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【程序】Marvell 88W8686 WiFi模块的固件下载代码

巨大八爪鱼

一派护法十九级

1楼发表于：2017-7-6 22:27

【main.c】
#include <stdio.h>
#include <stm32f10x.h>
#include <string.h>
#include "WiFi.h"

// 延时n毫秒
void delay(uint16_t n)
{
    TIM6->ARR = 10 * n - 1; // nms
    TIM6->PSC = 7199; // 72MHz/7200=10kHz
    TIM6->CR1 = TIM_CR1_URS | TIM_CR1_OPM; // UG不置位UIF, 非循环模式
    TIM6->EGR = TIM_EGR_UG; // 保存设置
    TIM6->CR1 |= TIM_CR1_CEN; // 开始计时
    while ((TIM6->SR & TIM_SR_UIF) == 0); // 等待计时完毕
    TIM6->SR &= ~TIM_SR_UIF; // 清除溢出标志
}

int fputc(int ch, FILE *fp)
{
    if (fp == stdout)
    {
        if (ch == '\n')
        {
            while ((USART1->SR & USART_SR_TXE) == 0);
            USART1->DR = '\r';
        }
        while ((USART1->SR & USART_SR_TXE) == 0);
        USART1->DR = ch;
    }
    return ch;
}

void dump_data(uint8_t *data, uint16_t len)
{
    uint32_t crc;
    CRC->CR = CRC_CR_RESET;
    while (len--)
    {
        CRC->DR = *data;
        printf("%02X", *data++);
    }
    crc = CRC->DR;

    for (len = 0; len < 4; len++)
    {
        printf("%02X", crc & 0xff);
        crc >>= 8;
    }
    printf("\n");
}

int main(void)
{
    volatile uint32_t sta;

    RCC->AHBENR = RCC_AHBENR_CRCEN | RCC_AHBENR_SDIOEN;
    RCC->APB1ENR = RCC_APB1ENR_TIM6EN;
    RCC->APB2ENR = RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_IOPDEN | RCC_APB2ENR_USART1EN;

    GPIOA->CRH = 0x000004b0;
    GPIOB->CRH = 0x00030000; // PB12为外接的WiFi模块电源开关, PB12=0时打开WiFi模块
    GPIOC->CRH = 0x000bbbbb;
    GPIOD->CRL = 0x00000b00;

    USART1->BRR = 0x271; // 波特率: 115200
    USART1->CR1 = USART_CR1_UE | USART_CR1_TE;

    WiFi_Init();
    WiFi_DownloadFirmware();

    while (1)
    {
        sta = SDIO->STA;
        printf("SDIO->STA=0x%08x\n", sta);
        while (sta == SDIO->STA);
    }
}

巨大八爪鱼

一派护法十九级

2楼发表于：2017-7-6 22:28

【WiFi.h】
#define _BV(n) (1u << (n))

#define CMD52_WRITE _BV(31)
#define CMD52_READAFTERWRITE _BV(27)

#define CMD53_WRITE _BV(31)
#define CMD53_BLOCKMODE _BV(27)
#define CMD53_INCREMENTING _BV(26)

// 16.5 SDIO Card Metaformat
#define CISTPL_NULL 0x00 // Null tuple
#define CISTPL_VERS_1 0x15 // Level 1 version/product-information
#define CISTPL_MANFID 0x20 // Manufacturer Identification String Tuple
#define CISTPL_FUNCID 0x21 // Function Identification Tuple
#define CISTPL_FUNCE 0x22 // Function Extensions
#define CISTPL_END 0xff // The End-of-chain Tuple

#define WIFI_SQREADBASEADDR0 0x10
#define WIFI_SQREADBASEADDR1 0x11
#define WIFI_SQREADBASEADDR2 0x12
#define WIFI_SQREADBASEADDR3 0x13

#define WIFI_CARDSTATUS 0x20 // Card Status
#define WIFI_CARDSTATUS_IOREADY _BV(3) // I/O Ready Indicator
#define WIFI_CARDSTATUS_CISCARDRDY _BV(2) // Card Information Structure Card Ready
#define WIFI_CARDSTATUS_UPLDCARDRDY _BV(1) // Upload Card Ready
#define WIFI_CARDSTATUS_DNLDCARDRDY _BV(0) // Download Card Ready

