diff --git a/ports/esp32/Makefile b/ports/esp32/Makefile
index ea90c9f3f5a9d7bececed164183e1fb96138bacf..98ad196c1d235c7af2144b2744a6198e13e7342e 100644
--- a/ports/esp32/Makefile
+++ b/ports/esp32/Makefile
@@ -111,6 +111,7 @@ INC_ESPCOMP += -I$(ESPCOMP)/app_trace/include
INC_ESPCOMP += -I$(ESPCOMP)/app_update/include
INC_ESPCOMP += -I$(ESPCOMP)/pthread/include
INC_ESPCOMP += -I$(ESPCOMP)/smartconfig_ack/include
+INC_ESPCOMP += -I$(ESPCOMP)/sdmmc/include
# these flags are common to C and C++ compilation
CFLAGS_COMMON = -Os -ffunction-sections -fdata-sections -fstrict-volatile-bitfields \
@@ -192,6 +193,7 @@ SRC_C = \
machine_wdt.c \
mpthreadport.c \
machine_rtc.c \
+ machine_sdcard.c \
$(SRC_MOD)
EXTMOD_SRC_C = $(addprefix extmod/,\
@@ -257,6 +259,11 @@ ESPIDF_DRIVER_O = $(addprefix $(ESPCOMP)/driver/,\
ledc.o \
gpio.o \
timer.o \
+ sdmmc_host.o \
+ sdmmc_transaction.o \
+ sdspi_crc.o \
+ sdspi_host.o \
+ sdspi_transaction.o \
spi_master.o \
spi_common.o \
rtc_module.o \
@@ -329,6 +336,7 @@ ESPIDF_SOC_O = $(addprefix $(ESPCOMP)/soc/,\
esp32/rtc_sleep.o \
esp32/rtc_time.o \
esp32/rtc_wdt.o \
+ esp32/sdmmc_periph.o \
esp32/soc_memory_layout.o \
esp32/spi_periph.o \
src/memory_layout_utils.o \
@@ -665,6 +673,15 @@ ESPIDF_WPA_SUPPLICANT_O = $(addprefix $(ESPCOMP)/wpa_supplicant/,\
port/os_xtensa.o \
)
+ESPIDF_SDMMC_O = $(addprefix $(ESPCOMP)/sdmmc/,\
+ sdmmc_cmd.o \
+ sdmmc_common.o \
+ sdmmc_init.o \
+ sdmmc_mmc.o \
+ sdmmc_sd.o \
+ sdmmc_io.o \
+ )
+
OBJ_ESPIDF =
OBJ_ESPIDF += $(addprefix $(BUILD)/, $(ESPIDF_NEWLIB_O))
OBJ_ESPIDF += $(addprefix $(BUILD)/, $(ESPIDF_DRIVER_O))
@@ -693,6 +710,7 @@ OBJ_ESPIDF += $(addprefix $(BUILD)/, $(ESPIDF_SMARTCONFIG_ACK_O))
OBJ_ESPIDF += $(addprefix $(BUILD)/, $(ESPIDF_SPI_FLASH_O))
OBJ_ESPIDF += $(addprefix $(BUILD)/, $(ESPIDF_ULP_O))
OBJ_ESPIDF += $(addprefix $(BUILD)/, $(ESPIDF_WPA_SUPPLICANT_O))
+OBJ_ESPIDF += $(addprefix $(BUILD)/, $(ESPIDF_SDMMC_O))
$(OBJ_ESPIDF): $(SDKCONFIG_H)
@@ -723,6 +741,7 @@ LIB_ESPIDF += ulp
LIB_ESPIDF += lwip
LIB_ESPIDF += mbedtls
LIB_ESPIDF += wpa_supplicant
+LIB_ESPIDF += sdmmc
BUILD_ESPIDF_LIB = $(BUILD)/esp-idf
@@ -763,6 +782,7 @@ $(eval $(call gen_espidf_lib_rule,ulp,$(ESPIDF_ULP_O)))
$(eval $(call gen_espidf_lib_rule,lwip,$(ESPIDF_LWIP_O)))
$(eval $(call gen_espidf_lib_rule,mbedtls,$(ESPIDF_MBEDTLS_O)))
$(eval $(call gen_espidf_lib_rule,wpa_supplicant,$(ESPIDF_WPA_SUPPLICANT_O)))
+$(eval $(call gen_espidf_lib_rule,sdmmc,$(ESPIDF_SDMMC_O)))
LIB = $(foreach lib,$(LIB_ESPIDF),$(BUILD_ESPIDF_LIB)/$(lib)/lib$(lib).a)
diff --git a/ports/esp32/machine_sdcard.c b/ports/esp32/machine_sdcard.c
new file mode 100644
index 0000000000000000000000000000000000000000..633d4031d6ec1ca5cb2b40961a65988a7415f35f
--- /dev/null
+++ b/ports/esp32/machine_sdcard.c
@@ -0,0 +1,391 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Nicko van Someren
+ *
+ * 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.
