145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
#include STM32_HAL_H
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#include <string.h>
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#include "sdcard.h"
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#define IRQ_PRI_SDIO 4
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#define IRQ_SUBPRI_SDIO 0
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static SD_HandleTypeDef sd_handle;
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int sdcard_init(void) {
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// invalidate the sd_handle
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sd_handle.Instance = NULL;
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GPIO_InitTypeDef GPIO_InitStructure;
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// configure SD GPIO
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GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStructure.Pull = GPIO_PULLUP;
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GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
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GPIO_InitStructure.Alternate = GPIO_AF12_SDIO;
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GPIO_InitStructure.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = GPIO_PIN_2;
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HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
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// configure the SD card detect pin
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GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
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GPIO_InitStructure.Pull = GPIO_PULLUP;
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GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
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GPIO_InitStructure.Pin = GPIO_PIN_13;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
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return 0;
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}
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void HAL_SD_MspInit(SD_HandleTypeDef *hsd) {
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// enable SDIO clock
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__SDIO_CLK_ENABLE();
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// NVIC configuration for SDIO interrupts
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HAL_NVIC_SetPriority(SDIO_IRQn, IRQ_PRI_SDIO, IRQ_SUBPRI_SDIO);
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HAL_NVIC_EnableIRQ(SDIO_IRQn);
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// GPIO have already been initialised by sdcard_init
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}
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void HAL_SD_MspDeInit(SD_HandleTypeDef *hsd) {
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HAL_NVIC_DisableIRQ(SDIO_IRQn);
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__SDIO_CLK_DISABLE();
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}
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bool sdcard_is_present(void) {
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return GPIO_PIN_RESET == HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13);
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}
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bool sdcard_power_on(void) {
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if (!sdcard_is_present()) {
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return false;
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}
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if (sd_handle.Instance) {
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return true;
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}
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// SD device interface configuration
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sd_handle.Instance = SDIO;
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sd_handle.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;
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sd_handle.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;
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sd_handle.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_ENABLE;
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sd_handle.Init.BusWide = SDIO_BUS_WIDE_1B;
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sd_handle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;
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sd_handle.Init.ClockDiv = SDIO_TRANSFER_CLK_DIV;
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// init the SD interface, with retry if it's not ready yet
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HAL_SD_CardInfoTypedef cardinfo;
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for (int retry = 10; HAL_SD_Init(&sd_handle, &cardinfo) != SD_OK; retry--) {
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if (retry == 0) {
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goto error;
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}
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HAL_Delay(50);
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}
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// configure the SD bus width for wide operation
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if (HAL_SD_WideBusOperation_Config(&sd_handle, SDIO_BUS_WIDE_4B) != SD_OK) {
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HAL_SD_DeInit(&sd_handle);
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goto error;
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}
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return true;
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error:
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sd_handle.Instance = NULL;
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return false;
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}
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void sdcard_power_off(void) {
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if (!sd_handle.Instance) {
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return;
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}
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HAL_SD_DeInit(&sd_handle);
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sd_handle.Instance = NULL;
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}
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uint64_t sdcard_get_capacity_in_bytes(void) {
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if (sd_handle.Instance == NULL) {
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return 0;
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}
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HAL_SD_CardInfoTypedef cardinfo;
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HAL_SD_Get_CardInfo(&sd_handle, &cardinfo);
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return cardinfo.CardCapacity;
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}
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void SDIO_IRQHandler(void) {
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HAL_SD_IRQHandler(&sd_handle);
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}
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uint32_t sdcard_read_blocks(void *dest, uint32_t block_num, uint32_t num_blocks) {
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// check that SD card is initialised
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if (sd_handle.Instance == NULL) {
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return SD_ERROR;
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}
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// check that dest pointer is aligned on a 4-byte boundary
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if (((uint32_t)dest & 3) != 0) {
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return SD_INVALID_PARAMETER;
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}
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return HAL_SD_ReadBlocks_BlockNumber(&sd_handle, (uint32_t*)dest, block_num, SDCARD_BLOCK_SIZE, num_blocks);
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}
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uint32_t sdcard_write_blocks(const void *src, uint32_t block_num, uint32_t num_blocks) {
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// check that SD card is initialised
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if (sd_handle.Instance == NULL) {
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return SD_ERROR;
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}
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// check that src pointer is aligned on a 4-byte boundary
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if (((uint32_t)src & 3) != 0) {
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return SD_INVALID_PARAMETER;
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}
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return HAL_SD_WriteBlocks_BlockNumber(&sd_handle, (uint32_t*)src, block_num, SDCARD_BLOCK_SIZE, num_blocks);
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}
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