#define WiFi_GetBlockSize() _BV((SDIO->DCTRL & SDIO_DCTRL_DBLOCKSIZE) >> 4)

void WiFi_CheckCmdTimeout(void);
void WiFi_DownloadFirmware(void);
void WiFi_Init(void);
uint8_t WiFi_Read(uint8_t func, uint32_t addr);
void WiFi_ReadData(uint8_t func, uint32_t addr, uint8_t *data, uint16_t count, uint32_t flags);
void WiFi_SendCMD52(uint8_t func, uint32_t addr, uint8_t data, uint32_t flags);
void WiFi_SendCMD53(uint8_t func, uint32_t addr, uint16_t count, uint32_t flags);
void WiFi_SetBlockSize(uint8_t func);
void WiFi_ShowCIS(uint8_t func);
void WiFi_ShowShortResponse(void);
void WiFi_Wait(void);
uint8_t WiFi_Write(uint8_t func, uint32_t addr, uint8_t value);
void WiFi_WriteData(uint8_t func, uint32_t addr, const uint8_t *data, uint16_t count, uint32_t flags);

巨大八爪鱼

一派护法十九级

4楼发表于：2017-7-6 22:29

【程序运行结果】
Initialization begins...
Command response received: CMD63, RESP_90ff8000
Command response received: CMD63, RESP_90300000
Number of I/O Functions: 1
Memory Present: 0
Relative card address: 0x0001
Card selected! status=0x00001e00
Pointer to Function 0 Card Information Structure (CIS): 0x00008000
[CIS Tuple 0x15] addr=0x00008000 size=31
01004D617276656C6C003830322E3131205344494F2049443A2030420000FFECE43609
Marvell
802.11 SDIO ID: 0B
[CIS Tuple 0x20] addr=0x00008021 size=4
DF020391B20F4143
SDIO Card manufacturer code: 0x02df
manufacturer information (Part Number and/or Revision): 0x9103
[CIS Tuple 0x21] addr=0x00008027 size=2
0C00DC3F1908
Card function code: 0x0c
System initialization bit mask: 0x00
[CIS Tuple 0x22] addr=0x0000802b size=4
00000132BB1390C1
maximum block size: 256
maximum transfer rate code: 0x32
Pointer to Function 1 Card Information Structure (CIS): 0x00008080
[CIS Tuple 0x21] addr=0x00008080 size=2
0C00DC3F1908
Card function code: 0x0c
System initialization bit mask: 0x00
[CIS Tuple 0x22] addr=0x00008084 size=28
010110000000000000000000000100000000000000000000000000004431F2BF
maximum block size: 256
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Firmware is successfully downloaded!
SDIO->STA=0x00000000

巨大八爪鱼

一派护法十九级

5楼发表于：2017-7-6 22:31

两个固件文件（*.bin）可在marvell的官方网站上下载到。
【获取固件数组的PC端程序】
#include <stdio.h>
#include <Windows.h>

#define FOLDER "E:\\Users\\Octopus\\Downloads\\SD-8686-LINUX26-SYSKT-9.70.3.p24-26409.P45-GPL\\SD-8686-FEDORA26FC6-SYSKT-GPL-9.70.3.p24-26409.P45\\FwImage"
#define LINELEN 24

void create(char *binfile, char *cfile, char *varname)
{
    char str[100];
    DWORD size = 0;
    FILE *fp, *fp2;
    FILETIME last_write_time;
    HANDLE hFile;
    int linecnt = 0;
    SYSTEMTIME st_local, st_utc;
    unsigned char data;

    hFile = CreateFileA(binfile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, (DWORD)NULL, NULL);
    if (hFile != INVALID_HANDLE_VALUE)
    {
        size = GetFileSize(hFile, NULL);
        GetFileTime(hFile, NULL, NULL, &last_write_time);
        FileTimeToSystemTime(&last_write_time, &st_utc);
        SystemTimeToTzSpecificLocalTime(NULL, &st_utc, &st_local);
        CloseHandle(hFile);
    }

    fopen_s(&fp, binfile, "rb");
    if (fp == NULL)
    {
        printf("Cannot open %s!\n", binfile);
        return;
    }
    fopen_s(&fp2, cfile, "w");
    if (fp2 == NULL)
    {
        fclose(fp);
        printf("Cannot open %s!\n", cfile);
        return;
    }

