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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* 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 "mpconfig.h"
#include MICROPY_HAL_H
#include "nlr.h"
#include "misc.h"
#include "qstr.h"
#include "obj.h"
#include "runtime.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "rom_map.h"
#include "pin.h"
#include "prcm.h"
#include "gpio.h"
#include "sdhost.h"
#include "pybpin.h"
#include "pybsd.h"
#include "ff.h"
#include "osi.h"
#include "debug.h"
#include "mpexception.h"
#if MICROPY_HW_HAS_SDCARD
#define PYBSD_FREQUENCY_HZ 15000000 // 15MHz
static byte pybsd_pin_d0, pybsd_pin_clk, pybsd_pin_cmd;
static byte pybsd_af_d0, pybsd_af_clk, pybsd_af_cmd;
static const pin_obj_t *pybsd_pin_sd_detect;
static bool pybsd_pin_config_set;
static bool pybsd_is_enabled;
static FATFS *sd_fatfs;
void pybsd_init0 (void) {
// Allocate memory for the sd file system
ASSERT ((sd_fatfs = mem_Malloc(sizeof(FATFS))) != NULL);
}
bool pybsd_is_present(void) {
if (pybsd_pin_sd_detect) {
return pybsd_is_enabled && MAP_GPIOPinRead(pybsd_pin_sd_detect->port, pybsd_pin_sd_detect->bit);
}
return true;
}
/******************************************************************************/
// Micro Python bindings
//
// Note: these function are a bit ad-hoc at the moment and are mainly intended
// for testing purposes. In the future SD should be a proper class with a
// consistent interface and methods to mount/unmount it.
/// \method sd_config([value])
/// Configure the pins used for the sd card.
/// May receive 6 or 7 arguments. The 7th optional argument is the card detect pin.
/// this pin needs no external pull-up and must be low when the sdcard is inserted.
///
/// Usage:
///
/// pyb.SDcard.config_pins (d0_pin, d0_af, clk_pin, clk_af, cmd_pin, cmd_af)
///
/// or:
///
/// pyb.SDcard.sd_config_pins (d0_pin, d0_af, clk_pin, clk_af, cmd_pin, cmd_af, card_detect_pin)
///
STATIC mp_obj_t pybsd_config (mp_uint_t n_args, const mp_obj_t *args) {
const pin_obj_t *pin = NULL;
pin = pin_find(args[1]);
pybsd_pin_d0 = pin->pin_num;
pybsd_af_d0 = mp_obj_get_int(args[2]);
pin_verify_af (pybsd_af_d0);
pin = pin_find(args[3]);
pybsd_pin_clk = pin->pin_num;
pybsd_af_clk = mp_obj_get_int(args[4]);
pin_verify_af (pybsd_af_clk);
pin = pin_find(args[5]);
pybsd_pin_cmd = pin->pin_num;
pybsd_af_cmd = mp_obj_get_int(args[6]);
pin_verify_af (pybsd_af_cmd);
if (n_args == 8) {
pybsd_pin_sd_detect = pin_find(args[7]);
}
pybsd_pin_config_set = true;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pybsd_config_obj, 7, 8, pybsd_config);
STATIC mp_obj_t pybsd_enable(mp_obj_t self) {
if (pybsd_pin_config_set) {
// Configure the D0 pin
MAP_PinTypeSDHost(pybsd_pin_d0, pybsd_af_d0);
// Configure the CLK pin
MAP_PinTypeSDHost(pybsd_pin_clk, pybsd_af_clk);
// Configure the CMD pin
MAP_PinTypeSDHost(pybsd_pin_cmd, pybsd_af_cmd);
// Set the SD card clock as an output pin
MAP_PinDirModeSet(pybsd_pin_clk, PIN_DIR_MODE_OUT);
// Enable SD peripheral clock
MAP_PRCMPeripheralClkEnable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// Reset MMCHS
MAP_PRCMPeripheralReset(PRCM_SDHOST);
// Initialize MMCHS
MAP_SDHostInit(SDHOST_BASE);
// Configure the card clock
MAP_SDHostSetExpClk(SDHOST_BASE, MAP_PRCMPeripheralClockGet(PRCM_SDHOST), PYBSD_FREQUENCY_HZ);
// Configure the card detect pin (if available)
if (pybsd_pin_sd_detect) {
pin_config(pybsd_pin_sd_detect, PIN_MODE_0, GPIO_DIR_MODE_IN, PIN_TYPE_STD_PU, PIN_STRENGTH_4MA);
}
}
else {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_resource_not_avaliable));
}
// try to mount the sd card on /SD
if (FR_OK == f_mount(sd_fatfs, "/SD", 1)) {
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_SD));
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_SD_slash_LIB));
}
pybsd_is_enabled = true;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pybsd_enable_obj, pybsd_enable);
STATIC mp_obj_t pybsd_disable(mp_obj_t self) {
if (pybsd_is_enabled) {
pybsd_is_enabled = false;
// unmount the sd card
f_mount (NULL, "/SD", 1);
// disable the peripheral
MAP_PRCMPeripheralClkDisable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pybsd_disable_obj, pybsd_disable);
STATIC const mp_map_elem_t pybsd_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_config), (mp_obj_t)&pybsd_config_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_enable), (mp_obj_t)&pybsd_enable_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_disable), (mp_obj_t)&pybsd_disable_obj },
};
STATIC MP_DEFINE_CONST_DICT(pybsd_locals_dict, pybsd_locals_dict_table);
static const mp_obj_type_t sdcard_type = {
{ &mp_type_type },
.name = MP_QSTR_SD,
.locals_dict = (mp_obj_t)&pybsd_locals_dict,
};
const mp_obj_base_t pyb_sdcard_obj = {&sdcard_type};
#endif // MICROPY_HW_HAS_SDCARD
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