180 lines
6.8 KiB
C
180 lines
6.8 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Daniel Campora
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mpconfig.h"
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#include MICROPY_HAL_H
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "inc/hw_types.h"
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#include "inc/hw_gpio.h"
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#include "inc/hw_ints.h"
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#include "inc/hw_memmap.h"
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#include "rom_map.h"
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#include "pin.h"
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#include "prcm.h"
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#include "gpio.h"
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#include "sdhost.h"
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#include "ff.h"
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#include "diskio.h"
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#include "sd_diskio.h"
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#include "pybsd.h"
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#include "mpexception.h"
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#include "pybsleep.h"
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#include "pybpin.h"
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#include "pins.h"
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/******************************************************************************
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DEFINE PRIVATE CONSTANTS
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******************************************************************************/
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#define PYBSD_FREQUENCY_HZ 15000000 // 15MHz
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/******************************************************************************
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DECLARE PUBLIC DATA
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******************************************************************************/
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pybsd_obj_t pybsd_obj;
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/******************************************************************************
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DECLARE PRIVATE DATA
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******************************************************************************/
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STATIC const mp_obj_t pyb_sd_def_pin[3] = {&pin_GP10, &pin_GP11, &pin_GP15};
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/******************************************************************************
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DECLARE PRIVATE FUNCTIONS
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******************************************************************************/
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STATIC void pyb_sd_hw_init (pybsd_obj_t *self);
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STATIC mp_obj_t pyb_sd_make_new (mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args);
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STATIC mp_obj_t pyb_sd_deinit (mp_obj_t self_in);
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/******************************************************************************
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DEFINE PRIVATE FUNCTIONS
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******************************************************************************/
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/// Initalizes the sd card hardware driver
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STATIC void pyb_sd_hw_init (pybsd_obj_t *self) {
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if (self->pin_clk) {
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// Configure the clock pin as output only
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MAP_PinDirModeSet(((pin_obj_t *)(self->pin_clk))->pin_num, PIN_DIR_MODE_OUT);
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}
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// Enable SD peripheral clock
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MAP_PRCMPeripheralClkEnable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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// Reset MMCHS
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MAP_PRCMPeripheralReset(PRCM_SDHOST);
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// Initialize MMCHS
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MAP_SDHostInit(SDHOST_BASE);
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// Configure the card clock
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MAP_SDHostSetExpClk(SDHOST_BASE, MAP_PRCMPeripheralClockGet(PRCM_SDHOST), PYBSD_FREQUENCY_HZ);
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// Set card rd/wr block len
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MAP_SDHostBlockSizeSet(SDHOST_BASE, SD_SECTOR_SIZE);
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self->enabled = true;
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}
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STATIC mp_obj_t pyb_sd_init_helper (pybsd_obj_t *self, const mp_arg_val_t *args) {
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// assign the pins
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mp_obj_t pins_o = args[0].u_obj;
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if (pins_o != mp_const_none) {
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mp_obj_t *pins;
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if (pins_o == MP_OBJ_NULL) {
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// use the default pins
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pins = (mp_obj_t *)pyb_sd_def_pin;
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} else {
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mp_obj_get_array_fixed_n(pins_o, MP_ARRAY_SIZE(pyb_sd_def_pin), &pins);
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}
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pin_assign_pins_af (pins, MP_ARRAY_SIZE(pyb_sd_def_pin), PIN_TYPE_STD_PU, PIN_FN_SD, 0);
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// save the pins clock
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self->pin_clk = pin_find(pins[0]);
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}
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pyb_sd_hw_init (self);
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if (sd_disk_init() != 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_operation_failed));
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}
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// register it with the sleep module
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pyb_sleep_add ((const mp_obj_t)self, (WakeUpCB_t)pyb_sd_hw_init);
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return mp_const_none;
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}
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/******************************************************************************/
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// Micro Python bindings
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//
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STATIC const mp_arg_t pyb_sd_init_args[] = {
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{ MP_QSTR_id, MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_pins, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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};
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STATIC mp_obj_t pyb_sd_make_new (mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *all_args) {
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// parse args
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw, all_args + n_args);
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mp_arg_val_t args[MP_ARRAY_SIZE(pyb_sd_init_args)];
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mp_arg_parse_all(n_args, all_args, &kw_args, MP_ARRAY_SIZE(args), pyb_sd_init_args, args);
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// check the peripheral id
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if (args[0].u_int != 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_resource_not_avaliable));
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}
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// setup and initialize the object
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mp_obj_t self = &pybsd_obj;
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pybsd_obj.base.type = &pyb_sd_type;
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pyb_sd_init_helper (self, &args[1]);
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return self;
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}
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STATIC mp_obj_t pyb_sd_init (mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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// parse args
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mp_arg_val_t args[MP_ARRAY_SIZE(pyb_sd_init_args) - 1];
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mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), &pyb_sd_init_args[1], args);
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return pyb_sd_init_helper(pos_args[0], args);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_sd_init_obj, 1, pyb_sd_init);
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STATIC mp_obj_t pyb_sd_deinit (mp_obj_t self_in) {
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pybsd_obj_t *self = self_in;
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// disable the peripheral
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self->enabled = false;
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MAP_PRCMPeripheralClkDisable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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// de-initialze the sd card at diskio level
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sd_disk_deinit();
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// unregister it from the sleep module
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pyb_sleep_remove (self);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_sd_deinit_obj, pyb_sd_deinit);
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STATIC const mp_map_elem_t pyb_sd_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&pyb_sd_init_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&pyb_sd_deinit_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(pyb_sd_locals_dict, pyb_sd_locals_dict_table);
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const mp_obj_type_t pyb_sd_type = {
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{ &mp_type_type },
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.name = MP_QSTR_SD,
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.make_new = pyb_sd_make_new,
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.locals_dict = (mp_obj_t)&pyb_sd_locals_dict,
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};
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