Jingtian Dang / Mbed 2 deprecated SDspimaster_HelloWorld_

spimaster

Dependencies:   mbed SDFileSystem

SDspimaster.cpp@2:6d633bb5c09d, 2021-12-05 (annotated)

Committer:
yutation
Date:
Sun Dec 05 03:05:32 2021 +0000
Revision:
2:6d633bb5c09d
Child:
3:4c39249bcd56
Spimaster;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yutation 2:6d633bb5c09d 1 #include "SDspimaster.h"
yutation 2:6d633bb5c09d 2 #include "mbed_debug.h"
yutation 2:6d633bb5c09d 3
yutation 2:6d633bb5c09d 4 // Register Address
yutation 2:6d633bb5c09d 5 const uint8_t TRANS_TYPE_REG = 0x2;
yutation 2:6d633bb5c09d 6 const uint8_t TRANS_CTRL_REG =0x3;
yutation 2:6d633bb5c09d 7 const uint8_t TRANS_STS_REG =0x4;
yutation 2:6d633bb5c09d 8 const uint8_t TRANS_ERROR_REG =0x5;
yutation 2:6d633bb5c09d 9 const uint8_t RX_FIFO_DATA_REG =0x10;
yutation 2:6d633bb5c09d 10 const uint8_t TX_FIFO_DATA_REG =0x20;
yutation 2:6d633bb5c09d 11 const uint8_t ADDR_7_0_REG =0x7;
yutation 2:6d633bb5c09d 12 const uint8_t ADDR_15_8_REG =0x8;
yutation 2:6d633bb5c09d 13 const uint8_t ADDR_23_16_REG =0x9;
yutation 2:6d633bb5c09d 14 const uint8_t ADDR_31_24_REG =0xa;
yutation 2:6d633bb5c09d 15
yutation 2:6d633bb5c09d 16
yutation 2:6d633bb5c09d 17
yutation 2:6d633bb5c09d 18 // Reg Value states
yutation 2:6d633bb5c09d 19 // TRANS_TYPE_REG
yutation 2:6d633bb5c09d 20 const uint8_t DIRECT_ACCESS =0;
yutation 2:6d633bb5c09d 21 const uint8_t INIT_SD =1;
yutation 2:6d633bb5c09d 22 const uint8_t READ_SD_BLOCK =2;
yutation 2:6d633bb5c09d 23 const uint8_t WRITE_SD_BLOCK =3;
yutation 2:6d633bb5c09d 24
yutation 2:6d633bb5c09d 25 //TRANS_CTRL_REG
yutation 2:6d633bb5c09d 26 const uint8_t TRANS_START =1;
yutation 2:6d633bb5c09d 27
yutation 2:6d633bb5c09d 28 //TRANS_STS_REG
yutation 2:6d633bb5c09d 29 const uint8_t TRANS_BUSY =1;
yutation 2:6d633bb5c09d 30
yutation 2:6d633bb5c09d 31 //TRANS_ERROR_REG
yutation 2:6d633bb5c09d 32 const uint8_t NO_ERROR =0;
yutation 2:6d633bb5c09d 33
yutation 2:6d633bb5c09d 34 //the variable below should be replaced by a specific pin
yutation 2:6d633bb5c09d 35 // the name is the same as the data sheet of spimaster
yutation 2:6d633bb5c09d 36
yutation 2:6d633bb5c09d 37 uint8_t clk_i;
yutation 2:6d633bb5c09d 38 uint8_t address_i;
yutation 2:6d633bb5c09d 39 uint8_t data_i;
yutation 2:6d633bb5c09d 40 uint8_t data_o;
yutation 2:6d633bb5c09d 41 uint8_t write_en;
yutation 2:6d633bb5c09d 42 uint8_t rst_i;
yutation 2:6d633bb5c09d 43
yutation 2:6d633bb5c09d 44
yutation 2:6d633bb5c09d 45
yutation 2:6d633bb5c09d 46 SDspimaster::SDspimaster(const char* name) :
yutation 2:6d633bb5c09d 47 FATFileSystem(name), _is_initialized(0) {
yutation 2:6d633bb5c09d 48 rst_i = 1;
yutation 2:6d633bb5c09d 49 rst_i = 0;
yutation 2:6d633bb5c09d 50
yutation 2:6d633bb5c09d 51 }
yutation 2:6d633bb5c09d 52
yutation 2:6d633bb5c09d 53 void read_reg(uint8_t addr, uint8_t* value){
yutation 2:6d633bb5c09d 54 clk_i = 1;
yutation 2:6d633bb5c09d 55 write_en = 0;
yutation 2:6d633bb5c09d 56 address_i = addr;
yutation 2:6d633bb5c09d 57 clk_i = 0;
yutation 2:6d633bb5c09d 58 *value = data_o;
yutation 2:6d633bb5c09d 59
