Revision 0:f9a5ac1b59f7, committed 2011-03-13

Comitter:

mux

Date:

Sun Mar 13 11:30:09 2011 +0000

Commit message:

1.0

Changed in this revision

diff -r 000000000000 -r f9a5ac1b59f7 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Mar 13 11:30:09 2011 +0000
@@ -0,0 +1,52 @@
+/**
+ * Copyright (c) 2011 Ibrahim Abd Elkader
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * Program Nordic nRF24LU1+ chips using SPI.
+ * Instructions:
+ * 1)convert the ihx to binary using objcopy like this:
+ *   objcopy --gap-fill 255 -Iihex -O binary nrf.ihx nrf.bin
+ * 2)copy nrf.bin to MBED flash
+ * 3)copy nrflash to MBED flash
+ * 4)reset the MBED
+ **/
+#include <nrflash.h> 
+NRFlash nrflash(p11, p12, p13, p14, p15, p16); //mosi, miso, sck, ssel, prog, reset
+LocalFileSystem local("local");
+
+int main() 
+{   
+    nrflash.enable_programming();
+    
+    printf("FSR: %d\n", nrflash.read_fsr());
+    printf("erasing flash...\n");        
+    nrflash.erase_flash();
+        
+    printf("flashing...\n");
+    nrflash.write_flash("/local/nrf.bin");
+    
+    printf("saving flash...\n");
+    nrflash.read_flash("/local/flash.bin"); 
+    printf("all done...\n");
+    
+    nrflash.disable_programming();
+    nrflash.reset();
+    
+    return 0;
+}

diff -r 000000000000 -r f9a5ac1b59f7 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Mar 13 11:30:09 2011 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912

diff -r 000000000000 -r f9a5ac1b59f7 nrflash.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nrflash.cpp	Sun Mar 13 11:30:09 2011 +0000
@@ -0,0 +1,133 @@
+#include <nrflash.h>
+#define WREN        (0x06)    /*Set flash write enable,FSR.WEN*/             
+#define WRDIS       (0x04)    /*Reset flash write enable, FSR.WEN*/             
+#define RDSR        (0x05)    /*1 (or more) Read Flash Status Register (FSR)*/             
+#define WRSR        (0x01)    /*1 Write Flash Status Register (FSR).*/
+#define READ        (0x03)    /*Read data from flash*/                                                   
+#define PROGRAM     (0x02)    /*Write data to flash*/             
+#define ERASE_PAGE  (0x52)    /*Erase addressed flash page*/
+#define ERASE_ALL   (0x62)    /* Erase all pages of flash MainBlock*/
+#define RDFPCR      (0x89)    /*Read Flash Protect Configuration Register (FPCR)*/
+#define RDISIP      (0x84)    /*Set flash InfoPage read-back disable*/
+#define RDISMB      (0x85)    /*Set flash MainBlock read-back disable*/
+#define ENDEBUG     (0x86)    /*Write 0x00 to InfoPage byte 0x24*/
+#define RDYN        (1<<4)
+#define FLASH_LEN   (32768)
+NRFlash::NRFlash(PinName mosi, PinName miso, PinName sclk, PinName ssel_, PinName prog_, PinName rst_):
+spi(mosi, miso, sclk), 
+ssel(ssel_),
+prog(prog_),
+rst(rst_)
+{
+    spi.frequency(12500000);
+    spi.format(8, 0);
+    rst = 1;
+}
+
+void NRFlash::reset()
+{
+    rst = 0;
+    wait_ms(2);
+    rst = 1;
+}
+
+void NRFlash::enable_programming()
+{
+    prog = 1;
+    wait_ms(2);
+}
+
+void NRFlash::disable_programming()
+{
+    prog = 0;   
+}
+
+void NRFlash::write_enable()
+{
+    ssel = 0;
+    spi.write(WREN);
+    ssel = 1;
+}
+
+int NRFlash::read_fsr()
+{
+    int fsr;
+    ssel = 0;
+    spi.write(RDSR);
+    fsr = spi.write(0);
+    ssel = 1;
+    return fsr;
+}
+
+void NRFlash::write_fsr(int fsr)
+{
+    ssel = 0;   
+    spi.write(WRSR);
+    spi.write(fsr);
+    ssel = 1;
+}
+
+void NRFlash::erase_flash()
+{
+    write_enable();
+    ssel = 0;    
+    spi.write(ERASE_ALL);
+    ssel = 1;
+    while (read_fsr() & RDYN); /*wait for flash to be erased*/    
+}
+
+int NRFlash::read_flash(const char *path)
+{
+    int bytes = 0;
+    int count = 0;
+    char buf[1024];
+    
+    FILE *fp = fopen(path, "wb");
+    if (fp == NULL) {
+        printf("file not found\n");
+        return -1;
+    }        
+    ssel = 0;   
+    spi.write(READ);
+    spi.write(0);
+    spi.write(0);
+    while (bytes++ < FLASH_LEN) {
+        buf[count++] = spi.write(0);
+        if (count == sizeof(buf)) {
+            count = 0;
+            fwrite(buf, 1, sizeof(buf), fp);
+        }
+    }
+    ssel = 1;
+    fclose(fp);
+    return 0;
+}
+
+int NRFlash::write_flash(const char *path)
+{
+    int len;
+    uint16_t addr = 0;
+    char buf[256];
+        
+    FILE *fp = fopen(path, "rb");
+    if (fp == NULL) {
+        printf("file not found\n");
+        return -1;
+    }
+       
+    while ((len = fread(buf, 1, sizeof(buf), fp)) > 0) {
+        write_enable();
+        ssel = 0;
+        spi.write(PROGRAM);   /*PROGRAM command*/
+        spi.write(addr>>8);   /*write address MSB*/
+        spi.write(addr&0x0F); /*write address LSB*/    
+        addr += len;
+        for (int i=0; i<len; i++) {
+            spi.write(buf[i]);
+        }        
+        ssel = 1;               
+        while (read_fsr() & RDYN); /*wait for flash to be ready*/
+    }
+    fclose(fp);
+    return 0; 
+}
\ No newline at end of file

diff -r 000000000000 -r f9a5ac1b59f7 nrflash.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nrflash.h	Sun Mar 13 11:30:09 2011 +0000
@@ -0,0 +1,22 @@
+#ifndef __NRFLASH_H__
+#define __NRFLASH_H__
+#include <mbed.h>
+class NRFlash {
+    private:
+        SPI spi;
+        DigitalOut ssel;
+        DigitalOut prog;
+        DigitalOut rst;
+        void write_enable();
+    public:
+        NRFlash(PinName mosi, PinName miso, PinName sclk, PinName ssel, PinName prog, PinName rst);
+        void reset();
+        void enable_programming();
+        void disable_programming();
+        int  read_fsr();
+        void write_fsr(int fsr);
+        void erase_flash();
+        int read_flash(const char *path);
+        int write_flash(const char *path);
+};
+#endif //__NRFLASH_H__
\ No newline at end of file