GD32F303驱动LLCC68的代码

以下是使用 GD32F303 板载的 SPI 接口驱动 LLCC68 模块的代码示例：

#include "gd32f30x.h"
#include "systick.h"
#include "spi.h"

#define LLCC68_SPI                           SPI0
#define LLCC68_SPI_CLK                       RCU_SPI0
#define LLCC68_SPI_CS_PIN                    GPIO_PIN_5
#define LLCC68_SPI_CS_GPIO_PORT              GPIOA
#define LLCC68_SPI_CS_GPIO_CLK               RCU_GPIOA

#define LLCC68_RESET_PIN                     GPIO_PIN_6
#define LLCC68_RESET_GPIO_PORT               GPIOA
#define LLCC68_RESET_GPIO_CLK                RCU_GPIOA

#define LLCC68_SPI_CS_LOW()                  gpio_bit_reset(LLCC68_SPI_CS_GPIO_PORT, LLCC68_SPI_CS_PIN)
#define LLCC68_SPI_CS_HIGH()                 gpio_bit_set(LLCC68_SPI_CS_GPIO_PORT, LLCC68_SPI_CS_PIN)

void llcc68_hw_init(void)
{
    /* Enable LLCC68 reset GPIO clock */
    rcu_periph_clock_enable(LLCC68_RESET_GPIO_CLK);

    /* Configure LLCC68 reset pin */
    gpio_init(LLCC68_RESET_GPIO_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, LLCC68_RESET_PIN);
    gpio_bit_reset(LLCC68_RESET_GPIO_PORT, LLCC68_RESET_PIN);

    /* Enable LLCC68 SPI GPIO and SPI clock */
    rcu_periph_clock_enable(LLCC68_SPI_CS_GPIO_CLK);
    rcu_periph_clock_enable(LLCC68_SPI_CLK);

    /* Configure LLCC68 SPI CS pin */
    gpio_init(LLCC68_SPI_CS_GPIO_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, LLCC68_SPI_CS_PIN);
    gpio_bit_set(LLCC68_SPI_CS_GPIO_PORT, LLCC68_SPI_CS_PIN);

    /* Configure SPI parameters */
    spi_parameter_struct spi_init_struct;
    spi_struct_para_init(&spi_init_struct);
    spi_init_struct.trans_mode           = SPI_TRANSMODE_FULLDUPLEX;
    spi_init_struct.device_mode          = SPI_MASTER;
    spi_init_struct.frame_size           = SPI_FRAMESIZE_8BIT;
    spi_init_struct.clock_polarity_phase = SPI_CK_PL_HIGH_PH_2EDGE;
    spi_init_struct.nss                  = SPI_NSS_SOFT;
    spi_init_struct.prescale             = SPI_PSC_2;
    spi_init(LLCC68_SPI, &spi_init_struct);

    /* Enable SPI */
    spi_enable(LLCC68_SPI);
}

void llcc68_hw_reset(void)
{
    gpio_bit_set(LLCC68_RESET_GPIO_PORT, LLCC68_RESET_PIN);
    delay_1ms(10);
    gpio_bit_reset(LLCC68_RESET_GPIO_PORT, LLCC68_RESET_PIN);
    delay_1ms(10);
    gpio_bit_set(LLCC68_RESET_GPIO_PORT, LLCC68_RESET_PIN);
    delay_1ms(10);
}

void llcc68_hw_spi_write(uint8_t *buffer, uint16_t size)
{
    LLCC68_SPI_CS_LOW();
    for (uint16_t i = 0; i < size; i++) {
        spi_i2s_data_transmit(LLCC68_SPI, buffer[i]);
        while (RESET == spi_i2s_flag_get(LLCC68_SPI, SPI_FLAG_TBE));
        while (RESET == spi_i2s_flag_get(LLCC68_SPI, SPI_FLAG_RBNE));
        spi_i2s_data_receive(LLCC68_SPI);
    }
    LLCC68_SPI_CS_HIGH();
}

void llcc68_hw_spi_read(uint8_t *buffer, uint16_t size)
{
    LLCC68_SPI_CS_LOW();
    for (uint16_t i = 0; i < size; i++) {
        spi_i2s_data_transmit(LLCC68_SPI, 0x00);
        while (RESET == spi_i2s_flag_get(LLCC68_SPI, SPI_FLAG_TBE));
        while (RESET == spi_i2s_flag_get(LLCC68_SPI, SPI_FLAG_RBNE));
        buffer[i] = spi_i2s_data_receive(LLCC68_SPI);
    }
    LLCC68_SPI_CS_HIGH();
}

这里使用了 GD32F303 板载的 SPI 接口来驱动 LLCC68 模块，同时也提供了 LLCC68 的复位功能。在 `llcc68_hw_init()` 中，我们对 SPI 接口进行了初始化，并且对 GPIO 进行了配置。`llcc68_hw_reset()` 用于执行 LLCC68 模块的复位操作。最后，`llcc68_hw_spi_write()` 和 `llcc68_hw_spi_read()` 分别用于向 LLCC68 模块写入数据和读取数据。注意，在这个示例中，SPI 接口与 LLCC68 模块之间使用了软件 NSS 信号。如果你的模块需要使用硬件 NSS 信号，请根据需要进行修改。