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[ssd1306_i2c] fix "SSD1306 72x40" display initialization (add SSD1306B Iref setup) (#13148)

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Cougar
2026-01-14 01:30:15 +02:00
committed by GitHub
parent 52c631384a
commit be12e3667a
3 changed files with 14 additions and 3 deletions
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esphome/components/ssd1306_base/ssd1306_base.cpp
+10
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@@ -32,6 +32,8 @@ static const uint8_t SSD1306_COMMAND_PAGE_ADDRESS = 0x22;
static const uint8_t SSD1306_COMMAND_NORMAL_DISPLAY = 0xA6;
static const uint8_t SSD1306_COMMAND_INVERSE_DISPLAY = 0xA7;
static const uint8_t SSD1306B_COMMAND_SELECT_IREF = 0xAD;
static const uint8_t SSD1305_COMMAND_SET_BRIGHTNESS = 0x82;
static const uint8_t SSD1305_COMMAND_SET_AREA_COLOR = 0xD8;
@@ -95,6 +97,12 @@ void SSD1306::setup() {
this->command(0x8B);
}
} else {
if (this->is_ssd1306b_()) {
// Select external or internal Iref (0xAD)
this->command(SSD1306B_COMMAND_SELECT_IREF);
// Enable internal Iref and change from 19ua (POR) to 30uA
this->command(0x20 | 0x10);
}
// Enable charge pump (0x8D)
this->command(SSD1306_COMMAND_CHARGE_PUMP);
if (this->external_vcc_) {
@@ -226,6 +234,8 @@ bool SSD1306::is_sh1107_() const { return this->model_ == SH1107_MODEL_128_64 ||
bool SSD1306::is_ssd1305_() const {
return this->model_ == SSD1305_MODEL_128_64 || this->model_ == SSD1305_MODEL_128_32;
}
bool SSD1306::is_ssd1306b_() const { return this->model_ == SSD1306_MODEL_72_40; }
void SSD1306::update() {
this->do_update_();
this->display();
esphome/components/ssd1306_base/ssd1306_base.h
+1
View File
@@ -63,6 +63,7 @@ class SSD1306 : public display::DisplayBuffer {
bool is_sh1106_() const;
bool is_sh1107_() const;
bool is_ssd1305_() const;
bool is_ssd1306b_() const;
void draw_absolute_pixel_internal(int x, int y, Color color) override;
esphome/components/ssd1306_i2c/ssd1306_i2c.cpp
+3 -3
View File
@@ -62,9 +62,9 @@ void HOT I2CSSD1306::write_display_data() {
}
} else {
size_t block_size = 16;
if ((this->get_buffer_length_() & 8) == 8) {
// use smaller block size for e.g. 72x40 displays where buffer size is multiple of 8, not 16
block_size = 8;
if ((this->get_buffer_length_() % 24) == 0) {
// use 24 byte block size for e.g. 72x40 displays where buffer size is multiple of 24, not 16
block_size = 24;
}
for (uint32_t i = 0; i < this->get_buffer_length_();) {