Hi,
I am usig nRF5_SDK_15.0.0_a53641 and writing a program with keil.
I am tryng to read data from the acceleration sensor(LSM303DLHC) bu communication with BLENanov2(nRF52832) by TWI and to write the data read into the SD card.
With the fatfs example, the program of writing to the SD card is completed.
However, I tried TWI communication with regerence to twi_sensor example, but I could not write it well.
Could you please tell me if you know how to do twi communication based on fatfs program.
I have attached main.c and sdk_config.h.
Although it is described in the main contents that only Lowbit of the x axis is desplayed for the time being, I want to be able to finally write all the XYZ axes.
Thank you.
/**
* Copyright (c) 2016 - 2018, Nordic Semiconductor ASA
*
* All rights reserved.
*
* 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
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*
* 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
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*
* 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.
*
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*/
/** @file
* @defgroup fatfs_example_main main.c
* @{
* @ingroup fatfs_example
* @brief FATFS Example Application main file.
*
* This file contains the source code for a sample application using FAT filesystem and SD card library.
*
*/
#include "nrf_delay.h"
#include "nrf.h"
#include "bsp.h"
#include "ff.h"
#include "diskio_blkdev.h"
#include "nrf_block_dev_sdc.h"
#include "app_sdcard.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_gpio.h"
#include "nrf_drv_spi.h"
#include "app_error.h"
#include "nrf_assert.h"
#include "pt.h"
#include "nrf_pt.h"
#include <stdio.h>
#include "app_util_platform.h"
#include "nrf_drv_twi.h"
#include "nrf_delay.h"
/*********************************************************************************************
* sensor (I2C)
**********************************************************************************************/
/* TWI instance ID. */
#define TWI_INSTANCE_ID 1
/* Common addresses definition for temperature sensor. */
#define LM75B_ADDR (0x19U >> 1)
//#define LM75B_REG_TEMP 0x00U
//#define LM75B_REG_CONF 0x01U
//#define LM75B_REG_THYST 0x02U
//#define LM75B_REG_TOS 0x03U
#define CTRL_REG1_A 0x20U
#define STATUS_REG_A 0x27U
#define OUT_X_L_A 0x28U
#define OUT_X_H_A 0x29U
#define OUT_Y_L_A 0x30U
#define OUT_Y_H_A 0x31U
#define OUT_Z_L_A 0x32U
#define OUT_Z_H_A 0x33U
/* Mode for LM75B. */
#define NORMAL_MODE 0U
/* Indicates if operation on TWI has ended. */
static volatile bool m_xfer_done = false;
/* TWI instance. */
static const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);
/* Buffer for samples read from temperature sensor. */
static uint8_t m_sample;
/**
* @brief Function for setting active mode on MMA7660 accelerometer.
*/
void LM75B_set_mode(void)
{
ret_code_t err_code;
/* Writing to LM75B_REG_CONF "0" set temperature sensor in NORMAL mode. */
//write 0x27 to 0x20
uint8_t reg[2] = {CTRL_REG1_A,STATUS_REG_A};
err_code = nrf_drv_twi_tx(&m_twi, LM75B_ADDR, reg, sizeof(reg), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
/* Writing to pointer byte. */
reg[0] = OUT_X_L_A;
m_xfer_done = false;
err_code = nrf_drv_twi_tx(&m_twi, LM75B_ADDR, reg, 1, false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
}
/**
* @brief Function for handling data from temperature sensor.
*
* @param[in] temp Temperature in Celsius degrees read from sensor.
*/
__STATIC_INLINE void data_handler(uint8_t temp)
{
NRF_LOG_INFO("Temperature: %d Celsius degrees.", temp);
}
/**
* @brief TWI events handler.
*/
void twi_handler(nrf_drv_twi_evt_t const * p_event, void * p_context)
{
switch (p_event->type)
{
case NRF_DRV_TWI_EVT_DONE:
if (p_event->xfer_desc.type == NRF_DRV_TWI_XFER_RX)
{
data_handler(m_sample);
}
m_xfer_done = true;
break;
default:
break;
}
}
/**
* @brief UART initialization.
*/
void twi_init (void)
{
ret_code_t err_code;
const nrf_drv_twi_config_t twi_lm75b_config = {
.scl = 4,
.sda = 5,
.frequency = NRF_DRV_TWI_FREQ_100K,
.interrupt_priority = APP_IRQ_PRIORITY_HIGH,
.clear_bus_init = false
};
err_code = nrf_drv_twi_init(&m_twi, &twi_lm75b_config, twi_handler, NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_twi_enable(&m_twi);
}
/**
* @brief Function for reading data from temperature sensor.
