SPI Flash memory
Dependents: AT45DB161D SPIFLASH_AT45DB n-bed_AT45DB161E AT45DB161D
at45db161d.cpp@1:b379e16fdf6f, 2011-09-15 (annotated)
- Committer:
- okini3939
- Date:
- Thu Sep 15 15:09:56 2011 +0000
- Revision:
- 1:b379e16fdf6f
- Parent:
- 0:2e953bbaf3a5
SPI Flash memory
AT45DB081D, AT45DB161D, AT45DB321D
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 | */ |
okini3939 | 0:2e953bbaf3a5 | 11 | #include "at45db161d.h" |
okini3939 | 0:2e953bbaf3a5 | 12 | |
okini3939 | 0:2e953bbaf3a5 | 13 | /** CTOR **/ |
okini3939 | 0:2e953bbaf3a5 | 14 | ATD45DB161D::ATD45DB161D(PinName mosi, PinName miso, PinName sclk, PinName cs) |
okini3939 | 0:2e953bbaf3a5 | 15 | : _spi(mosi, miso, sclk), _cs(cs) |
okini3939 | 0:2e953bbaf3a5 | 16 | {} |
okini3939 | 0:2e953bbaf3a5 | 17 | |
okini3939 | 0:2e953bbaf3a5 | 18 | ATD45DB161D::ATD45DB161D(SPI &spi, PinName cs) |
okini3939 | 0:2e953bbaf3a5 | 19 | : _spi(spi), _cs(cs) |
okini3939 | 0:2e953bbaf3a5 | 20 | {} |
okini3939 | 0:2e953bbaf3a5 | 21 | |
okini3939 | 0:2e953bbaf3a5 | 22 | /** DTOR **/ |
okini3939 | 0:2e953bbaf3a5 | 23 | ATD45DB161D::~ATD45DB161D() |
okini3939 | 0:2e953bbaf3a5 | 24 | {} |
okini3939 | 0:2e953bbaf3a5 | 25 | |
okini3939 | 0:2e953bbaf3a5 | 26 | /** Setup SPI and pinout **/ |
okini3939 | 0:2e953bbaf3a5 | 27 | void ATD45DB161D::Init() |
okini3939 | 0:2e953bbaf3a5 | 28 | { |
okini3939 | 0:2e953bbaf3a5 | 29 | // uint8_t clr; |
okini3939 | 0:2e953bbaf3a5 | 30 | |
okini3939 | 0:2e953bbaf3a5 | 31 | /* Initialize pinout */ |
okini3939 | 0:2e953bbaf3a5 | 32 | /* |
okini3939 | 0:2e953bbaf3a5 | 33 | pinMode(DATAOUT, OUTPUT); |
okini3939 | 0:2e953bbaf3a5 | 34 | pinMode(DATAIN, INPUT); |
okini3939 | 0:2e953bbaf3a5 | 35 | pinMode(SPICLOCK, OUTPUT); |
okini3939 | 0:2e953bbaf3a5 | 36 | pinMode(SLAVESELECT, OUTPUT); |
okini3939 | 0:2e953bbaf3a5 | 37 | pinMode(DATAIN, INPUT); |
okini3939 | 0:2e953bbaf3a5 | 38 | */ |
okini3939 | 0:2e953bbaf3a5 | 39 | /* Disable device */ |
okini3939 | 0:2e953bbaf3a5 | 40 | DF_CS_inactive; |
okini3939 | 0:2e953bbaf3a5 | 41 | |
okini3939 | 0:2e953bbaf3a5 | 42 | /* Setup SPI */ |
okini3939 | 0:2e953bbaf3a5 | 43 | // SPCR = (1 << SPE) | (1 << MSTR) | (1 << CPOL) | (1 << CPHA); |
okini3939 | 0:2e953bbaf3a5 | 44 | _spi.format(8, 0); |
okini3939 | 0:2e953bbaf3a5 | 45 | |
okini3939 | 0:2e953bbaf3a5 | 46 | /* Cleanup registers */ |
okini3939 | 0:2e953bbaf3a5 | 47 | // clr = SPSR; |
okini3939 | 0:2e953bbaf3a5 | 48 | // clr = SPDR; |
okini3939 | 0:2e953bbaf3a5 | 49 | } |
okini3939 | 0:2e953bbaf3a5 | 50 | |
okini3939 | 0:2e953bbaf3a5 | 51 | /** |
okini3939 | 0:2e953bbaf3a5 | 52 | * Read status register |
okini3939 | 0:2e953bbaf3a5 | 53 | * @return The content of the status register |
okini3939 | 0:2e953bbaf3a5 | 54 | **/ |
okini3939 | 0:2e953bbaf3a5 | 55 | uint8_t ATD45DB161D::ReadStatusRegister() |
okini3939 | 0:2e953bbaf3a5 | 56 | { |
okini3939 | 0:2e953bbaf3a5 | 57 | uint8_t status; |
okini3939 | 0:2e953bbaf3a5 | 58 | |
okini3939 | 0:2e953bbaf3a5 | 59 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 60 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 61 | |
okini3939 | 0:2e953bbaf3a5 | 62 | /* Send status read command */ |
okini3939 | 0:2e953bbaf3a5 | 63 | spi_transfer(AT45DB161D_STATUS_REGISTER_READ); |
okini3939 | 0:2e953bbaf3a5 | 64 | /* Get result with a dummy write */ |
okini3939 | 0:2e953bbaf3a5 | 65 | status = spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 66 | |
okini3939 | 0:2e953bbaf3a5 | 67 | return status; |
okini3939 | 0:2e953bbaf3a5 | 68 | } |
okini3939 | 0:2e953bbaf3a5 | 69 | |
okini3939 | 0:2e953bbaf3a5 | 70 | /** |
okini3939 | 0:2e953bbaf3a5 | 71 | * Read Manufacturer and Device ID |
okini3939 | 0:2e953bbaf3a5 | 72 | * @note if id.extendedInfoLength is not equal to zero, |
okini3939 | 0:2e953bbaf3a5 | 73 | * successive calls to spi_transfer(0xff) will return |
okini3939 | 0:2e953bbaf3a5 | 74 | * the extended device information string bytes. |
