Hi,
I am trying to interface External Flash (IS25LP064A ) using SPI example in SDK v16. I am able to read the Manufacturer_ID and the device ID from the external flash. Now I want to Read, write and Erase the flash. But I am unable to do so. Please tell me if any example is there or the way how to do that .
Please give any example code to interface SPI flash.
HI Amanda,
Here is my complete code. and here is the data sheet. http://www.issi.com/WW/pdf/25LP032-64A-B.pdf. I am trying to read and write data to flash. But I am unable to write or read. Also I am unable to set the WEL using WREN command. The only output I am getting after reading a status register or any adress is 0. Please let me know what's the missing things in my code. Please help me with any example code if u have or please let me know what is wrong or missing in my code.
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#include "nrf_drv_spi.h"
#include "app_util_platform.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"
#include "boards.h"
#include "app_error.h"
#include <string.h>
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
/* Flash memory parameters */
#define FLASH_PAGESIZE 256 /* 256 Bytes */ /**< External Flash - Page Size */
#define FLASH_SECTORSIZE (16 * FLASH_PAGESIZE) /* 16 Pages = 4KB */ /**< External Flash - Sector Size */
#define FLASH_BLOCKSIZE (16 * FLASH_SECTORSIZE) /* 16 Sectors = 64KB */ /**< External Flash - Block Size */
#define FLASH_SIZE (128 * FLASH_BLOCKSIZE) /* 128 Blocks = 8MB */ /**< External Flash - Total Memory Size */
#define FLASH_BLOCK32K (32 * 1024) /* 32KB Block */
#define FLASH_PAGESIZE_OFFSET 0x000100
#define REG_SR_BIT_WIP 0
#define READ_WRITE_LENGTH 200
#define SPI_INSTANCE 0 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */
static volatile bool spi_xfer_done; /**< Flag used to indicate that SPI instance completed the transfer. */
#define WAIT_FOR_PERIPH() do { \
while (!m_finished) {} \
m_finished = false; \
} while (0)
#define TEST_STRING "Nordic"
static uint8_t m_tx_buf[] = TEST_STRING; /**< TX buffer. */
static uint8_t m_rx_buf[sizeof(TEST_STRING) + 1]; /**< RX buffer. */
static const uint8_t m_length = sizeof(m_tx_buf); /**< Transfer length. */
static uint8_t m_buffer_rx[256];
static uint8_t m_buffer_tx[256];
void cs_low(void)
{
nrf_gpio_pin_clear(SPI_SS_PIN);
}
void cs_high(void)
{
nrf_gpio_pin_set(SPI_SS_PIN);
}
uint8_t flash_ID_test( uint8_t id )
{
ret_code_t err_code;
static uint8_t instruction[8] = {0};
uint8_t id_read = id;
switch (id_read)
{
case 1:
instruction[0] = 0xAB ;//RDID Command: Read Manufacturer and Product ID
instruction[1] = 0x00;
instruction[2] = 0x00;
instruction[3] = 0x00;
spi_xfer_done = false;
