drath/linuxSmartie
0
0
Fork 0
Code Issues Pull Requests Actions Projects Releases Wiki Activity

i was never checking the return value of write

Browse Source
This commit is contained in:
Drath Vader
2025-11-27 15:23:17 +01:00
parent 34083f8a01
commit f86d40241e
2 changed files with 12 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
src/LCDDisplay.cpp
View File

@@ -33,17 +33,15 @@ LCDDisplay::LCDDisplay(std::string dev, uint32_t baud) {
// clear display and set cursor home
this->clear();
this->close();
log(LOG::INF, "LCDDisplay", "Opened LCD port at \"{}\"", _dev);
}
LCDDisplay::~LCDDisplay() {
this->close();
log(LOG::INF, "LCDDisplay", "Closed LCD port");
}
void LCDDisplay::open() {
if (_lcd < 0)
void LCDDisplay::open(bool reopen) {
log(LOG::INF, "LCDDisplay", "Opening serial port at \"{}\"", _dev);
if (_lcd < 0 || reopen)
_lcd = ::open(_dev.c_str(), O_RDWR | O_NOCTTY | O_NONBLOCK); // ::open calls the global open() instead of LCDDisplay::open()
if (_lcd < 0) {
log(LOG::ERR, "LCDDisplay", "Error opening serial port \"{}\"", _dev); // err
@@ -52,15 +50,19 @@ void LCDDisplay::open() {
}
void LCDDisplay::close() {
if (_lcd >= 0)
if (_lcd >= 0) {
::close(_lcd);
log(LOG::INF, "LCDDisplay", "Closed LCD port");
}
_lcd = -1;
}
void LCDDisplay::write(const uint8_t* cmdbuf, uint8_t len) {
this->open();
::write(_lcd, cmdbuf, len);
this->close();
int rc = ::write(_lcd, cmdbuf, len);
if(rc < 0) {
log(LOG::ERR, "LCDDisplay::write", "failed to execute ::write, lost access to port?");
this->open(true);
}
}
void LCDDisplay::clear() {