    GetDateFormatA(LOCALE_USER_DEFAULT, (DWORD)NULL, &st_local, NULL, str, sizeof(str));
    fprintf(fp2, "// From: %s\n// Last Modified: %s ", binfile, str);
    GetTimeFormatA(LOCALE_USER_DEFAULT, (DWORD)NULL, &st_local, NULL, str, sizeof(str));
    fprintf(fp2, "%s\n", str);

    fprintf(fp2, "const unsigned char %s[%d] = {", varname, size);
    while (data = fgetc(fp), !feof(fp))
    {
        if (linecnt == 0)
            fputs("\n\t", fp2);
        fprintf(fp2, "0x%02x, ", data);
        linecnt = (linecnt + 1) % LINELEN;
    }

    fseek(fp2, -2, SEEK_CUR);
    fputs("\n};\n", fp2);

    fclose(fp);
    fclose(fp2);
}

int main(void)
{
    SetCurrentDirectoryA(FOLDER); // 设置当前目录
    create("helper_sd.bin", "helper_sd.c", "firmware_helper_sd");
    create("sd8686.bin", "sd8686.c", "firmware_sd8686");
    return 0;
}

巨大八爪鱼

一派护法十九级

6楼发表于：2017-7-7 18:25

代码更新
【WiFi.c】
#include <stdio.h>
#include <stm32f10x.h>
#include <string.h>
#include "WiFi.h"

extern const unsigned char firmware_helper_sd[2516];
extern const unsigned char firmware_sd8686[122916];

uint16_t rca;

void delay(uint16_t n);
void dump_data(uint8_t *data, uint16_t len);

// 检查命令是否收到了回应, 若没收到则重发命令
void WiFi_CheckCmdTimeout(void)
{
    while (SDIO->STA & SDIO_STA_CTIMEOUT)
    {
        SDIO->ICR = SDIO_ICR_CTIMEOUTC; // 清除标志
        SDIO->CMD = SDIO->CMD; // 重发
        printf("Timeout! Resend CMD%d\n", SDIO->CMD & SDIO_CMD_CMDINDEX);
        while (SDIO->STA & SDIO_STA_CMDACT);
    }
}

// marvell-88w8686-固件下载程序说明.doc
void WiFi_DownloadFirmware(void)
{
    uint8_t helper_buf[64];
    const uint8_t *data;
    uint16_t size;
    uint32_t addr, len;

    // 块大小设为32
    SDIO->DCTRL &= ~SDIO_DCTRL_DTEN;
    SDIO->DCTRL = (SDIO->DCTRL & ~SDIO_DCTRL_DBLOCKSIZE) | SDIO_DCTRL_DBLOCKSIZE_2 | SDIO_DCTRL_DBLOCKSIZE_0;
    WiFi_SetBlockSize(1); // 应用到Function 1

    // 下载helper
    addr = WiFi_Read(1, 0x00) | (WiFi_Read(1, 0x01) << 8) | (WiFi_Read(1, 0x02) << 16);
    data = firmware_helper_sd;
    len = sizeof(firmware_helper_sd);
    while (len)
    {
        // 每次下载64字节, 其中前4字节为本次下载的数据量
        size = (len > 60) ? 60 : len;
        *(uint32_t *)helper_buf = size;
        memcpy(helper_buf + 4, data, size);

        WiFi_Wait();
        WiFi_WriteData(1, addr, helper_buf, 2, CMD53_BLOCKMODE);
        len -= size;
        data += size;
    }
    *(uint32_t *)helper_buf = 0;
    WiFi_WriteData(1, addr, helper_buf, 2, CMD53_BLOCKMODE); // 以空数据包结束

