI_PIN       20

#define LPC_SLAVE_G_SPI_PORT      0
#define LPC_SLAVE_G_SPI_PIN       21

#define LPC_SLAVE_H_SPI_PORT      0
#define LPC_SLAVE_H_SPI_PIN       22

/* SPI master and slave configuration */
static SPI_CONFIG_T mstCfg0 = {
    SPI_MODE_MASTER,        /* Transfer mode */
    0,                      /* Bus configuration: ignored in master mode */
    SPI_CLOCK_CPHA0_CPOL0,  /* Clock mode */
    SPI_DATA_MSB_FIRST,     /* Data order: MSB first */
    SPI_SSEL_ACTIVE_LO,     /* Slave select is active low */
    8                       /* SPI clock divider - not used in master mode */
};

static SPI_DMA_CONFIG_T dmaCfg = {
    SPI_DMA_CHAN_TX_RX,     /* DMA configuration */
    SPI_DMA_INT_EN,         /* DMA interrupt enable */
    SPI_DMA_INTSTAT_TXERR,  /* DMA interrupt status */
    BUFFER_SIZE             /* DMA transfer size */
};

static SPI_DMA_HANDLE_T spiHandle;

/* Sample data buffer */
static uint32_t txBuf[ BUFFER_SIZE ];
static uint32_t rxBuf[ BUFFER_SIZE ];
static uint32_t rxSlaveABuf[ BUFFER_SIZE ];
static uint32_t rxSlaveBBuf[ BUFFER_SIZE ];
static uint32_t rxSlaveCBuf[ BUFFER_SIZE ];
static uint32_t rxSlaveDBuf[ BUFFER_SIZE ];
static uint32_t rxSlaveEBuf[ BUFFER_SIZE ];
static uint32_t rxSlaveFBuf[ BUFFER_SIZE ];
static uint32_t rxSlaveGBuf[ BUFFER_SIZE ];
static uint32_t rxSlaveHBuf[ BUFFER_SIZE ];

/* Function prototypes */
static void initSpiMaster( void );
static void initSpiSlave( uint8_t port, uint8_t pin );

int main(void)
{
    /* Initialize board */
    Board_Init();
    
    /* Initialize master and slaves */
    initSpiMaster();
    initSpiSlave( LPC_SLAVE_A_SPI_PORT, LPC_SLAVE_A_SPI_PIN );
    initSpiSlave( LPC_SLAVE_B_SPI_PORT, LPC_SLAVE_B_SPI_PIN );
    initSpiSlave( LPC_SLAVE_C_SPI_PORT, LPC_SLAVE_C_SPI_PIN );
    initSpiSlave( LPC_SLAVE_D_SPI_PORT, LPC_SLAVE_D_SPI_PIN );
    initSpiSlave( LPC_SLAVE_E_SPI_PORT, LPC_SLAVE_E_SPI_PIN );
    initSpiSlave( LPC_SLAVE_F_SPI_PORT, LPC_SLAVE_F_SPI_PIN );
    initSpiSlave( LPC_SLAVE_G_SPI_PORT, LPC_SLAVE_G_SPI_PIN );
    initSpiSlave( LPC_SLAVE_H_SPI_PORT, LPC_SLAVE_H_SPI_PIN );
    
    /* Start SPI transfers */
    SPI_DMA_TRANSFER_T transfer;
    transfer.pTxData = txBuf;
    transfer.pRxData[0] = rxBuf;
    transfer.pRxData[1] = rxSlaveABuf;
    transfer.pRxData[2] = rxSlaveBBuf;
    transfer.pRxData[3] = rxSlaveCBuf;
    transfer.pRxData[4] = rxSlaveDBuf;
    transfer.pRxData[5] = rxSlaveEBuf;
    transfer.pRxData[6] = rxSlaveFBuf;
    transfer.pRxData[7] = rxSlaveGBuf;
    transfer.pRxData[8] = rxSlaveHBuf;
    transfer.dataLength = BUFFER_SIZE;
    SPI_DmaTransfer( &spiHandle, &dmaCfg, &transfer );

    while (1) {}
}

static void initSpiMaster( void )
{
    /* Initialize SPI0 as master with SSEL0 */
    Chip_SPI_Init( LPC_SPI0 );
    Chip_SPI_ConfigureSPI( LPC_SPI0, &mstCfg0 );
    Chip_Clock_EnablePeriphClock( SYSCTL_CLOCK_SPI0 );
    Chip_SPI_Enable( LPC_SPI0 );
    
    /* Set SPI 0.15 as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, LPC_SLAVE_A_SPI_PORT, LPC_SLAVE_A_SPI_PIN);
    /* Set SPI 0.16 as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, LPC_SLAVE_B_SPI_PORT, LPC_SLAVE_B_SPI_PIN);
    /* Set SPI 0.17 as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, LPC_SLAVE_C_SPI_PORT, LPC_SLAVE_C_SPI_PIN);
    /* Set SPI 0.18 as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, LPC_SLAVE_D_SPI_PORT, LPC_SLAVE_D_SPI_PIN);
    /* Set SPI 0.19 as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, LPC_SLAVE_E_SPI_PORT, LPC_SLAVE_E_SPI_PIN);
    /* Set SPI 0.20 as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, LPC_SLAVE_F_SPI_PORT, LPC_SLAVE_F_SPI_PIN);
    /* Set SPI 0.21 as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, LPC_SLAVE_G_SPI_PORT, LPC_SLAVE_G_SPI_PIN);
    /* Set SPI 0.22 as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, LPC_SLAVE_H_SPI_PORT, LPC_SLAVE_H_SPI_PIN);
}

static void initSpiSlave( uint8_t port, uint8_t pin )
{
    /* Set SPI slave select as GPIO output */
    Chip_GPIO_SetPinDIROutput(LPC_GPIO, port, pin);
    /* Set SPI slave select high to de-select slave */
    Chip_GPIO_SetPinState(LPC_GPIO, port, pin, true); 
}

请注意，以上程序仅供参考，请根据实际要求进行修改和调试。