SPI Flash AT45DBXXXD
Fork of at45db161d by
at45db161d.cpp@9:8b1cf34d290e, 2015-04-17 (annotated)
- Committer:
- LeoHsueh
- Date:
- Fri Apr 17 11:49:27 2015 +0000
- Revision:
- 9:8b1cf34d290e
- Parent:
- 8:1ec3997fe258
Fix inactive.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
okini3939 | 0:2e953bbaf3a5 | 1 | /** |
okini3939 | 0:2e953bbaf3a5 | 2 | * AT45DB161D module for arduino (C) Vincent |
okini3939 | 0:2e953bbaf3a5 | 3 | * SPI flash memory |
okini3939 | 0:2e953bbaf3a5 | 4 | * http://blog.blockos.org/?p=27 |
okini3939 | 0:2e953bbaf3a5 | 5 | * |
okini3939 | 0:2e953bbaf3a5 | 6 | * bug fix by todotani |
okini3939 | 0:2e953bbaf3a5 | 7 | * http://todotani.cocolog-nifty.com/blog/2009/07/arduino-4cf4.html |
okini3939 | 0:2e953bbaf3a5 | 8 | * |
okini3939 | 0:2e953bbaf3a5 | 9 | * Modified for mbed, 2011 Suga. |
okini3939 | 0:2e953bbaf3a5 | 10 | */ |
LeoHsueh |
6:1872f591d604 | 11 | |
okini3939 | 0:2e953bbaf3a5 | 12 | #include "at45db161d.h" |
LeoHsueh |
6:1872f591d604 | 13 | #include "at45db161d_commands.h" |
okini3939 | 0:2e953bbaf3a5 | 14 | |
LeoHsueh |
6:1872f591d604 | 15 | #define DF_CS_inactive _cs = 1 |
LeoHsueh |
6:1872f591d604 | 16 | #define DF_CS_active _cs = 0 |
LeoHsueh |
6:1872f591d604 | 17 | |
LeoHsueh |
6:1872f591d604 | 18 | ATD45DB161D::ATD45DB161D(SPI *spi, PinName cs) : |
LeoHsueh |
6:1872f591d604 | 19 | _spi(spi), _cs(cs) { |
LeoHsueh |
7:2f9d8b47704f | 20 | // pageSize = 264; |
LeoHsueh |
7:2f9d8b47704f | 21 | // pageLength = 4095; |
LeoHsueh |
6:1872f591d604 | 22 | /* Disable device */ |
LeoHsueh |
6:1872f591d604 | 23 | DF_CS_inactive; |
okini3939 | 0:2e953bbaf3a5 | 24 | |
okini3939 | 0:2e953bbaf3a5 | 25 | /* Setup SPI */ |
LeoHsueh |
5:ef7247c6f073 | 26 | _spi->format(8, 0); |
LeoHsueh |
5:ef7247c6f073 | 27 | _spi->frequency(10000000); |
LeoHsueh |
7:2f9d8b47704f | 28 | |
LeoHsueh |
7:2f9d8b47704f | 29 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
7:2f9d8b47704f | 30 | DF_CS_active; /* to reset Dataflash command decoder */ |
LeoHsueh |
7:2f9d8b47704f | 31 | |
LeoHsueh |
7:2f9d8b47704f | 32 | /* Send status read command */ |
LeoHsueh |
7:2f9d8b47704f | 33 | _spi->write(AT45DB161D_READ_MANUFACTURER_AND_DEVICE_ID); |
LeoHsueh |
7:2f9d8b47704f | 34 | |
LeoHsueh |
7:2f9d8b47704f | 35 | /* Manufacturer ID */ |
LeoHsueh |
7:2f9d8b47704f | 36 | _info.manufacturer = _spi->write(0xff); |
LeoHsueh |
7:2f9d8b47704f | 37 | /* Device ID (part 1) */ |
LeoHsueh |
7:2f9d8b47704f | 38 | _info.device[0] = _spi->write(0xff); |
LeoHsueh |
7:2f9d8b47704f | 39 | /* Device ID (part 2) */ |
LeoHsueh |
7:2f9d8b47704f | 40 | _info.device[1] = _spi->write(0xff); |
LeoHsueh |
7:2f9d8b47704f | 41 | /* Extended Device Information String Length */ |
LeoHsueh |
7:2f9d8b47704f | 42 | _info.extendedInfoLength = _spi->write(0xff); |
LeoHsueh |
7:2f9d8b47704f | 43 | _info.pageSize = 264; |
LeoHsueh |
7:2f9d8b47704f | 44 | _info.pageLength = 4095; |
LeoHsueh | 9:8b1cf34d290e | 45 | DF_CS_inactive; |
okini3939 | 0:2e953bbaf3a5 | 46 | } |
okini3939 | 0:2e953bbaf3a5 | 47 | |
okini3939 | 0:2e953bbaf3a5 | 48 | /** |
okini3939 | 0:2e953bbaf3a5 | 49 | * Read status register |
okini3939 | 0:2e953bbaf3a5 | 50 | * @return The content of the status register |
okini3939 | 0:2e953bbaf3a5 | 51 | **/ |
LeoHsueh |
6:1872f591d604 | 52 | uint8_t ATD45DB161D::ReadStatusRegister() { |
okini3939 | 0:2e953bbaf3a5 | 53 | uint8_t status; |
okini3939 | 0:2e953bbaf3a5 | 54 | |
LeoHsueh |
6:1872f591d604 | 55 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 56 | DF_CS_active; /* to reset Dataflash command decoder */ |
LeoHsueh |
6:1872f591d604 | 57 | |
okini3939 | 0:2e953bbaf3a5 | 58 | /* Send status read command */ |
LeoHsueh |
5:ef7247c6f073 | 59 | _spi->write(AT45DB161D_STATUS_REGISTER_READ); |
okini3939 | 0:2e953bbaf3a5 | 60 | /* Get result with a dummy write */ |
LeoHsueh |
5:ef7247c6f073 | 61 | status = _spi->write(0x00); |
okini3939 | 0:2e953bbaf3a5 | 62 | |
okini3939 | 0:2e953bbaf3a5 | 63 | return status; |
okini3939 | 0:2e953bbaf3a5 | 64 | } |
okini3939 | 0:2e953bbaf3a5 | 65 | |
okini3939 | 0:2e953bbaf3a5 | 66 | /** |
okini3939 | 0:2e953bbaf3a5 | 67 | * Read Manufacturer and Device ID |
