INTERFACE EXTERNAL 2MB FLASH WITH SPI

[vohra alihussain]

I am working on nrf52832 and sdk11. I want to store my accelerometer and gyroscope data into external memory.Does anyone have code of it? or any one having .c and .h file.

I am using winbond W25Q16JV memory ic.

Any kind of help will be appreciable...

[vohra alihussain]

i am attaching my code, will you suggest what am i doing wrong..

in main i first write and then after some delay i read.memory.h

Fullscreen memory.c Download

#include "memory.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"

#include "nrf_drv_spi.h"

static volatile bool spi_xfer_done;
#define SPI_INSTANCE  0 
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE);  /**< SPI instance. */
void write_register(uint8_t reg)
{uint8_t reg_p[1]={reg};
  nrf_drv_spi_transfer(&spi,reg_p,1, NULL, 0);
  spi_xfer_done = false;
}
void sector_erase()
{ write_enable();
	uint8_t reg_p[4]={SECTOR_E,0x00,0x00,0x00};
  nrf_drv_spi_transfer(&spi,reg_p,4, NULL, 0);
	write_disable();
  spi_xfer_done = false;
}
void write_enable()
{ 
	uint8_t reg_p[1]={W_EN};
	nrf_drv_spi_transfer(&spi,reg_p,1, NULL, 0);
  spi_xfer_done = false;
}
void write_disable()
{
	uint8_t reg_p[1]={W_DE};
  nrf_drv_spi_transfer(&spi,reg_p,1, NULL, 0);
  spi_xfer_done = false;
}
uint8_t read_register(uint8_t reg,uint32_t length)
{uint8_t p_data[1];
 reg = reg | 0x80;
uint8_t reg_p[1]={reg};
nrf_drv_spi_transfer(&spi,reg_p,1, p_data, sizeof(p_data));
//SEGGER_RTT_printf(0,"rx=%x",p_data[0]);
}

uint8_t write_memory(uint8_t *ptr)
{
	
uint8_t test_string_[252+3]={0x00,0x00,0x00};
	
	
/*for(uint8_t i=3;i<131;i++)
{test_string_[i]=i;}*/
sector_erase();
write_enable();
write_register(PAGE_PGM);
uint8_t *temp;
for(uint8_t i = 3; i < (252+3); i++ ) 
{
	temp = (ptr + (i - 3));
	test_string_[i] = *temp;
}
 uint32_t err_code=nrf_drv_spi_transfer(&spi,test_string_, sizeof(test_string_), NULL, 0);
APP_ERROR_CHECK(err_code);
SEGGER_RTT_printf(0,"err_code=%d",err_code);

write_disable();
return 0;
}

uint8_t read_memory()
{
uint8_t p_data[255];
write_enable();


uint8_t test_string_[4]={READ,0x00,0x00,0x00};
nrf_drv_spi_transfer(&spi,test_string_,4,p_data,sizeof(p_data));
for(int i=0;i<=255;i++)
{
SEGGER_RTT_printf(0,"\n%d,%d",i,p_data[i]);
nrf_delay_ms(10);
}
return 0;
}
void read_status_reg()
{
	uint8_t p_data[1];
	uint8_t reg_p[1]={0x80|R_SR1};
	nrf_drv_spi_transfer(&spi,reg_p,1, p_data, sizeof(p_data));
 //SEGGER_RTT_printf(0,"rx=%x",p_data[1]);
}
bool busy()
{
	uint8_t p_data[1];
	uint8_t reg_p[1]={0x80|R_SR1};
	nrf_drv_spi_transfer(&spi,reg_p,1, p_data, sizeof(p_data));
 SEGGER_RTT_printf(0,"rx=%x",p_data[0]);
	if(p_data[0]==1)
	{return 1;}
	else
		return 0;
}
void chip_erase()
{ write_enable();
	uint8_t reg_p[1]={CHIP_ERASE};
	nrf_drv_spi_transfer(&spi,reg_p,1, NULL,0);
	write_disable();
	spi_xfer_done = false;
}
	

[Mannu]

Hey did you get solution. please help me if you already got solution