    // 下载固件
    data = firmware_sd8686;
    len = sizeof(firmware_sd8686);
    while (len)
    {
        WiFi_Wait();
        while ((size = WiFi_Read(1, WIFI_SQREADBASEADDR0) | (WiFi_Read(1, WIFI_SQREADBASEADDR1) << 8)) == 0); // 获取本次下载的字节数
        printf("Required: %d bytes, Remaining: %d bytes\n", size, len);
        if (size & 1)
        {
            printf("Error: an odd size is invalid!\n"); // 若size为奇数(如17)则认为出错
            return;
        }
        if (size > len)
            size = len;

        if (size % 32 == 0)
            WiFi_WriteData(1, addr, data, size / 32, CMD53_BLOCKMODE); // 若size为数据块大小的整数倍, 则采用数据块方式下载
        else
            WiFi_WriteData(1, addr, data, size, 0); // 否则采用字节流方式下载

        if (SDIO->STA)
        {
            // STA不为0则表明有错误
            printf("Data transfer error! SDIO->STA=0x%08x\n", SDIO->STA);
            return;
        }

        len -= size;
        data += size;
    }

    // 等待Firmware启动
    while (WiFi_Read(1, 0x34) != 0xdc || WiFi_Read(1, 0x35) != 0xfe);
    printf("Firmware is successfully downloaded!\n");
}

// SDIO Simplified Specification Version 3.00
// 3. SDIO Card Initialization
void WiFi_Init(void)
{
    uint8_t i, func_cnt;
    printf("Initialization begins...\n");
    SDIO->POWER = SDIO_POWER_PWRCTRL;
    SDIO->CLKCR = SDIO_CLKCR_CLKEN | 178; // 初始化时最高允许的频率: 72MHz/(178+2)=400kHz
    delay(5); // 延时可防止CMD5重发

    // 不需要发送CMD0, 因为SD I/O card的初始化命令是CMD52
    // An I/O only card or the I/O portion of a combo card is NOT reset by CMD0. (See 4.4 Reset for SDIO)

    /* 发送CMD5: IO_SEND_OP_COND */
    SDIO->CMD = SDIO_CMD_CPSMEN | SDIO_CMD_WAITRESP_0 | 5;
    while (SDIO->STA & SDIO_STA_CMDACT);
    WiFi_CheckCmdTimeout(); // 为了保险起见还是要检查一下是否要重发命令
    if (SDIO->STA & SDIO_STA_CMDREND)
    {
        SDIO->ICR = SDIO_ICR_CMDRENDC;
        WiFi_ShowShortResponse();
    }

    /* 设置参数VDD Voltage Window: 3.2~3.4V, 并再次发送CMD5 */
    SDIO->ARG = 0x300000;
    SDIO->CMD = SDIO->CMD;
    while (SDIO->STA & SDIO_STA_CMDACT);
    if (SDIO->STA & SDIO_STA_CMDREND)
    {
        SDIO->ICR = SDIO_ICR_CMDRENDC;
        WiFi_ShowShortResponse();
        if (SDIO->RESP1 & _BV(31))
        {
            // Card is ready to operate after initialization
            func_cnt = (SDIO->RESP1 >> 28) & 7;
            printf("Number of I/O Functions: %d\n", func_cnt);
            printf("Memory Present: %d\n", (SDIO->RESP1 & _BV(27)) != 0);
        }
    }

    /* 获取WiFi模块地址 (CMD3: SEND_RELATIVE_ADDR, Ask the card to publish a new relative address (RCA)) */
    SDIO->ARG = 0;
    SDIO->CMD = SDIO_CMD_CPSMEN | SDIO_CMD_WAITRESP_0 | 3;
    while (SDIO->STA & SDIO_STA_CMDACT);
    if (SDIO->STA & SDIO_STA_CMDREND)
    {
        SDIO->ICR = SDIO_ICR_CMDRENDC;
        rca = SDIO->RESP1 >> 16;
        printf("Relative card address: 0x%04x\n", rca);
    }

    /* 选中WiFi模块 (CMD7: SELECT/DESELECT_CARD) */
    SDIO->ARG = rca << 16;
    SDIO->CMD = SDIO_CMD_CPSMEN | SDIO_CMD_WAITRESP_0 | 7;
    while (SDIO->STA & SDIO_STA_CMDACT);
    if (SDIO->STA & SDIO_STA_CMDREND)
    {
        SDIO->ICR = SDIO_ICR_CMDRENDC;
        printf("Card selected! status=0x%08x\n", SDIO->RESP1);
    }

