[tm1637] Add buffer manipulation methods (#13686)

Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>

esphome/components/tm1637/tm1637.cpp

@@ -348,6 +348,12 @@ uint8_t TM1637Display::print(uint8_t start_pos, const char *str) {
   return pos - start_pos;
 }
 uint8_t TM1637Display::print(const char *str) { return this->print(0, str); }
+
+void TM1637Display::set_buffer(const uint8_t *data, uint8_t length) {
+  uint8_t len = std::min(length, (uint8_t) sizeof(this->buffer_));
+  memcpy(this->buffer_, data, len);
+}
+
 uint8_t TM1637Display::printf(uint8_t pos, const char *format, ...) {
   va_list arg;
   va_start(arg, format);

esphome/components/tm1637/tm1637.h

@@ -47,6 +47,9 @@ class TM1637Display : public PollingComponent {
   /// Print `str` at position 0.
   uint8_t print(const char *str);
 
+  /// Set raw buffer bytes from data array up to length bytes.
+  void set_buffer(const uint8_t *data, uint8_t length);
+
   void set_intensity(uint8_t intensity) { this->intensity_ = intensity; }
   void set_inverted(bool inverted) { this->inverted_ = inverted; }
   void set_length(uint8_t length) { this->length_ = length; }

tests/components/tm1637/common.yaml

@@ -5,3 +5,5 @@ display:
     intensity: 3
     lambda: |-
       it.print("1234");
+      static const uint8_t buf[] = {0x3f, 0x06, 0x5b, 0x4f | 0x80};
+      it.set_buffer(buf, sizeof(buf));