cs_low();
err_code = nrf_drv_spi_transfer(&spi,(uint8_t const *)instruction,sizeof(instruction),m_buffer_rx,7);
if(err_code == NRF_SUCCESS)
{
printf("RDID Transfer Successful\n");
}
printf("Flash_ID_1: %d\n",err_code);
while(spi_xfer_done == false)
{}
printf("\rDevice ID is :");
printf("%02x \n",m_buffer_rx[4]);
cs_high();
break;
case 2:
instruction[0] = 0x90 ;//Read Manufacturer and Device ID
instruction[1]= 0x00;
instruction[2] = 0x00;
instruction[3]= 0x00;
spi_xfer_done = false;
memset(m_buffer_rx,0x00,sizeof(m_buffer_rx));
cs_low();
nrf_drv_spi_transfer(&spi,(uint8_t const *)instruction,sizeof(instruction),m_buffer_rx,8);
if(err_code == NRF_SUCCESS)
{
printf("RDID_2 Transfer Successful\n");
}
while(spi_xfer_done == false)
{}
printf("Flash_ID_2: %d\n",err_code);
cs_high();
// printf("%02x,%02x,%02x,%02x,%02x,%02x\n",m_buffer_rx[0],m_buffer_rx[1],m_buffer_rx[2],m_buffer_rx[3],m_buffer_rx[4],m_buffer_rx[5]);
printf(" Manufacturer_ID: %02x,Device_ID:%02x\n",m_buffer_rx[4],m_buffer_rx[5]);
// printf("%d,%d,%d,%d,%d,%d\n",m_buffer_rx[0],m_buffer_rx[1],m_buffer_rx[2],m_buffer_rx[3],m_buffer_rx[4],m_buffer_rx[5]);
break;
case 3:
m_buffer_tx[0] = 0x9f;//FLASH_CMD_RDID
spi_xfer_done = false;
cs_low();
// nrf_drv_spi_transfer(&spi,(uint8_t const *)m_buffer_tx,1,m_buffer_rx,4);
err_code = nrf_drv_spi_transfer(&spi,m_buffer_tx,1,m_buffer_rx,5);
nrf_delay_ms(2);
if(err_code == NRF_SUCCESS)
{
printf("RDID_3 Transfer Successful\n");
}
while(spi_xfer_done == false){}
printf("Flash_ID_3: %d\n",err_code);
printf("Manufacturer_ID: %02x Memory_Type : %02x, Capacity:%02x\n",m_buffer_rx[1],m_buffer_rx[2],m_buffer_rx[3]);
cs_high();
break;
default:
printf("Out of range");
break;
}
return err_code;
}
void enable_software_request(void)
{
cs_low();
uint8_t rsten = 0x66;
m_buffer_tx[0] = rsten;
nrf_drv_spi_transfer(&spi,(uint8_t const *)m_buffer_tx,1,m_buffer_rx,1);
cs_high();
printf("Flash Enable Software request(RTSEN) Successful\n");
}
void reset_software()
{
cs_low();
uint8_t rst = 0x99;
m_buffer_tx[0] = rst;
nrf_drv_spi_transfer(&spi,(uint8_t const *)m_buffer_tx,1,m_buffer_rx,1);
cs_high();
printf("Flash Software reset successful\n");
}
void disable_write()
{
ret_code_t err_code;
spi_xfer_done = false;
cs_low();
uint8_t wrdi = 0x04;
m_buffer_tx[0] = wrdi;
err_code = nrf_drv_spi_transfer(&spi,(uint8_t const *)m_buffer_tx,1,m_buffer_rx,1);
cs_high();
printf("Flash disable write opearation successful\n");
}
uint8_t read_status_register()
{
ret_code_t err_code;
spi_xfer_done = false;
uint8_t data;
static uint8_t spi_tx_cmd[2];
static uint8_t spi_rx_cmd[2];
uint8_t RDSR =0x05;
cs_low();
spi_tx_cmd[0] = RDSR;
spi_tx_cmd[1] = 0x00;
err_code = nrf_drv_spi_transfer(&spi,(uint8_t const *)spi_tx_cmd,2,spi_rx_cmd,2);
