STM32驱动eMMC读写数据& }, Y3 W" n. k1 h& j
参照 JEDEC eMMC标准:JESD84-B51 (Revision of JESD84-B50.1, July 2014)
# B! N4 \0 `# Q& `0 ^驱动芯片采用stm32h7xx芯片。通过官方HAL库中stm32h7xx_hal_mmc.h文件驱动,采用8bit数据传输模式,与SD卡驱动类似。实测写入速度6-10MB/s左右。2 k5 W8 r1 O; E8 v/ |" a0 ^
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初始化代码清单:* B& o* L/ K! b
}! F% V8 b7 N9 i: t. K# n. b5 T1 W- HAL_StatusTypeDef SDMMC1_MMC_Init(void)
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: @2 _" Z" t3 C+ g" c0 o' v% Y4 _ - hmmc1.Instance = SDMMC1;
9 u' o: r& h' Q6 S7 k) k: w - hmmc1.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING;- c' P: G7 r/ D* g. I! I' D5 Q
- hmmc1.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE;$ P& w: p, @( f7 z2 W
- hmmc1.Init.BusWide = SDMMC_BUS_WIDE_8B;+ \/ f! y0 l% X, h
- hmmc1.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_DISABLE;
) a) k- g) p+ W& v+ e$ ?. G2 r* {2 M - hmmc1.Init.ClockDiv = 1;8 K2 V( t9 p) t$ X' W+ V5 Q
- if (HAL_MMC_Init(&hmmc1) != HAL_OK)0 C2 C& [% r% u2 R X4 p
- {
; T- G8 W) q0 D. t% }3 O - Error_Handler();* ^# \3 I( a2 |
- }
3 w9 n% d2 l) I - return HAL_OK;
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底层驱动代码清单:
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3 v9 F4 y, I; W% c) d2 l- void HAL_MMC_MspInit(MMC_HandleTypeDef* hmmc)
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- GPIO_InitTypeDef GPIO_InitStruct = {0};" V a9 K- i; l9 B w
- if(hmmc->Instance==SDMMC1)
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2 d/ h4 I; X3 G& F& V - /* USER CODE BEGIN SDMMC1_MspInit 0 */
1 K, r1 j: W* p. O/ @1 \; |. y - /* Peripheral clock enable */
! P; G; e1 b- z1 z - __HAL_RCC_SDMMC1_CLK_ENABLE();
8 i5 @/ h' E9 \' h - __HAL_RCC_GPIOC_CLK_ENABLE();
/ }6 B! @$ @) u6 F - __HAL_RCC_GPIOD_CLK_ENABLE();
- S6 a* \$ r8 I - /**SDMMC1 GPIO Configuration 7 {( [& Z3 b' T; Q/ }# I0 u( V5 F
- PC8 ------> SDMMC1_D0* X' ^9 f" P1 f& Q
- PC9 ------> SDMMC1_D1 2 G+ S$ @+ Y9 @6 {/ l
- PC10 ------> SDMMC1_D2
5 z' i9 r* r& m; v - PC11 ------> SDMMC1_D3$ l; d; S* D' }8 u6 s2 l8 \+ v7 T0 I
- PB8 ------> SDMMC1_D4
9 X& L2 B% { n" K8 ? - PB9 ------> SDMMC1_D5
" p( Y- J" ~# }( ]6 }1 ` - PC6 ------> SDMMC1_D6
' W: U1 z1 B* m - PC7 ------> SDMMC1_D76 k1 {' S7 W8 \/ Y9 q
- PC12 ------> SDMMC1_CK; f& c! I% W% W/ t0 b, [
- PD2 ------> SDMMC1_CMD3 B( P8 m& p3 X. Y' o. y
- */
* z+ r$ ?1 {: l) N5 i# x8 u* G2 X3 r - GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_8
7 o$ Z, D; e, x( P+ l - |GPIO_PIN_9|GPIO_PIN_6|GPIO_PIN_7;& T t; P% I3 L2 W0 x/ @; k* N
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
, F1 k7 E; e: l: C# S - GPIO_InitStruct.Pull = GPIO_NOPULL;
) | B$ A% V& V2 f7 f - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
$ y2 U q* ^7 n - GPIO_InitStruct.Alternate = GPIO_AF12_SDIO1;
|3 Z p5 |7 w - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);$ g3 E. g. p# k7 [ ~+ l9 y l o( X% M