    // 提高时钟频率
    SDIO->CLKCR = (SDIO->CLKCR & ~SDIO_CLKCR_CLKDIV) | 70; // 72MHz/(70+2)=1MHz
    SDIO->DTIMER = 1000000; // 当频率为1MHz时, 超时时间为1秒
    //SDIO->CLKCR = (SDIO->CLKCR & ~SDIO_CLKCR_CLKDIV) | 1; // 72MHz/(1+2)=24MHz

    /* 选择总线宽度 (Wide Bus Selection) */
    // For an SDIO card a write to the CCCR using CMD52 is used to select bus width. (See 4.5 Bus Width)
    // CMD52: IO_RW_DIRECT, CCCR: Card Common Control Registers
    WiFi_Write(0, 0x07, WiFi_Read(0, 0x07) | 0x02); // Bus Width: 4-bit bus
    SDIO->CLKCR |= SDIO_CLKCR_WIDBUS_0;

    // 设置数据块大小为256字节
    SDIO->DCTRL = SDIO_DCTRL_DBLOCKSIZE_3;
    WiFi_SetBlockSize(0); // 应用到Function 0

    // 初始化Function 1
    WiFi_Write(0, 0x02, 0x02); // IOE1=1 (Enable Function)
    while ((WiFi_Read(0, 3) & 0x02) == 0); // 等到IOR1=1 (I/O Function Ready)

    // 显示CIS信息
    for (i = 0; i <= func_cnt; i++)
        WiFi_ShowCIS(i);
}

// 读寄存器
uint8_t WiFi_Read(uint8_t func, uint32_t addr)
{
    WiFi_SendCMD52(func, addr, NULL, NULL);
    if (SDIO->STA & SDIO_STA_CMDREND)
    {
        SDIO->ICR = SDIO_ICR_CMDRENDC;
        return SDIO->RESP1 & 0xff;
    }
    else
    {
        printf("WiFi_Read failed, SDIO->STA=0x%08x!\n", SDIO->STA);
        return 0;
    }
}

// 读数据
void WiFi_ReadData(uint8_t func, uint32_t addr, uint8_t *data, uint16_t count, uint32_t flags)
{
    uint32_t len;
    if (flags & CMD53_BLOCKMODE)
    {
        len = count * WiFi_GetBlockSize(); // count表示数据块数
        SDIO->DCTRL &= ~SDIO_DCTRL_DTMODE; // Block模式
    }
    else
    {
        len = count; // count表示字节数
        SDIO->DCTRL |= SDIO_DCTRL_DTMODE; // Multibyte模式
    }
    SDIO->DLEN = len;
    SDIO->DCTRL |= SDIO_DCTRL_DTDIR | SDIO_DCTRL_DTEN; // 设置传输方向为从卡到主机

    WiFi_SendCMD53(func, addr, count, flags);
    while (len)
    {
        if (SDIO->STA & SDIO_STA_RXDAVL)
        {
            if (len >= 4)
            {
                *(uint32_t *)data = SDIO->FIFO;
                data += 4;
                len -= 4;
            }
            else
            {
                count = len; // 剩余字节数
                len = SDIO->FIFO; // 剩余数据
                memcpy(data, &len, count);
                len = 0;
            }
        }

        if (SDIO->STA & SDIO_STA_DTIMEOUT)
        {
            printf("Data Timeout!\n");
            SDIO->DCTRL &= ~SDIO_DCTRL_DTEN;
            return;
        }
        else if (SDIO->STA & SDIO_STA_DCRCFAIL)
        {
            printf("Data CRC check failed! %d bytes are lost\n", len);
            SDIO->ICR = SDIO_ICR_DCRCFAILC;
            SDIO->DCTRL &= ~SDIO_DCTRL_DTEN;
            return;
        }
    }

    while (SDIO->STA & (SDIO_STA_CMDACT | SDIO_STA_RXACT));
    SDIO->DCTRL &= ~SDIO_DCTRL_DTEN;

