DFRobot HT1632 Library HELP

kgray9 · June 22, 2022, 1:21pm

Hello all!

I am making a project with the DFRobot HT1632 display. I try to compile the demo code though, and I get a list of errors that I have no idea how to fix. The whole list of errors seem to be very similar; something to do with a wrong "min" functions in the library... maybe?

Does anyone have any ideas on how to fix the errors and get this code compiling?

Thanks in advance!

Code:

#include "DFRobot_HT1632C.h"

#define DATA 10 //D6
#define CS 9    //D5
#define WR 13   //D7

DFRobot_HT1632C ht1632c = DFRobot_HT1632C(DATA, WR,CS);

char str[] = "DFROBOT 2017";

void setup() {
  Serial.begin(115200);
  // put your setup code here, to run once:
  ht1632c.begin();
  ht1632c.isLedOn(true);
  ht1632c.clearScreen();
  delay(500);
}

void loop() {
  // put your main code here, to run repeatedly:
  ht1632c.print(str,50);
  //delay(100);
}

Error:

/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp: In member function 'void DFRobot_HT1632C::drawImage(const byte*, uint8_t, uint8_t, int8_t, int8_t, int)':
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:464:57: error: no matching function for call to 'min(uint8_t&, int)'
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
In file included from /Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/algorithm:62,
                 from /Users/user/Library/Arduino15/packages/DFRobot/hardware/esp32/0.2.1/cores/esp32/Arduino.h:145,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.h:17,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:13:
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algo.h:3456:5: note: candidate: 'template<class _Tp, class _Compare> _Tp std::min(std::initializer_list<_Tp>, _Compare)'
     min(initializer_list<_Tp> __l, _Compare __comp)
     ^~~
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algo.h:3456:5: note:   template argument deduction/substitution failed:
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:464:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'unsigned char'
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
In file included from /Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/algorithm:62,
                 from /Users/user/Library/Arduino15/packages/DFRobot/hardware/esp32/0.2.1/cores/esp32/Arduino.h:145,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.h:17,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:13:
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algo.h:3450:5: note: candidate: 'template<class _Tp> _Tp std::min(std::initializer_list<_Tp>)'
     min(initializer_list<_Tp> __l)
     ^~~
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algo.h:3450:5: note:   template argument deduction/substitution failed:
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:464:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'unsigned char'
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
In file included from /Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/algorithm:61,
                 from /Users/user/Library/Arduino15/packages/DFRobot/hardware/esp32/0.2.1/cores/esp32/Arduino.h:145,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.h:17,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:13:
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algobase.h:243:5: note: candidate: 'template<class _Tp, class _Compare> const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algobase.h:243:5: note:   template argument deduction/substitution failed:
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:464:57: note:   deduced conflicting types for parameter 'const _Tp' ('unsigned char' and 'int')
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
In file included from /Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/algorithm:61,
                 from /Users/user/Library/Arduino15/packages/DFRobot/hardware/esp32/0.2.1/cores/esp32/Arduino.h:145,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.h:17,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:13:
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algobase.h:195:5: note: candidate: 'template<class _Tp> const _Tp& std::min(const _Tp&, const _Tp&)'
     min(const _Tp& __a, const _Tp& __b)
     ^~~
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algobase.h:195:5: note:   template argument deduction/substitution failed:
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:464:57: note:   deduced conflicting types for parameter 'const _Tp' ('unsigned char' and 'int')
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp: In member function 'void DFRobot_HT1632C::drawImageStr(const byte*, uint8_t, uint8_t, int8_t, int8_t, int)':
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:506:57: error: no matching function for call to 'min(uint8_t&, int)'
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
In file included from /Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/algorithm:62,
                 from /Users/user/Library/Arduino15/packages/DFRobot/hardware/esp32/0.2.1/cores/esp32/Arduino.h:145,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.h:17,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:13:
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algo.h:3456:5: note: candidate: 'template<class _Tp, class _Compare> _Tp std::min(std::initializer_list<_Tp>, _Compare)'
     min(initializer_list<_Tp> __l, _Compare __comp)
     ^~~
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algo.h:3456:5: note:   template argument deduction/substitution failed:
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:506:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'unsigned char'
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
In file included from /Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/algorithm:62,
                 from /Users/user/Library/Arduino15/packages/DFRobot/hardware/esp32/0.2.1/cores/esp32/Arduino.h:145,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.h:17,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:13:
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algo.h:3450:5: note: candidate: 'template<class _Tp> _Tp std::min(std::initializer_list<_Tp>)'
     min(initializer_list<_Tp> __l)
     ^~~
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algo.h:3450:5: note:   template argument deduction/substitution failed:
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:506:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'unsigned char'
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
In file included from /Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/algorithm:61,
                 from /Users/user/Library/Arduino15/packages/DFRobot/hardware/esp32/0.2.1/cores/esp32/Arduino.h:145,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.h:17,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:13:
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algobase.h:243:5: note: candidate: 'template<class _Tp, class _Compare> const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algobase.h:243:5: note:   template argument deduction/substitution failed:
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:506:57: note:   deduced conflicting types for parameter 'const _Tp' ('unsigned char' and 'int')
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
In file included from /Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/algorithm:61,
                 from /Users/user/Library/Arduino15/packages/DFRobot/hardware/esp32/0.2.1/cores/esp32/Arduino.h:145,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.h:17,
                 from /Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:13:
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algobase.h:195:5: note: candidate: 'template<class _Tp> const _Tp& std::min(const _Tp&, const _Tp&)'
     min(const _Tp& __a, const _Tp& __b)
     ^~~
/Users/user/Library/Arduino15/packages/DFRobot/tools/xtensa-esp32-elf-gcc/gcc8_4_0-esp-2020r3/xtensa-esp32-elf/include/c++/8.4.0/bits/stl_algobase.h:195:5: note:   template argument deduction/substitution failed:
/Users/user/Desktop/Arduino/libraries/DFRobot_HT1632C/DFRobot_HT1632C.cpp:506:57: note:   deduced conflicting types for parameter 'const _Tp' ('unsigned char' and 'int')
    copyInNextStep = min(copyInNextStep, (height - src_y));
                                                         ^
exit status 1
Error compiling for board FireBeetle ESP32-E.

