Ibrahim Abd Elkader / Mbed 2 deprecated nrflash

Program Nordic nRF24LU1+ chips using SPI.

Dependencies:   mbed

nrflash.cpp@0:f9a5ac1b59f7, 2011-03-13 (annotated)

Committer:
mux
Date:
Sun Mar 13 11:30:09 2011 +0000
Revision:
0:f9a5ac1b59f7
1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mux 0:f9a5ac1b59f7 1 #include <nrflash.h>
mux 0:f9a5ac1b59f7 2 #define WREN (0x06) /*Set flash write enable,FSR.WEN*/
mux 0:f9a5ac1b59f7 3 #define WRDIS (0x04) /*Reset flash write enable, FSR.WEN*/
mux 0:f9a5ac1b59f7 4 #define RDSR (0x05) /*1 (or more) Read Flash Status Register (FSR)*/
mux 0:f9a5ac1b59f7 5 #define WRSR (0x01) /*1 Write Flash Status Register (FSR).*/
mux 0:f9a5ac1b59f7 6 #define READ (0x03) /*Read data from flash*/
mux 0:f9a5ac1b59f7 7 #define PROGRAM (0x02) /*Write data to flash*/
mux 0:f9a5ac1b59f7 8 #define ERASE_PAGE (0x52) /*Erase addressed flash page*/
mux 0:f9a5ac1b59f7 9 #define ERASE_ALL (0x62) /* Erase all pages of flash MainBlock*/
mux 0:f9a5ac1b59f7 10 #define RDFPCR (0x89) /*Read Flash Protect Configuration Register (FPCR)*/
mux 0:f9a5ac1b59f7 11 #define RDISIP (0x84) /*Set flash InfoPage read-back disable*/
mux 0:f9a5ac1b59f7 12 #define RDISMB (0x85) /*Set flash MainBlock read-back disable*/
mux 0:f9a5ac1b59f7 13 #define ENDEBUG (0x86) /*Write 0x00 to InfoPage byte 0x24*/
mux 0:f9a5ac1b59f7 14 #define RDYN (1<<4)
mux 0:f9a5ac1b59f7 15 #define FLASH_LEN (32768)
mux 0:f9a5ac1b59f7 16 NRFlash::NRFlash(PinName mosi, PinName miso, PinName sclk, PinName ssel_, PinName prog_, PinName rst_):
mux 0:f9a5ac1b59f7 17 spi(mosi, miso, sclk),
mux 0:f9a5ac1b59f7 18 ssel(ssel_),
mux 0:f9a5ac1b59f7 19 prog(prog_),
mux 0:f9a5ac1b59f7 20 rst(rst_)
mux 0:f9a5ac1b59f7 21 {
mux 0:f9a5ac1b59f7 22 spi.frequency(12500000);
mux 0:f9a5ac1b59f7 23 spi.format(8, 0);
mux 0:f9a5ac1b59f7 24 rst = 1;
mux 0:f9a5ac1b59f7 25 }
mux 0:f9a5ac1b59f7 26
mux 0:f9a5ac1b59f7 27 void NRFlash::reset()
mux 0:f9a5ac1b59f7 28 {
mux 0:f9a5ac1b59f7 29 rst = 0;
mux 0:f9a5ac1b59f7 30 wait_ms(2);
mux 0:f9a5ac1b59f7 31 rst = 1;
mux 0:f9a5ac1b59f7 32 }
mux 0:f9a5ac1b59f7 33
mux 0:f9a5ac1b59f7 34 void NRFlash::enable_programming()
mux 0:f9a5ac1b59f7 35 {
mux 0:f9a5ac1b59f7 36 prog = 1;
mux 0:f9a5ac1b59f7 37 wait_ms(2);
mux 0:f9a5ac1b59f7 38 }
mux 0:f9a5ac1b59f7 39
mux 0:f9a5ac1b59f7 40 void NRFlash::disable_programming()
mux 0:f9a5ac1b59f7 41 {
mux 0:f9a5ac1b59f7 42 prog = 0;
mux 0:f9a5ac1b59f7 43 }
mux 0:f9a5ac1b59f7 44
mux 0:f9a5ac1b59f7 45 void NRFlash::write_enable()
mux 0:f9a5ac1b59f7 46 {
mux 0:f9a5ac1b59f7 47 ssel = 0;
mux 0:f9a5ac1b59f7 48 spi.write(WREN);
mux 0:f9a5ac1b59f7 49 ssel = 1;
mux 0:f9a5ac1b59f7 50 }
mux 0:f9a5ac1b59f7 51
mux 0:f9a5ac1b59f7 52 int NRFlash::read_fsr()
mux 0:f9a5ac1b59f7 53 {
mux 0:f9a5ac1b59f7 54 int fsr;
mux 0:f9a5ac1b59f7 55 ssel = 0;
mux 0:f9a5ac1b59f7 56 spi.write(RDSR);
mux 0:f9a5ac1b59f7 57 fsr = spi.write(0);
mux 0:f9a5ac1b59f7 58 ssel = 1;