okini3939 | 0:2e953bbaf3a5 | 68 | * @note if id.extendedInfoLength is not equal to zero, |
LeoHsueh |
5:ef7247c6f073 | 69 | * successive calls to _spi->write(0xff) will return |
okini3939 | 0:2e953bbaf3a5 | 70 | * the extended device information string bytes. |
okini3939 | 0:2e953bbaf3a5 | 71 | * @param id Pointer to the ID structure to initialize |
okini3939 | 0:2e953bbaf3a5 | 72 | **/ |
LeoHsueh |
7:2f9d8b47704f | 73 | ATD45DB161D::Info *ATD45DB161D::getInfo() { |
LeoHsueh |
7:2f9d8b47704f | 74 | return &_info; |
okini3939 | 0:2e953bbaf3a5 | 75 | } |
okini3939 | 0:2e953bbaf3a5 | 76 | |
okini3939 | 0:2e953bbaf3a5 | 77 | /** |
okini3939 | 0:2e953bbaf3a5 | 78 | * Main Memory Page Read. |
okini3939 | 0:2e953bbaf3a5 | 79 | * A main memory page read allows the user to read data directly from |
okini3939 | 0:2e953bbaf3a5 | 80 | * any one of the 4096 pages in the main memory, bypassing both of the |
okini3939 | 0:2e953bbaf3a5 | 81 | * data buffers and leaving the contents of the buffers unchanged. |
okini3939 | 0:2e953bbaf3a5 | 82 | * |
okini3939 | 0:2e953bbaf3a5 | 83 | * @param page Page of the main memory to read |
okini3939 | 0:2e953bbaf3a5 | 84 | * @param offset Starting byte address within the page |
okini3939 | 0:2e953bbaf3a5 | 85 | **/ |
LeoHsueh |
6:1872f591d604 | 86 | void ATD45DB161D::ReadMainMemoryPage(uint16_t page, uint16_t offset) { |
LeoHsueh |
6:1872f591d604 | 87 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 88 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 89 | |
okini3939 | 0:2e953bbaf3a5 | 90 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 91 | _spi->write(AT45DB161D_PAGE_READ); |
okini3939 | 0:2e953bbaf3a5 | 92 | |
okini3939 | 0:2e953bbaf3a5 | 93 | /* Address (page | offset) */ |
LeoHsueh |
6:1872f591d604 | 94 | _spi->write((uint8_t) (page >> 6)); |
LeoHsueh |
6:1872f591d604 | 95 | _spi->write((uint8_t) ((page << 2) | (offset >> 8))); |
LeoHsueh |
6:1872f591d604 | 96 | _spi->write((uint8_t) (offset & 0xff)); |
okini3939 | 0:2e953bbaf3a5 | 97 | |
okini3939 | 0:2e953bbaf3a5 | 98 | /* 4 "don't care" bytes */ |
LeoHsueh |
5:ef7247c6f073 | 99 | _spi->write(0x00); |
LeoHsueh |
5:ef7247c6f073 | 100 | _spi->write(0x00); |
LeoHsueh |
5:ef7247c6f073 | 101 | _spi->write(0x00); |
LeoHsueh |
5:ef7247c6f073 | 102 | _spi->write(0x00); |
okini3939 | 0:2e953bbaf3a5 | 103 | } |
okini3939 | 0:2e953bbaf3a5 | 104 | |
okini3939 | 0:2e953bbaf3a5 | 105 | /** |
okini3939 | 0:2e953bbaf3a5 | 106 | * Continuous Array Read. |
okini3939 | 0:2e953bbaf3a5 | 107 | * Sequentially read a continuous stream of data. |
okini3939 | 0:2e953bbaf3a5 | 108 | * @param page Page of the main memory where the sequential read will start |
okini3939 | 0:2e953bbaf3a5 | 109 | * @param offset Starting byte address within the page |
okini3939 | 0:2e953bbaf3a5 | 110 | * @param low If true the read operation will be performed in low speed mode (and in high speed mode if it's false). |
okini3939 | 0:2e953bbaf3a5 | 111 | * @note The legacy mode is not currently supported |
okini3939 | 0:2e953bbaf3a5 | 112 | **/ |
LeoHsueh |
6:1872f591d604 | 113 | void ATD45DB161D::ContinuousArrayRead(uint16_t page, uint16_t offset, uint8_t low) { |
LeoHsueh |
6:1872f591d604 | 114 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 115 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 116 | |
okini3939 | 0:2e953bbaf3a5 | 117 | /* Send opcode */ |
LeoHsueh |
6:1872f591d604 | 118 | _spi->write(low ? AT45DB161D_CONTINUOUS_READ_LOW_FREQ : |
LeoHsueh |
6:1872f591d604 | 119 | AT45DB161D_CONTINUOUS_READ_HIGH_FREQ); |
okini3939 | 0:2e953bbaf3a5 | 120 | |
okini3939 | 0:2e953bbaf3a5 | 121 | /* Address (page | offset) */ |
LeoHsueh |
6:1872f591d604 | 122 | _spi->write((uint8_t) (page >> 6)); |
LeoHsueh |
6:1872f591d604 | 123 | _spi->write((uint8_t) ((page << 2) | (offset >> 8))); |
LeoHsueh |
6:1872f591d604 | 124 | _spi->write((uint8_t) (offset & 0xff)); |
okini3939 | 0:2e953bbaf3a5 | 125 | |
LeoHsueh |
6:1872f591d604 | 126 | if (!low) { |
LeoHsueh |
6:1872f591d604 | 127 | _spi->write(0x00); |
LeoHsueh |
6:1872f591d604 | 128 | } |
