hello,
I am interfacing NRF52840-DK with MAX30003 ECG Board Using SPI Communication. I am using SDK15.1.0 -Peripheral-SPI example code.
I have working MAX30003 Aurdino code. As per Arduino code, I am making changes in NRF code but I am unable to get any data on SPI_TX and SPI_RX Buffer.
Please let me know:
1) void MAX30003_Reg_Write (unsigned char WRITE_ADDRESS, unsigned long data),
2) void MAX30003_Reg_Read(uint8_t Reg_address)
and
3) void MAX30003_Read_Data(int num_samples)
All are correct or not?
do you have any reference code of "reg write" and "reg read" function code Using SPI?
if you have then please send me for reference.
Please check below files
I have attached both Arduino and NRF Code please check and let m know?
Thanks and Regards,
rohit
#include<SPI.h>
#include <TimerOne.h>
#include "MAX30003.h"
#define MAX30003_CS_PIN 7
#define CLK_PIN 6
volatile char SPI_RX_Buff[5] ;
volatile char *SPI_RX_Buff_Ptr;
int i=0;
unsigned long uintECGraw = 0;
signed long intECGraw=0;
uint8_t DataPacketHeader[20];
uint8_t data_len = 8;
signed long ecgdata;
unsigned long data;
char SPI_temp_32b[4];
char SPI_temp_Burst[100];
// 32KHz clock using timer1
void timerIsr()
{
digitalWrite( CLK_PIN, digitalRead(CLK_PIN ) ^ 1 ); // toggle Digital6 attached to FCLK of MAX30003
}
void setup()
{
Serial.begin(115200); //Serial begin
pinMode(MAX30003_CS_PIN,OUTPUT);
digitalWrite(MAX30003_CS_PIN,HIGH); //disable device
SPI.begin();
SPI.setBitOrder(MSBFIRST);
SPI.setDataMode(SPI_MODE0);
SPI.setClockDivider(SPI_CLOCK_DIV4);
pinMode(CLK_PIN,OUTPUT);
MAX30003_begin(); // initialize MAX30003
}
void loop()
{
MAX30003_Reg_Read(ECG_FIFO);
unsigned long data0 = (unsigned long) (SPI_temp_32b[0]);
data0 = data0 <<24;
unsigned long data1 = (unsigned long) (SPI_temp_32b[1]);
data1 = data1 <<16;
unsigned long data2 = (unsigned long) (SPI_temp_32b[2]);
data2 = data2 >>6;
data2 = data2 & 0x03;
data = (unsigned long) (data0 | data1 | data2);
ecgdata = (signed long) (data);
MAX30003_Reg_Read(RTOR);
unsigned long RTOR_msb = (unsigned long) (SPI_temp_32b[0]);
// RTOR_msb = RTOR_msb <<8;
unsigned char RTOR_lsb = (unsigned char) (SPI_temp_32b[1]);
unsigned long rtor = (RTOR_msb<<8 | RTOR_lsb);
rtor = ((rtor >>2) & 0x3fff) ;
float hr = 60 /((float)rtor*0.008);
unsigned int HR = (unsigned int)hr; // type cast to int
unsigned int RR = (unsigned int)rtor*8 ; //8ms
/*Serial.print(RTOR_msb);
Serial.print(",");
Serial.print(RTOR_lsb);
Serial.print(",");
Serial.print(rtor);
Serial.print(",");
Serial.print(rr);
Serial.print(",");
Serial.println(hr); */
DataPacketHeader[0] = 0x0A;
DataPacketHeader[1] = 0xFA;
DataPacketHeader[2] = 0x0C;
DataPacketHeader[3] = 0;
DataPacketHeader[4] = 0x02;
