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fixed misaligned data transfer for ssd1306

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(cherry picked from commit 46a2bf8ac9)
This commit is contained in:
Slamy 2022-06-22 21:10:21 +02:00 committed by morris
parent ee771c1d08
commit 256945997d
2 changed files with 10 additions and 5 deletions
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13
components/esp_lcd/src/esp_lcd_panel_io_i2c.c
View File

@ -141,10 +141,15 @@ static esp_err_t panel_io_i2c_tx_buffer(esp_lcd_panel_io_t *io, int lcd_cmd, con
ESP_GOTO_ON_ERROR(i2c_master_write_byte(cmd_link, is_param ? i2c_panel_io->control_phase_cmd : i2c_panel_io->control_phase_data, true),
err, TAG, "write control phase failed"); // control phase
}
uint8_t cmds[4] = {BYTESHIFT(lcd_cmd, 3), BYTESHIFT(lcd_cmd, 2), BYTESHIFT(lcd_cmd, 1), BYTESHIFT(lcd_cmd, 0)};
size_t cmds_size = i2c_panel_io->lcd_cmd_bits / 8;
if (cmds_size > 0 && cmds_size <= sizeof(cmds)) {
ESP_GOTO_ON_ERROR(i2c_master_write(cmd_link, cmds + (sizeof(cmds) - cmds_size), cmds_size, true), err, TAG, "write LCD cmd failed");
// some displays don't want any additional commands on data transfers
if (lcd_cmd != -1)
{
uint8_t cmds[4] = {BYTESHIFT(lcd_cmd, 3), BYTESHIFT(lcd_cmd, 2), BYTESHIFT(lcd_cmd, 1), BYTESHIFT(lcd_cmd, 0)};
size_t cmds_size = i2c_panel_io->lcd_cmd_bits / 8;
if (cmds_size > 0 && cmds_size <= sizeof(cmds)) {
ESP_GOTO_ON_ERROR(i2c_master_write(cmd_link, cmds + (sizeof(cmds) - cmds_size), cmds_size, true), err, TAG, "write LCD cmd failed");
}
}
if (buffer) {

2
components/esp_lcd/src/esp_lcd_panel_ssd1306.c
View File

@ -171,7 +171,7 @@ static esp_err_t panel_ssd1306_draw_bitmap(esp_lcd_panel_t *panel, int x_start,
}, 2);
// transfer frame buffer
size_t len = (y_end - y_start) * (x_end - x_start) * ssd1306->bits_per_pixel / 8;
esp_lcd_panel_io_tx_color(io, 0, color_data, len);
esp_lcd_panel_io_tx_color(io, -1, color_data, len);
return ESP_OK;
}