okini3939 | 0:2e953bbaf3a5 | 129 | } |
okini3939 | 0:2e953bbaf3a5 | 130 | |
LeoHsueh |
8:1ec3997fe258 | 131 | void ATD45DB161D::readBuffer(uint16_t page, void *ptr, uint16_t len) { |
leolleeooleo |
4:943690efda8b | 132 | uint8_t *buf = reinterpret_cast<uint8_t*>(ptr); |
LeoHsueh |
7:2f9d8b47704f | 133 | uint16_t i; |
LeoHsueh |
7:2f9d8b47704f | 134 | while (len > 0) { |
LeoHsueh |
8:1ec3997fe258 | 135 | PageToBuffer(page++, 1); |
LeoHsueh |
8:1ec3997fe258 | 136 | BufferRead(1, 0, 1); |
LeoHsueh |
7:2f9d8b47704f | 137 | uint16_t wlen = (_info.pageSize < len ? _info.pageSize : len); |
LeoHsueh |
7:2f9d8b47704f | 138 | for (i = 0; i < wlen; i++) { |
LeoHsueh |
7:2f9d8b47704f | 139 | *buf++ = _spi->write(0xff); |
LeoHsueh |
7:2f9d8b47704f | 140 | } |
LeoHsueh |
7:2f9d8b47704f | 141 | len -= wlen; |
??? |
3:82157896d90d | 142 | } |
LeoHsueh | 9:8b1cf34d290e | 143 | DF_CS_inactive; |
??? |
3:82157896d90d | 144 | } |
??? |
3:82157896d90d | 145 | |
LeoHsueh |
8:1ec3997fe258 | 146 | void ATD45DB161D::writeBuffer(uint16_t page, void *ptr, uint16_t len) { |
leolleeooleo |
4:943690efda8b | 147 | uint8_t *buf = reinterpret_cast<uint8_t*>(ptr); |
??? |
3:82157896d90d | 148 | uint16_t i; |
??? |
3:82157896d90d | 149 | while (len > 0) { |
LeoHsueh |
8:1ec3997fe258 | 150 | BufferWrite(2, 0); |
LeoHsueh |
7:2f9d8b47704f | 151 | uint16_t wlen = (_info.pageSize < len ? _info.pageSize : len); |
leolleeooleo |
4:943690efda8b | 152 | for (i = 0; i < wlen; i++) { |
LeoHsueh |
5:ef7247c6f073 | 153 | _spi->write(*buf++); |
??? |
3:82157896d90d | 154 | } |
LeoHsueh |
8:1ec3997fe258 | 155 | BufferToPage(2, page++, 1); |
leolleeooleo |
4:943690efda8b | 156 | len -= wlen; |
??? |
3:82157896d90d | 157 | } |
LeoHsueh | 9:8b1cf34d290e | 158 | DF_CS_inactive; |
??? |
3:82157896d90d | 159 | } |
okini3939 | 0:2e953bbaf3a5 | 160 | |
okini3939 | 0:2e953bbaf3a5 | 161 | /** |
okini3939 | 0:2e953bbaf3a5 | 162 | * Read the content of one of the SRAM data buffers (in low or high speed mode). |
okini3939 | 0:2e953bbaf3a5 | 163 | * @param bufferNum Buffer to read (1 or 2) |
okini3939 | 0:2e953bbaf3a5 | 164 | * @param offset Starting byte within the buffer |
okini3939 | 0:2e953bbaf3a5 | 165 | * @param low If true the read operation will be performed in low speed mode (and in high speed mode if it's false). |
okini3939 | 0:2e953bbaf3a5 | 166 | **/ |
LeoHsueh |
6:1872f591d604 | 167 | void ATD45DB161D::BufferRead(uint8_t bufferNum, uint16_t offset, uint8_t low) { |
LeoHsueh |
6:1872f591d604 | 168 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 169 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 170 | |
okini3939 | 0:2e953bbaf3a5 | 171 | /* Send opcode */ |
LeoHsueh |
6:1872f591d604 | 172 | if (bufferNum == 1) { |
LeoHsueh |
5:ef7247c6f073 | 173 | _spi->write(low ? AT45DB161D_BUFFER_1_READ_LOW_FREQ : |
LeoHsueh |
6:1872f591d604 | 174 | AT45DB161D_BUFFER_1_READ); |
LeoHsueh |
6:1872f591d604 | 175 | } else { |
LeoHsueh |
5:ef7247c6f073 | 176 | _spi->write(low ? AT45DB161D_BUFFER_2_READ_LOW_FREQ : |
LeoHsueh |
6:1872f591d604 | 177 | AT45DB161D_BUFFER_2_READ); |
okini3939 | 0:2e953bbaf3a5 | 178 | |
okini3939 | 0:2e953bbaf3a5 | 179 | } |
okini3939 | 0:2e953bbaf3a5 | 180 | |
okini3939 | 0:2e953bbaf3a5 | 181 | /* 14 "Don't care" bits */ |
LeoHsueh |
5:ef7247c6f073 | 182 | _spi->write(0x00); |
okini3939 | 0:2e953bbaf3a5 | 183 | /* Rest of the "don't care" bits + bits 8,9 of the offset */ |
LeoHsueh |
6:1872f591d604 | 184 | _spi->write((uint8_t) (offset >> 8)); |
okini3939 | 0:2e953bbaf3a5 | 185 | /* bits 7-0 of the offset */ |
LeoHsueh |
6:1872f591d604 | 186 | _spi->write((uint8_t) (offset & 0xff)); |
okini3939 | 0:2e953bbaf3a5 | 187 | } |
okini3939 | 0:2e953bbaf3a5 | 188 | |
okini3939 | 0:2e953bbaf3a5 | 189 | /** |
okini3939 | 0:2e953bbaf3a5 | 190 | * Write data to one of the SRAM data buffers. Any further call to |
okini3939 | 0:2e953bbaf3a5 | 191 | * spi_tranfer will return bytes contained in the data buffer until |
okini3939 | 0:2e953bbaf3a5 | 192 | * a low-to-high transition is detected on the CS pin. If the end of |
okini3939 | 0:2e953bbaf3a5 | 193 | * the data buffer is reached, the device will wrap around back to the |