mux 0:f9a5ac1b59f7 59 return fsr;
mux 0:f9a5ac1b59f7 60 }
mux 0:f9a5ac1b59f7 61
mux 0:f9a5ac1b59f7 62 void NRFlash::write_fsr(int fsr)
mux 0:f9a5ac1b59f7 63 {
mux 0:f9a5ac1b59f7 64 ssel = 0;
mux 0:f9a5ac1b59f7 65 spi.write(WRSR);
mux 0:f9a5ac1b59f7 66 spi.write(fsr);
mux 0:f9a5ac1b59f7 67 ssel = 1;
mux 0:f9a5ac1b59f7 68 }
mux 0:f9a5ac1b59f7 69
mux 0:f9a5ac1b59f7 70 void NRFlash::erase_flash()
mux 0:f9a5ac1b59f7 71 {
mux 0:f9a5ac1b59f7 72 write_enable();
mux 0:f9a5ac1b59f7 73 ssel = 0;
mux 0:f9a5ac1b59f7 74 spi.write(ERASE_ALL);
mux 0:f9a5ac1b59f7 75 ssel = 1;
mux 0:f9a5ac1b59f7 76 while (read_fsr() & RDYN); /*wait for flash to be erased*/
mux 0:f9a5ac1b59f7 77 }
mux 0:f9a5ac1b59f7 78
mux 0:f9a5ac1b59f7 79 int NRFlash::read_flash(const char *path)
mux 0:f9a5ac1b59f7 80 {
mux 0:f9a5ac1b59f7 81 int bytes = 0;
mux 0:f9a5ac1b59f7 82 int count = 0;
mux 0:f9a5ac1b59f7 83 char buf[1024];
mux 0:f9a5ac1b59f7 84
mux 0:f9a5ac1b59f7 85 FILE *fp = fopen(path, "wb");
mux 0:f9a5ac1b59f7 86 if (fp == NULL) {
mux 0:f9a5ac1b59f7 87 printf("file not found\n");
mux 0:f9a5ac1b59f7 88 return -1;
mux 0:f9a5ac1b59f7 89 }
mux 0:f9a5ac1b59f7 90 ssel = 0;
mux 0:f9a5ac1b59f7 91 spi.write(READ);
mux 0:f9a5ac1b59f7 92 spi.write(0);
mux 0:f9a5ac1b59f7 93 spi.write(0);
mux 0:f9a5ac1b59f7 94 while (bytes++ < FLASH_LEN) {
mux 0:f9a5ac1b59f7 95 buf[count++] = spi.write(0);
mux 0:f9a5ac1b59f7 96 if (count == sizeof(buf)) {
mux 0:f9a5ac1b59f7 97 count = 0;
mux 0:f9a5ac1b59f7 98 fwrite(buf, 1, sizeof(buf), fp);
mux 0:f9a5ac1b59f7 99 }
mux 0:f9a5ac1b59f7 100 }
mux 0:f9a5ac1b59f7 101 ssel = 1;
mux 0:f9a5ac1b59f7 102 fclose(fp);
mux 0:f9a5ac1b59f7 103 return 0;
mux 0:f9a5ac1b59f7 104 }
mux 0:f9a5ac1b59f7 105
mux 0:f9a5ac1b59f7 106 int NRFlash::write_flash(const char *path)
mux 0:f9a5ac1b59f7 107 {
mux 0:f9a5ac1b59f7 108 int len;
mux 0:f9a5ac1b59f7 109 uint16_t addr = 0;
mux 0:f9a5ac1b59f7 110 char buf[256];
mux 0:f9a5ac1b59f7 111
mux 0:f9a5ac1b59f7 112 FILE *fp = fopen(path, "rb");
mux 0:f9a5ac1b59f7 113 if (fp == NULL) {
mux 0:f9a5ac1b59f7 114 printf("file not found\n");
mux 0:f9a5ac1b59f7 115 return -1;
mux 0:f9a5ac1b59f7 116 }
mux 0:f9a5ac1b59f7 117
mux 0:f9a5ac1b59f7 118 while ((len = fread(buf, 1, sizeof(buf), fp)) > 0) {
mux 0:f9a5ac1b59f7 119 write_enable();
mux 0:f9a5ac1b59f7 120 ssel = 0;
mux 0:f9a5ac1b59f7 121 spi.write(PROGRAM); /*PROGRAM command*/
mux 0:f9a5ac1b59f7 122 spi.write(addr>>8); /*write address MSB*/
mux 0:f9a5ac1b59f7 123 spi.write(addr&0x0F); /*write address LSB*/
mux 0:f9a5ac1b59f7 124 addr += len;
mux 0:f9a5ac1b59f7 125 for (int i=0; i<len; i++) {
mux 0:f9a5ac1b59f7 126 spi.write(buf[i]);
mux 0:f9a5ac1b59f7 127 }
mux 0:f9a5ac1b59f7 128 ssel = 1;
mux 0:f9a5ac1b59f7 129 while (read_fsr() & RDYN); /*wait for flash to be ready*/
mux 0:f9a5ac1b59f7 130 }
mux 0:f9a5ac1b59f7 131 fclose(fp);
mux 0:f9a5ac1b59f7 132 return 0;
mux 0:f9a5ac1b59f7 133 }