DataPacketHeader[5] = ecgdata;
DataPacketHeader[6] = ecgdata>>8;
DataPacketHeader[7] = ecgdata>>16;
DataPacketHeader[8] = ecgdata>>24;
DataPacketHeader[9] = RR ;
DataPacketHeader[10] = RR >>8;
DataPacketHeader[11] = 0x00;
DataPacketHeader[12] = 0x00;
DataPacketHeader[13] = HR ;
DataPacketHeader[14] = HR >>8;
DataPacketHeader[15] = 0x00;
DataPacketHeader[16] = 0x00;
DataPacketHeader[17] = 0x00;
DataPacketHeader[18] = 0x0b;
for(i=0; i<19; i++) // transmit the data
{
Serial.write(DataPacketHeader[i]);
}
delay(1);
}
void MAX30003_Reg_Write (unsigned char WRITE_ADDRESS, unsigned long data)
{
// now combine the register address and the command into one byte:
byte dataToSend = (WRITE_ADDRESS<<1) | WREG;
// take the chip select low to select the device:
digitalWrite(MAX30003_CS_PIN, LOW);
delay(2);
SPI.transfer(dataToSend); //Send register location
SPI.transfer(data>>16); //number of register to wr
SPI.transfer(data>>8); //number of register to wr
SPI.transfer(data); //Send value to record into register
delay(2);
// take the chip select high to de-select:
digitalWrite(MAX30003_CS_PIN, HIGH);
}
void max30003_sw_reset(void)
{
MAX30003_Reg_Write(SW_RST,0x000000);
delay(100);
}
void max30003_synch(void)
{
MAX30003_Reg_Write(SYNCH,0x000000);
}
void MAX30003_Reg_Read(uint8_t Reg_address)
{
uint8_t SPI_TX_Buff;
digitalWrite(MAX30003_CS_PIN, LOW);
SPI_TX_Buff = (Reg_address<<1 ) | RREG;
SPI.transfer(SPI_TX_Buff); //Send register location
for ( i = 0; i < 3; i++)
{
SPI_temp_32b[i] = SPI.transfer(0xff);
}
digitalWrite(MAX30003_CS_PIN, HIGH);
}
void MAX30003_Read_Data(int num_samples)
{
uint8_t SPI_TX_Buff;
digitalWrite(MAX30003_CS_PIN, LOW);
SPI_TX_Buff = (ECG_FIFO_BURST<<1 ) | RREG;
SPI.transfer(SPI_TX_Buff); //Send register location
for ( i = 0; i < num_samples*3; ++i)
{
SPI_temp_Burst[i] = SPI.transfer(0x00);
}
digitalWrite(MAX30003_CS_PIN, HIGH);
}
void MAX30003_begin()
{
//Start CLK timer
Timer1.initialize(16); // set a timer of length 100000 microseconds (or 0.1 sec - or 10Hz => the led will blink 5 times, 5 cycles of on-and-off, per second)
Timer1.attachInterrupt( timerIsr ); // attach the service routine here
max30003_sw_reset();
delay(100);
MAX30003_Reg_Write(CNFG_GEN, 0x081007);
delay(100);
MAX30003_Reg_Write(CNFG_CAL, 0x720000); // 0x700000
delay(100);
MAX30003_Reg_Write(CNFG_EMUX,0x0B0000);
delay(100);
MAX30003_Reg_Write(CNFG_ECG, 0x005000); // d23 - d22 : 10 for 250sps , 00:500 sps
delay(100);
MAX30003_Reg_Write(CNFG_RTOR1,0x3fc600);
max30003_synch();
delay(100);
}
/**
* Copyright (c) 2015 - 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
* 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
* engineered, decompiled, modified and/or disassembled.
