Diff: W25Q16BV/W25Q16BV.cpp

Revision:

5:9b240c1d5251

Parent:

4:19a0764d6b81

--- a/W25Q16BV/W25Q16BV.cpp	Fri Nov 13 08:22:27 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,252 +0,0 @@
-// W25Q16BV.cpp
-
-#include"W25Q16BV.h"
-
-// CONSTRUCTOR 
-W25Q16BV::W25Q16BV(PinName mosi, PinName miso, PinName sclk, PinName cs) : _spi(mosi, miso, sclk), _cs(cs) {
-    _spi.format(SPI_NBIT, SPI_MODE);
-    _spi.frequency(SPI_FREQ);
-    chipDisable();
-
-    exitDeepPowerDown();
-    // The SPI Flash cannot safely be accessed the first 1-10 ms after power ON
-//    wait_us(WAIT_US_TPUW);
-}
-
-
-// READING
-int W25Q16BV::readByte(int addr) {
-    chipEnable();
-    _spi.write(R_INST);
-    _spi.write((addr >> 16) & 0xff);
-    _spi.write((addr >>  8) & 0xff);
-    _spi.write((addr      ) & 0xff);
-    int response = _spi.write(DUMMY_ADDR);
-    chipDisable();
-    return response;
-}
-int W25Q16BV::readByte(int a2, int a1, int a0) {
-   chipEnable();
-   _spi.write(R_INST);
-   _spi.write(a2);
-   _spi.write(a1);
-   _spi.write(a0);
-   int response = _spi.write(DUMMY_ADDR);
-    chipDisable();
-    return response;
-}
-void W25Q16BV::readStream(int addr, char* buf, int count) {
-    if (count < 1)
-        return;
-    chipEnable();
-    _spi.write(R_INST);
-    _spi.write((addr >> 16) & 0xff);
-    _spi.write((addr >>  8) & 0xff);
-    _spi.write((addr      ) & 0xff);
-    for (int i = 0; i < count; i++)
-        buf[i] =  _spi.write(DUMMY_ADDR);
-    chipDisable();
-}
-void W25Q16BV::readJEDEC(uint8_t* manId, uint8_t* memType, uint8_t* cap)
-{
-    chipEnable();
-    _spi.write(JDEC_INST);
-    *manId = _spi.write(DUMMY_ADDR);
-    *memType = _spi.write(DUMMY_ADDR);
-    *cap = _spi.write(DUMMY_ADDR);
-    chipDisable();
-}
-uint8_t W25Q16BV::readStatus1()
-{
-  uint8_t status;
-  chipEnable();
-  _spi.write(STATUS1_INST);
-  status = _spi.write(DUMMY_ADDR);
-  chipDisable();
-  return status;
-}
-uint8_t W25Q16BV::readStatus2()
-{
-  uint8_t status;
-  chipEnable();
-  _spi.write(STATUS2_INST);
-  status = _spi.write(DUMMY_ADDR);
-  chipDisable();
-  return status;
-}
-
-// WRITING
-void W25Q16BV::writeByte(int addr, int data) {
-    writeEnable();
-    chipEnable();
-    _spi.write(W_INST);
-    _spi.write((addr >> 16) & 0xff);
-    _spi.write((addr >>  8) & 0xff);
-    _spi.write((addr      ) & 0xff);
-    _spi.write(data);
-    chipDisable();
-    writeDisable();
-//    wait_us(WAIT_US_TBP);
-    waitWhileBusy();
-}
-void W25Q16BV::writeByte(int a2, int a1, int a0, int data) {
-    writeEnable();
-    chipEnable();
-    _spi.write(W_INST);
-    _spi.write(a2);
-    _spi.write(a1);
-    _spi.write(a0);
-    _spi.write(data);
-    chipDisable();
-    writeDisable();
-//    wait_us(WAIT_US_TBP);
-    waitWhileBusy();
-}
-#if 0
-void W25Q16BV::writeStream(int addr, char* buf, int count) {
-    if (count < 1)
-        return;
-    writeEnable();
-    chipEnable();
-    _spi.write(W_INST);
-    _spi.write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
-    _spi.write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
-    _spi.write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