okini3939 | 0:2e953bbaf3a5 | 75 | * @param id Pointer to the ID structure to initialize |
okini3939 | 0:2e953bbaf3a5 | 76 | **/ |
okini3939 | 0:2e953bbaf3a5 | 77 | void ATD45DB161D::ReadManufacturerAndDeviceID(struct ATD45DB161D::ID *id) |
okini3939 | 0:2e953bbaf3a5 | 78 | { |
okini3939 | 0:2e953bbaf3a5 | 79 | |
okini3939 | 0:2e953bbaf3a5 | 80 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 81 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 82 | |
okini3939 | 0:2e953bbaf3a5 | 83 | /* Send status read command */ |
okini3939 | 0:2e953bbaf3a5 | 84 | spi_transfer(AT45DB161D_READ_MANUFACTURER_AND_DEVICE_ID); |
okini3939 | 0:2e953bbaf3a5 | 85 | |
okini3939 | 0:2e953bbaf3a5 | 86 | /* Manufacturer ID */ |
okini3939 | 0:2e953bbaf3a5 | 87 | id->manufacturer = spi_transfer(0xff); |
okini3939 | 0:2e953bbaf3a5 | 88 | /* Device ID (part 1) */ |
okini3939 | 0:2e953bbaf3a5 | 89 | id->device[0] = spi_transfer(0xff); |
okini3939 | 0:2e953bbaf3a5 | 90 | /* Device ID (part 2) */ |
okini3939 | 0:2e953bbaf3a5 | 91 | id->device[1] = spi_transfer(0xff); |
okini3939 | 0:2e953bbaf3a5 | 92 | /* Extended Device Information String Length */ |
okini3939 | 0:2e953bbaf3a5 | 93 | id->extendedInfoLength = spi_transfer(0xff); |
okini3939 | 0:2e953bbaf3a5 | 94 | |
okini3939 | 0:2e953bbaf3a5 | 95 | } |
okini3939 | 0:2e953bbaf3a5 | 96 | |
okini3939 | 0:2e953bbaf3a5 | 97 | /** |
okini3939 | 0:2e953bbaf3a5 | 98 | * Main Memory Page Read. |
okini3939 | 0:2e953bbaf3a5 | 99 | * A main memory page read allows the user to read data directly from |
okini3939 | 0:2e953bbaf3a5 | 100 | * any one of the 4096 pages in the main memory, bypassing both of the |
okini3939 | 0:2e953bbaf3a5 | 101 | * data buffers and leaving the contents of the buffers unchanged. |
okini3939 | 0:2e953bbaf3a5 | 102 | * |
okini3939 | 0:2e953bbaf3a5 | 103 | * @param page Page of the main memory to read |
okini3939 | 0:2e953bbaf3a5 | 104 | * @param offset Starting byte address within the page |
okini3939 | 0:2e953bbaf3a5 | 105 | **/ |
okini3939 | 0:2e953bbaf3a5 | 106 | void ATD45DB161D::ReadMainMemoryPage(uint16_t page, uint16_t offset) |
okini3939 | 0:2e953bbaf3a5 | 107 | { |
okini3939 | 0:2e953bbaf3a5 | 108 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 109 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 110 | |
okini3939 | 0:2e953bbaf3a5 | 111 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 112 | spi_transfer(AT45DB161D_PAGE_READ); |
okini3939 | 0:2e953bbaf3a5 | 113 | |
okini3939 | 0:2e953bbaf3a5 | 114 | /* Address (page | offset) */ |
okini3939 | 0:2e953bbaf3a5 | 115 | spi_transfer((uint8_t)(page >> 6)); |
okini3939 | 0:2e953bbaf3a5 | 116 | spi_transfer((uint8_t)((page << 2) | (offset >> 8))); |
okini3939 | 0:2e953bbaf3a5 | 117 | spi_transfer((uint8_t)(offset & 0xff)); |
okini3939 | 0:2e953bbaf3a5 | 118 | |
okini3939 | 0:2e953bbaf3a5 | 119 | /* 4 "don't care" bytes */ |
okini3939 | 0:2e953bbaf3a5 | 120 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 121 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 122 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 123 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 124 | } |
okini3939 | 0:2e953bbaf3a5 | 125 | |
okini3939 | 0:2e953bbaf3a5 | 126 | /** |
okini3939 | 0:2e953bbaf3a5 | 127 | * Continuous Array Read. |
okini3939 | 0:2e953bbaf3a5 | 128 | * Sequentially read a continuous stream of data. |
okini3939 | 0:2e953bbaf3a5 | 129 | * @param page Page of the main memory where the sequential read will start |
okini3939 | 0:2e953bbaf3a5 | 130 | * @param offset Starting byte address within the page |
okini3939 | 0:2e953bbaf3a5 | 131 | * @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 | 132 | * @note The legacy mode is not currently supported |
okini3939 | 0:2e953bbaf3a5 | 133 | **/ |
okini3939 | 0:2e953bbaf3a5 | 134 | void ATD45DB161D::ContinuousArrayRead(uint16_t page, uint16_t offset, uint8_t low) |
okini3939 | 0:2e953bbaf3a5 | 135 | { |