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- GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9;
A9 _, M' S% H6 d3 l, p. i' m - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
8 y2 A' N r X, _ - GPIO_InitStruct.Pull = GPIO_NOPULL;$ Y. T Q5 i$ N' n
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;+ v3 t4 J( D( | c& u& }" f' C. _- L
- GPIO_InitStruct.Alternate = GPIO_AF12_SDIO1;
/ K, c* g& w" A3 W7 } - HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);' i. s' m% n3 c- W' k
; i7 a& n; i. W( x( N* H" E6 ]- GPIO_InitStruct.Pin = GPIO_PIN_2;- C# {$ w2 u4 @
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;9 Z; w' ]! i. Q
- GPIO_InitStruct.Pull = GPIO_NOPULL;2 I) w/ Q# q) H% U3 L! T
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;* ~" X2 Q9 J" N! Y
- GPIO_InitStruct.Alternate = GPIO_AF12_SDIO1;' U% M, n" S3 f9 _6 H+ g. e; f0 P) O
- HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);. h. F$ y! ~ |) Q2 d
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- HAL_NVIC_SetPriority(SDMMC1_IRQn,1,1); //配置SDMMC1中断+ b& B8 Y7 |9 |, a' R# {
- HAL_NVIC_EnableIRQ(SDMMC1_IRQn); //使能SDMMC1中断2 v6 I8 ~6 _, P2 [8 z' l5 h
- HAL_NVIC_SetPriority(SysTick_IRQn, 0x0E ,0);
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在DMA模式下,从MMC卡的指定地址读取数据:
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/ U, T, w: \$ c4 e8 j V9 C: E9 o2 |' m- /*** G3 n, H$ f0 }' L! p0 l) B4 l
- * @brief 在DMA模式下,从MMC卡的指定地址读取数据
' c+ ?# k2 c/ A$ I" P. f9 K3 y- _ - * @param pData:指向将包含要传输的数据的缓冲区的指针
f7 \1 [* Z* x+ { - * @param ReadAddr:要读取数据的地址
9 D" d3 I4 q( P" b# v - * @param NumOfBlocks:要读取的MMC块数量
1 F/ [0 X7 h2 L( z* Y6 {' t' ]1 c% d - * @retval eMMC状态
1 W4 T+ S$ S \) y! a - */9 |- G J/ G4 {4 g S# q
- uint8_t BSP_MMC_ReadBlocks_DMA(uint8_t *pData, uint32_t ReadAddr, uint32_t NumOfBlocks)
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3 k! s$ d+ W2 Z/ A/ X* `8 G( \6 b - HAL_StatusTypeDef Status = HAL_OK;5 |) ^1 J2 E0 @8 \( S
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- if(HAL_MMC_ReadBlocks_DMA(&hmmc1, pData, ReadAddr, NumOfBlocks) != HAL_OK)' V- ^6 ^" n/ o( Q' m# r
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- Status = HAL_ERROR;
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& M3 X: M$ x; C- { - return Status; ; e5 s* M4 t- e# G! f. E3 d
- }
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2 X8 {' G" V5 U在DMA模式下,向MMC卡的指定地址写入数据:
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; a2 g, P5 J" Z; w) N- /**6 p/ v8 q' b8 D( N% \/ i0 n* a4 K
- * @brief 在DMA模式下,向MMC卡的指定地址写入数据2 D& o0 U3 u# b( m+ U' L
- * @param pData:指向将包含要传输的数据的缓冲区的指针
; R4 G* e5 \! v. |$ l$ W - * @param WriteAddr:要写入数据的地址
9 D8 z$ E/ s6 l3 { - * @param NumOfBlocks:要写的MMC块的数量: L* l0 d7 t+ s3 H, K, X( x
- * @retval MMC状态* x& }0 d6 f. t0 Y; A
- */8 U2 D2 _. k" U; Y! u& i e
- uint8_t BSP_MMC_WriteBlocks_DMA(uint8_t *pData, uint32_t WriteAddr, uint32_t NumOfBlocks)
