Heart rate sensor BH1790

[loukh]

Hi , thank you for response
the code is the Following ;

#include <Wire.h>
#include <BH1790GLC.h>
#include <FlexiTimer2.h>

extern "C" {
#include <hr_bh1790.h>
}

#define SAMPLING_CNT_32HZ (32)

BH1790GLC bh1790glc;
volatile bool timer_flg;
void timer_isr(void);

static uint8_t s_cnt_freq = 0;

void setup() {

uint16_t ret16 = ERROR_NONE;

timer_flg = false;
Serial.begin(115200);
while (!Serial);

Wire.begin();
Wire.setClock(400000L);

s_cnt_freq = 0;

ret16 = hr_bh1790_Init();
if (ret16 == ERROR_NONE) {
Serial.println(F("BPM, wearing"));
FlexiTimer2::stop();
FlexiTimer2::set(250, 1.0/8000, timer_isr); // 32Hz timer
FlexiTimer2::start();

ret16 = hr_bh1790_StartMeasure();
if (ret16 != ERROR_NONE) {
  Serial.println(F("Error: hr_bh1790_StartMeasure function"));
  Serial.print(F("ret16 = "));
  Serial.println(ret16, HEX);      
}

} else {
Serial.println(F("Error: hr_bh1790_Init function"));
Serial.print(F("ret16 = "));
Serial.println(ret16, HEX);
}
}

void loop() {

uint8_t bpm = 0U;
uint8_t wearing = 0U;
uint16_t ret16 = ERROR_NONE;

if (timer_flg) {
ret16 = hr_bh1790_Calc(s_cnt_freq);
if (ret16 == ERROR_NONE) {
s_cnt_freq++;
if (s_cnt_freq >= SAMPLING_CNT_32HZ) {
s_cnt_freq = 0;
hr_bh1790_GetData(&bpm, &wearing);
Serial.print(bpm, DEC);
Serial.print(F(","));
Serial.println(wearing, DEC);
}
} else {
Serial.println(F("Error: hr_bh1790_Calc function"));
Serial.print(F("ret16 = "));
Serial.println(ret16, HEX);
}
timer_flg = false;
}
}

void timer_isr(void) {
timer_flg = true;
}

int8_t bh1790_Write(uint8_t adr, uint8_t *data, uint8_t size)
{
byte rc = 0;
int8_t ret = 0;

rc = bh1790glc.write(adr, data, size);
if (rc == 0) {
ret = BH1790_RC_OK;
} else {
ret = BH1790_RC_I2C_ERR;
}

return (ret);
}

int8_t bh1790_Read(uint8_t adr, uint8_t *data, uint8_t size)
{
byte rc = 0;
int8_t ret = 0;

rc = bh1790glc.read(adr, data, size);
if (rc == 0) {
ret = BH1790_RC_OK;
} else {
ret = BH1790_RC_I2C_ERR;
}

return (ret);
}