okini3939 | 0:2e953bbaf3a5 | 136 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 137 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 138 | |
okini3939 | 0:2e953bbaf3a5 | 139 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 140 | spi_transfer( low ? AT45DB161D_CONTINUOUS_READ_LOW_FREQ : |
okini3939 | 0:2e953bbaf3a5 | 141 | AT45DB161D_CONTINUOUS_READ_HIGH_FREQ ); |
okini3939 | 0:2e953bbaf3a5 | 142 | |
okini3939 | 0:2e953bbaf3a5 | 143 | /* Address (page | offset) */ |
okini3939 | 0:2e953bbaf3a5 | 144 | spi_transfer((uint8_t)(page >> 6)); |
okini3939 | 0:2e953bbaf3a5 | 145 | spi_transfer((uint8_t)((page << 2) | (offset >> 8))); |
okini3939 | 0:2e953bbaf3a5 | 146 | spi_transfer((uint8_t)(offset & 0xff)); |
okini3939 | 0:2e953bbaf3a5 | 147 | |
okini3939 | 0:2e953bbaf3a5 | 148 | if (!low) { spi_transfer(0x00); } |
okini3939 | 0:2e953bbaf3a5 | 149 | } |
okini3939 | 0:2e953bbaf3a5 | 150 | |
okini3939 | 0:2e953bbaf3a5 | 151 | |
okini3939 | 0:2e953bbaf3a5 | 152 | /** |
okini3939 | 0:2e953bbaf3a5 | 153 | * Read the content of one of the SRAM data buffers (in low or high speed mode). |
okini3939 | 0:2e953bbaf3a5 | 154 | * @param bufferNum Buffer to read (1 or 2) |
okini3939 | 0:2e953bbaf3a5 | 155 | * @param offset Starting byte within the buffer |
okini3939 | 0:2e953bbaf3a5 | 156 | * @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 | 157 | **/ |
okini3939 | 0:2e953bbaf3a5 | 158 | void ATD45DB161D::BufferRead(uint8_t bufferNum, uint16_t offset, uint8_t low) |
okini3939 | 0:2e953bbaf3a5 | 159 | { |
okini3939 | 0:2e953bbaf3a5 | 160 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 161 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 162 | |
okini3939 | 0:2e953bbaf3a5 | 163 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 164 | if(bufferNum == 1) |
okini3939 | 0:2e953bbaf3a5 | 165 | { |
okini3939 | 0:2e953bbaf3a5 | 166 | spi_transfer(low ? AT45DB161D_BUFFER_1_READ_LOW_FREQ : |
okini3939 | 0:2e953bbaf3a5 | 167 | AT45DB161D_BUFFER_1_READ); |
okini3939 | 0:2e953bbaf3a5 | 168 | } |
okini3939 | 0:2e953bbaf3a5 | 169 | else |
okini3939 | 0:2e953bbaf3a5 | 170 | { |
okini3939 | 0:2e953bbaf3a5 | 171 | spi_transfer(low ? AT45DB161D_BUFFER_2_READ_LOW_FREQ : |
okini3939 | 0:2e953bbaf3a5 | 172 | AT45DB161D_BUFFER_2_READ); |
okini3939 | 0:2e953bbaf3a5 | 173 | |
okini3939 | 0:2e953bbaf3a5 | 174 | } |
okini3939 | 0:2e953bbaf3a5 | 175 | |
okini3939 | 0:2e953bbaf3a5 | 176 | /* 14 "Don't care" bits */ |
okini3939 | 0:2e953bbaf3a5 | 177 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 178 | /* Rest of the "don't care" bits + bits 8,9 of the offset */ |
okini3939 | 0:2e953bbaf3a5 | 179 | spi_transfer((uint8_t)(offset >> 8)); |
okini3939 | 0:2e953bbaf3a5 | 180 | /* bits 7-0 of the offset */ |
okini3939 | 0:2e953bbaf3a5 | 181 | spi_transfer((uint8_t)(offset & 0xff)); |
okini3939 | 0:2e953bbaf3a5 | 182 | } |
okini3939 | 0:2e953bbaf3a5 | 183 | |
okini3939 | 0:2e953bbaf3a5 | 184 | /** |
okini3939 | 0:2e953bbaf3a5 | 185 | * Write data to one of the SRAM data buffers. Any further call to |
okini3939 | 0:2e953bbaf3a5 | 186 | * spi_tranfer will return bytes contained in the data buffer until |
okini3939 | 0:2e953bbaf3a5 | 187 | * a low-to-high transition is detected on the CS pin. If the end of |
okini3939 | 0:2e953bbaf3a5 | 188 | * the data buffer is reached, the device will wrap around back to the |
okini3939 | 0:2e953bbaf3a5 | 189 | * beginning of the buffer. |
okini3939 | 0:2e953bbaf3a5 | 190 | * @param bufferNum Buffer to read (1 or 2) |
okini3939 | 0:2e953bbaf3a5 | 191 | * @param offset Starting byte within the buffer |
okini3939 | 0:2e953bbaf3a5 | 192 | **/ |
okini3939 | 0:2e953bbaf3a5 | 193 | void ATD45DB161D::BufferWrite(uint8_t bufferNum, uint16_t offset) |
okini3939 | 0:2e953bbaf3a5 | 194 | { |
okini3939 | 0:2e953bbaf3a5 | 195 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 196 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 197 | |