okini3939 | 0:2e953bbaf3a5 | 194 | * beginning of the buffer. |
okini3939 | 0:2e953bbaf3a5 | 195 | * @param bufferNum Buffer to read (1 or 2) |
okini3939 | 0:2e953bbaf3a5 | 196 | * @param offset Starting byte within the buffer |
okini3939 | 0:2e953bbaf3a5 | 197 | **/ |
LeoHsueh |
6:1872f591d604 | 198 | void ATD45DB161D::BufferWrite(uint8_t bufferNum, uint16_t offset) { |
LeoHsueh |
6:1872f591d604 | 199 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 200 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 201 | |
LeoHsueh |
6:1872f591d604 | 202 | _spi->write((bufferNum == 1) ? AT45DB161D_BUFFER_1_WRITE : |
LeoHsueh |
6:1872f591d604 | 203 | AT45DB161D_BUFFER_2_WRITE); |
okini3939 | 0:2e953bbaf3a5 | 204 | |
okini3939 | 0:2e953bbaf3a5 | 205 | /* 14 "Don't care" bits */ |
LeoHsueh |
5:ef7247c6f073 | 206 | _spi->write(0x00); |
okini3939 | 0:2e953bbaf3a5 | 207 | /* Rest of the "don't care" bits + bits 8,9 of the offset */ |
LeoHsueh |
6:1872f591d604 | 208 | _spi->write((uint8_t) (offset >> 8)); |
okini3939 | 0:2e953bbaf3a5 | 209 | /* bits 7-0 of the offset */ |
LeoHsueh |
6:1872f591d604 | 210 | _spi->write((uint8_t) (offset & 0xff)); |
okini3939 | 0:2e953bbaf3a5 | 211 | } |
okini3939 | 0:2e953bbaf3a5 | 212 | |
okini3939 | 0:2e953bbaf3a5 | 213 | /** |
okini3939 | 0:2e953bbaf3a5 | 214 | * Transfer data from buffer 1 or 2 to main memory page. |
okini3939 | 0:2e953bbaf3a5 | 215 | * @param bufferNum Buffer to use (1 or 2) |
okini3939 | 0:2e953bbaf3a5 | 216 | * @param page Page where the content of the buffer will transfered |
okini3939 | 0:2e953bbaf3a5 | 217 | * @param erase If set the page will be first erased before the buffer transfer. |
okini3939 | 0:2e953bbaf3a5 | 218 | * @note If erase is equal to zero, the page must have been previously erased using one of the erase command (Page or Block Erase). |
okini3939 | 0:2e953bbaf3a5 | 219 | **/ |
LeoHsueh |
6:1872f591d604 | 220 | void ATD45DB161D::BufferToPage(uint8_t bufferNum, uint16_t page, uint8_t erase) { |
LeoHsueh |
6:1872f591d604 | 221 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 222 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 223 | |
okini3939 | 0:2e953bbaf3a5 | 224 | /* Opcode */ |
LeoHsueh |
6:1872f591d604 | 225 | if (erase) { |
LeoHsueh |
6:1872f591d604 | 226 | _spi->write((bufferNum == 1) ? AT45DB161D_BUFFER_1_TO_PAGE_WITH_ERASE : |
LeoHsueh |
6:1872f591d604 | 227 | AT45DB161D_BUFFER_2_TO_PAGE_WITH_ERASE); |
LeoHsueh |
6:1872f591d604 | 228 | } else { |
LeoHsueh |
6:1872f591d604 | 229 | _spi->write((bufferNum == 1) ? AT45DB161D_BUFFER_1_TO_PAGE_WITHOUT_ERASE : |
LeoHsueh |
6:1872f591d604 | 230 | AT45DB161D_BUFFER_2_TO_PAGE_WITHOUT_ERASE); |
okini3939 | 0:2e953bbaf3a5 | 231 | } |
okini3939 | 0:2e953bbaf3a5 | 232 | |
okini3939 | 0:2e953bbaf3a5 | 233 | /* |
okini3939 | 0:2e953bbaf3a5 | 234 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 235 | * - 2 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 236 | * - 12 page address bits (PA11 - PA0) that specify the page in |
okini3939 | 0:2e953bbaf3a5 | 237 | * the main memory to be written |
okini3939 | 0:2e953bbaf3a5 | 238 | * - 10 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 239 | */ |
LeoHsueh |
6:1872f591d604 | 240 | _spi->write((uint8_t) (page >> 6)); |
LeoHsueh |
6:1872f591d604 | 241 | _spi->write((uint8_t) (page << 2)); |
LeoHsueh |
5:ef7247c6f073 | 242 | _spi->write(0x00); |
okini3939 | 0:2e953bbaf3a5 | 243 | |
LeoHsueh |
6:1872f591d604 | 244 | DF_CS_inactive; /* Start transfer */ |
LeoHsueh |
6:1872f591d604 | 245 | DF_CS_active; /* If erase was set, the page will first be erased */ |
okini3939 | 0:2e953bbaf3a5 | 246 | |
okini3939 | 0:2e953bbaf3a5 | 247 | /* Wait for the end of the transfer */ |
LeoHsueh |
6:1872f591d604 | 248 | while (!(ReadStatusRegister() & READY_BUSY)) { |
LeoHsueh |
6:1872f591d604 | 249 | } |
okini3939 | 0:2e953bbaf3a5 | 250 | } |
okini3939 | 0:2e953bbaf3a5 | 251 | |
okini3939 | 0:2e953bbaf3a5 | 252 | /** |
okini3939 | 0:2e953bbaf3a5 | 253 | * Transfer a page of data from main memory to buffer 1 or 2. |
