driver: Updated ILI9340 driver to use display API
Updated ILI9340 display driver and sample application to make use off the display API Signed-off-by: Jan Van Winkel <jan.van_winkel@dxplore.eu>
This commit is contained in:
Jan Van Winkel
Anas Nashif
parent
7926a34a31
commit
d332ae5b6a
7 changed files with 194 additions and 90 deletions
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@ -1,7 +1,7 @@
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# Kconfig - ILI9340 display driver configuration options
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#
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# Copyright (c) 2017 dXplore
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# Copyright (c) 2017 Jan Van Winkel <jan.van_winkel@dxplore.eu>
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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@ -1,7 +1,7 @@
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# Kconfig - Microbit display driver configuration options
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#
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# Copyright (c) 2017 dXplore
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# Copyright (c) 2017 Jan Van Winkel <jan.van_winkel@dxplore.eu>
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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@ -1,10 +1,11 @@
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/* Copyright (c) 2017 dXplore
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/*
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* Copyright (c) 2017 Jan Van Winkel <jan.van_winkel@dxplore.eu>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "display_ili9340.h"
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#include <drivers/display/ili9340.h>
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#include <display.h>
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#define LOG_LEVEL CONFIG_LOG_ILI9340_LEVEL
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#include <logging/log.h>
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@ -13,6 +14,7 @@ LOG_MODULE_REGISTER(display);
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#include <gpio.h>
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#include <misc/byteorder.h>
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#include <spi.h>
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#include <string.h>
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struct ili9340_data {
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struct device *reset_gpio;
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@ -27,12 +29,13 @@ struct ili9340_data {
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#define ILI9340_CMD_DATA_PIN_COMMAND 0
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#define ILI9340_CMD_DATA_PIN_DATA 1
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static void ili9340_exit_sleep(struct ili9340_data *data);
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static void ili9340_set_mem_area(struct ili9340_data *data, const u16_t x,
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const u16_t y, const u16_t w, const u16_t h);
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static int ili9340_init(struct device *dev);
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static void ili9340_exit_sleep(struct ili9340_data *data)
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{
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ili9340_transmit(data, ILI9340_CMD_EXIT_SLEEP, NULL, 0);
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k_sleep(120);
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}
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int ili9340_init(struct device *dev)
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static int ili9340_init(struct device *dev)
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{
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struct ili9340_data *data = (struct ili9340_data *)dev->driver_data;
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@ -59,7 +62,7 @@ int ili9340_init(struct device *dev)
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#endif
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data->reset_gpio =
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device_get_binding(CONFIG_ILI9340_RESET_GPIO_PORT_NAME);
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device_get_binding(CONFIG_ILI9340_RESET_GPIO_PORT_NAME);
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if (data->reset_gpio == NULL) {
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LOG_ERR("Could not get GPIO port for ILI9340 reset");
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return -EPERM;
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@ -69,7 +72,7 @@ int ili9340_init(struct device *dev)
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GPIO_DIR_OUT);
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data->command_data_gpio =
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device_get_binding(CONFIG_ILI9340_CMD_DATA_GPIO_PORT_NAME);
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device_get_binding(CONFIG_ILI9340_CMD_DATA_GPIO_PORT_NAME);
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if (data->command_data_gpio == NULL) {
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LOG_ERR("Could not get GPIO port for ILI9340 command/data");
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return -EPERM;
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@ -92,57 +95,152 @@ int ili9340_init(struct device *dev)
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LOG_DBG("Exiting sleep mode");
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ili9340_exit_sleep(data);
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/* device_get_binding checks if driver_api is not zero before checking
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* device name.
