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/*
* HMI.cpp
*
* Created on: 17.08.2021
* Author: steffen
* SPDX-FileCopyrightText: 2022 MDC Service <info@mdc-service.de>
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "HMI.h"
/**
* HMI: constructor
*
* @param fh device handle.
*/
#ifdef ESP32
HMI::HMI(int fh) {
_devh = fh;
}
#else
HMI::HMI(const char *dev, const uint16_t baud) {
struct termios t1, t2;
int bd = B115200;
if (baud == 57600)
bd = B57600;
_devh = open(dev, O_RDWR | O_NONBLOCK);
if (_devh < 0) {
fprintf(stderr, "Unable to open serial device %s", dev);
} else {
tcgetattr(_devh, &t1);
tcgetattr(_devh, &t2);
cfmakeraw(&t1);
t1.c_cflag = (CLOCAL | CS8 | CREAD);
cfsetspeed(&t1, bd);
t1.c_cc[VMIN] = 0;
t1.c_cc[VTIME] = 0;
tcsetattr(_devh, TCSADRAIN, &t1);
}
}
#endif
/**
* HMI::serial_read: read from the serial port
*
* @param fh device handle.
* @param buf buffer to read into.
* @returns number of bytes read.
*/
int HMI::serial_read(int fh, char *buf) {
#ifdef ESP32
return (uart_read_bytes(fh, buf, 1, 1));
#else
return (read(fh,buf,1));
#endif
}
/**
* HMI::serial_write: write from the serial port
*
* @param fh device handle.
* @param buf buffer to read into.
* @param len buffer lenght.
* @returns number of bytes written.
*/
int HMI::serial_write(int fh, char *buf, int len) {
#ifdef ESP32
return (uart_write_bytes(fh, buf, len));
#else
return(write(fh,buf,len));
#endif
}
/**
* HMI::iReadProt: read protocol from HMI
*
* @param ms timeout in milliseconds.
* @returns number of bytes written.
*/
int HMI::iReadProt(int ms) {
int cnt = ms;
int ec = 0; // end counter (3 x 0xFF)
char rc;
int i=0;
int res;
printf("CNT:%d\n",cnt);fflush(stdout);
while (cnt > 0) {
if ((res=serial_read(_devh, &rc)) == 1) {
#ifdef DEBUG
printf(" <%02X> ", rc);
fflush (stdout);
#endif
RecvBuf[i++]=rc;
if (rc==0xFF) {
ec++;
if (ec==3) {
i-=3;
RecvBuf[i]=0;
#ifdef DEBUG
idumpbuf(RecvBuf,i);
printf("OK Received:%d\n", i);
fflush(stdout);
#endif
return HMIResultOK;
}
}
cnt = ms;
} else {
cnt--;
#ifdef DEBUG
printf(" - ");
fflush (stdout);
#endif
#ifdef ESP32
vTaskDelay(1);
#else
usleep(1000);
#endif
}
}
if (i==0) return HMIResultReadErr;
RecvBuf[i]=0;
#ifdef DEBUG
printf("ERR Received:%d:%s\n", i,RecvBuf);
fflush(stdout);
#endif
return HMIResultReadErr;
}
/**
* HMI::iReadValue: read an integer
*
* @param name, value the key/value(integer) pair to read.
* @returns number of bytes written.
*/
int HMI::iReadValue(char *name,int *result) {
char cmd[64];
int res;
sprintf(cmd,"get %s.txt",name);
res=iSendProt((int)strlen(cmd),cmd);
return res;
}
/**
* HMI::iReadValue: read an string
*
* @param name, value the key/value(string) pair to read.
* @returns number of bytes written.
*/
int HMI::iReadValue(char *name, char *result) {
char cmd[64];
int res;
sprintf(cmd,"get %s.txt",name);
res=iSendProt((int)strlen(cmd),cmd,10);
// printf(">%s:%d<\n",cmd,res);fflush(stdout);
if (res==HMIResultOK) {
// idumpbuf((void *)RecvBuf, (int)strlen((char *)RecvBuf));
strncpy(result,(char *)&RecvBuf[1],16);
}
return res;
}
/**
* HMI::iWriteValue: write an integer
*
* @param name, value the key/value(integer) pair to write.
* @returns number of bytes written.
*/
int HMI::iWriteValue(char *name,int value) {
char cmd[64];
int res;
sprintf(cmd,"%s.txt=\"%d\"",name,value);
#ifdef DEBUG
// printf(">%s<\n",cmd);fflush(stdout);
#endif
res=iSendProt((int)strlen(cmd),cmd);
return res;
}
/**
* HMI::iWriteValue: write a string
*
* @param name, value the key/value(string) pair to write.
* @returns number of bytes written.
*/
int HMI::iWriteValue(char *name,char * value) {
char cmd[64];
int res;
sprintf(cmd,"%s.txt=\"%s\"",name,value);
#ifdef DEBUG
// printf(">%s<\n",cmd);fflush(stdout);
#endif
res=iSendProt((int)strlen(cmd),cmd);
return res;
}
int HMI::iSendProt(int len, char *data) {
int res = 0;
int res2=0;
char lbuf[]={0xFF,0xFF,0xFF};
res = serial_write(_devh, (char *)data, (int)len);
if (res>0) res2=serial_write(_devh, lbuf, 3);
else return HMIResultWriteErr;
if (res2<0) return HMIResultWriteErr;
return HMIResultOK;;
}
int HMI::iSendProt(int len, char *data, int wait) {
int res = 0;
int res2=0;
char lbuf[]={0xFF,0xFF,0xFF};
res = serial_write(_devh, (char *)data, (int)len);
if (res>0) res2=serial_write(_devh, (char *)lbuf, 3);
else return HMIResultWriteErr;
if (res2<0) return HMIResultWriteErr;
if (wait==0) return res;
res = iReadProt(wait);
return res;
}
void HMI::idumpbuf(void *buf, int len) {
int i, c;
char *lb = (char*) buf;
for (i = 0; i < len; i++) {
c = (char) *lb++;
printf("%02X ", c);
}
printf("\n");
}
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