Macronix Low Power Serial NOR Flash in SPI mode.
Dependents: MX25Rxx35F_Serial_NOR_Flash_Testbench MX25Rxx35F_Serial_NOR_Flash_Testbench Coragem_all_sensors 1_Test_Flash_ADC_RTT
SPI_MX25R.cpp
- Committer:
- alec1
- Date:
- 2015-07-08
- Revision:
- 0:a16ad6f5c788
- Child:
- 1:8403da5975cb
File content as of revision 0:a16ad6f5c788:
/* * SPI_MX25R SPI-Flash Memory * Macronix Low Power Serial Flash Memory * Standard Pin-out */ #include "SPI_MX25R.h" #define CMD_RDSR 0x05 // Read Status Register #define CMD_RDCR 0x15 // Read Configuration Register #define CMD_RDID 0x9F // Read Identification #define CMD_WREN 0x06 // Write Enable #define CMD_WRDI 0x04 // Write Disable #define CMD_WRSR 0x01 // Write Status Register #define CMD_READ 0x03 // Read Data Byte #define CMD_PP 0x02 // Page Program #define CMD_BE 0xD8 // 64KB Block Erase #define CMD_32KBE 0x52 // 32KB Block Erase #define CMD_SE 0x20 // 4KB Sector Erase #define CMD_CE 0xC7 // Chip Erase #define CMD_RSTEN 0x66 // Reset Enable #define CMD_RST 0x99 // Reset #define CMD_RDSFDP 0x5A // Read SFDP #define CMD_FREAD 0x0B // x1 FREAD #define CMD_2READ 0xBB // x2 2READ #define CMD_DREAD 0x3B // x2 DREAD #define CMD_4READ 0xEB // x4 4READ #define CMD_QREAD 0x6B // x4 QREAD #define CMD_PESUS 0xB0 // x4 Program/Erase Suspend #define CMD_PERES 0x30 // x4 Program/Erase Resume #define CMD_DP 0xB9 // Enter Deep Power Down SPI_MX25R::SPI_MX25R(PinName mosi, PinName miso, PinName sclk, PinName cs) : m_spi(mosi, miso, sclk), m_cs(cs) { } SPI_MX25R::~SPI_MX25R() { } void SPI_MX25R::writeEnable(void) { m_cs = 0 ; m_spi.write(CMD_WREN) ; m_cs = 1 ; } void SPI_MX25R::writeDisable(void) { m_cs = 0 ; m_spi.write(CMD_WRDI) ; m_cs = 1 ; } void SPI_MX25R::resetEnable(void) { m_cs = 0 ; m_spi.write(CMD_RSTEN) ; m_cs = 1 ; } void SPI_MX25R::reset(void) { m_cs = 0 ; m_spi.write(CMD_RST) ; m_cs = 1 ; } uint8_t SPI_MX25R::readStatus(void) { uint8_t data ; m_cs = 0 ; m_spi.write(CMD_RDSR) ; data = m_spi.write(CMD_RDSR) ; // dummy m_spi.write(CMD_RDSR) ; data = m_spi.write(CMD_RDSR) ; // dummy m_cs = 1 ; return( data ) ; } uint32_t SPI_MX25R::readConfig(void) { uint8_t data; uint32_t config32 = 0 ; m_cs = 0 ; m_spi.write(CMD_RDCR) ; // send 15h data= m_spi.write(0x55) ; // dumy to get 1st Byte out config32 = config32 | data ; // put in 32b reg data= m_spi.write(0x55) ; //dummy to get 2nd Byte out config32 = (config32 << 8) | data ; // shift and put in reg m_cs = 1 ; return( config32 ) ; } uint32_t SPI_MX25R::readID(void) { uint8_t data; uint32_t data32 = 0 ; m_cs = 0 ; m_spi.write(CMD_RDID) ; // send 9Fh data= m_spi.write(0x55) ; // dumy to get 1st Byte out data32 = data32 | data ; // put in 32b reg data= m_spi.write(CMD_RDID) ; //dummy to get 2nd Byte out data32 = (data32 << 8) | data ; // shift and put in reg