okini3939 | 0:2e953bbaf3a5 | 254 | * @param page Main memory page to transfer |
okini3939 | 0:2e953bbaf3a5 | 255 | * @param buffer Buffer (1 or 2) where the data will be written |
okini3939 | 0:2e953bbaf3a5 | 256 | **/ |
LeoHsueh |
6:1872f591d604 | 257 | void ATD45DB161D::PageToBuffer(uint16_t page, uint8_t bufferNum) { |
LeoHsueh |
6:1872f591d604 | 258 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 259 | DF_CS_active; /* to reset Dataflash command decoder */ |
LeoHsueh |
6:1872f591d604 | 260 | |
okini3939 | 0:2e953bbaf3a5 | 261 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 262 | _spi->write((bufferNum == 1) ? AT45DB161D_TRANSFER_PAGE_TO_BUFFER_1 : |
LeoHsueh |
6:1872f591d604 | 263 | AT45DB161D_TRANSFER_PAGE_TO_BUFFER_2); |
okini3939 | 0:2e953bbaf3a5 | 264 | |
okini3939 | 0:2e953bbaf3a5 | 265 | /* |
okini3939 | 0:2e953bbaf3a5 | 266 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 267 | * - 2 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 268 | * - 12 page address bits (PA11 - PA0) that specify the page in |
okini3939 | 0:2e953bbaf3a5 | 269 | * the main memory to be written |
okini3939 | 0:2e953bbaf3a5 | 270 | * - 10 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 271 | */ |
LeoHsueh |
6:1872f591d604 | 272 | _spi->write((uint8_t) (page >> 6)); |
LeoHsueh |
6:1872f591d604 | 273 | _spi->write((uint8_t) (page << 2)); |
LeoHsueh |
5:ef7247c6f073 | 274 | _spi->write(0x00); |
LeoHsueh |
6:1872f591d604 | 275 | |
LeoHsueh |
6:1872f591d604 | 276 | DF_CS_inactive; /* Start page transfer */ |
okini3939 | 0:2e953bbaf3a5 | 277 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 278 | |
okini3939 | 0:2e953bbaf3a5 | 279 | /* Wait for the end of the transfer */ |
LeoHsueh |
6:1872f591d604 | 280 | while (!(ReadStatusRegister() & READY_BUSY)) { |
LeoHsueh |
6:1872f591d604 | 281 | } |
okini3939 | 0:2e953bbaf3a5 | 282 | } |
okini3939 | 0:2e953bbaf3a5 | 283 | |
okini3939 | 0:2e953bbaf3a5 | 284 | /** |
okini3939 | 0:2e953bbaf3a5 | 285 | * Erase a page in the main memory array. |
okini3939 | 0:2e953bbaf3a5 | 286 | * @param page Page to erase |
okini3939 | 0:2e953bbaf3a5 | 287 | **/ |
LeoHsueh |
6:1872f591d604 | 288 | void ATD45DB161D::PageErase(uint16_t page) { |
LeoHsueh |
6:1872f591d604 | 289 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 290 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 291 | |
okini3939 | 0:2e953bbaf3a5 | 292 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 293 | _spi->write(AT45DB161D_PAGE_ERASE); |
okini3939 | 0:2e953bbaf3a5 | 294 | |
okini3939 | 0:2e953bbaf3a5 | 295 | /* |
okini3939 | 0:2e953bbaf3a5 | 296 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 297 | * - 2 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 298 | * - 12 page address bits (PA11 - PA0) that specify the page in |
okini3939 | 0:2e953bbaf3a5 | 299 | * the main memory to be written |
okini3939 | 0:2e953bbaf3a5 | 300 | * - 10 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 301 | */ |
LeoHsueh |
6:1872f591d604 | 302 | _spi->write((uint8_t) (page >> 6)); |
LeoHsueh |
6:1872f591d604 | 303 | _spi->write((uint8_t) (page << 2)); |
LeoHsueh |
5:ef7247c6f073 | 304 | _spi->write(0x00); |
LeoHsueh |
6:1872f591d604 | 305 | |
LeoHsueh |
6:1872f591d604 | 306 | DF_CS_inactive; /* Start block erase */ |
okini3939 | 0:2e953bbaf3a5 | 307 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 308 | |
okini3939 | 0:2e953bbaf3a5 | 309 | /* Wait for the end of the block erase operation */ |
LeoHsueh |
6:1872f591d604 | 310 | while (!(ReadStatusRegister() & READY_BUSY)) { |
LeoHsueh |
6:1872f591d604 | 311 | } |
okini3939 | 0:2e953bbaf3a5 | 312 | } |
okini3939 | 0:2e953bbaf3a5 | 313 | |
okini3939 | 0:2e953bbaf3a5 | 314 | /** |
okini3939 | 0:2e953bbaf3a5 | 315 | * Erase a block of eight pages at one time. |
okini3939 | 0:2e953bbaf3a5 | 316 | * @param block Index of the block to erase |
okini3939 | 0:2e953bbaf3a5 | 317 | **/ |
LeoHsueh |
6:1872f591d604 | 318 | void ATD45DB161D::BlockErase(uint16_t block) { |
LeoHsueh |
6:1872f591d604 | 319 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 320 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 321 | |
