在CH32V307上移植SD_SPI驱动

将SD SPI驱动添加到工程目录中

MounRiver Studio会自动添加文件路径到工程内

sdspi_port.c文件是移植的接口文件，里面需要根据实际使用情况实现接口函数，包含SPI初始化、SPI时钟速率变更及SPI数据收发函数

我这里使用的是SPI1

相关接口函数如下：

/*
 * Copyright 2022 MindMotion Microelectronics Co., Ltd.
 * All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
#include <stdio.h>
#include <stdint.h>
#include "sdspi.h"
#include "ch32v30x.h"

/* pins:
 * tx : PA7/SPI_MOSI
 * rx : PA6/SPI0_MISO
 * clk: PA5/SPI1_SCK
 * cs : PA4/SPI0_PCS0
 */

#define BOARD_SDSPI_TX_GPIO_PORT  GPIOA
#define BOARD_SDSPI_TX_GPIO_PIN   GPIO_Pin_7

#define BOARD_SDSPI_RX_GPIO_PORT  GPIOA
#define BOARD_SDSPI_RX_GPIO_PIN   GPIO_Pin_6

#define BOARD_SDSPI_CLK_GPIO_PORT GPIOA
#define BOARD_SDSPI_CLK_GPIO_PIN  GPIO_Pin_5

#define BOARD_SDSPI_CS_GPIO_PORT  GPIOA
#define BOARD_SDSPI_CS_GPIO_PIN   GPIO_Pin_4

SDSPI_ApiRetStatus_Type sdspi_spi_init(void);
SDSPI_ApiRetStatus_Type sdspi_spi_freq(uint32_t hz);
SDSPI_ApiRetStatus_Type sdspi_spi_xfer(uint8_t *in, uint8_t *out, uint32_t len);

const SDSPI_Interface_Type board_sdspi_if =
{
    .baudrate = 1000000u, /* 1mhz. */
    .spi_init = sdspi_spi_init,
    .spi_freq = sdspi_spi_freq,
    .spi_xfer = sdspi_spi_xfer
};

uint32_t board_sdspi_delay_count;

static void board_sdspi_delay(uint32_t count)
{
    for (uint32_t i = count; i > 0u; i--)
    {
        __NOP();
    }
}

SDSPI_ApiRetStatus_Type sdspi_spi_init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    SPI_InitTypeDef  SPI_InitStructure = {0};

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);

    GPIO_SetBits(BOARD_SDSPI_CS_GPIO_PORT, BOARD_SDSPI_CS_GPIO_PIN);

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

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
    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_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

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

    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);

    return SDSPI_ApiRetStatus_Success;
}

SDSPI_ApiRetStatus_Type sdspi_spi_freq(uint32_t hz)
{
    SPI_InitTypeDef  SPI_InitStructure = {0};

    GPIO_SetBits(BOARD_SDSPI_CS_GPIO_PORT, BOARD_SDSPI_CS_GPIO_PIN);

    SPI_Enable(SPI1, DISABLE);
	
	/*!< SPI configuration */
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
//    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
		
    switch (hz)
    {
    case SDMMC_CLOCK_400KHZ:
        SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
        break;
    default:
        SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
        break;
    }
		
    SPI_Init(SPI1, &SPI_InitStructure);
	/*!< Enable the sFLASH_SPI  */
	SPI_Cmd(SPI1, ENABLE);
		
    return SDSPI_ApiRetStatus_Success;
}

/* SPI tx. */
void app_spi_putbyte(uint8_t tx_dat)
{
    u8 i = 0;

    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
    {
        i++;
        if(i > 200)
            return ;
    }

    SPI_I2S_SendData(SPI1, tx_dat);
}

/* SPI rx. */
uint8_t app_spi_getbyte(void)
{
    u8 i = 0;
    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET)
    {
        i++;
        if(i > 200)
            return 0;
    }

    return SPI_I2S_ReceiveData(SPI1);
}

uint8_t spi_xfer(uint8_t tx_dat)
{	
    u8 i = 0;

    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
    {
        i++;
        if(i > 200)
            return 0;
    }

    SPI_I2S_SendData(SPI1, tx_dat);
    i = 0;

    while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET)
    {
        i++;
        if(i > 200)
            return 0;
    }

    return SPI_I2S_ReceiveData(SPI1);
}

SDSPI_ApiRetStatus_Type sdspi_spi_xfer(uint8_t *in, uint8_t *out, uint32_t len)
{
    uint8_t inbuf, outbuf;

		GPIO_ResetBits(BOARD_SDSPI_CS_GPIO_PORT, BOARD_SDSPI_CS_GPIO_PIN);

    for (uint32_t i = 0u; i < len; i++)
    {
        inbuf = (in == NULL) ? SDSPI_DUMMY_DATA: *in++;
        outbuf = spi_xfer(inbuf);
        if (out)
        {
            *out = outbuf;
            out++;
        }
    }

		GPIO_SetBits(BOARD_SDSPI_CS_GPIO_PORT, BOARD_SDSPI_CS_GPIO_PIN);

    return SDSPI_ApiRetStatus_Success;
}

/* EOF. */

移植完这些，SD-SPI驱动就移植完了，为后续工作准好的驱动工作。
驱动文件：*附件：sdspi.zip