printf("Status_Reg_Err_code : %d\n",err_code);
printf("Rdsr-stat: %02X\n",spi_rx_cmd[0]);
printf("Rdsd stat %02X\n",spi_rx_cmd[1]);
if(err_code == NRF_SUCCESS)
{
printf("RDSR Transfer Successful\n");
}
while(spi_xfer_done == false) {}
cs_high();
return data;
}
void write_enable()
{
ret_code_t err_code;
spi_xfer_done = false;
uint8_t status_register;
uint8_t spi_tx_cmd[1];
cs_low();
uint8_t WREN = 0x06;
spi_tx_cmd[0] = WREN;
err_code = nrf_drv_spi_transfer(&spi,spi_tx_cmd,sizeof(spi_tx_cmd),NULL,0);
printf("Write_enable_err_code : %d\n",err_code);
if(err_code == NRF_SUCCESS)
{
printf("WREN Transfer Successful\n");
}
while(spi_xfer_done == false) {}
// cs_high();
// printf("Flash Write Enable Latch operation successful\n");
}
void write_status_register(uint8_t newStatus)
{
ret_code_t err_code;
spi_xfer_done = false;
uint8_t WRSR = 0x01;
static uint8_t spi_tx_cmd[2];
static uint8_t spi_rx_cmd[2];
cs_low();
spi_tx_cmd[0] = WRSR;
spi_tx_cmd[1] = newStatus;
nrf_drv_spi_transfer(&spi,(uint8_t const *)spi_tx_cmd,2,spi_rx_cmd,1);
if(err_code = NRF_SUCCESS)
{
printf("RDID Transfer Successful\n");
}
while(spi_xfer_done == false) {}
cs_high();
}
uint8_t read_function_register()
{
ret_code_t err_code;
spi_xfer_done = false;
uint8_t data ;
uint8_t RDFR = 0x48;
static uint8_t spi_tx_cmd[2];
static uint8_t spi_rx_cmd[2];
cs_low();
spi_tx_cmd[0] = RDFR;
spi_tx_cmd[1] = 0x00;
err_code = nrf_drv_spi_transfer(&spi,(uint8_t const *)spi_tx_cmd,sizeof(spi_tx_cmd),spi_rx_cmd,sizeof(spi_rx_cmd));
if(err_code = NRF_SUCCESS)
{
printf("RDFR Transfer Successful\n");
}
while(spi_xfer_done == false) {}
cs_high();
// printf("%02x\n",spi_rx_cmd[1]);
// printf("%02x\n",data);
// printf("%02d\n",data);
return data;
}
void write_function_register( uint8_t newValue)
{
ret_code_t err_code;
spi_xfer_done = false;
uint8_t WRFR = 0x42;
static uint8_t spi_tx_cmd[2];
static uint8_t spi_rx_cmd[2];
cs_low();
spi_tx_cmd[0] = WRFR;
spi_tx_cmd[1] = newValue;
err_code = nrf_drv_spi_transfer(&spi,(uint8_t const *)spi_tx_cmd,2,spi_rx_cmd,1);
printf("WRFR Err_code: %d\n",err_code);
if(err_code == NRF_SUCCESS)
{
printf("WRFR Transfer Successful\n");
}
while(spi_xfer_done == false) {}
cs_high();
}
void program_page(uint32_t address, uint8_t *data_ptr, uint32_t data_length)
{
int i=0;
ret_code_t err_code;
uint8_t CMD_PROGRAM = 0x02;
uint8_t spi_tx_cmd[] = {CMD_PROGRAM, (address >> 16) & 0xFF, (address >> 8) & 0xFF, (address >> 0) & 0xFF};
uint8_t spi_rx_cmd[8];
write_enable();
// read_status_register();
cs_low();
spi_xfer_done = false;
err_code = nrf_drv_spi_transfer(&spi, (uint8_t const *)spi_tx_cmd, sizeof(spi_tx_cmd),spi_rx_cmd,1);
if(err_code == NRF_SUCCESS)
{