okini3939 | 0:2e953bbaf3a5 | 322 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 323 | _spi->write(AT45DB161D_BLOCK_ERASE); |
okini3939 | 0:2e953bbaf3a5 | 324 | |
okini3939 | 0:2e953bbaf3a5 | 325 | /* |
okini3939 | 0:2e953bbaf3a5 | 326 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 327 | * - 2 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 328 | * - 9 block address bits (PA11 - PA3) |
okini3939 | 0:2e953bbaf3a5 | 329 | * - 13 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 330 | */ |
LeoHsueh |
6:1872f591d604 | 331 | _spi->write((uint8_t) (block >> 3)); |
LeoHsueh |
6:1872f591d604 | 332 | _spi->write((uint8_t) (block << 5)); |
LeoHsueh |
5:ef7247c6f073 | 333 | _spi->write(0x00); |
LeoHsueh |
6:1872f591d604 | 334 | |
LeoHsueh |
6:1872f591d604 | 335 | DF_CS_inactive; /* Start block erase */ |
okini3939 | 0:2e953bbaf3a5 | 336 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 337 | |
okini3939 | 0:2e953bbaf3a5 | 338 | /* Wait for the end of the block erase operation */ |
LeoHsueh |
6:1872f591d604 | 339 | while (!(ReadStatusRegister() & READY_BUSY)) { |
LeoHsueh |
6:1872f591d604 | 340 | } |
okini3939 | 0:2e953bbaf3a5 | 341 | } |
okini3939 | 0:2e953bbaf3a5 | 342 | |
okini3939 | 0:2e953bbaf3a5 | 343 | /** |
okini3939 | 0:2e953bbaf3a5 | 344 | * Erase a sector in main memory. There are 16 sector on the |
okini3939 | 0:2e953bbaf3a5 | 345 | * at45db161d and only one can be erased at one time. |
okini3939 | 0:2e953bbaf3a5 | 346 | * @param sector Sector to erase (1-15) |
okini3939 | 0:2e953bbaf3a5 | 347 | **/ |
LeoHsueh |
6:1872f591d604 | 348 | void ATD45DB161D::SectoreErase(uint8_t sector) { |
LeoHsueh |
6:1872f591d604 | 349 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 350 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 351 | |
okini3939 | 0:2e953bbaf3a5 | 352 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 353 | _spi->write(AT45DB161D_SECTOR_ERASE); |
okini3939 | 0:2e953bbaf3a5 | 354 | |
okini3939 | 0:2e953bbaf3a5 | 355 | /* |
okini3939 | 0:2e953bbaf3a5 | 356 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 357 | */ |
LeoHsueh |
6:1872f591d604 | 358 | if ((sector == 0x0a) || (sector == 0x0b)) { |
okini3939 | 0:2e953bbaf3a5 | 359 | /* |
okini3939 | 0:2e953bbaf3a5 | 360 | * - 11 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 361 | * - |
okini3939 | 0:2e953bbaf3a5 | 362 | * - 12 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 363 | */ |
LeoHsueh |
5:ef7247c6f073 | 364 | _spi->write(0x00); |
LeoHsueh |
5:ef7247c6f073 | 365 | _spi->write(((sector & 0x01) << 4)); |
LeoHsueh |
5:ef7247c6f073 | 366 | _spi->write(0x00); |
LeoHsueh |
6:1872f591d604 | 367 | } else { |
okini3939 | 0:2e953bbaf3a5 | 368 | /* |
okini3939 | 0:2e953bbaf3a5 | 369 | * - 2 don't care bits |
okini3939 | 0:2e953bbaf3a5 | 370 | * - 4 sector number bits |
okini3939 | 0:2e953bbaf3a5 | 371 | * - 18 don't care bits |
okini3939 | 0:2e953bbaf3a5 | 372 | */ |
LeoHsueh |
5:ef7247c6f073 | 373 | _spi->write(sector << 1); |
LeoHsueh |
5:ef7247c6f073 | 374 | _spi->write(0x00); |
LeoHsueh |
5:ef7247c6f073 | 375 | _spi->write(0x00); |
okini3939 | 0:2e953bbaf3a5 | 376 | } |
LeoHsueh |
6:1872f591d604 | 377 | |
LeoHsueh |
6:1872f591d604 | 378 | DF_CS_inactive; /* Start block erase */ |
okini3939 | 0:2e953bbaf3a5 | 379 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 380 | |
okini3939 | 0:2e953bbaf3a5 | 381 | /* Wait for the end of the block erase operation */ |
LeoHsueh |
6:1872f591d604 | 382 | while (!(ReadStatusRegister() & READY_BUSY)) { |
LeoHsueh |
6:1872f591d604 | 383 | } |
okini3939 | 0:2e953bbaf3a5 | 384 | } |
okini3939 | 0:2e953bbaf3a5 | 385 | |
okini3939 | 0:2e953bbaf3a5 | 386 | /** |
okini3939 | 0:2e953bbaf3a5 | 387 | * Erase the entire chip memory. Sectors proteced or locked down will |
okini3939 | 0:2e953bbaf3a5 | 388 | * not be erased. |
okini3939 | 0:2e953bbaf3a5 | 389 | **/ |
LeoHsueh |
6:1872f591d604 | 390 | void ATD45DB161D::ChipErase() { |
LeoHsueh |
6:1872f591d604 | 391 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 392 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 393 | |