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* So just set driver_api to 1 else the function call will fail
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*/
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dev->driver_api = (void *)1;
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return 0;
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}
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static void ili9340_set_mem_area(struct ili9340_data *data, const u16_t x,
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const u16_t y, const u16_t w, const u16_t h)
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{
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u16_t spi_data[2];
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spi_data[0] = sys_cpu_to_be16(x);
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spi_data[1] = sys_cpu_to_be16(x + w - 1);
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ili9340_transmit(data, ILI9340_CMD_COLUMN_ADDR, &spi_data[0], 4);
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spi_data[0] = sys_cpu_to_be16(y);
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spi_data[1] = sys_cpu_to_be16(y + h - 1);
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ili9340_transmit(data, ILI9340_CMD_PAGE_ADDR, &spi_data[0], 4);
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}
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static int ili9340_write(const struct device *dev, const u16_t x,
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const u16_t y,
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const struct display_buffer_descriptor *desc,
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const void *buf)
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{
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struct ili9340_data *data = (struct ili9340_data *)dev->driver_data;
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const u8_t *write_data_start = (u8_t *) buf;
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struct spi_buf tx_buf;
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struct spi_buf_set tx_bufs;
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u16_t write_cnt;
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u16_t nbr_of_writes;
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u16_t write_h;
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__ASSERT(desc->width <= desc->pitch, "Pitch is smaller then width");
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__ASSERT((3 * desc->pitch * desc->height) <= desc->bu_size,
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"Input buffer to small");
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LOG_DBG("Writing %dx%d (w,h) @ %dx%d (x,y)", desc->width, desc->height,
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x, y);
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ili9340_set_mem_area(data, x, y, desc->width, desc->height);
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if (desc->pitch > desc->width) {
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write_h = 1;
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nbr_of_writes = desc->height;
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} else {
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write_h = desc->height;
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nbr_of_writes = 1;
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}
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ili9340_transmit(data, ILI9340_CMD_MEM_WRITE,
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(void *) write_data_start, 3 * desc->width * write_h);
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tx_bufs.buffers = &tx_buf;
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tx_bufs.count = 1;
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write_data_start += (3 * desc->pitch);
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for (write_cnt = 1; write_cnt < nbr_of_writes; ++write_cnt) {
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tx_buf.buf = (void *)write_data_start;
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tx_buf.len = 3 * desc->width * write_h;
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spi_write(data->spi_dev, &data->spi_config, &tx_bufs);
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write_data_start += (3 * desc->pitch);
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}
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return 0;
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}
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void ili9340_write_pixel(const struct device *dev, const u16_t x, const u16_t y,
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const u8_t r, const u8_t g, const u8_t b)
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static int ili9340_read(const struct device *dev, const u16_t x,
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const u16_t y,
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const struct display_buffer_descriptor *desc,
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void *buf)
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{
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u8_t rgb_data[] = {r, g, b};
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LOG_DBG("Writing pixel @ %dx%d (x,y)", x, y);
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ili9340_write_bitmap(dev, x, y, 1, 1, &rgb_data[0]);
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LOG_ERR("Reading not supported");
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return -ENOTSUP;
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}
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void ili9340_write_bitmap(const struct device *dev, const u16_t x,
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const u16_t y, const u16_t w, const u16_t h,
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const u8_t *rgb_data)
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static void *ili9340_get_framebuffer(const struct device *dev)
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{
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LOG_ERR("Direct framebuffer access not supported");
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return NULL;
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}
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static int ili9340_display_blanking_off(const struct device *dev)
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{
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struct ili9340_data *data = (struct ili9340_data *)dev->driver_data;
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LOG_DBG("Writing %dx%d (w,h) bitmap @ %dx%d (x,y)", w, h, x, y);
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ili9340_set_mem_area(data, x, y, w, h);
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ili9340_transmit(data, ILI9340_CMD_MEM_WRITE, (void *)rgb_data,
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3 * w * h);
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}
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void ili9340_display_on(struct device *dev)
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{
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struct ili9340_data *data = (struct ili9340_data *)dev->driver_data;
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LOG_DBG("Turning display on");
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LOG_DBG("Turning display blanking off");
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ili9340_transmit(data, ILI9340_CMD_DISPLAY_ON, NULL, 0);
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return 0;
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}
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void ili9340_display_off(struct device *dev)
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static int ili9340_display_blanking_on(const struct device *dev)
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{
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struct ili9340_data *data = (struct ili9340_data *)dev->driver_data;
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LOG_DBG("Turning display off");
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LOG_DBG("Turning display blanking on");
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ili9340_transmit(data, ILI9340_CMD_DISPLAY_OFF, NULL, 0);
