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esp-idf/components/esp_lcd/src/esp_lcd_panel_st7789.c

318 wiersze
11 KiB
C
Czysty Wina Historia

/*
* SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdlib.h>
#include <sys/cdefs.h>
#include "sdkconfig.h"
#if CONFIG_LCD_ENABLE_DEBUG_LOG
// The local log level must be defined before including esp_log.h
// Set the maximum log level for this source file
#define LOG_LOCAL_LEVEL ESP_LOG_DEBUG
#endif
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_lcd_panel_interface.h"
#include "esp_lcd_panel_io.h"
#include "esp_lcd_panel_vendor.h"
#include "esp_lcd_panel_ops.h"
#include "esp_lcd_panel_commands.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "esp_check.h"
#define ST7789_CMD_RAMCTRL 0xb0
#define ST7789_DATA_LITTLE_ENDIAN_BIT (1 << 3)
static const char *TAG = "lcd_panel.st7789";
static esp_err_t panel_st7789_del(esp_lcd_panel_t *panel);
static esp_err_t panel_st7789_reset(esp_lcd_panel_t *panel);
static esp_err_t panel_st7789_init(esp_lcd_panel_t *panel);
static esp_err_t panel_st7789_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end,
const void *color_data);
static esp_err_t panel_st7789_invert_color(esp_lcd_panel_t *panel, bool invert_color_data);
static esp_err_t panel_st7789_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y);
static esp_err_t panel_st7789_swap_xy(esp_lcd_panel_t *panel, bool swap_axes);
static esp_err_t panel_st7789_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap);
static esp_err_t panel_st7789_disp_on_off(esp_lcd_panel_t *panel, bool off);
static esp_err_t panel_st7789_sleep(esp_lcd_panel_t *panel, bool sleep);
typedef struct {
esp_lcd_panel_t base;
esp_lcd_panel_io_handle_t io;
int reset_gpio_num;
bool reset_level;
int x_gap;
int y_gap;
uint8_t fb_bits_per_pixel;
uint8_t madctl_val; // save current value of LCD_CMD_MADCTL register
uint8_t colmod_val; // save current value of LCD_CMD_COLMOD register
uint8_t ramctl_val_1;
uint8_t ramctl_val_2;
} st7789_panel_t;
esp_err_t
esp_lcd_new_panel_st7789(const esp_lcd_panel_io_handle_t io, const esp_lcd_panel_dev_config_t *panel_dev_config,
esp_lcd_panel_handle_t *ret_panel)
{
#if CONFIG_LCD_ENABLE_DEBUG_LOG
esp_log_level_set(TAG, ESP_LOG_DEBUG);
#endif
esp_err_t ret = ESP_OK;
st7789_panel_t *st7789 = NULL;
ESP_GOTO_ON_FALSE(io && panel_dev_config && ret_panel, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
st7789 = calloc(1, sizeof(st7789_panel_t));
ESP_GOTO_ON_FALSE(st7789, ESP_ERR_NO_MEM, err, TAG, "no mem for st7789 panel");
if (panel_dev_config->reset_gpio_num >= 0) {
gpio_config_t io_conf = {
.mode = GPIO_MODE_OUTPUT,
.pin_bit_mask = 1ULL << panel_dev_config->reset_gpio_num,
};
ESP_GOTO_ON_ERROR(gpio_config(&io_conf), err, TAG, "configure GPIO for RST line failed");
}
switch (panel_dev_config->rgb_ele_order) {
case LCD_RGB_ELEMENT_ORDER_RGB:
st7789->madctl_val = 0;
break;
case LCD_RGB_ELEMENT_ORDER_BGR:
st7789->madctl_val |= LCD_CMD_BGR_BIT;
break;
default:
ESP_GOTO_ON_FALSE(false, ESP_ERR_NOT_SUPPORTED, err, TAG, "unsupported RGB element order");
break;
}
uint8_t fb_bits_per_pixel = 0;
switch (panel_dev_config->bits_per_pixel) {
case 16: // RGB565
st7789->colmod_val = 0x55;
fb_bits_per_pixel = 16;
break;
case 18: // RGB666
st7789->colmod_val = 0x66;
