fix: backlighting not on

README.md

@@ -89,7 +89,7 @@ void app_main(void)
 #else
     pcf8574_init_config.i2c_handle = i2c_bus_handle;
 #endif
-    pcf8574_init_config.i2c_address = 0x38;
+    pcf8574_init_config.i2c_address = 0x27;
     zh_pcf8574_init(&pcf8574_init_config, &lcd_1602a_handle);
     zh_1602a_init(&lcd_1602a_handle);
     for (;;)
@@ -107,6 +107,7 @@ void app_main(void)
             zh_1602a_print_int(&lcd_1602a_handle, i);
             zh_1602a_print_char(&lcd_1602a_handle, "%");
             zh_1602a_print_progress_bar(&lcd_1602a_handle, 1, i);
+            vTaskDelay(100 / portTICK_PERIOD_MS);
         }
         vTaskDelay(5000 / portTICK_PERIOD_MS);
         zh_1602a_lcd_clear(&lcd_1602a_handle);

version.txt

@@ -1 +1 @@
-1.0.0
+1.0.2

zh_1602a_i2c.c

@@ -14,11 +14,17 @@ static const char *TAG = "zh_1602a_i2c";
         return err;                             \
     }
 
+#ifdef CONFIG_IDF_TARGET_ESP8266
+#define esp_delay_us(x) os_delay_us(x)
+#else
+#define esp_delay_us(x) esp_rom_delay_us(x)
+#endif
+
 #define LCD_1602A_PULSE                      \
     zh_pcf8574_write_gpio(handle, 2, true);  \
-    vTaskDelay(10 / portTICK_PERIOD_MS);     \
+    esp_delay_us(300);                       \
     zh_pcf8574_write_gpio(handle, 2, false); \
-    vTaskDelay(10 / portTICK_PERIOD_MS);
+    esp_delay_us(400);
 
 static void _zh_1602a_lcd_init(zh_pcf8574_handle_t *handle);
 static void _zh_1602a_send_command(zh_pcf8574_handle_t *handle, uint8_t command);
@@ -150,16 +156,16 @@ static void _zh_1602a_lcd_init(zh_pcf8574_handle_t *handle)
 
 static void _zh_1602a_send_command(zh_pcf8574_handle_t *handle, uint8_t command)
 {
-    zh_pcf8574_write(handle, (command & 0xF0));
+    zh_pcf8574_write(handle, (command & 0xF0) | 0x08);
     LCD_1602A_PULSE;
-    zh_pcf8574_write(handle, command << 4);
+    zh_pcf8574_write(handle, (command << 4) | 0x08);
     LCD_1602A_PULSE;
 }
 
 static void _zh_1602a_send_data(zh_pcf8574_handle_t *handle, uint8_t data)
 {
-    zh_pcf8574_write(handle, (data & 0xF0) | 0x01);
+    zh_pcf8574_write(handle, (data & 0xF0) | 0x09);
     LCD_1602A_PULSE;
-    zh_pcf8574_write(handle, (data << 4) | 0x01);
+    zh_pcf8574_write(handle, (data << 4) | 0x09);
     LCD_1602A_PULSE;
 }