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return 0;
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}
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static int ili9340_set_brightness(const struct device *dev,
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const u8_t brightness)
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{
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LOG_WRN("Set brightness not implemented");
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return -ENOTSUP;
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}
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static int ili9340_set_contrast(const struct device *dev, const u8_t contrast)
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{
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LOG_ERR("Set contrast not supported");
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return -ENOTSUP;
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}
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static int ili9340_set_pixel_format(const struct device *dev,
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const enum display_pixel_format
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pixel_format)
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{
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if (pixel_format == PIXEL_FORMAT_RGB_888) {
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return 0;
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}
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LOG_ERR("Pixel format change not implemented");
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return -ENOTSUP;
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}
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static int ili9340_set_orientation(const struct device *dev,
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const enum display_orientation orientation)
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{
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if (orientation == DISPLAY_ORIENTATION_NORMAL) {
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return 0;
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}
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LOG_ERR("Changing display orientation not implemented");
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return -ENOTSUP;
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}
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static void ili9340_get_capabilities(const struct device *dev,
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struct display_capabilities *capabilities)
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{
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memset(capabilities, 0, sizeof(struct display_capabilities));
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capabilities->x_resolution = 320;
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capabilities->y_resolution = 240;
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capabilities->supported_pixel_formats = PIXEL_FORMAT_RGB_888;
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capabilities->current_pixel_format = PIXEL_FORMAT_RGB_888;
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capabilities->current_orientation = DISPLAY_ORIENTATION_NORMAL;
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}
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void ili9340_transmit(struct ili9340_data *data, u8_t cmd, void *tx_data,
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size_t tx_len)
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{
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struct spi_buf tx_buf = {.buf = &cmd, .len = 1};
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struct spi_buf_set tx_bufs = {.buffers = &tx_buf, .count = 1};
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struct spi_buf tx_buf = { .buf = &cmd, .len = 1 };
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struct spi_buf_set tx_bufs = { .buffers = &tx_buf, .count = 1 };
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gpio_pin_write(data->command_data_gpio, CONFIG_ILI9340_CMD_DATA_PIN,
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ILI9340_CMD_DATA_PIN_COMMAND);
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@ -158,27 +256,21 @@ void ili9340_transmit(struct ili9340_data *data, u8_t cmd, void *tx_data,
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}
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}
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void ili9340_exit_sleep(struct ili9340_data *data)
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{
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ili9340_transmit(data, ILI9340_CMD_EXIT_SLEEP, NULL, 0);
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k_sleep(120);
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}
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void ili9340_set_mem_area(struct ili9340_data *data, const u16_t x,
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const u16_t y, const u16_t w, const u16_t h)
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{
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u16_t spi_data[2];
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spi_data[0] = sys_cpu_to_be16(x);
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spi_data[1] = sys_cpu_to_be16(x + w - 1);
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ili9340_transmit(data, ILI9340_CMD_COLUMN_ADDR, &spi_data[0], 4);
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spi_data[0] = sys_cpu_to_be16(y);
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spi_data[1] = sys_cpu_to_be16(y + h - 1);
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ili9340_transmit(data, ILI9340_CMD_PAGE_ADDR, &spi_data[0], 4);
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}
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static const struct display_driver_api ili9340_api = {
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.blanking_on = ili9340_display_blanking_on,
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.blanking_off = ili9340_display_blanking_off,
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.write = ili9340_write,
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.read = ili9340_read,
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.get_framebuffer = ili9340_get_framebuffer,
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.set_brightness = ili9340_set_brightness,
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.set_contrast = ili9340_set_contrast,
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.get_capabilities = ili9340_get_capabilities,
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.set_pixel_format = ili9340_set_pixel_format,
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.set_orientation = ili9340_set_orientation,
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};
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static struct ili9340_data ili9340_data;
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DEVICE_INIT(ili9340, CONFIG_ILI9340_DEV_NAME, &ili9340_init, &ili9340_data,
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NULL, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
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DEVICE_AND_API_INIT(ili9340, CONFIG_ILI9340_DEV_NAME, &ili9340_init,
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&ili9340_data, NULL, APPLICATION,
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CONFIG_APPLICATION_INIT_PRIORITY, &ili9340_api);
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@ -1,4 +1,5 @@
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/* Copyright (c) 2017 dXplore
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/*
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* Copyright (c) 2017 Jan Van Winkel <jan.van_winkel@dxplore.eu>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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@ -1,4 +1,5 @@
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/* Copyright (c) 2017 dXplore
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/*
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* Copyright (c) 2017 Jan Van Winkel <jan.van_winkel@dxplore.eu>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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