okini3939 | 0:2e953bbaf3a5 | 394 | /* Send chip erase sequence */ |
LeoHsueh |
5:ef7247c6f073 | 395 | _spi->write(AT45DB161D_CHIP_ERASE_0); |
LeoHsueh |
5:ef7247c6f073 | 396 | _spi->write(AT45DB161D_CHIP_ERASE_1); |
LeoHsueh |
5:ef7247c6f073 | 397 | _spi->write(AT45DB161D_CHIP_ERASE_2); |
LeoHsueh |
5:ef7247c6f073 | 398 | _spi->write(AT45DB161D_CHIP_ERASE_3); |
LeoHsueh |
6:1872f591d604 | 399 | |
LeoHsueh |
6:1872f591d604 | 400 | DF_CS_inactive; /* Start chip erase */ |
okini3939 | 0:2e953bbaf3a5 | 401 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 402 | |
okini3939 | 0:2e953bbaf3a5 | 403 | /* Wait for the end of the chip erase operation */ |
LeoHsueh |
6:1872f591d604 | 404 | while (!(ReadStatusRegister() & READY_BUSY)) |
LeoHsueh |
6:1872f591d604 | 405 | ; |
okini3939 | 0:2e953bbaf3a5 | 406 | } |
okini3939 | 0:2e953bbaf3a5 | 407 | |
okini3939 | 0:2e953bbaf3a5 | 408 | /** |
okini3939 | 0:2e953bbaf3a5 | 409 | * This a combination of Buffer Write and Buffer to Page with |
okini3939 | 0:2e953bbaf3a5 | 410 | * Built-in Erase. |
okini3939 | 0:2e953bbaf3a5 | 411 | * @note You must call EndAndWait in order to start transfering data from buffer to page |
okini3939 | 0:2e953bbaf3a5 | 412 | * @param page Page where the content of the buffer will transfered |
okini3939 | 0:2e953bbaf3a5 | 413 | * @param offset Starting byte address within the buffer |
okini3939 | 0:2e953bbaf3a5 | 414 | * @param bufferNum Buffer to use (1 or 2) |
okini3939 | 0:2e953bbaf3a5 | 415 | * @warning UNTESTED |
okini3939 | 0:2e953bbaf3a5 | 416 | **/ |
LeoHsueh |
6:1872f591d604 | 417 | void ATD45DB161D::BeginPageWriteThroughBuffer(uint16_t page, uint16_t offset, uint8_t bufferNum) { |
LeoHsueh |
6:1872f591d604 | 418 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 419 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 420 | |
okini3939 | 0:2e953bbaf3a5 | 421 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 422 | _spi->write((bufferNum == 1) ? AT45DB161D_PAGE_THROUGH_BUFFER_1 : |
LeoHsueh |
6:1872f591d604 | 423 | AT45DB161D_PAGE_THROUGH_BUFFER_2); |
okini3939 | 0:2e953bbaf3a5 | 424 | |
okini3939 | 0:2e953bbaf3a5 | 425 | /* Address */ |
LeoHsueh |
6:1872f591d604 | 426 | _spi->write((uint8_t) (page >> 6)); |
LeoHsueh |
6:1872f591d604 | 427 | _spi->write((uint8_t) ((page << 2) | (offset >> 8))); |
LeoHsueh |
6:1872f591d604 | 428 | _spi->write((uint8_t) offset); |
okini3939 | 0:2e953bbaf3a5 | 429 | } |
okini3939 | 0:2e953bbaf3a5 | 430 | |
okini3939 | 0:2e953bbaf3a5 | 431 | /** |
okini3939 | 0:2e953bbaf3a5 | 432 | * Perform a low-to-high transition on the CS pin and then poll |
okini3939 | 0:2e953bbaf3a5 | 433 | * the status register to check if the dataflash is busy. |
okini3939 | 0:2e953bbaf3a5 | 434 | **/ |
LeoHsueh |
6:1872f591d604 | 435 | void ATD45DB161D::EndAndWait() { |
LeoHsueh |
6:1872f591d604 | 436 | DF_CS_inactive; /* End current operation */ |
LeoHsueh |
6:1872f591d604 | 437 | DF_CS_active; /* Some internal operation may occur |
LeoHsueh |
6:1872f591d604 | 438 | * (buffer to page transfer, page erase, etc... ) */ |
okini3939 | 0:2e953bbaf3a5 | 439 | |
okini3939 | 0:2e953bbaf3a5 | 440 | /* Wait for the chip to be ready */ |
LeoHsueh |
6:1872f591d604 | 441 | while (!(ReadStatusRegister() & READY_BUSY)) { |
LeoHsueh |
6:1872f591d604 | 442 | } |
LeoHsueh |
6:1872f591d604 | 443 | |
LeoHsueh |
6:1872f591d604 | 444 | DF_CS_inactive; /* Release SPI Bus */ |
okini3939 | 0:2e953bbaf3a5 | 445 | } |
okini3939 | 0:2e953bbaf3a5 | 446 | |
okini3939 | 0:2e953bbaf3a5 | 447 | /** |
okini3939 | 0:2e953bbaf3a5 | 448 | * Compare a page of data in main memory to the data in buffer 1 or 2. |
okini3939 | 0:2e953bbaf3a5 | 449 | * @param page Page to test |
okini3939 | 0:2e953bbaf3a5 | 450 | * @param bufferNum Buffer number |
okini3939 | 0:2e953bbaf3a5 | 451 | * @return |
okini3939 | 0:2e953bbaf3a5 | 452 | * - 1 if the page and the buffer contains the same data |
okini3939 | 0:2e953bbaf3a5 | 453 | * - 0 else |
okini3939 | 0:2e953bbaf3a5 | 454 | * @warning UNTESTED |
okini3939 | 0:2e953bbaf3a5 | 455 | **/ |
LeoHsueh |
6:1872f591d604 | 456 | int8_t ATD45DB161D::ComparePageToBuffer(uint16_t page, uint8_t bufferNum) { |