printf("RDID Transfer Successful\n");
}
while(spi_xfer_done == false) {}
printf("Program_page_Err_2: %d\n",err_code);
while(data_length > 255)
{
spi_xfer_done = false;
err_code = nrf_drv_spi_transfer(&spi,data_ptr,255,0,0);
if(err_code == NRF_SUCCESS)
{
printf("RDID Transfer Successful\n");
}
while(spi_xfer_done == false) {}
printf("Program_page_Err_3: %d\n",err_code);
data_ptr = data_ptr + 255;
data_length = data_length - 255;
}
spi_xfer_done = false;
err_code = nrf_drv_spi_transfer(&spi, data_ptr, data_length,m_buffer_rx,0);
if(err_code == NRF_SUCCESS)
{
printf("RDID Transfer Successful\n");
}
while(spi_xfer_done == false) {}
printf("Program_page_Err_4: %d\n",err_code);
cs_high();
}
void normal_read(uint32_t address, uint8_t * data_ptr, uint32_t data_length)
{
ret_code_t err_code;
uint8_t CMD_READ = 0x03;
uint8_t spi_tx_cmd[] = {CMD_READ, (address >> 16) & 0xFF, (address >> 8) & 0xFF, (address >> 0) & 0xFF};
static uint8_t spi_rx_cmd[256];
spi_xfer_done = false;
cs_low();
// data = nrf_drv_spi_transfer(&spi, spi_tx_cmd, sizeof(spi_tx_cmd), spi_rx_cmd,sizeof(spi_rx_cmd));
err_code = nrf_drv_spi_transfer(&spi, spi_tx_cmd, sizeof(spi_tx_cmd), spi_rx_cmd,4);
if(err_code == NRF_SUCCESS)
{
printf("RDID Transfer Successful\n");
}
while(spi_xfer_done == false) {}
while(data_length > 255)
{
spi_xfer_done = false;
err_code = nrf_drv_spi_transfer(&spi, 0, 0, data_ptr, 255);
if(err_code == NRF_SUCCESS)
{
printf("RDID Transfer Successful\n");
}
while(spi_xfer_done == false) {}
data_ptr += 255;
data_length -= 255;
}
spi_xfer_done = false;
err_code = nrf_drv_spi_transfer(&spi, 0, 0, data_ptr, data_length);
if(err_code == NRF_SUCCESS)
{
printf("RDID Transfer Successful\n");
}
while(spi_xfer_done == false) {}
cs_high();
}
void sector_erase(uint32_t address)
{
uint8_t CMD_SECTOR_ERASE = 0x20;
uint8_t spi_tx_cmd[] = {CMD_SECTOR_ERASE, (address >> 16) & 0xFF, (address >> 8) & 0xFF, (address >> 0) & 0xFF};
cs_low();
write_enable();
uint8_t WREN = 0x06;
uint8_t spi_tx_cmd_1[1];
spi_tx_cmd_1[0] = WREN;
nrf_drv_spi_transfer(&spi,spi_tx_cmd_1,sizeof(spi_tx_cmd_1),0,0); // Enabling Write
nrf_drv_spi_transfer(&spi, spi_tx_cmd, sizeof(spi_tx_cmd), 0, 0);
cs_high();
}
void block_erase(uint32_t address)
{
uint8_t CMD_BLOCK_ERASE = 0xd8;
uint8_t spi_tx_cmd[] = {CMD_BLOCK_ERASE, (address >> 16) & 0xFF, (address >> 8) & 0xFF, (address >> 0) & 0xFF};
write_enable();
cs_low();
nrf_drv_spi_transfer(&spi, spi_tx_cmd, sizeof(spi_tx_cmd), 0, 0);
cs_high();
}
void chip_erase(void)
{
uint8_t CMD_CHIP_ERASE = 0x60;
uint8_t spi_tx_cmd[] = {CMD_CHIP_ERASE};
write_enable();
cs_low();
nrf_drv_spi_transfer(&spi, spi_tx_cmd, sizeof(spi_tx_cmd), 0, 0);
cs_high();
}
/**
* @brief SPI user event handler.
