micropython/ports/mimxrt/sdcard.h

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3.6 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Philipp Ebensberger
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef MICROPY_INCLUDED_MIMXRT_SDCARD_H
#define MICROPY_INCLUDED_MIMXRT_SDCARD_H
#include "modmachine.h"
#include "pin.h"
#include "fsl_usdhc.h"
// ---
// SD Card public defines
// ---
#define SDCARD_DEFAULT_BLOCK_SIZE (512U)
#define SDCARD_CLOCK_400KHZ (400000U)
#define SDCARD_CLOCK_25MHZ (25000000U)
#define SDCARD_CLOCK_50MHZ (50000000U)
typedef struct _mimxrt_sdcard_pin_t {
const machine_pin_obj_t *pin;
uint8_t af_idx;
} mimxrt_sdcard_pin_t;
typedef struct _mimxrt_sdcard_obj_pins_t {
mimxrt_sdcard_pin_t cmd;
mimxrt_sdcard_pin_t clk;
mimxrt_sdcard_pin_t cd_b;
mimxrt_sdcard_pin_t data0;
mimxrt_sdcard_pin_t data1;
mimxrt_sdcard_pin_t data2;
mimxrt_sdcard_pin_t data3;
} mimxrt_sdcard_obj_pins_t;
typedef volatile struct _mimxrt_sdcard_status_obj_t {
bool initialized;
bool inserted;
} mimxrt_sdcard_status_obj_t;
typedef struct _mimxrt_sdcard_obj_t {
mp_obj_base_t base;
USDHC_Type *usdhc_inst;
usdhc_handle_t handle;
mimxrt_sdcard_status_obj_t *state;
uint16_t block_len;
uint32_t base_clk;
uint32_t bus_clk;
uint32_t rca;
uint32_t block_count;
uint32_t status;
uint32_t oper_cond;
const mimxrt_sdcard_obj_pins_t *pins;
} mimxrt_sdcard_obj_t;
// ---
// SD Card object instances
// ---
#if MICROPY_PY_MACHINE_SDCARD && (defined MICROPY_USDHC1 || defined MICROPY_USDHC2)
enum {
#if defined MICROPY_USDHC1 && USDHC1_AVAIL
SDCARD_OBJ_USDHC1_IDX,
#endif
#if defined MICROPY_USDHC2 && USDHC2_AVAIL
SDCARD_OBJ_USDHC2_IDX,
#endif
SDCARD_OBJ_USDHC_N
};
#endif
extern mimxrt_sdcard_obj_t mimxrt_sdcard_objs[SDCARD_OBJ_USDHC_N];
// ---
// SD Card functions
// ---
void sdcard_init(mimxrt_sdcard_obj_t *card, uint32_t base_clk);
void sdcard_deinit(mimxrt_sdcard_obj_t *card);
void sdcard_init_pins(mimxrt_sdcard_obj_t *card);
bool sdcard_read(mimxrt_sdcard_obj_t *card, uint8_t *buffer, uint32_t block_num, uint32_t block_count);
bool sdcard_write(mimxrt_sdcard_obj_t *card, uint8_t *buffer, uint32_t block_num, uint32_t block_count);
bool sdcard_set_active(mimxrt_sdcard_obj_t *card);
bool sdcard_volt_validation(mimxrt_sdcard_obj_t *card);
bool sdcard_power_on(mimxrt_sdcard_obj_t *self);
bool sdcard_power_off(mimxrt_sdcard_obj_t *self);
bool sdcard_detect(mimxrt_sdcard_obj_t *self);
static inline bool sdcard_state_initialized(mimxrt_sdcard_obj_t *card) {
return card->state->initialized;
}
#endif // MICROPY_INCLUDED_MIMXRT_SDCARD_H