帮我写一段stm32l431 sd卡写入的程序,要求循环写入512个字节,
时间: 2023-04-04 22:01:44 浏览: 73
好的,以下是一个简单的循环写入512个字节的程序示例:
#include "stm32l431xx.h"
#include "stm32l4xx_hal.h"
#include "stm32l4xx_hal_sd.h"
#define SD_CARD_BLOCK_SIZE 512
SD_HandleTypeDef hsd;
uint8_t sd_card_buffer[SD_CARD_BLOCK_SIZE];
int main(void)
{
HAL_Init();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_SDMMC1_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_SDMMC1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
hsd.Instance = SDMMC1;
hsd.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING;
hsd.Init.ClockBypass = SDMMC_CLOCK_BYPASS_DISABLE;
hsd.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE;
hsd.Init.BusWide = SDMMC_BUS_WIDE_1B;
hsd.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_DISABLE;
hsd.Init.ClockDiv = ;
HAL_SD_Init(&hsd);
HAL_SD_ConfigWideBusOperation(&hsd, SDMMC_BUS_WIDE_4B);
while (1)
{
for (int i = ; i < SD_CARD_BLOCK_SIZE; i++)
{
sd_card_buffer[i] = i % 256;
}
HAL_SD_WriteBlocks_DMA(&hsd, sd_card_buffer, , 1);
while (HAL_SD_GetCardState(&hsd) != HAL_SD_CARD_TRANSFER)
{
// wait for write to complete
}
}
}
注意:此示例仅供参考,实际使用时需要根据具体情况进行修改和调整。