okini3939 | 0:2e953bbaf3a5 | 198 | spi_transfer( (bufferNum == 1) ? AT45DB161D_BUFFER_1_WRITE : |
okini3939 | 0:2e953bbaf3a5 | 199 | AT45DB161D_BUFFER_2_WRITE); |
okini3939 | 0:2e953bbaf3a5 | 200 | |
okini3939 | 0:2e953bbaf3a5 | 201 | /* 14 "Don't care" bits */ |
okini3939 | 0:2e953bbaf3a5 | 202 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 203 | /* Rest of the "don't care" bits + bits 8,9 of the offset */ |
okini3939 | 0:2e953bbaf3a5 | 204 | spi_transfer((uint8_t)(offset >> 8)); |
okini3939 | 0:2e953bbaf3a5 | 205 | /* bits 7-0 of the offset */ |
okini3939 | 0:2e953bbaf3a5 | 206 | spi_transfer((uint8_t)(offset & 0xff)); |
okini3939 | 0:2e953bbaf3a5 | 207 | } |
okini3939 | 0:2e953bbaf3a5 | 208 | |
okini3939 | 0:2e953bbaf3a5 | 209 | /** |
okini3939 | 0:2e953bbaf3a5 | 210 | * Transfer data from buffer 1 or 2 to main memory page. |
okini3939 | 0:2e953bbaf3a5 | 211 | * @param bufferNum Buffer to use (1 or 2) |
okini3939 | 0:2e953bbaf3a5 | 212 | * @param page Page where the content of the buffer will transfered |
okini3939 | 0:2e953bbaf3a5 | 213 | * @param erase If set the page will be first erased before the buffer transfer. |
okini3939 | 0:2e953bbaf3a5 | 214 | * @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 | 215 | **/ |
okini3939 | 0:2e953bbaf3a5 | 216 | void ATD45DB161D::BufferToPage(uint8_t bufferNum, uint16_t page, uint8_t erase) |
okini3939 | 0:2e953bbaf3a5 | 217 | { |
okini3939 | 0:2e953bbaf3a5 | 218 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 219 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 220 | |
okini3939 | 0:2e953bbaf3a5 | 221 | /* Opcode */ |
okini3939 | 0:2e953bbaf3a5 | 222 | if(erase) |
okini3939 | 0:2e953bbaf3a5 | 223 | { |
okini3939 | 0:2e953bbaf3a5 | 224 | spi_transfer( (bufferNum == 1) ? AT45DB161D_BUFFER_1_TO_PAGE_WITH_ERASE : |
okini3939 | 0:2e953bbaf3a5 | 225 | AT45DB161D_BUFFER_2_TO_PAGE_WITH_ERASE); |
okini3939 | 0:2e953bbaf3a5 | 226 | } |
okini3939 | 0:2e953bbaf3a5 | 227 | else |
okini3939 | 0:2e953bbaf3a5 | 228 | { |
okini3939 | 0:2e953bbaf3a5 | 229 | spi_transfer( (bufferNum == 1) ? AT45DB161D_BUFFER_1_TO_PAGE_WITHOUT_ERASE : |
okini3939 | 0:2e953bbaf3a5 | 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 | */ |
okini3939 | 0:2e953bbaf3a5 | 240 | spi_transfer((uint8_t)(page >> 6)); |
okini3939 | 0:2e953bbaf3a5 | 241 | spi_transfer((uint8_t)(page << 2)); |
okini3939 | 0:2e953bbaf3a5 | 242 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 243 | |
okini3939 | 0:2e953bbaf3a5 | 244 | DF_CS_inactive; /* Start transfer */ |
okini3939 | 0:2e953bbaf3a5 | 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 */ |
okini3939 | 0:2e953bbaf3a5 | 248 | while(!(ReadStatusRegister() & READY_BUSY)) |
okini3939 | 0:2e953bbaf3a5 | 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 | **/ |
okini3939 | 0:2e953bbaf3a5 | 257 | void ATD45DB161D::PageToBuffer(uint16_t page, uint8_t bufferNum) |
okini3939 | 0:2e953bbaf3a5 | 258 | { |
okini3939 | 0:2e953bbaf3a5 | 259 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 260 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 261 | |
okini3939 | 0:2e953bbaf3a5 | 262 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 263 | spi_transfer((bufferNum == 1) ? AT45DB161D_TRANSFER_PAGE_TO_BUFFER_1 : |
okini3939 | 0:2e953bbaf3a5 | 264 | AT45DB161D_TRANSFER_PAGE_TO_BUFFER_2); |
okini3939 | 0:2e953bbaf3a5 | 265 | |
okini3939 | 0:2e953bbaf3a5 | 266 | /* |
okini3939 | 0:2e953bbaf3a5 | 267 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 268 | * - 2 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 269 | * - 12 page address bits (PA11 - PA0) that specify the page in |
okini3939 | 0:2e953bbaf3a5 | 270 | * the main memory to be written |
okini3939 | 0:2e953bbaf3a5 | 271 | * - 10 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 272 | */ |
okini3939 | 0:2e953bbaf3a5 | 273 | spi_transfer((uint8_t)(page >> 6)); |
okini3939 | 0:2e953bbaf3a5 | 274 | spi_transfer((uint8_t)(page << 2)); |
