Better u8g2 error handling and tuning to flags for perf

main/u8g2_esp32_hal.c

@@ -10,7 +10,7 @@
 #include "u8g2_esp32_hal.h"
 
 static const char *       TAG            = "u8g2_hal";
-static const unsigned int I2C_TIMEOUT_MS = 1000;
+static const unsigned int I2C_TIMEOUT_MS = 10;
 
 static spi_device_handle_t handle_spi;     // SPI handle.
 static i2c_cmd_handle_t    handle_i2c;     // I2C handle.
@@ -19,10 +19,11 @@ static u8g2_esp32_hal_t    u8g2_esp32_hal; // HAL state data.
 #undef ESP_ERROR_CHECK
 #define ESP_ERROR_CHECK(x)                                                                                             \
   do {                                                                                                                 \
-    esp_err_t rc = (x);                                                                                                \
-    if (rc != ESP_OK) {                                                                                                \
-      ESP_LOGE("err", "esp_err_t = %d", rc);                                                                           \
-      assert(0 && #x);                                                                                                 \
+    esp_err_t _rc = (x);                                                                                               \
+    if (_rc != ESP_OK) {                                                                                               \
+      const char *_error_name = esp_err_to_name(_rc);                                                                  \
+      ESP_LOGE(TAG, "%s failed: %s (%d)", #x, _error_name, _rc);                                                       \
+      return 0;                                                                                                        \
     }                                                                                                                  \
   } while (0);
 
@@ -136,8 +137,11 @@ uint8_t u8g2_esp32_i2c_byte_cb(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void
     ESP_LOGD(TAG, "i2c_param_config %d", conf.mode);
     ESP_ERROR_CHECK(i2c_param_config(I2C_MASTER_NUM, &conf));
     ESP_LOGD(TAG, "i2c_driver_install %d", I2C_MASTER_NUM);
-    ESP_ERROR_CHECK(
-        i2c_driver_install(I2C_MASTER_NUM, conf.mode, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0));
+    ESP_ERROR_CHECK(i2c_driver_install(I2C_MASTER_NUM,
+                                       conf.mode,
+                                       I2C_MASTER_RX_BUF_DISABLE,
+                                       I2C_MASTER_TX_BUF_DISABLE,
+                                       ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_LEVEL1));
     break;
   }
 
@@ -167,7 +171,7 @@ uint8_t u8g2_esp32_i2c_byte_cb(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void
   }
 
   case U8X8_MSG_BYTE_END_TRANSFER: {
-    // ESP_LOGV(TAG, "End I2C transfer. txbuf len: %d", txbuf_ptr - txbuf);
+    ESP_LOGV(TAG, "End I2C transfer. txbuf len: %d", txbuf_ptr - txbuf);
     // ESP_LOG_BUFFER_HEXDUMP(TAG, txbuf, txbuf_ptr - txbuf, ESP_LOG_VERBOSE);
     ESP_ERROR_CHECK(i2c_master_write(handle_i2c, txbuf, txbuf_ptr - txbuf, ACK_CHECK_EN));
     ESP_ERROR_CHECK(i2c_master_stop(handle_i2c));
@@ -175,8 +179,9 @@ uint8_t u8g2_esp32_i2c_byte_cb(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void
     i2c_cmd_link_delete(handle_i2c);
     break;
   }
+  default: return 0;
   }
-  return 0;
+  return 1;
 } // u8g2_esp32_i2c_byte_cb
 
 /*
@@ -243,6 +248,7 @@ uint8_t u8g2_esp32_gpio_and_delay_cb(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int,
 
     // Delay for the number of milliseconds passed in through arg_int.
   case U8X8_MSG_DELAY_MILLI: vTaskDelay(arg_int / portTICK_PERIOD_MS); break;
+  default: return 0;
   }
-  return 0;
+  return 1;
 } // u8g2_esp32_gpio_and_delay_cb