Revision 0:3f3dd929e3e5, committed 2014-12-25

Comitter:

Rhyme

Date:

Thu Dec 25 00:46:17 2014 +0000

Commit message:

Commit before publish

Changed in this revision

diff -r 000000000000 -r 3f3dd929e3e5 SPI_IS25LQ032B.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI_IS25LQ032B.cpp	Thu Dec 25 00:46:17 2014 +0000
@@ -0,0 +1,134 @@
+/** SPI_IS25LQ032B ISSI 3V - QUAD SERIAL FLASH MEMORY MULTI-I/O SPI
+ * Data Sheet: http://www.issi.com/WW/pdf/25LQ080B-016B-032B.pdf
+ *
+ */
+ 
+#include "SPI_IS25LQ032B.h"
+
+#define CMD_RD      0x03
+#define CMD_FR      0x0B
+#define CMD_FRDIO   0xBB
+#define CMD_FRDO    0x3B
+#define CMD_FRQIO   0xEB
+#define CMD_FRQO    0x6B
+#define CMD_PP      0x02
+#define CMD_PPQ     0x38
+#define CMD_SER     0xD7
+#define CMD_SER2    0x20
+#define CMD_BER32   0x52
+#define CMD_BER64   0xD8
+#define CMD_CER     0xC7
+#define CMD_WREN    0x06
+#define CMD_WRDI    0x04
+#define CMD_RDSR    0x05
+#define CMD_WRSR    0x01
+#define CMD_RDFR    0x48
+#define CMD_WRFR    0x42
+#define CMD_PERSUS  0x75
+#define CMD_PERSUS2 0xB0
+#define CMD_PERRSM  0x7A
+#define CMD_PERRSM2 0x30
+#define CMD_DP      0xB9
+#define CMD_RDID    0xAB
+#define CMD_RDPD    0xAB
+#define CMD_RDUID   0x4B
+#define CMD_RDJDID  0x9F
+#define CMD_RDMDID  0x90
+#define CMD_RDSFDP  0x5A
+#define CMD_RSTEN   0x66
+#define CMD_RST     0x99
+#define CMD_RSTM    0xFF
+#define CMD_IRP     0x62
+#define CMD_IRRD    0x68
+
+SPI_IS25LQ032B::SPI_IS25LQ032B(PinName mosi, PinName miso, PinName sclk, PinName cs) :
+        m_spi(mosi, miso, sclk), m_cs(cs) {
+    // activate the peripheral
+}
+
+SPI_IS25LQ032B::~SPI_IS25LQ032B() { }
+
+void SPI_IS25LQ032B::writeEnable(void)
+{
+    m_cs = 0 ;
+    m_spi.write(CMD_WREN) ;
+    m_cs = 1 ;
+}
+
+void SPI_IS25LQ032B::writeDisable(void)
+{
+    m_cs = 0 ;
+    m_spi.write(CMD_WRDI) ;
+    m_cs = 1 ;
+}    
+
+uint8_t SPI_IS25LQ032B::readStatus(void)
+{   
+    uint8_t data ;
+    m_cs = 0 ;
+    m_spi.write(CMD_RDSR) ;
+    data = m_spi.write(CMD_RDSR) ; // write data is dummy
+    m_cs = 1 ;
+    return( data ) ;
+}
+
+void SPI_IS25LQ032B::writeStatus(uint8_t newStatus)
+{
+    m_cs = 0 ;
+    m_spi.write(CMD_WRSR) ;
+    m_spi.write(newStatus) ;
+    m_cs = 1 ;
+}
+
+uint8_t SPI_IS25LQ032B::readFunc(void) 
+{
+    uint8_t data ;
+    m_cs = 0 ;
+    m_spi.write(CMD_RDFR) ;
+    data  = m_spi.write(CMD_RDFR) ;
+    m_cs = 1 ;
+    return(data) ;
+}
+
+void SPI_IS25LQ032B::writeFunc(uint8_t newValue) 
+{
+    m_cs = 0 ;
+    m_spi.write(CMD_WRFR) ;
+    m_spi.write(newValue) ;
+    m_cs = 1 ;
+}
+
+void SPI_IS25LQ032B::programPage(int addr, uint8_t *data, int numData)
+{
+    int i ;
+    m_cs = 0 ;
+    m_spi.write(CMD_PP) ; // Program Page
+    m_spi.write((addr >> 16)&0xFF) ;
+    m_spi.write((addr >>  8)&0xFF) ;
+    m_spi.write(addr & 0xFF) ;
+    for (i = 0 ; i < numData ; i++ ) {
+        m_spi.write(data[i]) ;
+    }
+    m_cs = 1 ;
+    // you need to check RDSR WIP bit to be 0 to wait completion
+}
+
+void SPI_IS25LQ032B::chipErase(void)
+{
+    m_cs = 0 ;
+    m_spi.write(CMD_CER) ;
+    m_cs = 1 ;
+}
+
+uint8_t SPI_IS25LQ032B::read8(int addr)
+{
+    uint8_t data ;    
+    m_cs = 0 ;
+    m_spi.write(CMD_RD) ;
+    m_spi.write((addr >> 16)&0xFF) ;
+    m_spi.write((addr >>  8)&0xFF) ;
+    m_spi.write(addr & 0xFF) ;
+    data = m_spi.write(addr & 0xFF) ; // write data is dummy 
+    m_cs = 1 ;
+    return( data ) ;
+}

diff -r 000000000000 -r 3f3dd929e3e5 SPI_IS25LQ032B.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI_IS25LQ032B.h	Thu Dec 25 00:46:17 2014 +0000
@@ -0,0 +1,67 @@
+#ifndef _SPI_IS25LQ032B_H_
+#define _SPI_IS25LQ032B_H_
+
+#include "mbed.h"
+
+/** SPI_IS25LQ032B ISSI 3V-QUAD SERIAL FLASH MEMORY MULTI-I/O SPI
+ * Data Sheet: http://www.issi.com/WW/pdf/25LQ080B-016B-032B.pdf
+ */
+
+class SPI_IS25LQ032B 
+{
+public:
+/**
+ * ISSI 3V-QUAD SERIAL FLASH MEMORY MULTI-I/O SPI constructor
+ *
+ * @param mosi SPI_MOSI pin
+ * @param miso SPI_MISO pin
+ * @param sclk SPI_CLK pin
+ * @param cs   SPI_CS  pin
+ */
+ SPI_IS25LQ032B(PinName mosi, PinName miso, PinName sclk, PinName cs) ;
+ 
+/// Destructor
+ ~SPI_IS25LQ032B() ;
+ 
+/// write enable 
+  void writeEnable(void) ;
+  
+/// write disable 
+  void writeDisable(void) ;
+ 
+/// read status register
+  uint8_t readStatus(void) ;
+
+/** write status register
+ *
+ * @param uint8_t newStatus new register value
+ */
+  void writeStatus(uint8_t newStatus) ;
+
+/// read function register
+  uint8_t readFunc(void) ;
+
+/// write fucntion register
+  void writeFunc(uint8_t newValue) ;
+
+/** program page
+ *
+ * @param int addr start address
+ * @param uint8_t *data data buffer address
+ * @param int numData number of data to be written (max 256)
+ */
+  void programPage(int addr, uint8_t *data, int numData) ;
+
+/// chip erase
+  void chipErase(void) ;
+
+  uint8_t read8(int addr) ;
+  void write8(int addr, uint8_t data) ;
+  
+ SPI m_spi;
+ DigitalOut m_cs ;
+ int _mode ;
+ 
+private:
+} ;
+#endif // _SPI_IS25LQ032B_H_
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