okini3939 | 0:2e953bbaf3a5 | 275 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 276 | |
okini3939 | 0:2e953bbaf3a5 | 277 | DF_CS_inactive; /* Start page transfer */ |
okini3939 | 0:2e953bbaf3a5 | 278 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 279 | |
okini3939 | 0:2e953bbaf3a5 | 280 | /* Wait for the end of the transfer */ |
okini3939 | 0:2e953bbaf3a5 | 281 | while(!(ReadStatusRegister() & READY_BUSY)) |
okini3939 | 0:2e953bbaf3a5 | 282 | {} |
okini3939 | 0:2e953bbaf3a5 | 283 | } |
okini3939 | 0:2e953bbaf3a5 | 284 | |
okini3939 | 0:2e953bbaf3a5 | 285 | /** |
okini3939 | 0:2e953bbaf3a5 | 286 | * Erase a page in the main memory array. |
okini3939 | 0:2e953bbaf3a5 | 287 | * @param page Page to erase |
okini3939 | 0:2e953bbaf3a5 | 288 | **/ |
okini3939 | 0:2e953bbaf3a5 | 289 | void ATD45DB161D::PageErase(uint16_t page) |
okini3939 | 0:2e953bbaf3a5 | 290 | { |
okini3939 | 0:2e953bbaf3a5 | 291 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 292 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 293 | |
okini3939 | 0:2e953bbaf3a5 | 294 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 295 | spi_transfer(AT45DB161D_PAGE_ERASE); |
okini3939 | 0:2e953bbaf3a5 | 296 | |
okini3939 | 0:2e953bbaf3a5 | 297 | /* |
okini3939 | 0:2e953bbaf3a5 | 298 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 299 | * - 2 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 300 | * - 12 page address bits (PA11 - PA0) that specify the page in |
okini3939 | 0:2e953bbaf3a5 | 301 | * the main memory to be written |
okini3939 | 0:2e953bbaf3a5 | 302 | * - 10 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 303 | */ |
okini3939 | 0:2e953bbaf3a5 | 304 | spi_transfer((uint8_t)(page >> 6)); |
okini3939 | 0:2e953bbaf3a5 | 305 | spi_transfer((uint8_t)(page << 2)); |
okini3939 | 0:2e953bbaf3a5 | 306 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 307 | |
okini3939 | 0:2e953bbaf3a5 | 308 | DF_CS_inactive; /* Start block erase */ |
okini3939 | 0:2e953bbaf3a5 | 309 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 310 | |
okini3939 | 0:2e953bbaf3a5 | 311 | /* Wait for the end of the block erase operation */ |
okini3939 | 0:2e953bbaf3a5 | 312 | while(!(ReadStatusRegister() & READY_BUSY)) |
okini3939 | 0:2e953bbaf3a5 | 313 | {} |
okini3939 | 0:2e953bbaf3a5 | 314 | } |
okini3939 | 0:2e953bbaf3a5 | 315 | |
okini3939 | 0:2e953bbaf3a5 | 316 | /** |
okini3939 | 0:2e953bbaf3a5 | 317 | * Erase a block of eight pages at one time. |
okini3939 | 0:2e953bbaf3a5 | 318 | * @param block Index of the block to erase |
okini3939 | 0:2e953bbaf3a5 | 319 | **/ |
okini3939 | 0:2e953bbaf3a5 | 320 | void ATD45DB161D::BlockErase(uint16_t block) |
okini3939 | 0:2e953bbaf3a5 | 321 | { |
okini3939 | 0:2e953bbaf3a5 | 322 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 323 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 324 | |
okini3939 | 0:2e953bbaf3a5 | 325 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 326 | spi_transfer(AT45DB161D_BLOCK_ERASE); |
okini3939 | 0:2e953bbaf3a5 | 327 | |
okini3939 | 0:2e953bbaf3a5 | 328 | /* |
okini3939 | 0:2e953bbaf3a5 | 329 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 330 | * - 2 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 331 | * - 9 block address bits (PA11 - PA3) |
okini3939 | 0:2e953bbaf3a5 | 332 | * - 13 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 333 | */ |
okini3939 | 0:2e953bbaf3a5 | 334 | spi_transfer((uint8_t)(block >> 3)); |
okini3939 | 0:2e953bbaf3a5 | 335 | spi_transfer((uint8_t)(block << 5)); |
okini3939 | 0:2e953bbaf3a5 | 336 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 337 | |
okini3939 | 0:2e953bbaf3a5 | 338 | DF_CS_inactive; /* Start block erase */ |
okini3939 | 0:2e953bbaf3a5 | 339 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 340 | |
okini3939 | 0:2e953bbaf3a5 | 341 | /* Wait for the end of the block erase operation */ |
