basic.cpp

00001 /*
00002  * mbed Microcontroller Library
00003  * Copyright (c) 2006-2016 ARM Limited
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  *
00017  */
00018 
00019 /* The following copyright notice is reproduced from the glibc project
00020  * REF_LICENCE_GLIBC
00021  *
00022  * Copyright (C) 1991, 1992 Free Software Foundation, Inc.
00023  * This file is part of the GNU C Library.
00024  *
00025  * The GNU C Library is free software; you can redistribute it and/or
00026  * modify it under the terms of the GNU Library General Public License as
00027  * published by the Free Software Foundation; either version 2 of the
00028  * License, or (at your option) any later version.
00029  *
00030  * The GNU C Library is distributed in the hope that it will be useful,
00031  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00032  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00033  * Library General Public License for more details.
00034  *
00035  * You should have received a copy of the GNU Library General Public
00036  * License along with the GNU C Library; see the file COPYING.LIB.  If
00037  * not, write to the Free Software Foundation, Inc., 675 Mass Ave,
00038  * Cambridge, MA 02139, USA.
00039  */
00040 
00041 
00042 /** @file main.cpp Basic SD Driver Test
00043  */
00044 #include "mbed.h"
00045 #include "greentea-client/test_env.h"
00046 #include "unity.h"
00047 #include "utest.h"
00048 
00049 #include "SDBlockDevice.h"
00050 #include <stdlib.h>
00051 
00052 using namespace utest::v1;
00053 
00054 #define TEST_BLOCK_COUNT        10
00055 #define TEST_ERROR_MASK         16
00056 #define TEST_BLOCK_SIZE         2048
00057 
00058 const struct {
00059     const char *name;
00060     bd_size_t (BlockDevice::*method)() const;
00061 } ATTRS[] = {
00062     {"read size",    &BlockDevice::get_read_size},
00063     {"program size", &BlockDevice::get_program_size},
00064     {"erase size",   &BlockDevice::get_erase_size},
00065     {"total size",   &BlockDevice::size},
00066 };
00067 
00068 void test_read_write() {
00069     SDBlockDevice sd(MBED_CONF_SD_SPI_MOSI, MBED_CONF_SD_SPI_MISO, MBED_CONF_SD_SPI_CLK, MBED_CONF_SD_SPI_CS);
00070 
00071     int err = sd.init();
00072     TEST_ASSERT_EQUAL(0, err);
00073 
00074     err = sd.frequency(25000000);
00075     TEST_ASSERT_EQUAL(0, err);
00076 
00077     for (unsigned a = 0; a < sizeof(ATTRS)/sizeof(ATTRS[0]); a++) {
00078         static const char *prefixes[] = {"", "k", "M", "G"};
00079         for (int i = 3; i >= 0; i--) {
00080             bd_size_t size = (sd.*ATTRS[a].method)();
00081             if (size >= (1ULL << 10*i)) {
00082                 printf("%s: %llu%sbytes (%llubytes)\n",
00083                     ATTRS[a].name, size >> 10*i, prefixes[i], size);
00084                 break;
00085             }
00086         }
00087     }
00088 
00089     bd_size_t erase_size = sd.get_erase_size();
00090     bd_size_t block_size = erase_size > TEST_BLOCK_SIZE ? erase_size : TEST_BLOCK_SIZE;
00091 
00092     uint8_t *write_block = new uint8_t[block_size];
00093     uint8_t *read_block = new uint8_t[block_size];
00094     uint8_t *error_mask = new uint8_t[TEST_ERROR_MASK];
00095     unsigned addrwidth = ceil(log(float(sd.size()-1)) / log(float(16)))+1;
00096 
00097     for (int b = 0; b < TEST_BLOCK_COUNT; b++) {
00098         // Find a random block
00099         bd_addr_t block = (rand()*block_size) % sd.size();
00100 
00101         // Use next random number as temporary seed to keep
00102         // the address progressing in the pseudorandom sequence
00103         unsigned seed = rand();
00104 
00105         // Fill with random sequence
00106         srand(seed);
00107         for (bd_size_t i = 0; i < block_size; i++) {
00108             write_block[i] = 0xff & rand();
00109         }
00110 
00111         // Write, sync, and read the block
00112         printf("test  %0*llx:%llu...\n", addrwidth, block, block_size);
00113 
00114         err = sd.erase(block, block_size);
00115         TEST_ASSERT_EQUAL(0, err);
00116 
00117         err = sd.program(write_block, block, block_size);
00118         TEST_ASSERT_EQUAL(0, err);
00119 
00120         printf("write %0*llx:%llu ", addrwidth, block, block_size);
00121         for (int i = 0; i < 16; i++) {
00122             printf("%02x", write_block[i]);
00123         }
00124         printf("...\n");
00125 
00126         err = sd.read(read_block, block, block_size);
00127         TEST_ASSERT_EQUAL(0, err);
00128 
00129         printf("read  %0*llx:%llu ", addrwidth, block, block_size);
00130         for (int i = 0; i < 16; i++) {
00131             printf("%02x", read_block[i]);
00132         }
00133         printf("...\n");
00134 
00135         // Find error mask for debugging
00136         memset(error_mask, 0, TEST_ERROR_MASK);
00137         bd_size_t error_scale = block_size / (TEST_ERROR_MASK*8);
00138 
00139         srand(seed);
00140         for (bd_size_t i = 0; i < TEST_ERROR_MASK*8; i++) {
00141             for (bd_size_t j = 0; j < error_scale; j++) {
00142                 if ((0xff & rand()) != read_block[i*error_scale + j]) {
00143                     error_mask[i/8] |= 1 << (i%8);
00144                 }
00145             }
00146         }
00147 
00148         printf("error %0*llx:%llu ", addrwidth, block, block_size);
00149         for (int i = 0; i < 16; i++) {
00150             printf("%02x", error_mask[i]);
00151         }
00152         printf("\n");
00153 
00154         // Check that the data was unmodified
00155         srand(seed);
00156         for (bd_size_t i = 0; i < block_size; i++) {
00157             TEST_ASSERT_EQUAL(0xff & rand(), read_block[i]);
00158         }
00159     }
00160 
00161     err = sd.deinit();
00162     TEST_ASSERT_EQUAL(0, err);
00163 }
00164 
00165 // Test setup
00166 utest::v1::status_t test_setup(const size_t number_of_cases) {
00167     GREENTEA_SETUP(120, "default_auto");
00168     return verbose_test_setup_handler(number_of_cases);
00169 }
00170 
00171 Case cases[] = {
00172     Case("Testing read write random blocks", test_read_write),
00173 };
00174 
00175 Specification specification(test_setup, cases);
00176 
00177 int main() {
00178     return !Harness::run(specification);
00179 }