yutation 2:6d633bb5c09d 60 }
yutation 2:6d633bb5c09d 61
yutation 2:6d633bb5c09d 62 void write_reg(uint8_t addr, uint8_t value){
yutation 2:6d633bb5c09d 63 clk_i = 1;
yutation 2:6d633bb5c09d 64 address_i = addr;
yutation 2:6d633bb5c09d 65 data_i = value;
yutation 2:6d633bb5c09d 66 write_en = 1;
yutation 2:6d633bb5c09d 67 clk_i = 0;
yutation 2:6d633bb5c09d 68
yutation 2:6d633bb5c09d 69 }
yutation 2:6d633bb5c09d 70
yutation 2:6d633bb5c09d 71 void write_address(uint32_t addr) {
yutation 2:6d633bb5c09d 72 write_reg(ADDR_7_0_REG, (addr >> 0) & 0xff);
yutation 2:6d633bb5c09d 73 write_reg(ADDR_15_8_REG, (addr >> 8) & 0xff);
yutation 2:6d633bb5c09d 74 write_reg(ADDR_23_16_REG, (addr >> 16) & 0xff);
yutation 2:6d633bb5c09d 75 write_reg(ADDR_31_24_REG, (addr >> 25) & 0xff);
yutation 2:6d633bb5c09d 76 }
yutation 2:6d633bb5c09d 77
yutation 2:6d633bb5c09d 78 int write_block(uint32_t addr, const uint8_t* buffer) {
yutation 2:6d633bb5c09d 79 uint8_t state;
yutation 2:6d633bb5c09d 80 for(uint32_t i = 0; i <= 512; i++) {
yutation 2:6d633bb5c09d 81 write_reg(TX_FIFO_DATA_REG, buffer[i]);
yutation 2:6d633bb5c09d 82 }
yutation 2:6d633bb5c09d 83 write_address(addr);
yutation 2:6d633bb5c09d 84 write_reg( TRANS_TYPE_REG, WRITE_SD_BLOCK);
yutation 2:6d633bb5c09d 85 write_reg(TRANS_CTRL_REG, TRANS_START);
yutation 2:6d633bb5c09d 86 read_reg(TRANS_STS_REG, &state);
yutation 2:6d633bb5c09d 87 while(state == TRANS_BUSY)
yutation 2:6d633bb5c09d 88 read_reg(TRANS_STS_REG, &state);
yutation 2:6d633bb5c09d 89 read_reg(TRANS_ERROR_REG,&state);
yutation 2:6d633bb5c09d 90
yutation 2:6d633bb5c09d 91 if((state>>4) & 0x3 != NO_ERROR)
yutation 2:6d633bb5c09d 92 return 1;
yutation 2:6d633bb5c09d 93
yutation 2:6d633bb5c09d 94 return 0;
yutation 2:6d633bb5c09d 95 }
yutation 2:6d633bb5c09d 96
yutation 2:6d633bb5c09d 97 int read_block(uint32_t addr, uint8_t* buffer) {
yutation 2:6d633bb5c09d 98 uint8_t state;
yutation 2:6d633bb5c09d 99 write_address(addr);
yutation 2:6d633bb5c09d 100 write_reg( TRANS_TYPE_REG, READ_SD_BLOCK);
yutation 2:6d633bb5c09d 101 write_reg(TRANS_CTRL_REG, TRANS_START);
yutation 2:6d633bb5c09d 102 read_reg(TRANS_STS_REG, &state);
yutation 2:6d633bb5c09d 103 while(state == TRANS_BUSY)
yutation 2:6d633bb5c09d 104 read_reg(TRANS_STS_REG, &state);
yutation 2:6d633bb5c09d 105 read_reg(TRANS_ERROR_REG,&state);
yutation 2:6d633bb5c09d 106 if((state>>2) & 0x3 != NO_ERROR)
yutation 2:6d633bb5c09d 107 return 1;
yutation 2:6d633bb5c09d 108
yutation 2:6d633bb5c09d 109 for(uint32_t i = 0; i <= 512; i++) {
yutation 2:6d633bb5c09d 110 read_reg(RX_FIFO_DATA_REG, &buffer[i]);
yutation 2:6d633bb5c09d 111 }
yutation 2:6d633bb5c09d 112
yutation 2:6d633bb5c09d 113
yutation 2:6d633bb5c09d 114 return 0;
yutation 2:6d633bb5c09d 115 }
yutation 2:6d633bb5c09d 116
yutation 2:6d633bb5c09d 117 int SDspimaster::disk_initialize() {
yutation 2:6d633bb5c09d 118 uint8_t state;
yutation 2:6d633bb5c09d 119 write_reg( TRANS_TYPE_REG, INIT_SD);
yutation 2:6d633bb5c09d 120 write_reg(TRANS_CTRL_REG, TRANS_START);
yutation 2:6d633bb5c09d 121 read_reg(TRANS_STS_REG, &state);