okini3939 | 0:2e953bbaf3a5 | 342 | while(!(ReadStatusRegister() & READY_BUSY)) |
okini3939 | 0:2e953bbaf3a5 | 343 | {} |
okini3939 | 0:2e953bbaf3a5 | 344 | } |
okini3939 | 0:2e953bbaf3a5 | 345 | |
okini3939 | 0:2e953bbaf3a5 | 346 | /** |
okini3939 | 0:2e953bbaf3a5 | 347 | * Erase a sector in main memory. There are 16 sector on the |
okini3939 | 0:2e953bbaf3a5 | 348 | * at45db161d and only one can be erased at one time. |
okini3939 | 0:2e953bbaf3a5 | 349 | * @param sector Sector to erase (1-15) |
okini3939 | 0:2e953bbaf3a5 | 350 | **/ |
okini3939 | 0:2e953bbaf3a5 | 351 | void ATD45DB161D::SectoreErase(uint8_t sector) |
okini3939 | 0:2e953bbaf3a5 | 352 | { |
okini3939 | 0:2e953bbaf3a5 | 353 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 354 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 355 | |
okini3939 | 0:2e953bbaf3a5 | 356 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 357 | spi_transfer(AT45DB161D_SECTOR_ERASE); |
okini3939 | 0:2e953bbaf3a5 | 358 | |
okini3939 | 0:2e953bbaf3a5 | 359 | /* |
okini3939 | 0:2e953bbaf3a5 | 360 | * 3 address bytes consist of : |
okini3939 | 0:2e953bbaf3a5 | 361 | */ |
okini3939 | 0:2e953bbaf3a5 | 362 | if((sector == 0x0a) || (sector == 0x0b)) |
okini3939 | 0:2e953bbaf3a5 | 363 | { |
okini3939 | 0:2e953bbaf3a5 | 364 | /* |
okini3939 | 0:2e953bbaf3a5 | 365 | * - 11 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 366 | * - |
okini3939 | 0:2e953bbaf3a5 | 367 | * - 12 don�ft care bits |
okini3939 | 0:2e953bbaf3a5 | 368 | */ |
okini3939 | 0:2e953bbaf3a5 | 369 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 370 | spi_transfer(((sector & 0x01) << 4)); |
okini3939 | 0:2e953bbaf3a5 | 371 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 372 | } |
okini3939 | 0:2e953bbaf3a5 | 373 | else |
okini3939 | 0:2e953bbaf3a5 | 374 | { |
okini3939 | 0:2e953bbaf3a5 | 375 | /* |
okini3939 | 0:2e953bbaf3a5 | 376 | * - 2 don't care bits |
okini3939 | 0:2e953bbaf3a5 | 377 | * - 4 sector number bits |
okini3939 | 0:2e953bbaf3a5 | 378 | * - 18 don't care bits |
okini3939 | 0:2e953bbaf3a5 | 379 | */ |
okini3939 | 0:2e953bbaf3a5 | 380 | spi_transfer(sector << 1); |
okini3939 | 0:2e953bbaf3a5 | 381 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 382 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 383 | } |
okini3939 | 0:2e953bbaf3a5 | 384 | |
okini3939 | 0:2e953bbaf3a5 | 385 | DF_CS_inactive; /* Start block erase */ |
okini3939 | 0:2e953bbaf3a5 | 386 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 387 | |
okini3939 | 0:2e953bbaf3a5 | 388 | /* Wait for the end of the block erase operation */ |
okini3939 | 0:2e953bbaf3a5 | 389 | while(!(ReadStatusRegister() & READY_BUSY)) |
okini3939 | 0:2e953bbaf3a5 | 390 | {} |
okini3939 | 0:2e953bbaf3a5 | 391 | } |
okini3939 | 0:2e953bbaf3a5 | 392 | |
okini3939 | 0:2e953bbaf3a5 | 393 | /** |
okini3939 | 0:2e953bbaf3a5 | 394 | * Erase the entire chip memory. Sectors proteced or locked down will |
okini3939 | 0:2e953bbaf3a5 | 395 | * not be erased. |
okini3939 | 0:2e953bbaf3a5 | 396 | **/ |
okini3939 | 0:2e953bbaf3a5 | 397 | void ATD45DB161D::ChipErase() |
okini3939 | 0:2e953bbaf3a5 | 398 | { |
okini3939 | 0:2e953bbaf3a5 | 399 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 400 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 401 | |
okini3939 | 0:2e953bbaf3a5 | 402 | /* Send chip erase sequence */ |
okini3939 | 0:2e953bbaf3a5 | 403 | spi_transfer(AT45DB161D_CHIP_ERASE_0); |
okini3939 | 0:2e953bbaf3a5 | 404 | spi_transfer(AT45DB161D_CHIP_ERASE_1); |
okini3939 | 0:2e953bbaf3a5 | 405 | spi_transfer(AT45DB161D_CHIP_ERASE_2); |
okini3939 | 0:2e953bbaf3a5 | 406 | spi_transfer(AT45DB161D_CHIP_ERASE_3); |
okini3939 | 0:2e953bbaf3a5 | 407 | |
okini3939 | 0:2e953bbaf3a5 | 408 | DF_CS_inactive; /* Start chip erase */ |
okini3939 | 0:2e953bbaf3a5 | 409 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 410 | |
okini3939 | 0:2e953bbaf3a5 | 411 | /* Wait for the end of the chip erase operation */ |
