221 lines
7.7 KiB
C
221 lines
7.7 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 "pybpin.h"
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#include "pybsd.h"
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#include "ff.h"
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#include "simplelink.h"
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#include "debug.h"
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#include "mpexception.h"
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#if MICROPY_HW_HAS_SDCARD
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#define PYBSD_FREQUENCY_HZ 15000000 // 15MHz
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typedef struct {
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mp_obj_base_t base;
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FATFS *fatfs;
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pin_obj_t *pin_d0;
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pin_obj_t *pin_clk;
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pin_obj_t *pin_cmd;
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pin_obj_t *pin_sd_detect;
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byte af_d0;
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byte af_clk;
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byte af_cmd;
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bool pinsset;
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bool enabled;
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bool inpath;
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} pybsd_obj_t;
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/******************************************************************************
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DECLARE PRIVATE DATA
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******************************************************************************/
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STATIC pybsd_obj_t pybsd_obj;
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/******************************************************************************
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DECLARE PRIVATE FUNCTIONS
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******************************************************************************/
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STATIC mp_obj_t pybsd_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 pybsd_disable (mp_obj_t self_in);
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STATIC mp_obj_t pybsd_enable (mp_obj_t self_in);
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/******************************************************************************
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DECLARE PUBLIC FUNCTIONS
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******************************************************************************/
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void pybsd_init0 (void) {
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// allocate memory for the sd file system
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ASSERT ((pybsd_obj.fatfs = mem_Malloc(sizeof(FATFS))) != NULL);
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}
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bool pybsd_is_present(void) {
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if (pybsd_obj.pin_sd_detect) {
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return pybsd_obj.enabled && MAP_GPIOPinRead(pybsd_obj.pin_sd_detect->port, pybsd_obj.pin_sd_detect->bit);
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}
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return pybsd_obj.enabled;
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}
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void pybsd_deinit (void) {
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pybsd_disable ((mp_obj_t)&pybsd_obj);
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pybsd_obj.pin_sd_detect = NULL;
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}
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/******************************************************************************/
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// Micro Python bindings
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//
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/// \classmethod \constructor()
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/// Configure the pins used for the sd card.
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/// May receive 0, 6 or 7 arguments. The 7th optional argument is the card detect pin.
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/// this pin needs no external pull-up and must be low when the sdcard is inserted.
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///
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/// Usage:
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/// sd = pyb.SD()
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////
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/// sd = pyb.SD(d0_pin, d0_af, clk_pin, clk_af, cmd_pin, cmd_af)
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///
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/// and:
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///
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/// sd = pyb.SD(d0_pin, d0_af, clk_pin, clk_af, cmd_pin, cmd_af, card_detect_pin)
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///
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STATIC mp_obj_t pybsd_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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mp_arg_check_num(n_args, n_kw, 0, 7, false);
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if (n_args >= 6) {
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// get pins and afs
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pybsd_obj.pin_d0 = (pin_obj_t *)pin_find(args[0]);
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pybsd_obj.af_d0 = mp_obj_get_int(args[1]);
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pin_verify_af (pybsd_obj.af_d0);
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pybsd_obj.pin_clk = (pin_obj_t *)pin_find(args[2]);
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pybsd_obj.af_clk = mp_obj_get_int(args[3]);
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pin_verify_af (pybsd_obj.af_clk);
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pybsd_obj.pin_cmd = (pin_obj_t *)pin_find(args[4]);
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pybsd_obj.af_cmd = mp_obj_get_int(args[5]);
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pin_verify_af (pybsd_obj.af_cmd);
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// configure the sdhost pins
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MAP_PinTypeSDHost(pybsd_obj.pin_d0->pin_num, pybsd_obj.af_d0);
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MAP_PinTypeSDHost(pybsd_obj.pin_clk->pin_num, pybsd_obj.af_clk);
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MAP_PinDirModeSet(pybsd_obj.pin_clk->pin_num, PIN_DIR_MODE_OUT);
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MAP_PinTypeSDHost(pybsd_obj.pin_cmd->pin_num, pybsd_obj.af_cmd);
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// card detect pin was provided
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if (n_args == 7) {
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pybsd_obj.pin_sd_detect = (pin_obj_t *)pin_find(args[6]);
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pin_config (pybsd_obj.pin_sd_detect, PIN_MODE_0, GPIO_DIR_MODE_IN, PIN_TYPE_STD_PU, PIN_STRENGTH_4MA);
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}
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pybsd_obj.pinsset = true;
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}
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else if (n_args == 0) {
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if (!pybsd_obj.pinsset) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, mpexception_num_type_invalid_arguments));
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}
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}
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else {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, mpexception_num_type_invalid_arguments));
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}
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pybsd_obj.base.type = &pyb_sd_type;
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return &pybsd_obj;
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}
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/// \method enable()
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/// Enables the sd card and mounts the file system
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STATIC mp_obj_t pybsd_enable (mp_obj_t self_in) {
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pybsd_obj_t *self = self_in;
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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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self->enabled = true;
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// try to mount the sd card on /SD
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if (FR_OK != f_mount(self->fatfs, "/SD", 1)) {
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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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mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_SD));
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mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_SD_slash_LIB));
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self->inpath = true;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pybsd_enable_obj, pybsd_enable);
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/// \method disable()
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/// Disables the sd card and unmounts the file system
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STATIC mp_obj_t pybsd_disable (mp_obj_t self_in) {
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pybsd_obj_t *self = self_in;
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if (self->enabled) {
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self->enabled = false;
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// unmount the sd card
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f_mount (NULL, "/SD", 1);
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// remove sd paths from mp_sys_path
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if (self->inpath) {
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mp_obj_list_remove(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_SD));
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mp_obj_list_remove(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_SD_slash_LIB));
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self->inpath = false;
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}
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// disable the peripheral
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MAP_PRCMPeripheralClkDisable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pybsd_disable_obj, pybsd_disable);
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STATIC const mp_map_elem_t pybsd_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_enable), (mp_obj_t)&pybsd_enable_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_disable), (mp_obj_t)&pybsd_disable_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(pybsd_locals_dict, pybsd_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 = pybsd_make_new,
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.locals_dict = (mp_obj_t)&pybsd_locals_dict,
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};
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#endif // MICROPY_HW_HAS_SDCARD
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