workaround about MB2HAL H+L register value
15 Sep 2022 19:16 #252026
by bkt
These func for load pin value that is MB2HAL register .... because need to load 32bit register, can convert these func for read 16bit value 2 time on 2 consecutive register than combine it to obtain 32bit register??
sometings like these:
these can work or there are other way to obtain char value from bit? ... because value->f was unable to show in some way H part of my 16bit+16bit register .... but L part can see perfectly with value->f ... but only positive value.
workaround about MB2HAL H+L register value was created by bkt
float get_float_pin_val(QString nV){
char nHv[strlen(nV.toStdString().c_str()) + 1];
strcpy(nHv, nV.toStdString().c_str());
hal_data_u *value;
hal_type_t type;
bool *con = nullptr;
float checkVal = 0;
int r=hal_get_pin_value_by_name(nHv,&type,&value,con);
if(r!=0){
checkVal = -1;
}
else {
checkVal = value->f;
}
return checkVal;
}
These func for load pin value that is MB2HAL register .... because need to load 32bit register, can convert these func for read 16bit value 2 time on 2 consecutive register than combine it to obtain 32bit register??
sometings like these:
float get_float_pin_val(QString nV, QString nVplus1){
char nHv[strlen(nV.toStdString().c_str()) + 1];
strcpy(nHv, nVplus1.toStdString().c_str());
char nHvplus1[strlen(nV.toStdString().c_str()) + 1];
strcpy(nHvplus1, nVplus1.toStdString().c_str());
hal_data_u *value;
hal_type_t type;
bool *con = nullptr;
char checkVal[16];
char checkVal1[16];
int r=hal_get_pin_value_by_name(nHv,&type,&value,con);
if(r!=0){
checkVal = {};
}
else {
checkVal = value->b;
}
int r1=hal_get_pin_value_by_name(nHvplus1,&type,&value,con);
if(r1!=0){
checkVal1 = {};
}
else {
checkVal1 = value->b;
}
/* usual combining code for checkVal1 & checkVal or L+H 16bit register*/
}
these can work or there are other way to obtain char value from bit? ... because value->f was unable to show in some way H part of my 16bit+16bit register .... but L part can see perfectly with value->f ... but only positive value.
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26 Sep 2022 12:39 #252758
by andypugh
Replied by andypugh on topic workaround about MB2HAL H+L register value
combining 2 x 16 bit registers into 1 x 32-bit isn't especially easy.
One way to do it in C code is to create a Union data structure, containing a float and a U32 in the same memory location. Load in the 16-bit patterns, and then read the value back as a float.
But I a not really understanding the nature of the question, so this might not be a useful answer.
One way to do it in C code is to create a Union data structure, containing a float and a U32 in the same memory location. Load in the 16-bit patterns, and then read the value back as a float.
But I a not really understanding the nature of the question, so this might not be a useful answer.
The following user(s) said Thank You: bkt
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