okini3939 | 0:2e953bbaf3a5 | 412 | while(!(ReadStatusRegister() & READY_BUSY)) |
okini3939 | 0:2e953bbaf3a5 | 413 | {} |
okini3939 | 0:2e953bbaf3a5 | 414 | } |
okini3939 | 0:2e953bbaf3a5 | 415 | |
okini3939 | 0:2e953bbaf3a5 | 416 | /** |
okini3939 | 0:2e953bbaf3a5 | 417 | * This a combination of Buffer Write and Buffer to Page with |
okini3939 | 0:2e953bbaf3a5 | 418 | * Built-in Erase. |
okini3939 | 0:2e953bbaf3a5 | 419 | * @note You must call EndAndWait in order to start transfering data from buffer to page |
okini3939 | 0:2e953bbaf3a5 | 420 | * @param page Page where the content of the buffer will transfered |
okini3939 | 0:2e953bbaf3a5 | 421 | * @param offset Starting byte address within the buffer |
okini3939 | 0:2e953bbaf3a5 | 422 | * @param bufferNum Buffer to use (1 or 2) |
okini3939 | 0:2e953bbaf3a5 | 423 | * @warning UNTESTED |
okini3939 | 0:2e953bbaf3a5 | 424 | **/ |
okini3939 | 0:2e953bbaf3a5 | 425 | void ATD45DB161D::BeginPageWriteThroughBuffer(uint16_t page, uint16_t offset, uint8_t bufferNum) |
okini3939 | 0:2e953bbaf3a5 | 426 | { |
okini3939 | 0:2e953bbaf3a5 | 427 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 428 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 429 | |
okini3939 | 0:2e953bbaf3a5 | 430 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 431 | spi_transfer((bufferNum == 1) ? AT45DB161D_PAGE_THROUGH_BUFFER_1 : |
okini3939 | 0:2e953bbaf3a5 | 432 | AT45DB161D_PAGE_THROUGH_BUFFER_2); |
okini3939 | 0:2e953bbaf3a5 | 433 | |
okini3939 | 0:2e953bbaf3a5 | 434 | /* Address */ |
okini3939 | 0:2e953bbaf3a5 | 435 | spi_transfer((uint8_t)(page >> 6)); |
okini3939 | 0:2e953bbaf3a5 | 436 | spi_transfer((uint8_t)((page << 2) | (offset >> 8))); |
okini3939 | 0:2e953bbaf3a5 | 437 | spi_transfer((uint8_t)offset); |
okini3939 | 0:2e953bbaf3a5 | 438 | } |
okini3939 | 0:2e953bbaf3a5 | 439 | |
okini3939 | 0:2e953bbaf3a5 | 440 | /** |
okini3939 | 0:2e953bbaf3a5 | 441 | * Perform a low-to-high transition on the CS pin and then poll |
okini3939 | 0:2e953bbaf3a5 | 442 | * the status register to check if the dataflash is busy. |
okini3939 | 0:2e953bbaf3a5 | 443 | **/ |
okini3939 | 0:2e953bbaf3a5 | 444 | void ATD45DB161D::EndAndWait() |
okini3939 | 0:2e953bbaf3a5 | 445 | { |
okini3939 | 0:2e953bbaf3a5 | 446 | DF_CS_inactive; /* End current operation */ |
okini3939 | 0:2e953bbaf3a5 | 447 | DF_CS_active; /* Some internal operation may occur |
okini3939 | 0:2e953bbaf3a5 | 448 | * (buffer to page transfer, page erase, etc... ) */ |
okini3939 | 0:2e953bbaf3a5 | 449 | |
okini3939 | 0:2e953bbaf3a5 | 450 | /* Wait for the chip to be ready */ |
okini3939 | 0:2e953bbaf3a5 | 451 | while(!(ReadStatusRegister() & READY_BUSY)) |
okini3939 | 0:2e953bbaf3a5 | 452 | {} |
okini3939 | 0:2e953bbaf3a5 | 453 | |
okini3939 | 0:2e953bbaf3a5 | 454 | DF_CS_inactive; /* Release SPI Bus */ |
okini3939 | 0:2e953bbaf3a5 | 455 | } |
okini3939 | 0:2e953bbaf3a5 | 456 | |
okini3939 | 0:2e953bbaf3a5 | 457 | /** |
okini3939 | 0:2e953bbaf3a5 | 458 | * Compare a page of data in main memory to the data in buffer 1 or 2. |
okini3939 | 0:2e953bbaf3a5 | 459 | * @param page Page to test |
okini3939 | 0:2e953bbaf3a5 | 460 | * @param bufferNum Buffer number |
okini3939 | 0:2e953bbaf3a5 | 461 | * @return |
okini3939 | 0:2e953bbaf3a5 | 462 | * - 1 if the page and the buffer contains the same data |
okini3939 | 0:2e953bbaf3a5 | 463 | * - 0 else |
okini3939 | 0:2e953bbaf3a5 | 464 | * @warning UNTESTED |
okini3939 | 0:2e953bbaf3a5 | 465 | **/ |
okini3939 | 0:2e953bbaf3a5 | 466 | int8_t ATD45DB161D::ComparePageToBuffer(uint16_t page, uint8_t bufferNum) |
okini3939 | 0:2e953bbaf3a5 | 467 | { |
okini3939 | 0:2e953bbaf3a5 | 468 | uint8_t status; |
okini3939 | 0:2e953bbaf3a5 | 469 | |
okini3939 | 0:2e953bbaf3a5 | 470 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 471 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 472 | |