yutation 2:6d633bb5c09d 122 while(state == TRANS_BUSY)
yutation 2:6d633bb5c09d 123 read_reg(TRANS_STS_REG, &state);
yutation 2:6d633bb5c09d 124 read_reg(TRANS_ERROR_REG,&state);
yutation 2:6d633bb5c09d 125
yutation 2:6d633bb5c09d 126 if(state & 0x3 != NO_ERROR)
yutation 2:6d633bb5c09d 127 return 1;
yutation 2:6d633bb5c09d 128
yutation 2:6d633bb5c09d 129 _is_initialized = 1;
yutation 2:6d633bb5c09d 130 return 0;
yutation 2:6d633bb5c09d 131 }
yutation 2:6d633bb5c09d 132
yutation 2:6d633bb5c09d 133 int SDspimaster::disk_status() {
yutation 2:6d633bb5c09d 134 //returns 0 when initialized
yutation 2:6d633bb5c09d 135 if (_is_initialized) {
yutation 2:6d633bb5c09d 136 return 0;
yutation 2:6d633bb5c09d 137 } else {
yutation 2:6d633bb5c09d 138 return 1;
yutation 2:6d633bb5c09d 139 }
yutation 2:6d633bb5c09d 140 }
yutation 2:6d633bb5c09d 141
yutation 2:6d633bb5c09d 142 int SDspimaster::disk_write(const uint8_t* buffer, uint32_t block_number, uint32_t count) {
yutation 2:6d633bb5c09d 143 if (!_is_initialized) {
yutation 2:6d633bb5c09d 144 return -1;
yutation 2:6d633bb5c09d 145 }
yutation 2:6d633bb5c09d 146
yutation 2:6d633bb5c09d 147 for (uint32_t b = block_number; b < block_number + count; b++) {
yutation 2:6d633bb5c09d 148 // set write address for single block (CMD24)
yutation 2:6d633bb5c09d 149
yutation 2:6d633bb5c09d 150 if (write_block(b, buffer) != 0) {
yutation 2:6d633bb5c09d 151 return 1;
yutation 2:6d633bb5c09d 152 }
yutation 2:6d633bb5c09d 153
yutation 2:6d633bb5c09d 154 // send the data block
yutation 2:6d633bb5c09d 155 buffer += 512;
yutation 2:6d633bb5c09d 156 }
yutation 2:6d633bb5c09d 157
yutation 2:6d633bb5c09d 158 return 0;
yutation 2:6d633bb5c09d 159 }
yutation 2:6d633bb5c09d 160
yutation 2:6d633bb5c09d 161 int SDspimaster::disk_read(uint8_t* buffer, uint32_t block_number, uint32_t count) {
yutation 2:6d633bb5c09d 162 if (!_is_initialized) {
yutation 2:6d633bb5c09d 163 return -1;
yutation 2:6d633bb5c09d 164 }
yutation 2:6d633bb5c09d 165
yutation 2:6d633bb5c09d 166 for (uint32_t b = block_number; b < block_number + count; b++) {
yutation 2:6d633bb5c09d 167 // set write address for single block (CMD24)
yutation 2:6d633bb5c09d 168
yutation 2:6d633bb5c09d 169
yutation 2:6d633bb5c09d 170 if (read_block(b, buffer) != 0) {
yutation 2:6d633bb5c09d 171 return 1;
yutation 2:6d633bb5c09d 172 }
yutation 2:6d633bb5c09d 173
yutation 2:6d633bb5c09d 174 // send the data block
yutation 2:6d633bb5c09d 175 buffer += 512;
yutation 2:6d633bb5c09d 176 }
yutation 2:6d633bb5c09d 177
yutation 2:6d633bb5c09d 178 return 0;
yutation 2:6d633bb5c09d 179 }
yutation 2:6d633bb5c09d 180
yutation 2:6d633bb5c09d 181 int SDspimaster::disk_sync() { return 0; }
yutation 2:6d633bb5c09d 182
yutation 2:6d633bb5c09d 183 // Not implement right
yutation 2:6d633bb5c09d 184 uint32_t SDspimaster::disk_sectors() { return -1; }
yutation 2:6d633bb5c09d 185
yutation 2:6d633bb5c09d 186
yutation 2:6d633bb5c09d 187
yutation 2:6d633bb5c09d 188
yutation 2:6d633bb5c09d 189
yutation 2:6d633bb5c09d 190
yutation 2:6d633bb5c09d 191
yutation 2:6d633bb5c09d 192