+ */
+
+#include <string.h>
+
+#include "py/runtime.h"
+#include "py/mphal.h"
+#include "py/mperrno.h"
+#include "extmod/vfs_fat.h"
+
+#include "driver/sdmmc_host.h"
+#include "driver/sdspi_host.h"
+#include "sdmmc_cmd.h"
+#include "esp_log.h"
+
+#define DEBUG 0
+#if DEBUG
+#define DEBUG_printf(...) ESP_LOGI("modsdcard", __VA_ARGS__)
+#else
+#define DEBUG_printf(...) (void)0
+#endif
+
+//
+// There are three layers of abstraction: host, slot and card.
+// Creating an SD Card object will initialise the host and slot.
+// Cards gets initialised by ioctl op==1 and de-inited by ioctl 2
+// Hosts are de-inited in __del__. Slots do not need de-initing.
+//
+
+// Currently the ESP32 Library doesn't support MMC cards, so
+// we don't enable on MICROPY_HW_ENABLE_MMCARD.
+#if MICROPY_HW_ENABLE_SDCARD
+
+// Forward declaration
+const mp_obj_type_t machine_sdcard_type;
+
+typedef struct _sdcard_obj_t {
+ mp_obj_base_t base;
+ mp_int_t flags;
+ sdmmc_host_t host;
+ // The card structure duplicates the host. It's not clear if we
+ // can avoid this given the way that it is copied.
+ sdmmc_card_t card;
+} sdcard_card_obj_t;
+
+#define SDCARD_CARD_FLAGS_HOST_INIT_DONE 0x01
+#define SDCARD_CARD_FLAGS_CARD_INIT_DONE 0x02
+
+#define _SECTOR_SIZE(self) (self->card.csd.sector_size)
+
+STATIC esp_err_t check_esp_err(esp_err_t code) {
+ switch(code) {
+ case ESP_OK:
+ return ESP_OK;
+ case ESP_ERR_NO_MEM:
+ code = MP_ENOMEM;
+ break;
+ case ESP_ERR_TIMEOUT:
+ code = MP_ETIMEDOUT;
+ break;
+ case ESP_ERR_NOT_SUPPORTED:
+ code = MP_EOPNOTSUPP;
+ break;
+ }
+
+ mp_raise_OSError(code);
+}
+
+STATIC gpio_num_t pin_or_int(const mp_obj_t arg) {
+ if (mp_obj_is_small_int(arg)) {
+ return MP_OBJ_SMALL_INT_VALUE(arg);
+ } else {
+ // This raises a value error if the argument is not a Pin.
