nrf24le1, memory code space read write failed

[shaun]

hi, i build a test project to test IAP(in system program) function of nrf24le1. the project just did follow things:
1. setup uart;
2. erase page 30
3. write data "0xaa,0x55" to memory code space 0x3c00(page 30);
4. read out data from address 0x3c00, and print it through uart;
some other setting as follows:
1. NUPP=FPCR=0XFF: no page is protecded;
2. when read/write/erase memory code space, pmw is set, otherwise pmw is unset;
3. the project only occupy about 1k memory code space, so 0x03c00 should be able to read/write;
the result is unsatisfied. function involves memory code space will cause the project crash.

pls help. my code as follows:

---

void Init()

while(hal_clk_get_16m_source() != HAL_CLK_XOSC16M){}	// wait until xosc ready
// 32K clock init
hal_clklf_set_source(HAL_CLKLF_RCOSC32K);
while(!(hal_clklf_ready())){}		 // wait until rc32k is ready
IRCON = 0;
disable_interrupt();

---

void HexToAscii(unsigned char original,unsigned char *tempdata)

const unsigned char asctable[17] = "0123456789abcdef";
*tempdata = asctable[original>>4];
*(tempdata+1) = asctable[original & 0x0f];

---

---

void main(void)

unsigned char i=0;
uint8_t tempprintfdata[2];
uint8_t testdata[3];
//void (*JumpToApp)() = 0x086E;
// clock interupt
Init();
P0DIR &= 0xf7;		// p0.3, uart_txd,output
hal_uart_init(UART_BAUD_57K6);
delay_ms(1000);
delay_ms(1000);
EA=1;	
hal_uart_putstring("FPCR=");
HexToAscii(FPCR,tempprintfdata);
hal_uart_putchar(tempprintfdata[0]);
hal_uart_putchar(tempprintfdata[1]);
hal_uart_putstring("\r\n"); 
hal_uart_putstring("PCON=");
HexToAscii(PCON,tempprintfdata);
hal_uart_putchar(tempprintfdata[0]);
hal_uart_putchar(tempprintfdata[1]);
hal_uart_putstring("\r\n");		
PCON |= PMW;
hal_flash_page_erase(30);
hal_flash_byte_write(0x3c00,0x55);
hal_flash_byte_write(0x3c01,0xaa);
hal_flash_bytes_read(0x3c00,testdata,3);
PCON &= ~PMW;	
hal_uart_putstring("0x3c00=");
HexToAscii(testdata[0],tempprintfdata);
hal_uart_putchar(tempprintfdata[0]);
hal_uart_putchar(tempprintfdata[1]);
HexToAscii(testdata[1],tempprintfdata);
hal_uart_putchar(tempprintfdata[0]);
hal_uart_putchar(tempprintfdata[1]);
HexToAscii(testdata[2],tempprintfdata);
hal_uart_putchar(tempprintfdata[0]);
hal_uart_putchar(tempprintfdata[1]);	
hal_uart_putstring("\r\n");
while(1);

---

[shaun]

pmw=0x10;;;

[shaun]

the compiler is keil c51 v9.55. when set memory mode to small, the project works fine ; when set memory mode to large, the project will crash;

[Hung Bui]

@shaun: I don't see any problem with the code. Could you try to simplify the code and test first with only flash reading, then if it works, try to erase and so on ? At which step would the issue occur ?

Here is our test code and it worked fine:

#include <reg24le1.h>

#include "hal_flash.h"
void main()
{
	uint8_t flash_data;
	P0DIR = 0x00; // configure P0 as output
	
	PCON |= 0x10; // setting program memory write mode to access flash
	flash_data=hal_flash_byte_read(0x3E00); // read data at address 0x3E00
	if(flash_data == 0xff) // if it is 0xFF => first time running => write init data 0x06
  {
		flash_data =0x06;	
		hal_flash_byte_write(0x3E00,flash_data);
	//	Flash_ByteWrite(0x3E00,&flash_data,1);  
    }
  else // if it is not 0xFF => init data already written, do an increment and update. 
 	{
		hal_flash_page_erase(31); // erase page 31 (0x3E00 / 512 )
		flash_data++;
		hal_flash_byte_write(0x3E00,flash_data);
	}
	PCON &= ~0x10; // set the program mermory write modt to access RAM
	P0=flash_data; // output the data 
	while (1)
	{
		

	}
}

[shaun]

hi, Hung Bui: try this ,declare "flash_data" as "uint8_t xdata flash_data".

[shaun]

it has been proved ,function "hal_flash_bytes_write"/"hal_flash_byte_read"/"hal_flash_bytes_read" in SDK is only suitable for NVM data read/write. when dealing with code flash . function "hal_flash_bytes_write" will only copy xdata to xdata, or code to code ,can't copy xdata to code or code to xdata.