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 Mushtakh,
Unfortunately, I don't think we have an example for that flash. You would have to set up the SPI interface yourself using the SPI master driver ideally and implement the functions you need from the device as described in the datasheet. This post and this might give some inspiration.
-Amanda H.
Thanks Amanda, I have already seen that posts. But I am unable to enable write and hence unable to write the data as well. This is my code. Can u please help and let me know what is missing term I am unable to get. I am using nRF SDK v16.0 I am able to set up SPI and also I can read the device ID and Manufacturer ID.
void write_enable()
{
ret_code_t err_code;
uint8_t status_register;
spi_xfer_done = false;
static uint8_t spi_tx_cmd[1];
cs_low();
uint8_t WREN = 0x06;
spi_tx_cmd[0] = WREN;
// nrf_drv_spi_transfer(&spi,(uint8_t const *)spi_tx_cmd,sizeof(spi_tx_cmd),0,0);
err_code = nrf_drv_spi_transfer(&spi,spi_tx_cmd,sizeof(spi_tx_cmd),m_buffer_rx,1);
printf("Write_enable_err_code : %d\n",err_code);
if(err_code == NRF_SUCCESS)
{
printf("WREN Transfer Successful\n");
}
while(spi_xfer_done == false) {}
status_register = read_status_register();
printf("Status after WREN: %d\r\n", status_register);
cs_high();
printf("Flash Write Enable Latch operation successful\n");
}
Hi Mushtakh,
Please elaborate more on what is failing. Could you provide any errors, post log output, the logic trance of the SPI bus,etc.? If you are able to read the device ID and Manufacturer ID, there is nothing wrong with the communication. Most likely you did not read the datasheet of the device properly and missed some essential step, etc.
-Amanda H.
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.
/**
* Copyright (c) 2015 - 2019, Nordic Semiconductor ASA
*
* All rights reserved.
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* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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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.