*/
static void read_sensor_data(uint8_t x1)
{
m_xfer_done = false;
x1 = 0;
/* Read 1 byte from the specified address - skip 3 bits dedicated for fractional part of temperature. */
ret_code_t err_code = nrf_drv_twi_rx(&m_twi, LM75B_ADDR, &m_sample, sizeof(m_sample));
APP_ERROR_CHECK(err_code);
x1 = m_sample;
}
/******************************************************************************************
* SD card (SPI)
********************************************************************************************/
#define FILE_NAME "NORDIC.TXT"
#define TEST_STRING "SD card example."
#define SDC_SCK_PIN 8 ///< SDC serial clock (SCK) pin.
#define SDC_MOSI_PIN 6 ///< SDC serial data in (DI) pin.
#define SDC_MISO_PIN 7 ///< SDC serial data out (DO) pin.
#define SDC_CS_PIN 3 ///< SDC chip select (CS) pin.
/**
* @brief SDC block device definition
* */
NRF_BLOCK_DEV_SDC_DEFINE(
m_block_dev_sdc,
NRF_BLOCK_DEV_SDC_CONFIG(
SDC_SECTOR_SIZE,
APP_SDCARD_CONFIG(SDC_MOSI_PIN, SDC_MISO_PIN, SDC_SCK_PIN, SDC_CS_PIN)
),
NFR_BLOCK_DEV_INFO_CONFIG("Nordic", "SDC", "1.00")//vendor, product, revision
);
/**
* @brief Function for demonstrating FAFTS usage.
*/
static void fatfs_example(uint8_t x1)
{
static FATFS fs;
static DIR dir;
static FILINFO fno;
static FIL file;
uint32_t bytes_written;
FRESULT ff_result;
DSTATUS disk_state = STA_NOINIT;
// Initialize FATFS disk I/O interface by providing the block device.
static diskio_blkdev_t drives[] =
{
DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_sdc, block_dev), NULL)
};
diskio_blockdev_register(drives, ARRAY_SIZE(drives));
NRF_LOG_INFO("Initializing disk 0 (SDC)...");
for (uint32_t retries = 3; retries && disk_state; --retries)
{
disk_state = disk_initialize(0);
}
if (disk_state)
{
NRF_LOG_INFO("Disk initialization failed.");
return;
}
uint32_t blocks_per_mb = (1024uL * 1024uL) / m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_size;
uint32_t capacity = m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_count / blocks_per_mb;
NRF_LOG_INFO("Capacity: %d MB", capacity);
NRF_LOG_INFO("Mounting volume...");
ff_result = f_mount(&fs, "", 1);
if (ff_result)
{
NRF_LOG_INFO("Mount failed.");
return;
}
NRF_LOG_INFO("\r\n Listing directory: /");
ff_result = f_opendir(&dir, "/");
if (ff_result)
{
NRF_LOG_INFO("Directory listing failed!");
return;
}
do
{
ff_result = f_readdir(&dir, &fno);
if (ff_result != FR_OK)
{
NRF_LOG_INFO("Directory read failed.");
return;
}
if (fno.fname[0])
{
if (fno.fattrib & AM_DIR)
{
NRF_LOG_RAW_INFO(" <DIR> %s",(uint32_t)fno.fname);
}
else
{
NRF_LOG_RAW_INFO("%9lu %s", fno.fsize, (uint32_t)fno.fname);
}
}
}
while (fno.fname[0]);
NRF_LOG_RAW_INFO("");
NRF_LOG_INFO("Writing to file " FILE_NAME "...");
ff_result = f_open(&file, FILE_NAME, FA_READ | FA_WRITE | FA_OPEN_APPEND);
if (ff_result != FR_OK)
{
NRF_LOG_INFO("Unable to open or create file: " FILE_NAME ".");
return;
}
ff_result = f_write(&file, &x1, sizeof(x1) , (UINT *) &bytes_written);
if (ff_result != FR_OK)
{
NRF_LOG_INFO("Write failed\r\n.");
}
else
{
NRF_LOG_INFO("%d bytes written.", bytes_written);
}
(void) f_close(&file);
return;
}
/*************************************************************************************
* main
*@brief Function for main application entry.
*************************************************************************************/
int main(void)
{
uint8_t x1;
nrf_gpio_cfg_output(SDC_CS_PIN);//SPI CS LINE
nrf_gpio_pin_set(SDC_CS_PIN);//High to Low
nrf_gpio_pin_clear(SDC_CS_PIN);
bsp_board_init(BSP_INIT_LEDS);
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
NRF_LOG_INFO("FATFS example started.");
twi_init();
LM75B_set_mode();
nrf_gpio_cfg_output(4);//Twi SCL LINE
nrf_gpio_pin_set(4);//High to Low
nrf_gpio_pin_clear(4);
read_sensor_data(x1);
fatfs_example(x1);
while (true)
{
__WFE();
}
}
/** @} */