jremington · June 22, 2022, 3:09pm

It is obvious what is intended. I would replace the min() function call with an if statement.

kgray9 · June 22, 2022, 3:17pm

Hello @jremington

Sorry, could you please show me an example?

anon57585045 · June 22, 2022, 3:23pm

It's because Arduino unwisely decided to redefine the min() function that already exists in C, with a macro that doesn't always work.

jremington · June 22, 2022, 3:28pm

You have been posting on this forum for some time now, and have yet to learn basic C/C++ programming. It is time to correct that failure.

You can replace

copyInNextStep = min(copyInNextStep, (height - src_y));

with

if (height - src_y < copyInNextStep) copyInNextStep = height - src_y;

kgray9 · June 22, 2022, 3:32pm

I know; I am only 17yo and have never "learned" C/C++ coding. I get my experience from making projects. I know what the min functions does and the if function, but I am really flustered right now, so sorry.

Thanks for the example.

jremington · June 22, 2022, 3:45pm

Expect that to continue for a long time, if you bumble along as you presently do.

kgray9 · June 22, 2022, 3:48pm

No, I am flustered because this is for a competition project that ends in 9 days. I have another competition project that ends in ~20 days, and a third competition project that ends in ~1 month, not to mention multiple projects at home.

jremington · June 22, 2022, 3:55pm

You don't have the skills required to program robots for a competition.

kgray9 · June 22, 2022, 3:59pm

Why would you say that?

I'm not making a single robot.

kgray9 · June 22, 2022, 4:54pm

I just finished fixing the library. It compiles now, but nothing happens on the display!

anon57585045 · June 22, 2022, 5:06pm

If that was a request for help, you need to post the updated sketch. We can't see it.

kgray9 · June 22, 2022, 5:10pm

Sorry, the code is exactly identical to my first post.

All I did was exchange this:
copyInNextStep = min(copyInNextStep, (height - src_y));
with this:
if (height - src_y < copyInNextStep) copyInNextStep = height - src_y; in two different places in the "DFRobot_HT1632C.cpp" file.

I made sure to change the CS pin select switch on the bottom of the display, to "D5", to match the code.

Edit:
I also tried this code, but to no avail:

#include "DFRobot_HT1632C.h"

#define DATA D6
#define CS D5
#define WR D7
//#define RD 7

DFRobot_HT1632C ht1632c = DFRobot_HT1632C(DATA, WR,CS);

char str[] = "Hello";

void setup() {
  // put your setup code here, to run once:
  ht1632c.begin();
  ht1632c.isLedOn(true);
  ht1632c.clearScreen();
  ht1632c.setCursor(0,0);
  ht1632c.print(str);
}

void loop() {
  // put your main code here, to run repeatedly:

}

anon57585045 · June 22, 2022, 5:13pm

Are there no example sketches to test the display?

kgray9 · June 22, 2022, 5:14pm

There is this one which I also tried but didn't work:

drawText.ino

#include "DFRobot_HT1632C.h"

#if defined( ESP_PLATFORM ) || defined( ARDUINO_ARCH_FIREBEETLE8266 )  //FireBeetle-ESP32 FireBeetle-ESP8266
#define DATA D6
#define CS D5
#define WR D7
//#define RD D8
#else
#define DATA 6
#define CS 5
#define WR 7
//#define RD 8
#endif

DFRobot_HT1632C ht1632c = DFRobot_HT1632C(DATA, WR,CS);

char text[] = "123";

void setup() {
  // put your setup code here, to run once:
  ht1632c.begin();
  ht1632c.isLedOn(true);
  ht1632c.clearScreen();
}

void loop() {
  // put your main code here, to run repeatedly:
  ht1632c.drawText(text, 0, 0, FONT_8X4, FONT_8X4_END, FONT_8X4_HEIGHT);
  ht1632c.writeScreen();
  delay(1000);
}

anon57585045 · June 22, 2022, 5:14pm

Where did you get it? If it's a library example, your hardware connections are probably bad.

kgray9 · June 22, 2022, 5:15pm

github.com

Chocho2017/FireBeetleLEDMatrix/blob/master/DFRobot_HT1632C/examples/drawText/drawText.ino

#include "DFRobot_HT1632C.h"

#if defined( ESP_PLATFORM ) || defined( ARDUINO_ARCH_FIREBEETLE8266 )  //FireBeetle-ESP32 FireBeetle-ESP8266
#define DATA D6
#define CS D2
#define WR D7
//#define RD D8
#else
#define DATA 6
#define CS 2
#define WR 7
//#define RD 8
#endif

DFRobot_HT1632C ht1632c = DFRobot_HT1632C(DATA, WR,CS);

char text[] = "123";

void setup() {
  // put your setup code here, to run once:

This file has been truncated. show original

anon57585045 · June 22, 2022, 5:16pm

That's bad, don't use third party software to test. Surely the library comes with its own example?

kgray9 · June 22, 2022, 5:16pm

That's what im thinking, but the display is a shield; i.e. prewired.

anon57585045 · June 22, 2022, 5:17pm

Any other hardware connected?

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