-    for (int i = 0; i < count; i++)
-        _spi.write(buf[i]);
-    chipDisable();
-    writeDisable();
-    wait(WAIT_TIME_MS);
-}
-#else
-void W25Q16BV::writeStream(int addr, char* buf, int count)
-{
-  int left = count;
-  int offset = 0;
-  int len = 0;
-  
-  if (count < 1) {
-    return;
-  }
-    
-  // find length of first page write
-  if ((addr / PAGE_SIZE) != ((addr + count) / PAGE_SIZE)) {
-    //spans across at least one boundary
-    len = PAGE_SIZE - (addr % PAGE_SIZE);
-  } else {
-    // ends inside same page => use normal length
-    len = count % PAGE_SIZE;
-  }
-  
-  //break up large write operation into several page write operations
-  while (left > 0) {
-    writeEnable();
-    chipEnable();
-    _spi.write(W_INST);
-    _spi.write(((addr + offset) >> 16) & 0xff);
-    _spi.write(((addr + offset) >>  8) & 0xff);
-    _spi.write(((addr + offset)      ) & 0xff);
-    for (int i = 0; i < len; i++) {
-      _spi.write(buf[offset + i]);
-    }
-    chipDisable();
-    //writeDisable();
-    
-    offset += len;
-    left -= len;
-    len = (left < PAGE_SIZE) ? left : PAGE_SIZE;
-    
-    //wait_us(WAIT_US_TPP);
-    waitWhileBusy();
-  }
-}
-#endif
-
-//ERASING
-void W25Q16BV::chipErase() {
-    writeEnable();
-    chipEnable();
-    _spi.write(C_ERASE_INST);
-    chipDisable();
-//    writeDisable();
-//    wait_us(WAIT_US_TCE);
-    waitWhileBusy();
-}
-bool W25Q16BV::blockErase(int startBlock, int num) {
-  if ((num < 1) || (startBlock < 0) || ((startBlock+num) > NUM_64KB_BLOCKS)) {
-    return false;
-  }
-  for (int i = 0; i < num; i++) {
-    writeEnable();
-    chipEnable();
-    _spi.write(B_ERASE_INST);
-    _spi.write(startBlock + i);
-    _spi.write(0);
-    _spi.write(0);
-    chipDisable();
-//    writeDisable();
-//    wait_us(WAIT_US_TBE);
-    waitWhileBusy();
-  }
-  return true;
-}
-bool W25Q16BV::sectorErase(int startSector, int num) {
-  if ((num < 1) || (startSector < 0) || ((startSector+num) > NUM_SECTORS)) {
-    return false;
-  }
-  int addr = startSector * SECTOR_SIZE;
-  for (int i = 0; i < num; i++) {
-    writeEnable();
-    chipEnable();
-    _spi.write(S_ERASE_INST);
-    _spi.write((addr >> 16) & 0xff);
-    _spi.write((addr >>  8) & 0xff);
-    _spi.write((addr      ) & 0xff);
-    chipDisable();
-//    writeDisable();
-//    wait_us(WAIT_US_TSE);
-    waitWhileBusy();
-    
-    addr += SECTOR_SIZE;
-  }
-  return true;
-}
-
-// Wakeup from deep power down (default state)
-void W25Q16BV::exitDeepPowerDown() {
-    chipEnable();
-    _spi.write(POWERUP_INST);
-    chipDisable();
-  wait_us(WAIT_US_TRES1);
-}
-
-void W25Q16BV::waitWhileBusy() {
-  uint8_t status = 0;
-  int i = 0;
-
-  do {
-    for (i = 0; i < 0x2000; i++);
-
-    status = readStatus1();
-  }
-  while ((status & STATUS_1_BUSY) != 0);
-}
-
-//ENABLE/DISABLE (private functions)
-void W25Q16BV::writeEnable() {
-    chipEnable();
-    _spi.write(WE_INST);
-    chipDisable();
-}
-void W25Q16BV::writeDisable() {
-    chipEnable();
-    _spi.write(WD_INST);
-    chipDisable();
-}
-void W25Q16BV::chipEnable() {
-    _cs = 0;
-}
-void W25Q16BV::chipDisable() {
-    _cs = 1;
-}
-