+ return machine_pin_get_id(arg);
+ }
+}
+
+#define SET_CONFIG_PIN(config, pin_var, arg_id) \
+ if (arg_vals[arg_id].u_obj != mp_const_none) \
+ config.pin_var = pin_or_int(arg_vals[arg_id].u_obj)
+
+STATIC esp_err_t sdcard_ensure_card_init(sdcard_card_obj_t *self, bool force) {
+ if (force || !(self->flags & SDCARD_CARD_FLAGS_CARD_INIT_DONE)) {
+ DEBUG_printf(" Calling card init");
+
+ esp_err_t err = sdmmc_card_init(&(self->host), &(self->card));
+ if (err == ESP_OK) {
+ self->flags |= SDCARD_CARD_FLAGS_CARD_INIT_DONE;
+ } else {
+ self->flags &= ~SDCARD_CARD_FLAGS_CARD_INIT_DONE;
+ }
+ DEBUG_printf(" Card init returned: %i", err);
+
+ return err;
+ } else {
+ return ESP_OK;
+ }
+}
+
+/******************************************************************************/
+// MicroPython bindings
+//
+// Expose the SD card or MMC as an object with the block protocol.
+
+// Create a new SDCard object
+// The driver supports either the host SD/MMC controller (default) or SPI mode
+// In both cases there are two "slots". Slot 0 on the SD/MMC controller is
+// typically tied up with the flash interface in most ESP32 modules but in
+// theory supports 1, 4 or 8-bit transfers. Slot 1 supports only 1 and 4-bit
+// transfers. Only 1-bit is supported on the SPI interfaces.
+// card = SDCard(slot=1, width=None, present_pin=None, wp_pin=None)
+
+STATIC mp_obj_t machine_sdcard_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
+ // check arguments
+ enum {
+ ARG_slot,
+ ARG_width,
+ ARG_cd,
+ ARG_wp,
+ ARG_miso,
+ ARG_mosi,
+ ARG_sck,
+ ARG_cs,
+ };
+ STATIC const mp_arg_t allowed_args[] = {
+ { MP_QSTR_slot, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
+ { MP_QSTR_width, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
+ { MP_QSTR_cd, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+ { MP_QSTR_wp, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+ // These are only needed if using SPI mode
+ { MP_QSTR_miso, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+ { MP_QSTR_mosi, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+ { MP_QSTR_sck, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+ { MP_QSTR_cs, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+ };
+ mp_arg_val_t arg_vals[MP_ARRAY_SIZE(allowed_args)];
+ mp_map_t kw_args;
+
+ DEBUG_printf("Making new SDCard:n");
+ DEBUG_printf(" Unpacking arguments");
+
+ mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
+
+ mp_arg_parse_all(n_args, args, &kw_args,
+ MP_ARRAY_SIZE(allowed_args), allowed_args, arg_vals);
+
+ DEBUG_printf(" slot=%d, width=%d, cd=%p, wp=%p",
+ arg_vals[ARG_slot].u_int, arg_vals[ARG_width].u_int,
+ arg_vals[ARG_cd].u_obj, arg_vals[ARG_wp].u_obj);
+
+ DEBUG_printf(" miso=%p, mosi=%p, sck=%p, cs=%p",
+ arg_vals[ARG_miso].u_obj, arg_vals[ARG_mosi].u_obj,
+ arg_vals[ARG_sck].u_obj, arg_vals[ARG_cs].u_obj);
+
+ int slot_num = arg_vals[ARG_slot].u_int;
+ if (slot_num < 0 || slot_num > 3) {
+ mp_raise_ValueError("Slot number must be between 0 and 3 inclusive");
+ }
+
+ // Slots 0 and 1 are native SD/MMC, slots 2 and 3 are SPI
+ bool is_spi = (slot_num >= 2);
+ if (is_spi) {
+ slot_num -= 2;
+ }
+
+ DEBUG_printf(" Setting up host configuration");
+
+ sdcard_card_obj_t *self = m_new_obj_with_finaliser(sdcard_card_obj_t);
+ self->base.type = &machine_sdcard_type;
+ self->flags = 0;
+ // Note that these defaults are macros that expand to structure
+ // constants so we can't directly assign them to fields.
