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发表于 2019-9-5 10:24:47
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MMC_HandleTypeDef emmc_handler;
//==================================================================
//函数名: EMMC_Init
//功能: 初始化EMMC
//参数: 无
//返回值: 无
//日期: 2018-2-23
//==================================================================
u8 EMMC_Init(void)
{
emmc_handler.Instance = SDMMC1;
emmc_handler.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING;
emmc_handler.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE;
emmc_handler.Init.BusWide = SDMMC_BUS_WIDE_1B;
emmc_handler.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_ENABLE;
emmc_handler.Init.ClockDiv =8;
if (HAL_MMC_Init(&emmc_handler) != HAL_OK)
{
printf("emmc init error");
return ERROR;
}
if (HAL_MMC_ConfigWideBusOperation(&emmc_handler, SDMMC_BUS_WIDE_8B) != HAL_OK)
{
printf("8bit mode failed\r\n");
return ERROR;
}
while(HAL_MMC_GetState(&emmc_handler) != HAL_MMC_STATE_READY);
return OK;
}
//==================================================================
//函数名: HAL_MMC_MspInit
//功能: EMMC底层驱动
//参数: hmmc -> EMMC句柄
//返回值: 无
//日期: 2018-2-23
//==================================================================
void HAL_MMC_MspInit(MMC_HandleTypeDef* hmmc)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(hmmc->Instance==SDMMC1)
{
/* Peripheral clock enable */
__HAL_RCC_SDMMC1_CLK_ENABLE();
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
/**SDMMC1 GPIO Configuration
PB9 ------> SDMMC1_D5
PB8 ------> SDMMC1_D4
PD2 ------> SDMMC1_CMD
PC11 ------> SDMMC1_D3
PC10 ------> SDMMC1_D2
PC12 ------> SDMMC1_CK
PC9 ------> SDMMC1_D1
PC7 ------> SDMMC1_D7
PC8 ------> SDMMC1_D0
PC6 ------> SDMMC1_D6
*/
GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_SDIO1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_SDIO1;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_10|GPIO_PIN_12|GPIO_PIN_9
|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_SDIO1;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
//emmc复位脚 C10 -》 PA11
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; //推挽输出
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_11,GPIO_PIN_SET);
}
} |
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