    SDIO->ICR = SDIO_STA_DATAEND | SDIO_ICR_CMDRENDC;
    if (flags & CMD53_BLOCKMODE)
        SDIO->ICR = SDIO_ICR_DBCKENDC;

    // 通过判断SDIO->STA是否等于0可知传输是否成功
}

void WiFi_SendCMD52(uint8_t func, uint32_t addr, uint8_t data, uint32_t flags)
{
    SDIO->ARG = (func << 28) | (addr << 9) | data | flags;
    SDIO->CMD = SDIO_CMD_CPSMEN | SDIO_CMD_WAITRESP_0 | 52;
    while (SDIO->STA & SDIO_STA_CMDACT);
}

void WiFi_SendCMD53(uint8_t func, uint32_t addr, uint16_t count, uint32_t flags)
{
    SDIO->ARG = (func << 28) | (addr << 9) | count | flags;
    SDIO->CMD = SDIO_CMD_CPSMEN | SDIO_CMD_WAITRESP_0 | 53;
}

void WiFi_SetBlockSize(uint8_t func)
{
    // Part E1: 6.9 Card Common Control Registers (CCCR), 6.10 Function Basic Registers (FBR)
    uint16_t size = WiFi_GetBlockSize();
    WiFi_Write(0, (func << 8) | 0x10, size & 0xff);
    WiFi_Write(0, (func << 8) | 0x11, size >> 8);
}

void WiFi_ShowCIS(uint8_t func)
{
    uint8_t data[255];
    uint8_t i, len;
    uint8_t tpl_code, tpl_link; // 16.2 Basic Tuple Format and Tuple Chain Structure
    uint32_t cis_ptr;

    // 获取CIS的地址
    cis_ptr = (func << 8) | 0x9;
    cis_ptr    = WiFi_Read(0, cis_ptr) | (WiFi_Read(0, cis_ptr + 1) << 8) | (WiFi_Read(0, cis_ptr + 2) << 16);
    printf("Pointer to Function %d Card Information Structure (CIS): 0x%08x\n", func, cis_ptr);

    // 遍历CIS, 直到尾节点
    while ((tpl_code = WiFi_Read(0, cis_ptr++)) != CISTPL_END)
    {
        if (tpl_code == CISTPL_NULL)
            continue;

        tpl_link = WiFi_Read(0, cis_ptr++); // 本结点数据的大小
        for (i = 0; i < tpl_link; i++)
            data[i] = WiFi_Read(0, cis_ptr + i);

        printf("[CIS Tuple 0x%02x] addr=0x%08x size=%d\n", tpl_code, cis_ptr - 2, tpl_link);
        dump_data(data, tpl_link);
        switch (tpl_code)
        {
        case CISTPL_VERS_1:
            i = 2;
            while (data[i] != 0xff)
            {
                len = strlen((char *)&data[i]);
                if (len != 0)
                    printf("%s\n", data + i);
                i += len + 1;
            }
            break;
        case CISTPL_MANFID:
            // 16.6 CISTPL_MANFID: Manufacturer Identification String Tuple
            printf("SDIO Card manufacturer code: 0x%04x\n", *(uint16_t *)data); // TPLMID_MANF
            printf("manufacturer information (Part Number and/or Revision): 0x%04x\n", *(uint16_t *)(data + 2)); // TPLMID_CARD
            break;
        case CISTPL_FUNCID:
            // 16.7.1 CISTPL_FUNCID: Function Identification Tuple
            printf("Card function code: 0x%02x\n", data[0]); // TPLFID_FUNCTION
            printf("System initialization bit mask: 0x%02x\n", data[1]); // TPLFID_SYSINIT
            break;
        case CISTPL_FUNCE:
            // 16.7.2 CISTPL_FUNCE: Function Extension Tuple
            if (data[0] == 0)
            {
                // 16.7.3 CISTPL_FUNCE Tuple for Function 0 (Extended Data 00h)
                printf("maximum block size: %d\n", *(uint16_t *)(data + 1));
                printf("maximum transfer rate code: 0x%02x\n", data[3]);
            }
            else
            {
                // 16.7.4 CISTPL_FUNCE Tuple for Function 1-7 (Extended Data 01h)
                printf("maximum block size: %d\n", *(uint16_t *)(data + 0x0c)); // TPLFE_MAX_BLK_SIZE
            }
        }