+ if (is_spi) {
+ sdmmc_host_t _temp_host = SDSPI_HOST_DEFAULT();
+ self->host = _temp_host;
+ } else {
+ sdmmc_host_t _temp_host = SDMMC_HOST_DEFAULT();
+ self->host = _temp_host;
+ }
+
+ if (is_spi) {
+ self->host.slot = slot_num ? HSPI_HOST : VSPI_HOST;
+ slot_num -= 2;
+ }
+
+ DEBUG_printf(" Calling host.init()");
+
+ check_esp_err(self->host.init());
+ self->flags |= SDCARD_CARD_FLAGS_HOST_INIT_DONE;
+
+ if (is_spi) {
+ // SPI interface
+ STATIC const sdspi_slot_config_t slot_defaults[2] = {
+ {
+ .gpio_miso = GPIO_NUM_19,
+ .gpio_mosi = GPIO_NUM_23,
+ .gpio_sck = GPIO_NUM_18,
+ .gpio_cs = GPIO_NUM_5,
+ .gpio_cd = SDSPI_SLOT_NO_CD,
+ .gpio_wp = SDSPI_SLOT_NO_WP,
+ .dma_channel = 2
+ },
+ SDSPI_SLOT_CONFIG_DEFAULT() };
+
+ DEBUG_printf(" Setting up SPI slot configuration");
+ sdspi_slot_config_t slot_config = slot_defaults[slot_num];
+
+ SET_CONFIG_PIN(slot_config, gpio_cd, ARG_cd);
+ SET_CONFIG_PIN(slot_config, gpio_wp, ARG_wp);
+ SET_CONFIG_PIN(slot_config, gpio_miso, ARG_miso);
+ SET_CONFIG_PIN(slot_config, gpio_mosi, ARG_mosi);
+ SET_CONFIG_PIN(slot_config, gpio_sck, ARG_sck);
+ SET_CONFIG_PIN(slot_config, gpio_cs, ARG_cs);
+
+ DEBUG_printf(" Calling init_slot()");
+ check_esp_err(sdspi_host_init_slot(self->host.slot, &slot_config));
+ } else {
+ // SD/MMC interface
+ DEBUG_printf(" Setting up SDMMC slot configuration");
+ sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
+
+ // Stronger external pull-ups are still needed but apparently
+ // it is a good idea to set the internal pull-ups anyway.
+ // slot_config.flags = SDMMC_SLOT_FLAG_INTERNAL_PULLUP;
+
+ SET_CONFIG_PIN(slot_config, gpio_cd, ARG_cd);
+ SET_CONFIG_PIN(slot_config, gpio_wp, ARG_wp);
+
+ int width = arg_vals[ARG_width].u_int;
+ if (width == 1 || width == 4 || (width == 8 && slot_num == 0)) {
+ slot_config.width = width;
+ } else {
+ mp_raise_ValueError("Width must be 1 or 4 (or 8 on slot 0)");
+ }
+
+ DEBUG_printf(" Calling init_slot()");
+ check_esp_err(sdmmc_host_init_slot(self->host.slot, &slot_config));
+ }
+
+ DEBUG_printf(" Returning new card object: %p", self);
+ return MP_OBJ_FROM_PTR(self);
+}
+
+STATIC mp_obj_t sd_deinit(mp_obj_t self_in) {
+ sdcard_card_obj_t *self = self_in;
+
+ DEBUG_printf("De-init host\n");
+
+ if (self->flags & SDCARD_CARD_FLAGS_HOST_INIT_DONE) {
+ self->host.deinit();
+ self->flags &= ~SDCARD_CARD_FLAGS_HOST_INIT_DONE;
+ }
+
+ return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(sd_deinit_obj, sd_deinit);
+
+STATIC mp_obj_t sd_info(mp_obj_t self_in) {
+ sdcard_card_obj_t *self = self_in;
+ // We could potential return a great deal more SD card data but it
+ // is not clear that it is worth the extra code space to do
+ // so. For the most part people only care about the card size and
+ // block size.