okini3939 | 0:2e953bbaf3a5 | 457 | uint8_t status; |
okini3939 | 0:2e953bbaf3a5 | 458 | |
LeoHsueh |
6:1872f591d604 | 459 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 460 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 461 | |
okini3939 | 0:2e953bbaf3a5 | 462 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 463 | _spi->write((bufferNum == 1) ? AT45DB161D_COMPARE_PAGE_TO_BUFFER_1 : |
LeoHsueh |
6:1872f591d604 | 464 | AT45DB161D_COMPARE_PAGE_TO_BUFFER_2); |
okini3939 | 0:2e953bbaf3a5 | 465 | |
okini3939 | 0:2e953bbaf3a5 | 466 | /* Page address */ |
LeoHsueh |
6:1872f591d604 | 467 | _spi->write((uint8_t) (page >> 6)); |
LeoHsueh |
6:1872f591d604 | 468 | _spi->write((uint8_t) (page << 2)); |
LeoHsueh |
5:ef7247c6f073 | 469 | _spi->write(0x00); |
okini3939 | 0:2e953bbaf3a5 | 470 | |
LeoHsueh |
6:1872f591d604 | 471 | DF_CS_inactive; /* Start comparaison */ |
okini3939 | 0:2e953bbaf3a5 | 472 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 473 | |
okini3939 | 0:2e953bbaf3a5 | 474 | /* Wait for the end of the comparaison and get the result */ |
LeoHsueh |
6:1872f591d604 | 475 | while (!((status = ReadStatusRegister()) & READY_BUSY)) { |
LeoHsueh |
6:1872f591d604 | 476 | } |
LeoHsueh |
6:1872f591d604 | 477 | |
okini3939 | 0:2e953bbaf3a5 | 478 | // return ((status & COMPARE) == COMPARE); |
LeoHsueh |
6:1872f591d604 | 479 | return ((status & COMPARE) ? 0 : 1); |
okini3939 | 0:2e953bbaf3a5 | 480 | } |
okini3939 | 0:2e953bbaf3a5 | 481 | |
okini3939 | 0:2e953bbaf3a5 | 482 | /** |
okini3939 | 0:2e953bbaf3a5 | 483 | * Put the device into the lowest power consumption mode. |
okini3939 | 0:2e953bbaf3a5 | 484 | * Once the device has entered the Deep Power-down mode, all |
okini3939 | 0:2e953bbaf3a5 | 485 | * instructions are ignored except the Resume from Deep |
okini3939 | 0:2e953bbaf3a5 | 486 | * Power-down command. |
okini3939 | 0:2e953bbaf3a5 | 487 | * @warning UNTESTED |
okini3939 | 0:2e953bbaf3a5 | 488 | **/ |
LeoHsueh |
6:1872f591d604 | 489 | void ATD45DB161D::DeepPowerDown() { |
LeoHsueh |
6:1872f591d604 | 490 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 491 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 492 | |
okini3939 | 0:2e953bbaf3a5 | 493 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 494 | _spi->write(AT45DB161D_DEEP_POWER_DOWN); |
okini3939 | 0:2e953bbaf3a5 | 495 | |
okini3939 | 0:2e953bbaf3a5 | 496 | /* Enter Deep Power-Down mode */ |
okini3939 | 0:2e953bbaf3a5 | 497 | DF_CS_inactive; |
okini3939 | 0:2e953bbaf3a5 | 498 | |
okini3939 | 0:2e953bbaf3a5 | 499 | /* Safety delay */ |
okini3939 | 0:2e953bbaf3a5 | 500 | // delay(100); |
okini3939 | 0:2e953bbaf3a5 | 501 | wait_ms(100); |
okini3939 | 0:2e953bbaf3a5 | 502 | } |
okini3939 | 0:2e953bbaf3a5 | 503 | |
okini3939 | 0:2e953bbaf3a5 | 504 | /** |
okini3939 | 0:2e953bbaf3a5 | 505 | * Takes the device out of Deep Power-down mode. |
okini3939 | 0:2e953bbaf3a5 | 506 | **/ |
LeoHsueh |
6:1872f591d604 | 507 | void ATD45DB161D::ResumeFromDeepPowerDown() { |
LeoHsueh |
6:1872f591d604 | 508 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
LeoHsueh |
6:1872f591d604 | 509 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 510 | |
okini3939 | 0:2e953bbaf3a5 | 511 | /* Send opcode */ |
LeoHsueh |
5:ef7247c6f073 | 512 | _spi->write(AT45DB161D_RESUME_FROM_DEEP_POWER_DOWN); |
okini3939 | 0:2e953bbaf3a5 | 513 | |
okini3939 | 0:2e953bbaf3a5 | 514 | /* Resume device */ |
okini3939 | 0:2e953bbaf3a5 | 515 | DF_CS_inactive; |
okini3939 | 0:2e953bbaf3a5 | 516 | |
okini3939 | 0:2e953bbaf3a5 | 517 | /* The CS pin must stay high during t_RDPD microseconds before the device |
okini3939 | 0:2e953bbaf3a5 | 518 | * can receive any commands. |
okini3939 | 0:2e953bbaf3a5 | 519 | * On the at45db161D t_RDPD = 35 microseconds. But we will wait 100 |
okini3939 | 0:2e953bbaf3a5 | 520 | * (just to be sure). */ |
okini3939 | 0:2e953bbaf3a5 | 521 | // delay(100); |
okini3939 | 0:2e953bbaf3a5 | 522 | wait_ms(100); |
okini3939 | 0:2e953bbaf3a5 | 523 | } |
LeoHsueh |
6:1872f591d604 | 524 | |
okini3939 | 0:2e953bbaf3a5 | 525 | /** **/ |