Simple test program for the W25X40BV API. The library files can be found in the next column or [[http://mbed.org/users/jyam/libraries/W25X40BV/m73pwt|here]].
Revision 1:78c4315e6114, committed 2012-03-19
- Comitter:
- jyam
- Date:
- Mon Mar 19 14:57:06 2012 +0000
- Parent:
- 0:0da0b91683f8
- Commit message:
- added sequential read and write functionality
Changed in this revision
--- a/W25X40BV.cpp Mon Mar 19 09:55:28 2012 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,90 +0,0 @@ -// W25X40BV.cpp - -#include"W25X40BV.h" - -// CONSTRUCTOR -W25X40BV::W25X40BV(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(); -} - - -// READING -int W25X40BV::read(int addr) { - chipEnable(); - _spi.write(R_INST); - _spi.write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2); - _spi.write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1); - _spi.write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0); - int response = _spi.write(DUMMY_ADDR); - chipDisable(); - return response; -} -int W25X40BV::read(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; -} - - -// WRITING -void W25X40BV::write(int addr, int data) { - 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); - _spi.write(data); - chipDisable(); - writeDisable(); - wait(WAIT_TIME); -} -void W25X40BV::write(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(WAIT_TIME); -} - - -//ERASING -void W25X40BV::chipErase() { - writeEnable(); - chipEnable(); - _spi.write(C_ERASE_INST); - chipDisable(); - writeDisable(); - wait(WAIT_TIME); -} - - -//ENABLE/DISABLE (private functions) -void W25X40BV::writeEnable() { - chipEnable(); - _spi.write(WE_INST); - chipDisable(); -} -void W25X40BV::writeDisable() { - chipEnable(); - _spi.write(WD_INST); - chipDisable(); -} -void W25X40BV::chipEnable() { - _cs = 0; -} -void W25X40BV::chipDisable() { - _cs = 1; -} \ No newline at end of file
--- a/W25X40BV.h Mon Mar 19 09:55:28 2012 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,51 +0,0 @@ -// W25X40BV.h - -#ifndef W25X40BV_H -#define W25X40BV_H - -#include "mbed.h" - -#define SPI_FREQ 1000000 -#define SPI_MODE 0 -#define SPI_NBIT 8 - -#define WE_INST 0x06 -#define WD_INST 0x04 -#define R_INST 0x03 -#define W_INST 0x02 -#define C_ERASE_INST 0x60 - -#define DUMMY_ADDR 0x00 -#define WAIT_TIME 1 - -#define ADDR_BMASK2 0x00ff0000 -#define ADDR_BMASK1 0x0000ff00 -#define ADDR_BMASK0 0x000000ff - -#define ADDR_BSHIFT2 16 -#define ADDR_BSHIFT1 8 -#define ADDR_BSHIFT0 0 - -class W25X40BV { -public: - W25X40BV(PinName mosi, PinName miso, PinName sclk, PinName cs); - - int read(int addr); // takes a 24-bit (3 bytes) address and returns the data (1 byte) at that location - int read(int a2, int a1, int a0); // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0] - - void write(int addr, int data); // takes a 24-bit (3 bytes) address and a byte of data to write at that location - void write(int a2, int a1, int a0, int data); // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0] - - void chipErase(); // erase all data on chip - -private: - void writeEnable(); // write enable - void writeDisable(); // write disable - void chipEnable(); // chip enable - void chipDisable(); // chip disable - - SPI _spi; - DigitalOut _cs; -}; - -#endif \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/W25X40BV.lib Mon Mar 19 14:57:06 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/jyam/code/W25X40BV/#6e3c0b23dc6e
--- a/main.cpp Mon Mar 19 09:55:28 2012 +0000 +++ b/main.cpp Mon Mar 19 14:57:06 2012 +0000 @@ -10,17 +10,24 @@ flash.chipErase(); pc.printf("Erase done\n"); - pc.printf("%d\n", flash.read(0x00,0x00,0x06)); - pc.printf("%d\n", flash.read(0x06)); + pc.printf("%d\n", flash.readByte(0x00,0x00,0x06)); + pc.printf("%d\n", flash.readByte(0x06)); - flash.write(0x0, 0x0, 0x06,'a'); - flash.write(0x11,'b'); + flash.writeByte(0x0, 0x0, 0x06,'a'); + flash.writeByte(0x11,'b'); - pc.printf("%c\n", flash.read(0x06)); - pc.printf("%c\n", flash.read(0x00,0x00,0x06)); + pc.printf("%c\n", flash.readByte(0x06)); + pc.printf("%c\n", flash.readByte(0x00,0x00,0x06)); + + pc.printf("%c\n", flash.readByte(0x11)); + pc.printf("%c\n", flash.readByte(0x00,0x00,0x11)); - pc.printf("%c\n", flash.read(0x11)); - pc.printf("%c\n", flash.read(0x00,0x00,0x11)); + char string[] = "Hello World"; + flash.write(0x168, string, 11); + + char str[11]; + flash.read(0x168, str, 11); + pc.printf("%s\n",str); return 0; }
--- a/mbed.bld Mon Mar 19 09:55:28 2012 +0000 +++ b/mbed.bld Mon Mar 19 14:57:06 2012 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/737756e0b479 +http://mbed.org/users/mbed_official/code/mbed/builds/4c0c40fd0593