+
+ check_esp_err(sdcard_ensure_card_init((sdcard_card_obj_t *) self, false));
+
+ uint32_t log_block_nbr = self->card.csd.capacity;
+ uint32_t log_block_size = _SECTOR_SIZE(self);
+
+ mp_obj_t tuple[2] = {
+ mp_obj_new_int_from_ull((uint64_t)log_block_nbr * (uint64_t)log_block_size),
+ mp_obj_new_int_from_uint(log_block_size),
+ };
+ return mp_obj_new_tuple(2, tuple);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(sd_info_obj, sd_info);
+
+STATIC mp_obj_t machine_sdcard_readblocks(mp_obj_t self_in, mp_obj_t block_num, mp_obj_t buf) {
+ sdcard_card_obj_t *self = self_in;
+ mp_buffer_info_t bufinfo;
+ esp_err_t err;
+
+ err = sdcard_ensure_card_init((sdcard_card_obj_t *) self, false);
+ if (err != ESP_OK) {
+ return false;
+ }
+
+ mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
+ err = sdmmc_read_sectors(&(self->card), bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / _SECTOR_SIZE(self) );
+
+ return mp_obj_new_bool(err == ESP_OK);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_3(machine_sdcard_readblocks_obj, machine_sdcard_readblocks);
+
+STATIC mp_obj_t machine_sdcard_writeblocks(mp_obj_t self_in, mp_obj_t block_num, mp_obj_t buf) {
+ sdcard_card_obj_t *self = self_in;
+ mp_buffer_info_t bufinfo;
+ esp_err_t err;
+
+ err = sdcard_ensure_card_init((sdcard_card_obj_t *) self, false);
+ if (err != ESP_OK) {
+ return false;
+ }
+
+ mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_READ);
+ err = sdmmc_write_sectors(&(self->card), bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / _SECTOR_SIZE(self) );
+
+ return mp_obj_new_bool(err == ESP_OK);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_3(machine_sdcard_writeblocks_obj, machine_sdcard_writeblocks);
+
+STATIC mp_obj_t machine_sdcard_ioctl(mp_obj_t self_in, mp_obj_t cmd_in, mp_obj_t arg_in) {
+ sdcard_card_obj_t *self = self_in;
+ esp_err_t err = ESP_OK;
+ mp_int_t cmd = mp_obj_get_int(cmd_in);
+
+ switch (cmd) {
+ case BP_IOCTL_INIT:
+ err = sdcard_ensure_card_init(self, false);
+ return MP_OBJ_NEW_SMALL_INT((err == ESP_OK) ? 0 : -1);
+
+ case BP_IOCTL_DEINIT:
+ // Ensure that future attempts to look at info re-read the card
+ self->flags &= ~SDCARD_CARD_FLAGS_CARD_INIT_DONE;
+ return MP_OBJ_NEW_SMALL_INT(0); // success
+
+ case BP_IOCTL_SYNC:
+ // nothing to do
+ return MP_OBJ_NEW_SMALL_INT(0); // success
+
+ case BP_IOCTL_SEC_COUNT:
+ err = sdcard_ensure_card_init(self, false);
+ if (err != ESP_OK)
+ return MP_OBJ_NEW_SMALL_INT(-1);
+ return MP_OBJ_NEW_SMALL_INT(self->card.csd.capacity);
+
+ case BP_IOCTL_SEC_SIZE:
+ err = sdcard_ensure_card_init(self, false);
+ if (err != ESP_OK)
+ return MP_OBJ_NEW_SMALL_INT(-1);
+ return MP_OBJ_NEW_SMALL_INT(_SECTOR_SIZE(self));
+
+ default: // unknown command
