Well, after the previous post of mine, I found the following URL
https://www.oryx-embedded.com/doc/date__time_8c_source.html
So I tweaked a little,
schematic
main.c
For the fast result, I set Interval = 1, but for 5 minutes interval, please make it to 300,
Meantime if you have live RTC, you don't have to call set_date_time() function.
but for the realistic time, I added this function. (I was younger in 1970 😉
=========================
#include "project.h"
#include "stdio.h"
#include "date_time.h"
#define STR_LEN 32
#define RX_BUF_LEN 128
#define SPACE ' '
#define TAB '\t'
#define CR '\r'
#define LF '\n'
volatile uint32_t unix_time = 0 ;
volatile int pit_flag = 0 ;
volatile char rx_buf[RX_BUF_LEN] ;
volatile int rx_write_index = 0 ;
int rx_read_index = 0 ;
char str[STR_LEN+1] ; /* print buffer */
int str_index = 0 ;
inline int is_delimiter(uint8_t c) ;
void print(char *str) ;
void init_hardware(void) ;
void splash(void) ;
int get_string(char *str) ;
void prompt(void) ;
int year = 2019 ;
int month = 05 ;
int day = 16 ;
int hours = 8;
int minutes = 32;
int seconds = 36 ;
float R_value = 4700 ; /* 4.7 k ohm for place holder */
CY_ISR(uart_rx_isr)
{
uart_rx_int_ClearPending() ;
if (UART_GetRxBufferSize()) {
rx_buf[rx_write_index] = UART_GetByte() ;
rx_write_index = (rx_write_index + 1) % RX_BUF_LEN ;
}
}
CY_ISR(timer_isr)
{
timer_int_ClearPending() ;
Timer_ReadStatusRegister() ;
unix_time++ ;
pit_flag = 1 ;
}
void set_date_time(void)
{
DateTime date_time ;
print("Enter Date (YYYY/MM/DD) > ") ;
while(get_string(str) <= 0) ;
sscanf(str, "%d/%d/%d", &year, &month, &day) ;
print("Enter Time (hh:mm:ss) > ") ;
while(get_string(str) <= 0) ;
sscanf(str, "%d:%d:%d", &hours, &minutes, &seconds) ;
date_time.year = year ;
date_time.month = month - 1 ; /* unix time, month is 0~11 instead of 1~12 orz */
date_time.day = day ;
date_time.hours = hours ;
date_time.minutes = minutes ;
date_time.seconds = seconds ;
unix_time = convertDateToUnixTime(&date_time) ;
}
void measure(float *mV, float *mA)
{
int16_t adc_count ;
ADC_StartConvert() ;
ADC_IsEndConversion(ADC_WAIT_FOR_RESULT) ;
adc_count = ADC_GetResult16(0) ; /* channel 0 */
*mV = (float)ADC_CountsTo_mVolts(adc_count) ;
*mA = *mV / R_value ;
}
void print_csv_title(void)
{
print("Date, Time, Voltage Ush[mV], Current lpv[mA]\n") ;
}
void print_csv(float mV, float mA)
{
DateTime date_time ;
convertUnixTimeToDate(unix_time, &date_time) ;
sprintf(str, "%d.%02d.%4d, ",
date_time.day,
date_time.month + 1,
date_time.year) ;
print(str) ;
sprintf(str, "%02d:%02d:%02d, ",
date_time.hours,
date_time.minutes,
date_time.seconds ) ;
print(str) ;
sprintf(str, "%d.%04d, ",
(int)mV, (int)(mV * 10000) % 10000) ;
print(str) ;
sprintf(str, "%d.%04d\n",
(int)mA, (int)(mA * 10000) % 10000) ;
print(str) ;
}
int main(void)
{
float mV, mA ;
uint32_t count = 0 ;
uint32_t interval = 1 ; // 300 ; /* 5 minutes */
int period = 0 ;
init_hardware() ;
splash() ;
sprintf(str, "Interval = %d sec\n", interval) ;
print(str) ;
set_date_time() ;
print_csv_title() ;
for(;;) {
if (pit_flag) { /* timer interrupt occurred */
pit_flag = 0 ;
count++ ;
if (count >= interval) {
count = 0 ;
measure(&mV, &mA) ;
print_csv(mV, mA) ;
}
}
}
}
inline int is_delimiter(uint8_t c)
{
int result = 0 ;
switch(c) {
case CR:
case LF:
case TAB:
case SPACE:
result = c ;
break ;
}
return( result ) ;
}
void init_hardware(void)
{
UART_ClearRxBuffer() ;
uart_rx_int_ClearPending() ;
uart_rx_int_StartEx(uart_rx_isr) ;
UART_Start() ;
timer_int_ClearPending() ;
timer_int_StartEx(timer_isr) ;
Timer_ReadStatusRegister() ;
Timer_Start() ;
ADC_Start() ;
CyGlobalIntEnable; /* Enable global interrupts. */
}
void splash(void)
{
sprintf(str, "\nTimer Test (%s %s)\n", __DATE__, __TIME__) ;
print(str) ;
}
void print(char *str)
{
UART_PutString(str) ;
}
void prompt(void)
{
print("> ") ;
}
int get_string(char str[])
{
int result = 0 ;
static int str_index = 0 ;
if (rx_read_index != rx_write_index) {
if (is_delimiter(rx_buf[rx_read_index])) {
str[str_index] = 0 ;
str_index = 0 ;
result = 1 ;
} else {
str[str_index] = rx_buf[rx_read_index] ;
str_index++ ;
if (str_index >= STR_LEN) {
str[STR_LEN] = 0 ;
str_index = 0 ;
result = -1 ;
}
}
rx_read_index = (rx_read_index + 1) % RX_BUF_LEN ;
}
return( result ) ;
}
===============
Tera Term log
Serial Plot Settings
After disconnecting Tera Term,
Data Format
Plot (Note: I unchecked date and time )
The displayed result
Getting log from Tera Term
After disconnecting Serial Plot
Select Menu: File > Log ...
Specify log file
It can be anywhere in your system with any name, but I chose log_190616.csv
After logged a little I stopped Tera Term then located and opened the log file
Excel showed following (I adjusted the width of columns)
Attached is my sample project using CY8CKIT-059.
moto