        cis_ptr += tpl_link;
        if (tpl_link == 0xff)
            break; // 当TPL_LINK为0xff时说明当前结点为尾节点
    }
}

void WiFi_ShowShortResponse(void)
{
    printf("Command response received: CMD%d, RESP_%08x\n", SDIO->RESPCMD, SDIO->RESP1);
}

void WiFi_Wait(void)
{
    uint8_t status;
    do
    {
        status = WiFi_Read(1, WIFI_CARDSTATUS);
    } while ((status & WIFI_CARDSTATUS_IOREADY) == 0 || (status & WIFI_CARDSTATUS_DNLDCARDRDY) == 0);
}

// 写寄存器, 返回写入后寄存器的实际内容
uint8_t WiFi_Write(uint8_t func, uint32_t addr, uint8_t value)
{
    WiFi_SendCMD52(func, addr, value, CMD52_WRITE | CMD52_READAFTERWRITE);
    if (SDIO->STA & SDIO_STA_CMDREND)
    {
        SDIO->ICR = SDIO_ICR_CMDRENDC;
        return SDIO->RESP1 & 0xff;
    }
    else
    {
        printf("WiFi_Write failed, SDIO->STA=0x%08x!\n", SDIO->STA);
        return 0;
    }
}

// 写数据
void WiFi_WriteData(uint8_t func, uint32_t addr, const uint8_t *data, uint16_t count, uint32_t flags)
{
    uint32_t len;
    if (flags & CMD53_BLOCKMODE)
    {
        len = count * WiFi_GetBlockSize();
        SDIO->DCTRL &= ~SDIO_DCTRL_DTMODE;
    }
    else
    {
        len = count;
        SDIO->DCTRL |= SDIO_DCTRL_DTMODE;
    }
    SDIO->DLEN = len;
    SDIO->DCTRL &= ~SDIO_DCTRL_DTDIR; // 设置传输方向: 从主机到外设

    WiFi_SendCMD53(func, addr, count, flags | CMD53_WRITE);
    while (SDIO->STA & SDIO_STA_CMDACT);
    if ((SDIO->STA & SDIO_STA_CMDREND) == 0)
        return;
    SDIO->ICR = SDIO_ICR_CMDRENDC;

    SDIO->DCTRL |= SDIO_DCTRL_DTEN; // 开始发送数据
    while (len)
    {
        if (len >= 4)
        {
            SDIO->FIFO = *(uint32_t *)data;
            data += 4;
            len -= 4;
        }
        else
        {
            count = len; // count变量用于存放剩余字节数
            len = 0; // 用于装载剩余的数据(len是32位的变量)
            memcpy(&len, data, count);
            SDIO->FIFO = len; // 发送剩余的数据, 高位用0填充
            len = 0; // 清零, 用于退出循环
        }
        while (SDIO->STA & SDIO_STA_TXFIFOF); // 如果FIFO已满则等待
    }

    while (SDIO->STA & SDIO_STA_TXACT);
    SDIO->DCTRL &= ~SDIO_DCTRL_DTEN; // 数据传输完毕后DTEN应及时清零, 防止后续对DCTRL寄存器操作后误启动数据传输导致超时或CRC校验错误

    SDIO->ICR = SDIO_ICR_DATAENDC;
    if (flags & CMD53_BLOCKMODE)
        SDIO->ICR = SDIO_ICR_DBCKENDC;
}

巨大八爪鱼

一派护法十九级

7楼发表于：2017-7-8 21:18

其实，对于固件下载的具体步骤、方法，Marvell是有详细的文档说明的（属于机密文档，官方网站上无法下载到，但能够从淘宝卖家那里获得）
（1）WLAN Subsystem Host Driver, Firmware, Interface Firmware Specification v10.0
（2）WLAN Subsystem Linux Driver Porting Guide
（3）88W8686 Host Interface Registers

巨大八爪鱼

一派护法十九级

8楼发表于：2017-7-8 21:19

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