// each color component (R/G/B) should occupy the 6 high bits of a byte, which means 3 full bytes are required for a pixel
fb_bits_per_pixel = 24;
break;
default:
ESP_GOTO_ON_FALSE(false, ESP_ERR_NOT_SUPPORTED, err, TAG, "unsupported pixel width");
break;
}
st7789->ramctl_val_1 = 0x00;
st7789->ramctl_val_2 = 0xf0; // Use big endian by default
if ((panel_dev_config->data_endian) == LCD_RGB_DATA_ENDIAN_LITTLE) {
// Use little endian
st7789->ramctl_val_2 |= ST7789_DATA_LITTLE_ENDIAN_BIT;
}
st7789->io = io;
st7789->fb_bits_per_pixel = fb_bits_per_pixel;
st7789->reset_gpio_num = panel_dev_config->reset_gpio_num;
st7789->reset_level = panel_dev_config->flags.reset_active_high;
st7789->base.del = panel_st7789_del;
st7789->base.reset = panel_st7789_reset;
st7789->base.init = panel_st7789_init;
st7789->base.draw_bitmap = panel_st7789_draw_bitmap;
st7789->base.invert_color = panel_st7789_invert_color;
st7789->base.set_gap = panel_st7789_set_gap;
st7789->base.mirror = panel_st7789_mirror;
st7789->base.swap_xy = panel_st7789_swap_xy;
st7789->base.disp_on_off = panel_st7789_disp_on_off;
st7789->base.disp_sleep = panel_st7789_sleep;
*ret_panel = &(st7789->base);
ESP_LOGD(TAG, "new st7789 panel @%p", st7789);
return ESP_OK;
err:
if (st7789) {
if (panel_dev_config->reset_gpio_num >= 0) {
gpio_reset_pin(panel_dev_config->reset_gpio_num);
}
free(st7789);
}
return ret;
}
static esp_err_t panel_st7789_del(esp_lcd_panel_t *panel)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
if (st7789->reset_gpio_num >= 0) {
gpio_reset_pin(st7789->reset_gpio_num);
}
ESP_LOGD(TAG, "del st7789 panel @%p", st7789);
free(st7789);
return ESP_OK;
}
static esp_err_t panel_st7789_reset(esp_lcd_panel_t *panel)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
esp_lcd_panel_io_handle_t io = st7789->io;
// perform hardware reset
if (st7789->reset_gpio_num >= 0) {
gpio_set_level(st7789->reset_gpio_num, st7789->reset_level);
vTaskDelay(pdMS_TO_TICKS(10));
gpio_set_level(st7789->reset_gpio_num, !st7789->reset_level);
vTaskDelay(pdMS_TO_TICKS(10));
} else { // perform software reset
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, LCD_CMD_SWRESET, NULL, 0), TAG,
"io tx param failed");
vTaskDelay(pdMS_TO_TICKS(20)); // spec, wait at least 5m before sending new command
}
return ESP_OK;
}
static esp_err_t panel_st7789_init(esp_lcd_panel_t *panel)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
esp_lcd_panel_io_handle_t io = st7789->io;
// LCD goes into sleep mode and display will be turned off after power on reset, exit sleep mode first
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, LCD_CMD_SLPOUT, NULL, 0), TAG,
"io tx param failed");
vTaskDelay(pdMS_TO_TICKS(100));
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, LCD_CMD_MADCTL, (uint8_t[]) {
st7789->madctl_val,
}, 1), TAG, "io tx param failed");
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, LCD_CMD_COLMOD, (uint8_t[]) {
st7789->colmod_val,
}, 1), TAG, "io tx param failed");
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, ST7789_CMD_RAMCTRL, (uint8_t[]) {
st7789->ramctl_val_1, st7789->ramctl_val_2
}, 2), TAG, "io tx param failed");
return ESP_OK;
}
static esp_err_t panel_st7789_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end,
const void *color_data)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