*
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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"
#include "MAX30003.h"
#include <math.h>
#include <string.h>
#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 TEST_STRING "patil"
// 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. */
//FOr ECG Tx Buffer
uint8_t SPI_RX_Buff[6]; /**< RX buffer. */
uint8_t SPI_TX_Buff[6];
uint8_t ECG_length = sizeof(SPI_TX_Buff);
//volatile char SPI_RX_Buff[5] ;
volatile char *SPI_RX_Buff_Ptr;
int i=0;
unsigned long uintECGraw = 0;
signed long intECGraw=0;
uint8_t DataPacketHeader[20];
uint8_t data_len = 8;
signed long ecgdata;
unsigned long data;
char SPI_temp_32b[4];
char SPI_temp_Burst[100];
static const uint8_t m_board_led_list[LEDS_NUMBER] = SPI_LIST;
/* As Reference from Aurdino Code */
void bsp_board_toggle_pin(uint32_t pin_idx);
void timerIsr();
void MAX30003_Reg_Write (unsigned char WRITE_ADDRESS, unsigned long data);
void max30003_sw_reset(void);
void max30003_synch(void);
void MAX30003_Reg_Read(uint8_t Reg_address);
void MAX30003_Read_Data(int num_samples);
void MAX30003_begin();
void max30003_sw_reset(void)
{
nrf_gpio_pin_set(SPI_SS_PIN); //Slave select Set
nrf_gpio_pin_clear(SPI_SS_PIN); //Slave select High
MAX30003_Reg_Write(SW_RST,0x00); //As per Arduino Code
}
void max30003_synch(void)
{
MAX30003_Reg_Write(SYNCH,0x000000); //As per Arduino Code
}
void timerIsr()
{
nrf_gpio_pin_toggle(NRF_FCLK_PIN); //As per Arduino Code
}
void MAX30003_Reg_Write (unsigned char WRITE_ADDRESS, unsigned long data) //Its Completed //for main.oerror
{
uint8_t dataToSend[1] = (WRITE_ADDRESS<<1) | WREG;
nrf_gpio_pin_clear(SPI_SS_PIN);
nrf_delay_ms(200);
(nrf_drv_spi_transfer(&spi, (const uint8_t *)dataToSend[1], ECG_length, SPI_RX_Buff, ECG_length));
(nrf_drv_spi_transfer(&spi, (const uint8_t *)(data>>16), ECG_length, SPI_RX_Buff, ECG_length));
(nrf_drv_spi_transfer(&spi, (const uint8_t *)(data>>8), ECG_length, SPI_RX_Buff, ECG_length));
(nrf_drv_spi_transfer(&spi, (const uint8_t *)(data), ECG_length, SPI_RX_Buff, ECG_length));
nrf_delay_ms(200);
nrf_gpio_pin_set(SPI_SS_PIN);
}
void MAX30003_Reg_Read(uint8_t Reg_address) //Its Completed
{
uint8_t A[1]=0xFF;
nrf_gpio_pin_clear(SPI_SS_PIN); // as per arduino code
SPI_TX_Buff[20] = (Reg_address<<1 ) | RREG;
(nrf_drv_spi_transfer(&spi, (const uint8_t *)SPI_TX_Buff[20], ECG_length, SPI_RX_Buff, ECG_length));
for ( i = 0; i < 3; i++)
{
SPI_temp_32b[i]=nrf_drv_spi_transfer(&spi, (const uint8_t *)A[1], ECG_length, SPI_RX_Buff, ECG_length);
}
nrf_gpio_pin_set(SPI_SS_PIN); //it make High
}
void MAX30003_Read_Data(int num_samples) //Its Completed
{
uint8_t A[1]=0x00;
nrf_gpio_pin_clear(SPI_SS_PIN); // as per arduino code
SPI_TX_Buff[20] = (ECG_FIFO_BURST<<1 ) | RREG;
(nrf_drv_spi_transfer(&spi, (const uint8_t *)SPI_TX_Buff[20], ECG_length, SPI_RX_Buff, ECG_length));
for ( i = 0; i < num_samples*3; ++i)
{
