[st7701s] Add delay feature in init sequences (#7343)

esphome/components/st7701s/display.py

@@ -1,47 +1,39 @@
-import esphome.codegen as cg
-import esphome.config_validation as cv
 from esphome import pins
-from esphome.components import (
-    spi,
-    display,
-)
-from esphome.const import (
-    CONF_DC_PIN,
-    CONF_HSYNC_PIN,
-    CONF_RESET_PIN,
-    CONF_DATA_PINS,
-    CONF_ID,
-    CONF_DIMENSIONS,
-    CONF_VSYNC_PIN,
-    CONF_WIDTH,
-    CONF_HEIGHT,
-    CONF_LAMBDA,
-    CONF_MIRROR_X,
-    CONF_MIRROR_Y,
-    CONF_COLOR_ORDER,
-    CONF_TRANSFORM,
-    CONF_OFFSET_HEIGHT,
-    CONF_OFFSET_WIDTH,
-    CONF_INVERT_COLORS,
-    CONF_RED,
-    CONF_GREEN,
-    CONF_BLUE,
-    CONF_NUMBER,
-    CONF_IGNORE_STRAPPING_WARNING,
-)
-
-from esphome.components.esp32 import (
-    only_on_variant,
-    const,
-)
+import esphome.codegen as cg
+from esphome.components import display, spi
+from esphome.components.esp32 import const, only_on_variant
 from esphome.components.rpi_dpi_rgb.display import (
     CONF_PCLK_FREQUENCY,
     CONF_PCLK_INVERTED,
 )
-from .init_sequences import (
-    ST7701S_INITS,
-    cmd,
+import esphome.config_validation as cv
+from esphome.const import (
+    CONF_BLUE,
+    CONF_COLOR_ORDER,
+    CONF_DATA_PINS,
+    CONF_DC_PIN,
+    CONF_DIMENSIONS,
+    CONF_GREEN,
+    CONF_HEIGHT,
+    CONF_HSYNC_PIN,
+    CONF_ID,
+    CONF_IGNORE_STRAPPING_WARNING,
+    CONF_INVERT_COLORS,
+    CONF_LAMBDA,
+    CONF_MIRROR_X,
+    CONF_MIRROR_Y,
+    CONF_NUMBER,
+    CONF_OFFSET_HEIGHT,
+    CONF_OFFSET_WIDTH,
+    CONF_RED,
+    CONF_RESET_PIN,
+    CONF_TRANSFORM,
+    CONF_VSYNC_PIN,
+    CONF_WIDTH,
 )
+from esphome.core import TimePeriod
+
+from .init_sequences import ST7701S_INITS, cmd
 
 CONF_INIT_SEQUENCE = "init_sequence"
 CONF_DE_PIN = "de_pin"
@@ -59,6 +51,7 @@ DEPENDENCIES = ["spi", "esp32"]
 st7701s_ns = cg.esphome_ns.namespace("st7701s")
 ST7701S = st7701s_ns.class_("ST7701S", display.Display, cg.Component, spi.SPIDevice)
 ColorOrder = display.display_ns.enum("ColorMode")
+ST7701S_DELAY_FLAG = 0xFF
 
 COLOR_ORDERS = {
     "RGB": ColorOrder.COLOR_ORDER_RGB,
@@ -93,18 +86,23 @@ def map_sequence(value):
     """
     An initialisation sequence can be selected from one of the pre-defined sequences in init_sequences.py,
     or can be a literal array of data bytes.
-    The format is a repeated sequence of [CMD, LEN, <data>] where <data> is LEN bytes.
+    The format is a repeated sequence of [CMD, <data>] where <data> is s a sequence of bytes. The length is inferred
+    from the length of the sequence and should not be explicit.
+    A delay can be inserted by specifying "- delay N" where N is in ms
     """
+    if isinstance(value, str) and value.lower().startswith("delay "):
+        value = value.lower()[6:]
+        delay = cv.All(
+            cv.positive_time_period_milliseconds,
+            cv.Range(TimePeriod(milliseconds=1), TimePeriod(milliseconds=255)),
+        )(value)
+        return [delay, ST7701S_DELAY_FLAG]
     if not isinstance(value, list):
         value = cv.int_(value)
         value = cv.one_of(*ST7701S_INITS)(value)
         return ST7701S_INITS[value]
-    # value = cv.ensure_list(cv.uint8_t)(value)
-    data_length = len(value)
-    if data_length == 0:
-        raise cv.Invalid("Empty sequence")
-    value = cmd(*value)
-    return value
+    value = cv.Length(min=1, max=254)(value)
+    return cmd(*value)
 
 
 CONFIG_SCHEMA = cv.All(

esphome/components/st7701s/st7701s.cpp

@@ -138,11 +138,16 @@ void ST7701S::write_init_sequence_() {
   for (size_t i = 0; i != this->init_sequence_.size();) {
     uint8_t cmd = this->init_sequence_[i++];
     size_t len = this->init_sequence_[i++];
-    this->write_sequence_(cmd, len, &this->init_sequence_[i]);
-    i += len;
-    esph_log_v(TAG, "Command %X, %d bytes", cmd, len);
-    if (cmd == SW_RESET_CMD)
-      delay(6);
+    if (len == ST7701S_DELAY_FLAG) {
+      ESP_LOGV(TAG, "Delay %dms", cmd);
+      delay(cmd);
+    } else {
+      this->write_sequence_(cmd, len, &this->init_sequence_[i]);
+      i += len;
+      ESP_LOGV(TAG, "Command %X, %d bytes", cmd, len);
+      if (cmd == SW_RESET_CMD)
+        delay(6);
+    }
   }
   // st7701 does not appear to support axis swapping
   this->write_sequence_(CMD2_BKSEL, sizeof(CMD2_BK0), CMD2_BK0);
@@ -153,7 +158,7 @@ void ST7701S::write_init_sequence_() {
     val |= 0x10;
   this->write_command_(MADCTL_CMD);
   this->write_data_(val);
-  esph_log_d(TAG, "write MADCTL %X", val);
+  ESP_LOGD(TAG, "write MADCTL %X", val);
   this->write_command_(this->invert_colors_ ? INVERT_ON : INVERT_OFF);
   this->set_timeout(120, [this] {
     this->write_command_(SLEEP_OUT);

esphome/components/st7701s/st7701s.h

@@ -25,6 +25,7 @@ const uint8_t INVERT_ON = 0x21;
 const uint8_t DISPLAY_ON = 0x29;
 const uint8_t CMD2_BKSEL = 0xFF;
 const uint8_t CMD2_BK0[5] = {0x77, 0x01, 0x00, 0x00, 0x10};
+const uint8_t ST7701S_DELAY_FLAG = 0xFF;
 
 class ST7701S : public display::Display,
                 public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW, spi::CLOCK_PHASE_LEADING,

tests/components/st7701s/common.yaml

@@ -38,7 +38,12 @@ display:
     hsync_pin: 16
     vsync_pin: 17
     pclk_pin: 21
-    init_sequence: 1
+    init_sequence:
+      - 1
+      - [0x23, 0xA, 0xB]
+      - delay 20ms
+      - [0x23, 0xA, 0xB]
+      - delay 0.2s
     data_pins:
       - number: 0
         ignore_strapping_warning: true