For nRF24LE1 there are 2 options for flash writing which is selected by the PMW bit in PCON:

PMW == 1: Program memory

PMW == 1: NV Data Memory Example:

#include "hal_flash.h"
#define PMW 0x10

PCON |= PMW;

// Writing to the Program Memory
hal_flashbyte_write_byte(0xFA00,0xCD);

PCON &= ~PMW;

// Writing to the NV Data Memory
hal_flashbyte_write_byte(0x2000,0xEF);

Attention:: Flash pages must be erased before they are written to. This is not shown in the example.

See also:: lib_eeprom

Functions
void	hal_flash_page_erase (uint8_t pn)
void	hal_flash_byte_write (uint16_t a, uint8_t b)
void	hal_flash_bytes_write (uint16_t a, const uint8_t *p, uint16_t n)
uint8_t	hal_flash_byte_read (uint16_t a)
void	hal_flash_bytes_read (uint16_t a, uint8_t *p, uint16_t n)
Hardware dependencies
This sections contains hardware specific flash definitions. These definitions are not used inside the Flash HAL directly, but can become handy for the user of the Flash HAL.
#define	HAL_FLASH_PAGE_SIZE 512
#define	HAL_DATA_NV_BASE_ADDRESS 0xFA00
#define	HAL_DATA_NV_FLASH_PAGES 2
#define	HAL_DATA_NV_FLASH_PN0 32
#define	HAL_DATA_NV_FLASH_PN1 33

Define Documentation

#define HAL_FLASH_PAGE_SIZE 512

Number of bytes per Flash page.

Definition at line 32 of file hal_flash_hw.h.

#define HAL_DATA_NV_BASE_ADDRESS 0xFA00

Start (xdata) address for "Non Voltaile Data Memory".

Used by the EEPROM library.

Definition at line 39 of file hal_flash_hw.h.

#define HAL_DATA_NV_FLASH_PAGES 2

Defines the number of physical Flash pages used by one "Non Voltaile Data Memory" page.

Definition at line 45 of file hal_flash_hw.h.

#define HAL_DATA_NV_FLASH_PN0 32

Defines the first physical flash page to which one "Non Voltaile Data Memory" is mapped.

Used by the EEPROM library.

Definition at line 53 of file hal_flash_hw.h.

#define HAL_DATA_NV_FLASH_PN1 33

Defines the second physical flash page to which one "Non Voltaile Data Memory" page is mapped.

Used by the EEPROM library.

Definition at line 61 of file hal_flash_hw.h.

Function Documentation

void hal_flash_page_erase ( uint8_t pn )

Function to erase a page in the Flash memory

Parameters:

pn	Page number

Definition at line 21 of file hal_flash.c.

{ 
  // Save interrupt enable state and disable interrupts:
  F0 = EA;
  EA = 0;

  // Enable flash write operation:
  WEN = 1;
 
  // Write the page address to FCR to start the page erase operation. This
  // operation is "self timed" when executing from the flash; the CPU will
  // halt until the operation is finished:
  FCR = pn;

  // When running from XDATA RAM we need to wait for the operation to finish:
  while(RDYN == 1)
    ;
    
  WEN = 0;
  
  EA = F0; // Restore interrupt enable state  
}

void hal_flash_byte_write	(	uint16_t	a,
		uint8_t	b
	)

Function to write a byte to the Flash memory

Parameters:

a	16 bit address in Flash
b	byte to write

Definition at line 44 of file hal_flash.c.

{
  static uint8_t xdata *pb;
    
  // Save interrupt enable state and disable interrupts:
  F0 = EA;
  EA = 0;
  
  // Enable flash write operation:
  WEN = 1;
  
  // Write the byte directly to the flash. This operation is "self timed" when
  // executing from the flash; the CPU will halt until the operation is
  // finished:
  pb = (uint8_t xdata *)a;
  *pb = b; //lint -e613 "Null pointer ok here"

  // When running from XDATA RAM we need to wait for the operation to finish:
  while(RDYN == 1)
    ;

  WEN = 0;

  EA = F0; // Restore interrupt enable state
}

void hal_flash_bytes_write	(	uint16_t	a,
		const uint8_t *	p,
		uint16_t	n
	)

Function to write n bytes to the Flash memory

Parameters:

a	16 bit address in Flash
*p	pointer to bytes to write
n	number of bytes to write

Definition at line 70 of file hal_flash.c.

{
  static uint8_t xdata *pb;

  // Save interrupt enable state and disable interrupts:
  F0 = EA;
  EA = 0;

  // Enable flash write operation:
  WEN = 1;

  // Write the bytes directly to the flash. This operation is
  // "self timed"; the CPU will halt until the operation is
  // finished:
  pb = (uint8_t xdata *)a;
  while(n--)
  {
    *pb++ = *p++;
    //
    // When running from XDATA RAM we need to wait for the operation to
    // finish:
    while(RDYN == 1)
      ;
  }

  WEN = 0;

  EA = F0; // Restore interrupt enable state
}

uint8_t hal_flash_byte_read ( uint16_t a )

Function to read a byte from the Flash memory

Parameters:

a	16 bit address in Flash

Returns:: the byte read

Definition at line 100 of file hal_flash.c.

{
  uint8_t xdata *pb = (uint8_t xdata *)a;
  return *pb;
}

void hal_flash_bytes_read	(	uint16_t	a,
		uint8_t *	p,
		uint16_t	n
	)

Function to read n bytes from the Flash memory

Parameters:

a	16 bit address in Flash
*p	pointer to bytes to write
n	number of bytes to read

Definition at line 106 of file hal_flash.c.

{  
  uint8_t xdata *pb = (uint8_t xdata *)a;
  while(n--)
  {
    *p = *pb;
    pb++;
    p++;
  }
}

Flash (hal_flash) [nRF24LE1 HAL]

Functions

Hardware dependencies

Define Documentation

Function Documentation

Flash (hal_flash)
[nRF24LE1 HAL]