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; H: F+ R& h. _0 H, l3 M7 m - HAL_StatusTypeDef Status = HAL_OK;$ c5 V7 z0 F: `
( p3 ^4 h$ e# Y6 \5 q- /* Write block(s) in DMA transfer mode */5 W, U5 q/ Q8 O; M9 o) N
- if (HAL_MMC_WriteBlocks_DMA(&hmmc1, pData, WriteAddr, NumOfBlocks) != HAL_OK)+ K ]2 ~2 S( E
- {
- D+ ~ R' h" t5 m/ Z; R3 | - Status = HAL_ERROR;* E+ @. |% N v& C3 V
- }
7 V/ g& r7 Y/ Q! `4 Y$ n1 M2 G - return Status; |4 L" o& J4 J/ p0 k& Q
- }
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擦除eMMC卡数据:+ E+ ?( b9 k6 V9 x) ^
. V1 Z! F: G Z, U' u9 F2 ]- /**
. m. z+ `4 I7 {. P1 P3 \ - * @brief 擦除eMMC卡数据
( B; \, A2 \# x* ~8 y) M - * @param 无
9 {+ W+ e( j6 f - * @retval 无' o2 j& h5 s. w
- */
0 r' y" N+ [: V2 p - void MMC_EraseTest(void)+ }% M# k& V3 e+ ^
- {
/ M. Q$ w( t3 E% v& r% V - HAL_StatusTypeDef Status = HAL_OK;
* k9 {" m2 ?* c2 g' U, o: Y% O* a - HAL_StatusTypeDef EraseStatus = HAL_OK;
$ U% R0 R; T# X$ \ - if (Status == HAL_OK)
5 w$ @! \* T+ d! U4 C - {
, x8 V0 M/ U/ g. ~0 u: Q A - Status = HAL_MMC_Erase(&hmmc1, 0x00, (BLOCK_SIZE * NUMBER_OF_BLOCKS));
. d8 H2 K* F$ d - //等待擦除完成$ ~; v7 T0 F! G
- if(Wait_SDCARD_Ready() != HAL_OK)
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- EraseStatus = HAL_ERROR;8 C3 O& f$ }1 w) c
- }
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8 x- I% v- f4 l* ~! G7 D - if(EraseStatus != HAL_OK): B# U8 m) g( m) @* `2 ^3 m! D
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- Error_Handler();. Y: d7 ?' l% p8 Q
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- }
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4 Y) @$ e/ V7 P/ aeMMC卡等待擦除完成函数:
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- /**7 u$ r7 \$ z2 P9 e" u& n) w
- * @brief eMMC卡等待擦除完成函数
9 D: ~5 T/ ?! l$ A' s - * @param 无, _6 h8 @: C8 A6 l& }
- * @retval HAL_OK:擦除成功;HAL_ERROR:擦除失败. N( c+ A0 o: B" A9 u, o- K
- */
. D( p- z X' H. W+ r* K - static HAL_StatusTypeDef Wait_SDCARD_Ready(void)/ ~& E2 w1 L9 x+ w8 b$ @
- {
P7 ?) k. v% M s# x; I) R, k - uint32_t loop = MMC_TIMEOUT;( [5 r$ L* M5 \8 e9 m
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- /* Wait for the Erasing process is completed */2 `4 L, @/ b4 E& K! b, j% l; q
- /* Verify that SD card is ready to use after the Erase */
6 o2 x K3 x, E, } D! | - while(loop > 0)
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1 l/ O) m& N3 f8 ~" d: E& |% ? - loop--;
. [7 Z% _: b3 G$ K - if(HAL_MMC_GetCardState(&hmmc1) == HAL_MMC_CARD_TRANSFER)2 K3 M0 C5 t: B/ }( t- F2 P. H$ A% g
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- return HAL_OK;
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- return HAL_ERROR;! @8 M: D9 y; U+ C: J! f2 S
- }
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# z4 G- J( C: p2 C2 ~最近移植的eMMC卡的驱动程序,分享出来希望对各位开发者有所帮助。还移植了FATFS文件系统到eMMC驱动程序中,之后整理好再分享。
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