data= m_spi.write(0x55) ; //dummy to get 3rd Byte out data32 = (data32 << 8) | data ; // shift again and put in reg m_cs = 1 ; return( data32 ) ; } void SPI_MX25R::programPage(int addr, uint8_t *data, int numData) { int i ; m_cs = 0 ; m_spi.write(CMD_PP) ; // Program Page 02h m_spi.write((addr >> 16)&0xFF) ; // adr 23:16 m_spi.write((addr >> 8)&0xFF) ; // adr 15:8 m_spi.write(addr & 0xFF) ; // adr 7:0 for (i = 0 ; i < numData ; i++ ) { // data = 00, 01, 02, .. to FEh, FFh = all 256 Bytes in 1 page. m_spi.write(data[i]) ; } m_cs = 1 ; // poll in main } void SPI_MX25R::hpmode(void) { m_cs = 0 ; m_spi.write(CMD_WRSR) ; // Write SR cmd 01h m_spi.write(0x00) ; // SR = 00h m_spi.write(0x00) ; // CR1 = 00h m_spi.write(0x02) ; // CR2 = 02h, To set Config Reg 2 <1> = 1 to enter High Performance mode m_cs = 1 ; } void SPI_MX25R::lpmode(void) { m_cs = 0 ; m_spi.write(CMD_WRSR) ; // Write SR cmd 01h m_spi.write(0x00) ; // SR = 00h m_spi.write(0x00) ; // CR1 = 00h m_spi.write(0x00) ; // CR2 = 00h, To set Config Reg 2 <1> = 0 to enter Low Power mode m_cs = 1 ; } void SPI_MX25R::blockErase(int addr) { uint8_t data[3] ; data[0] = (addr >> 16) & 0xFF ; data[1] = (addr >> 8) & 0xFF ; data[2] = (addr & 0xFF) ; m_cs = 0 ; m_spi.write(CMD_BE) ; for (int i = 0 ; i < 3 ; i++ ) { m_spi.write(data[i]) ; } m_cs = 1 ; // poll in main } void SPI_MX25R::blockErase32KB(int addr) { uint8_t data[3] ; data[0] = (addr >> 16) & 0xFF ; data[1] = (addr >> 8) & 0xFF ; data[2] = (addr & 0xFF) ; m_cs = 0 ; m_spi.write(CMD_32KBE) ; for (int i = 0 ; i < 3 ; i++ ) { m_spi.write(data[i]) ; } m_cs = 1 ; // poll in main } void SPI_MX25R::sectorErase(int addr) { uint8_t data[3] ; data[0] = (addr >> 16) & 0xFF ; data[1] = (addr >> 8) & 0xFF ; data[2] = (addr & 0xFF) ; m_cs = 0 ; m_spi.write(CMD_SE) ; for (int i = 0 ; i < 3 ; i++ ) { m_spi.write(data[i]) ; } m_cs = 1 ; // poll in main } void SPI_MX25R::chipErase(void) { m_cs = 0 ; m_spi.write(CMD_CE) ; m_cs = 1 ; // poll in main } uint8_t SPI_MX25R::read8(int addr) { uint8_t data ; m_cs = 0 ; m_spi.write(CMD_READ) ; 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 ) ; } uint32_t SPI_MX25R::rd32(int addr) { uint8_t data; uint32_t data32 = 0 ; m_cs = 0 ; m_spi.write(CMD_READ) ; // send 03h m_spi.write((addr >> 16)&0xFF) ; // address m_spi.write((addr >> 8)&0xFF) ; m_spi.write(addr & 0xFF) ; data= m_spi.write(0xFF) ; // dumy to get 1st Byte out data32 = data32 | data ; // put in 32b reg data= m_spi.write(0xFF) ; //dummy to get 2nd Byte out data32 = (data32 << 8) | data ; // shift and put in reg data= m_spi.write(0xFF) ; //dummy to get 3rd Byte out data32 = (data32 << 8) | data ; // shift again and put in reg data= m_spi.write(0xFF) ; //dummy to get 4th Byte out data32 = (data32 << 8) | data ; // shift again and put in reg m_cs = 1 ; return( data32 ) ; }