okini3939 | 0:2e953bbaf3a5 | 473 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 474 | spi_transfer((bufferNum == 1) ? AT45DB161D_COMPARE_PAGE_TO_BUFFER_1 : |
okini3939 | 0:2e953bbaf3a5 | 475 | AT45DB161D_COMPARE_PAGE_TO_BUFFER_2); |
okini3939 | 0:2e953bbaf3a5 | 476 | |
okini3939 | 0:2e953bbaf3a5 | 477 | /* Page address */ |
okini3939 | 0:2e953bbaf3a5 | 478 | spi_transfer((uint8_t)(page >> 6)); |
okini3939 | 0:2e953bbaf3a5 | 479 | spi_transfer((uint8_t)(page << 2)); |
okini3939 | 0:2e953bbaf3a5 | 480 | spi_transfer(0x00); |
okini3939 | 0:2e953bbaf3a5 | 481 | |
okini3939 | 0:2e953bbaf3a5 | 482 | DF_CS_inactive; /* Start comparaison */ |
okini3939 | 0:2e953bbaf3a5 | 483 | DF_CS_active; |
okini3939 | 0:2e953bbaf3a5 | 484 | |
okini3939 | 0:2e953bbaf3a5 | 485 | /* Wait for the end of the comparaison and get the result */ |
okini3939 | 0:2e953bbaf3a5 | 486 | while(!((status = ReadStatusRegister()) & READY_BUSY)) |
okini3939 | 0:2e953bbaf3a5 | 487 | {} |
okini3939 | 0:2e953bbaf3a5 | 488 | |
okini3939 | 0:2e953bbaf3a5 | 489 | // return ((status & COMPARE) == COMPARE); |
okini3939 | 0:2e953bbaf3a5 | 490 | return ((status & COMPARE) ? 0 : 1); |
okini3939 | 0:2e953bbaf3a5 | 491 | } |
okini3939 | 0:2e953bbaf3a5 | 492 | |
okini3939 | 0:2e953bbaf3a5 | 493 | /** |
okini3939 | 0:2e953bbaf3a5 | 494 | * Put the device into the lowest power consumption mode. |
okini3939 | 0:2e953bbaf3a5 | 495 | * Once the device has entered the Deep Power-down mode, all |
okini3939 | 0:2e953bbaf3a5 | 496 | * instructions are ignored except the Resume from Deep |
okini3939 | 0:2e953bbaf3a5 | 497 | * Power-down command. |
okini3939 | 0:2e953bbaf3a5 | 498 | * @warning UNTESTED |
okini3939 | 0:2e953bbaf3a5 | 499 | **/ |
okini3939 | 0:2e953bbaf3a5 | 500 | void ATD45DB161D::DeepPowerDown() |
okini3939 | 0:2e953bbaf3a5 | 501 | { |
okini3939 | 0:2e953bbaf3a5 | 502 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 503 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 504 | |
okini3939 | 0:2e953bbaf3a5 | 505 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 506 | spi_transfer(AT45DB161D_DEEP_POWER_DOWN); |
okini3939 | 0:2e953bbaf3a5 | 507 | |
okini3939 | 0:2e953bbaf3a5 | 508 | /* Enter Deep Power-Down mode */ |
okini3939 | 0:2e953bbaf3a5 | 509 | DF_CS_inactive; |
okini3939 | 0:2e953bbaf3a5 | 510 | |
okini3939 | 0:2e953bbaf3a5 | 511 | /* Safety delay */ |
okini3939 | 0:2e953bbaf3a5 | 512 | // delay(100); |
okini3939 | 0:2e953bbaf3a5 | 513 | wait_ms(100); |
okini3939 | 0:2e953bbaf3a5 | 514 | } |
okini3939 | 0:2e953bbaf3a5 | 515 | |
okini3939 | 0:2e953bbaf3a5 | 516 | /** |
okini3939 | 0:2e953bbaf3a5 | 517 | * Takes the device out of Deep Power-down mode. |
okini3939 | 0:2e953bbaf3a5 | 518 | **/ |
okini3939 | 0:2e953bbaf3a5 | 519 | void ATD45DB161D::ResumeFromDeepPowerDown() |
okini3939 | 0:2e953bbaf3a5 | 520 | { |
okini3939 | 0:2e953bbaf3a5 | 521 | DF_CS_inactive; /* Make sure to toggle CS signal in order */ |
okini3939 | 0:2e953bbaf3a5 | 522 | DF_CS_active; /* to reset Dataflash command decoder */ |
okini3939 | 0:2e953bbaf3a5 | 523 | |
okini3939 | 0:2e953bbaf3a5 | 524 | /* Send opcode */ |
okini3939 | 0:2e953bbaf3a5 | 525 | spi_transfer(AT45DB161D_RESUME_FROM_DEEP_POWER_DOWN); |
okini3939 | 0:2e953bbaf3a5 | 526 | |
okini3939 | 0:2e953bbaf3a5 | 527 | /* Resume device */ |
okini3939 | 0:2e953bbaf3a5 | 528 | DF_CS_inactive; |
okini3939 | 0:2e953bbaf3a5 | 529 | |
okini3939 | 0:2e953bbaf3a5 | 530 | /* The CS pin must stay high during t_RDPD microseconds before the device |
okini3939 | 0:2e953bbaf3a5 | 531 | * can receive any commands. |
okini3939 | 0:2e953bbaf3a5 | 532 | * On the at45db161D t_RDPD = 35 microseconds. But we will wait 100 |
okini3939 | 0:2e953bbaf3a5 | 533 | * (just to be sure). */ |
okini3939 | 0:2e953bbaf3a5 | 534 | // delay(100); |
okini3939 | 0:2e953bbaf3a5 | 535 | wait_ms(100); |
okini3939 | 0:2e953bbaf3a5 | 536 | } |
okini3939 | 0:2e953bbaf3a5 | 537 | |
okini3939 | 0:2e953bbaf3a5 | 538 | /** **/ |