lvgl: Add i2c interface driver

Driver for display that have I2C interface (SDD1306)

Signed-off-by: Jerzy Kasenberg <[email protected]>

hw/drivers/display/lcd_itf/itf_i2c/pkg.yml

@@ -0,0 +1,29 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+pkg.name: hw/drivers/display/lcd_itf/itf_i2c
+pkg.description: LCD Standard I2C interface
+pkg.keywords:
+    - display
+
+pkg.apis:
+    - lcd_interface
+
+pkg.deps:
+#    - "@apache-mynewt-core/hw/bus/drivers/i2c_common"

hw/drivers/display/lcd_itf/itf_i2c/src/itf_i2c.c

@@ -0,0 +1,96 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <bsp/bsp.h>
+#if MYNEWT_PKG_apache_mynewt_core__hw_bus_drivers_i2c_common
+#include <bus/drivers/i2c_common.h>
+#else
+#include <hal/hal_i2c.h>
+#endif
+
+#include <lv_conf.h>
+#include <lcd_itf.h>
+
+#if MYNEWT_PKG_apache_mynewt_core__hw_bus_drivers_i2c_common
+static struct bus_i2c_node lcd;
+static struct bus_i2c_node_cfg lcd_i2c_cfg = {
+    .node_cfg.bus_name = MYNEWT_VAL(LCD_I2C_DEV_NAME),
+    .addr = MYNEWT_VAL(LCD_I2C_ADDR),
+    .freq = MYNEWT_VAL(LCD_I2C_FREQ),
+};
+static struct os_dev *lcd_dev;
+#else
+#endif
+
+void
+lcd_itf_write_color_data(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, void *pixels)
+{
+    uint8_t *color_data = pixels;
+    size_t size = ((x2 - x1 + 1) * (y2 - y1 + 1)) >> 3;
+
+#if MYNEWT_PKG_apache_mynewt_core__hw_bus_drivers_i2c_common
+    color_data[-1] = 0x40;
+    bus_node_write(lcd_dev, color_data - 1, size + 1, 1000, 0);
+#else
+    color_data[-1] = 0x40;
+    struct hal_i2c_master_data data = {
+            .address = MYNEWT_VAL(LCD_I2C_ADDR),
+            .buffer = color_data - 1,
+            .len = size + 1,
+    };
+    hal_i2c_master_write(0, &data, 1000, 1);
+#endif
+}
+
+void
+lcd_ift_write_cmd(const uint8_t *cmd, int cmd_length)
+{
+    uint8_t buf[cmd_length + 1];
+
+    buf[0] = 0;
+    for (int i = 0; i < cmd_length; ++i) {
+        buf[i + 1] = cmd[i];
+    }
+#if MYNEWT_PKG_apache_mynewt_core__hw_bus_drivers_i2c_common
+    bus_node_write(lcd_dev, buf, cmd_length + 1, 1000, 0);
+#else
+    struct hal_i2c_master_data data = {
+            .address = MYNEWT_VAL(LCD_I2C_ADDR),
+            .buffer = buf,
+            .len = cmd_length + 1,
+    };
+    hal_i2c_master_write(0, &data, 1000, 1);
+#endif
+}
+
+
+void
+lcd_itf_init(void)
+{
+#if MYNEWT_PKG_apache_mynewt_core__hw_bus_drivers_i2c_common
+    int rc;
+    struct bus_node_callbacks cbs = {};
+
+    bus_node_set_callbacks((struct os_dev *)&lcd, &cbs);
+
+    rc = bus_i2c_node_create("display", &lcd, &lcd_i2c_cfg, NULL);
+    assert(rc == 0);
+    lcd_dev = os_dev_open("display", 0, NULL);
+#endif
+}

hw/drivers/display/lcd_itf/itf_i2c/syscfg.yml

@@ -0,0 +1,34 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+syscfg.defs:
+    LCD_I2C_DEV_NAME:
+        description: I2C device name that LCD is connected to.
+        value: '"i2c0"'
+    LCD_I2C_ADDR:
+        description: LCD I2C address.
+        value:
+        restriction: $notnull
+    LCD_I2C_FREQ:
+        description: I2C device frequency for LCD (typical 100/400 kHz)
+        value: 100
+    LCD_I2C_MAX_TRANSFER:
+        description: Maximum nuber of bytes that I2C interface supports
+        value:
+
+syscfg.restrictions:

hw/drivers/display/lcd_itf/pkg.yml

@@ -28,6 +28,8 @@ pkg.req_apis:
 
 pkg.deps.'LCD_ITF == "spi"':
     - "@apache-mynewt-core/hw/drivers/display/lcd_itf/itf_spi"
+pkg.deps.'LCD_ITF == "i2c"':
+    - "@apache-mynewt-core/hw/drivers/display/lcd_itf/itf_i2c"
 pkg.deps.'LCD_ITF == "8080_II_8_bit"':
     - "@apache-mynewt-core/hw/drivers/display/lcd_itf/itf_8080"
 pkg.deps.'LCD_ITF == "8080_II_16_bit"':

hw/drivers/display/lcd_itf/syscfg.yml

@@ -23,6 +23,7 @@ syscfg.defs:
         choices:
             - custom
             - spi
+            - i2c
             - 8080_II_8_bit
             - 8080_II_16_bit
         value: spi