* @param event
*/
void spi_event_handler(nrf_drv_spi_evt_t const * p_event,
void * p_context)
{
spi_xfer_done = true;
NRF_LOG_INFO("Transfer completed.");
if (m_rx_buf[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(m_rx_buf, strlen((const char *)m_rx_buf));
}
}
void flash_spi_init()
{ ret_code_t err_code;
nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.ss_pin = SPI_SS_PIN;
spi_config.miso_pin = SPI_MISO_PIN;
spi_config.mosi_pin = SPI_MOSI_PIN;
spi_config.sck_pin = SPI_SCK_PIN;
spi_config.frequency = NRF_DRV_SPI_FREQ_125K;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
nrf_delay_ms(100);
}
void flash_access_switch()
{
uint8_t man_id, dev_id, status_register, function_register;
uint8_t data_buf[READ_WRITE_LENGTH] ;
char str_buff[50] ="Hello";
char str_read_buff[50] ={0};
uint8_t data_read_buffer[READ_WRITE_LENGTH];
uint32_t address;
uint8_t choice;
address = 0x1000;
uint8_t var =10;
while(1)
{
printf("Enter your choice\n");
printf("1.Flash_ID_test\n2.Read status Register\n3.Read Function register\n4.Normal read\n5. Enable write\n6.Sector erase\n");
printf("7.Program Page\n8.Block Erase\r\n ");
scanf("%d",&choice);
switch(choice)
{
case 1:
flash_ID_test(3);
case 2:
status_register = read_status_register();
printf("Status: %i\r\n", (int)status_register);
break;
case 3:
function_register = read_function_register();
printf("Function: %i\r\n", (int)function_register);
break;
case 4:
normal_read(address, data_read_buffer, 50);
printf("Reading address %.8x: ", address);
for(int i = 0; i < 50; i++)
{
printf("%d\r\n" ,(int)data_read_buffer[i]);
}
printf("\r\n");
break;
case 5:
printf("Running write enable\r\n");
write_enable();
break;
case 6:
printf("Running sector erase at address %8x\r\n",address);
sector_erase(address);
break;
case 7:
for(int i =0; i < 50; i++)
{
data_buf[i] = var;
var++;
}
program_page(address, data_buf,sizeof(data_buf));
printf("Programming data at address %.8X\r\n", address);
break;
case 8:
printf("Erasing block at addres %.8X\r\n",address);
block_erase(address);
break;
} //switch
}//while
} // function
int main(void)
{
//spi_xfer_done = false;
bsp_board_init(BSP_INIT_LEDS);
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
error_info_t err_code;
flash_spi_init();
flash_ID_test(3);
flash_access_switch();
while (1)
{
// Reset rx buffer and transfer done flag
memset(m_rx_buf, 0, m_length);
spi_xfer_done = false;
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length));
while (!spi_xfer_done)
{
__WFE();
}
NRF_LOG_FLUSH();
bsp_board_led_invert(BSP_BOARD_LED_0);
nrf_delay_ms(200);
}
}
Hi,
Mushtakh Shaikh said:I am unable to set the WEL using WREN command.
Did you get any error, out log, or logic trance of the SPI bus for the write_enable()?
Mushtakh Shaikh said:The only output I am getting after reading a status register or any adress is 0.
Could you try to increase the rx_buffer_length to 4 as this suggestion?
-Amanda H.
After write_enable, I am getting the following output.
RDID_3 Transfer Successful
Flash_ID_3: 0
Manufacturer_ID: 9d Memory_Type : 60, Capacity:17
Write_enable_err_code : 0
WREN Transfer Successful
This is the output when after read_status_register();
I have changed the rx_buffer_length to 4 as per your suggestion.Still I am unable to write the data to flash and read the data from flash. Please help me with any code example if u have.
Status_Reg_Err_code : 0
Rdsr-stat: 00
Rdsd stat 00
RDSR Transfer Successful
Hi,
Can u please tell me what went wrong in my code ??
Hi,
Can u please tell me what went wrong in my code ??
Did you change the code to
printf("Rdsr-stat: %02X\n",spi_rx_cmd[2]);
printf("Rdsd stat %02X\n",spi_rx_cmd[3]);
after increasing rx_buffer_length to 4?
-Amanda H.
Yes I did that too. But Still not able to write and read the data to and from the external flash.
Can u please provide any sample code that will help?.
I would suggest using a scope or analyzer on the SPI bus to check.
As I said at first, I don't think we have an example for that flash. You might search other flash cases on DZ for reference.
-Amanda H.