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【程序】Marvell 88W8686 WiFi模塊的固件下載代碼

	1樓巨大八爪鱼 2017-7-6 22:27 【main.c】 #include <stdio.h> #include <stm32f10x.h> #include <string.h> #include "WiFi.h" // 延時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, 非循環模式 TIM6->EGR = TIM_EGR_UG; // 保存設置 TIM6->CR1 \|= TIM_CR1_CEN; // 開始計時 while ((TIM6->SR & TIM_SR_UIF) == 0); // 等待計時完畢 TIM6->SR &= ~TIM_SR_UIF; // 清除溢出標誌 } 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為外接的WiFi模塊電源開關, PB12=0時打開WiFi模塊 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); } }
	2樓巨大八爪鱼 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);
	4樓巨大八爪鱼 2017-7-6 22:29 【程序運行結果】 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] 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SDIO->STA=0x00000000
	5樓巨大八爪鱼 2017-7-6 22:31 兩個固件文件（.bin）可在marvell的官方網站上下載到。【獲取固件數組的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); // 設置當前目錄 create("helper_sd.bin", "helper_sd.c", "firmware_helper_sd"); create("sd8686.bin", "sd8686.c", "firmware_sd8686"); return 0; }
	6樓巨大八爪鱼 2017-7-7 18:25 代碼更新【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); // 檢查命令是否收到了回應, 若沒收到則重發命令 void WiFi_CheckCmdTimeout(void) { while (SDIO->STA & SDIO_STA_CTIMEOUT) { SDIO->ICR = SDIO_ICR_CTIMEOUTC; // 清除標誌 SDIO->CMD = SDIO->CMD; // 重發 printf("Timeout! Resend CMD%d\n", SDIO->CMD & SDIO_CMD_CMDINDEX); while (SDIO->STA & SDIO_STA_CMDACT); } } // marvell-88w8686-固件下載程序說明.doc void WiFi_DownloadFirmware(void) { uint8_t helper_buf[64]; const uint8_t data; uint16_t size; uint32_t addr, len; // 塊大小設為32 SDIO->DCTRL &= ~SDIO_DCTRL_DTEN; SDIO->DCTRL = (SDIO->DCTRL & ~SDIO_DCTRL_DBLOCKSIZE) \| SDIO_DCTRL_DBLOCKSIZE_2 \| SDIO_DCTRL_DBLOCKSIZE_0; WiFi_SetBlockSize(1); // 應用到Function 1 // 下載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) { // 每次下載64位元組, 其中前4位元組為本次下載的數據量 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); // 以空數據包結束 // 下載固件 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); // 獲取本次下載的位元組數 printf("Required: %d bytes, Remaining: %d bytes\n", size, len); if (size & 1) { printf("Error: an odd size is invalid!\n"); // 若size為奇數(如17)則認為出錯 return; } if (size > len) size = len; if (size % 32 == 0) WiFi_WriteData(1, addr, data, size / 32, CMD53_BLOCKMODE); // 若size為數據塊大小的整數倍, 則採用數據塊方式下載 else WiFi_WriteData(1, addr, data, size, 0); // 否則採用位元組流方式下載 if (SDIO->STA) { // STA不為0則表明有錯誤 printf("Data transfer error! SDIO->STA=0x%08x\n", SDIO->STA); return; } len -= size; data += size; } // 等待Firmware啟動 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; // 初始化時最高允許的頻率: 72MHz/(178+2)=400kHz delay(5); // 延時可防止CMD5重發 // 不需要發送CMD0, 因為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) /* 發送CMD5: IO_SEND_OP_COND / SDIO->CMD = SDIO_CMD_CPSMEN \| SDIO_CMD_WAITRESP_0 \| 5; while (SDIO->STA & SDIO_STA_CMDACT); WiFi_CheckCmdTimeout(); // 為了保險起見還是要檢查一下是否要重發命令 if (SDIO->STA & SDIO_STA_CMDREND) { SDIO->ICR = SDIO_ICR_CMDRENDC; WiFi_ShowShortResponse(); } / 設置參數VDD Voltage Window: 3.2~3.4V, 並再次發送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); } } / 獲取WiFi模塊地址 (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); } / 選中WiFi模塊 (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); } // 提高時鐘頻率 SDIO->CLKCR = (SDIO->CLKCR & ~SDIO_CLKCR_CLKDIV) \| 70; // 72MHz/(70+2)=1MHz SDIO->DTIMER = 1000000; // 當頻率為1MHz時, 超時時間為1秒 //SDIO->CLKCR = (SDIO->CLKCR & ~SDIO_CLKCR_CLKDIV) \| 1; // 72MHz/(1+2)=24MHz / 選擇總線寬度 (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; // 設置數據塊大小為256位元組 SDIO->DCTRL = SDIO_DCTRL_DBLOCKSIZE_3; WiFi_SetBlockSize(0); // 應用到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) // 顯示CIS信息 for (i = 0; i <= func_cnt; i++) WiFi_ShowCIS(i); } // 讀寄存器 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; } } // 讀數據 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表示數據塊數 SDIO->DCTRL &= ~SDIO_DCTRL_DTMODE; // Block模式 } else { len = count; // count表示位元組數 SDIO->DCTRL \|= SDIO_DCTRL_DTMODE; // Multibyte模式 } SDIO->DLEN = len; SDIO->DCTRL \|= SDIO_DCTRL_DTDIR \| SDIO_DCTRL_DTEN; // 設置傳輸方向為從卡到主機 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; // 剩餘位元組數 len = SDIO->FIFO; // 剩餘數據 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; // 通過判斷SDIO->STA是否等於0可知傳輸是否成功 } 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; // 獲取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); // 遍歷CIS, 直到尾節點 while ((tpl_code = WiFi_Read(0, cis_ptr++)) != CISTPL_END) { if (tpl_code == CISTPL_NULL) continue; tpl_link = WiFi_Read(0, cis_ptr++); // 本結點數據的大小 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; // 當TPL_LINK為0xff時說明當前結點為尾節點 } } 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); } // 寫寄存器, 返回寫入後寄存器的實際內容 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; } } // 寫數據 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; // 設置傳輸方向: 從主機到外設 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; // 開始發送數據 while (len) { if (len >= 4) { SDIO->FIFO = (uint32_t )data; data += 4; len -= 4; } else { count = len; // count變量用於存放剩餘位元組數 len = 0; // 用於裝載剩餘的數據(len是32位的變量) memcpy(&len, data, count); SDIO->FIFO = len; // 發送剩餘的數據, 高位用0填充 len = 0; // 清零, 用於退出循環 } while (SDIO->STA & SDIO_STA_TXFIFOF); // 如果FIFO已滿則等待 } while (SDIO->STA & SDIO_STA_TXACT); SDIO->DCTRL &= ~SDIO_DCTRL_DTEN; // 數據傳輸完畢後DTEN應及時清零, 防止後續對DCTRL寄存器操作後誤啟動數據傳輸導致超時或CRC校驗錯誤 SDIO->ICR = SDIO_ICR_DATAENDC; if (flags & CMD53_BLOCKMODE) SDIO->ICR = SDIO_ICR_DBCKENDC; }
	7樓巨大八爪鱼 2017-7-8 21:18 其實，對於固件下載的具體步驟、方法，Marvell是有詳細的文檔說明的（屬於機密文檔，官方網站上無法下載到，但能夠從淘寶賣家那裡獲得）（1）WLAN Subsystem Host Driver, Firmware, Interface Firmware Specification v10.0 （2）WLAN Subsystem Linux Driver Porting Guide （3）88W8686 Host Interface Registers
	8樓巨大八爪鱼 2017-7-8 21:19

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