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lvgl: Add i2c interface driver
Driver for display that have I2C interface (SDD1306) Signed-off-by: Jerzy Kasenberg <[email protected]>
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‎hw/drivers/display/lcd_itf/itf_i2c/pkg.yml

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

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

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

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

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

‎hw/drivers/display/lcd_itf/pkg.yml

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

‎hw/drivers/display/lcd_itf/syscfg.yml

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choices:
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- custom
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- spi
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- i2c
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- 8080_II_8_bit
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- 8080_II_16_bit
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value: spi

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