+ return MP_OBJ_NEW_SMALL_INT(-1); // error
+ }
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_3(machine_sdcard_ioctl_obj, machine_sdcard_ioctl);
+
+STATIC const mp_rom_map_elem_t machine_sdcard_locals_dict_table[] = {
+ { MP_ROM_QSTR(MP_QSTR_info), MP_ROM_PTR(&sd_info_obj) },
+ { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&sd_deinit_obj) },
+ { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&sd_deinit_obj) },
+ // block device protocol
+ { MP_ROM_QSTR(MP_QSTR_readblocks), MP_ROM_PTR(&machine_sdcard_readblocks_obj) },
+ { MP_ROM_QSTR(MP_QSTR_writeblocks), MP_ROM_PTR(&machine_sdcard_writeblocks_obj) },
+ { MP_ROM_QSTR(MP_QSTR_ioctl), MP_ROM_PTR(&machine_sdcard_ioctl_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(machine_sdcard_locals_dict, machine_sdcard_locals_dict_table);
+
+const mp_obj_type_t machine_sdcard_type = {
+ { &mp_type_type },
+ .name = MP_QSTR_SDCard,
+ .make_new = machine_sdcard_make_new,
+ .locals_dict = (mp_obj_dict_t*)&machine_sdcard_locals_dict,
+};
+
+#endif // MICROPY_HW_ENABLE_SDCARD
diff --git a/ports/esp32/modmachine.c b/ports/esp32/modmachine.c
index bc459ee5c29b27e13da20a78cf740fa2e3621be2..fb864947d229de15265076898a0ed3f9a9948e16 100644
--- a/ports/esp32/modmachine.c
+++ b/ports/esp32/modmachine.c
@@ -235,6 +235,9 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) },
{ MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&machine_wdt_type) },
+ #if MICROPY_HW_ENABLE_SDCARD
+ { MP_ROM_QSTR(MP_QSTR_SDCard), MP_ROM_PTR(&machine_sdcard_type) },
+ #endif
// wake abilities
{ MP_ROM_QSTR(MP_QSTR_SLEEP), MP_ROM_INT(MACHINE_WAKE_SLEEP) },
diff --git a/ports/esp32/modmachine.h b/ports/esp32/modmachine.h
index b65b427b4ea3372592edddf98578895aa99018f7..ca1776d8bf7214a9abb69cc5e8016434c4c5cf3c 100644
--- a/ports/esp32/modmachine.h
+++ b/ports/esp32/modmachine.h
@@ -19,6 +19,7 @@ extern const mp_obj_type_t machine_pwm_type;
extern const mp_obj_type_t machine_hw_spi_type;
extern const mp_obj_type_t machine_uart_type;
extern const mp_obj_type_t machine_rtc_type;
+extern const mp_obj_type_t machine_sdcard_type;
void machine_pins_init(void);
void machine_pins_deinit(void);
diff --git a/ports/esp32/mpconfigport.h b/ports/esp32/mpconfigport.h
index 7b9b40025035a1ae6a72d0253cf7c493eaea8411..bd19c6bfbdb2dbbfa4c42941f239ada7c3c4758a 100644
--- a/ports/esp32/mpconfigport.h
+++ b/ports/esp32/mpconfigport.h
@@ -141,6 +141,7 @@
#define MICROPY_PY_MACHINE_SPI_MSB (0)
#define MICROPY_PY_MACHINE_SPI_LSB (1)
#define MICROPY_PY_MACHINE_SPI_MAKE_NEW machine_hw_spi_make_new
+#define MICROPY_HW_ENABLE_SDCARD (1)
#define MICROPY_HW_SOFTSPI_MIN_DELAY (0)
#define MICROPY_HW_SOFTSPI_MAX_BAUDRATE (ets_get_cpu_frequency() * 1000000 / 200) // roughly
#define MICROPY_PY_USSL (1)