SPI_temp_Burst[i] = (nrf_drv_spi_transfer(&spi, (const uint8_t *)A[1], ECG_length, SPI_RX_Buff, ECG_length));
}
nrf_gpio_pin_set(SPI_SS_PIN); //it make High
}
void MAX30003_begin()
{
max30003_sw_reset();
nrf_delay_ms(100);
MAX30003_Reg_Write(CNFG_GEN, 0x081007);
nrf_delay_ms(100);
MAX30003_Reg_Write(CNFG_CAL, 0x720000); // 0x700000
nrf_delay_ms(100);
MAX30003_Reg_Write(CNFG_EMUX,0x0B0000);
nrf_delay_ms(100);
MAX30003_Reg_Write(CNFG_ECG, 0x005000); // d23 - d22 : 10 for 250sps , 00:500 sps
nrf_delay_ms(100);
MAX30003_Reg_Write(CNFG_RTOR1,0x3fc600);
max30003_synch();
nrf_delay_ms(100);
}
void spi_event_handler(nrf_drv_spi_evt_t const * p_event,
void * p_context)
{
nrf_gpio_pin_set(SPI_SS_PIN);
spi_xfer_done = true;
NRF_LOG_INFO("Transfer completed.");
if (SPI_RX_Buff[0] != 0)
{
NRF_LOG_INFO(" Received:");
NRF_LOG_HEXDUMP_INFO(SPI_RX_Buff, strlen((const char *)SPI_RX_Buff));
}
}
int main(void)
{
char ECG_CHAR[30];
/*From Procentral upto line 222 */
MAX30003_Reg_Read(ECG_FIFO);
unsigned long data0 = (unsigned long) (SPI_temp_32b[0]);
data0 = data0 <<24;
unsigned long data1 = (unsigned long) (SPI_temp_32b[1]);
data1 = data1 <<16;
unsigned long data2 = (unsigned long) (SPI_temp_32b[2]);
data2 = data2 >>6;
data2 = data2 & 0x03;
data = (unsigned long) (data0 | data1 | data2);
ecgdata = (signed long) (data);
MAX30003_Reg_Read(RTOR);
unsigned long RTOR_msb = (unsigned long) (SPI_temp_32b[0]);
unsigned char RTOR_lsb = (unsigned char) (SPI_temp_32b[1]);
unsigned long rtor = (RTOR_msb<<8 | RTOR_lsb);
rtor = ((rtor >>2) & 0x3fff);
float hr = 60 /((float)rtor*0.008);
unsigned int HR = (unsigned int)hr; // type cast to int
unsigned int RR = (unsigned int)rtor*8 ; //8ms
DataPacketHeader[0] = 0x0A;
DataPacketHeader[1] = 0xFA;
DataPacketHeader[2] = 0x0C;
DataPacketHeader[3] = 0;
DataPacketHeader[4] = 0x02;
DataPacketHeader[5] = ecgdata;
DataPacketHeader[6] = ecgdata>>8;
DataPacketHeader[7] = ecgdata>>16;
DataPacketHeader[8] = ecgdata>>24;
DataPacketHeader[9] = RR ;
DataPacketHeader[10] = RR >>8;
DataPacketHeader[11] = 0x00;
DataPacketHeader[12] = 0x00;
DataPacketHeader[13] = HR ;
DataPacketHeader[14] = HR >>8;
DataPacketHeader[15] = 0x00;
DataPacketHeader[16] = 0x00;
DataPacketHeader[17] = 0x00;
DataPacketHeader[18] = 0x0b;
bsp_board_init(BSP_INIT_LEDS);
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.ss_pin = SPI_SS_PIN; //29
spi_config.miso_pin = SPI_MISO_PIN; //28
spi_config.mosi_pin = SPI_MOSI_PIN; //4
spi_config.sck_pin = SPI_SCK_PIN; //3
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
NRF_LOG_INFO("SPI example started.");
while (1)
{
// Reset rx buffer and transfer done flag
memset(SPI_RX_Buff, 0, ECG_length);
spi_xfer_done = false;
for(i=0; i<19; i++) // transmit the data
{
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, (const uint8_t *) DataPacketHeader[i], ECG_length, SPI_RX_Buff, ECG_length));
}
while (!spi_xfer_done)
{
__WFE();
}
NRF_LOG_FLUSH();
bsp_board_led_invert(BSP_BOARD_LED_0);
nrf_delay_ms(200);
}
}