assert((x_start < x_end) && (y_start < y_end) && "start position must be smaller than end position");
esp_lcd_panel_io_handle_t io = st7789->io;
x_start += st7789->x_gap;
x_end += st7789->x_gap;
y_start += st7789->y_gap;
y_end += st7789->y_gap;
// define an area of frame memory where MCU can access
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, LCD_CMD_CASET, (uint8_t[]) {
(x_start >> 8) & 0xFF,
x_start & 0xFF,
((x_end - 1) >> 8) & 0xFF,
(x_end - 1) & 0xFF,
}, 4), TAG, "io tx param failed");
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, LCD_CMD_RASET, (uint8_t[]) {
(y_start >> 8) & 0xFF,
y_start & 0xFF,
((y_end - 1) >> 8) & 0xFF,
(y_end - 1) & 0xFF,
}, 4), TAG, "io tx param failed");
// transfer frame buffer
size_t len = (x_end - x_start) * (y_end - y_start) * st7789->fb_bits_per_pixel / 8;
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_color(io, LCD_CMD_RAMWR, color_data, len), TAG, "io tx color failed");
return ESP_OK;
}
static esp_err_t panel_st7789_invert_color(esp_lcd_panel_t *panel, bool invert_color_data)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
esp_lcd_panel_io_handle_t io = st7789->io;
int command = 0;
if (invert_color_data) {
command = LCD_CMD_INVON;
} else {
command = LCD_CMD_INVOFF;
}
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, command, NULL, 0), TAG,
"io tx param failed");
return ESP_OK;
}
static esp_err_t panel_st7789_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
esp_lcd_panel_io_handle_t io = st7789->io;
if (mirror_x) {
st7789->madctl_val |= LCD_CMD_MX_BIT;
} else {
st7789->madctl_val &= ~LCD_CMD_MX_BIT;
}
if (mirror_y) {
st7789->madctl_val |= LCD_CMD_MY_BIT;
} else {
st7789->madctl_val &= ~LCD_CMD_MY_BIT;
}
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, LCD_CMD_MADCTL, (uint8_t[]) {
st7789->madctl_val
}, 1), TAG, "io tx param failed");
return ESP_OK;
}
static esp_err_t panel_st7789_swap_xy(esp_lcd_panel_t *panel, bool swap_axes)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
esp_lcd_panel_io_handle_t io = st7789->io;
if (swap_axes) {
st7789->madctl_val |= LCD_CMD_MV_BIT;
} else {
st7789->madctl_val &= ~LCD_CMD_MV_BIT;
}
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, LCD_CMD_MADCTL, (uint8_t[]) {
st7789->madctl_val
}, 1), TAG, "io tx param failed");
return ESP_OK;
}
static esp_err_t panel_st7789_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
st7789->x_gap = x_gap;
st7789->y_gap = y_gap;
return ESP_OK;
}
static esp_err_t panel_st7789_disp_on_off(esp_lcd_panel_t *panel, bool on_off)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
esp_lcd_panel_io_handle_t io = st7789->io;
int command = 0;
if (on_off) {
command = LCD_CMD_DISPON;
} else {
command = LCD_CMD_DISPOFF;
}
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, command, NULL, 0), TAG,
"io tx param failed");
return ESP_OK;
}
static esp_err_t panel_st7789_sleep(esp_lcd_panel_t *panel, bool sleep)
{
st7789_panel_t *st7789 = __containerof(panel, st7789_panel_t, base);
esp_lcd_panel_io_handle_t io = st7789->io;
int command = 0;
if (sleep) {
command = LCD_CMD_SLPIN;
} else {
command = LCD_CMD_SLPOUT;
}
ESP_RETURN_ON_ERROR(esp_lcd_panel_io_tx_param(io, command, NULL, 0), TAG,
"io tx param failed");
vTaskDelay(pdMS_TO_TICKS(100));
return ESP_OK;
}
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