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/*
* SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdlib.h>
#include <string.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 "esp_lcd_panel_io_interface.h"
#include "esp_lcd_panel_io.h"
#include "driver/i2c.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "esp_check.h"
#include "esp_compiler.h"
static const char *TAG = "lcd_panel.io.i2c";
#define CMD_HANDLER_BUFFER_SIZE I2C_LINK_RECOMMENDED_SIZE(2) // only 2 operations will be queued in the handler ATTOW
#define BYTESHIFT(VAR, IDX) (((VAR) >> ((IDX) * 8)) & 0xFF)
static esp_err_t panel_io_i2c_del(esp_lcd_panel_io_t *io);
static esp_err_t panel_io_i2c_rx_param(esp_lcd_panel_io_t *io, int lcd_cmd, void *param, size_t param_size);
static esp_err_t panel_io_i2c_tx_param(esp_lcd_panel_io_t *io, int lcd_cmd, const void *param, size_t param_size);
static esp_err_t panel_io_i2c_tx_color(esp_lcd_panel_io_t *io, int lcd_cmd, const void *color, size_t color_size);
static esp_err_t panel_io_i2c_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx);
typedef struct {
esp_lcd_panel_io_t base; // Base class of generic lcd panel io
uint32_t i2c_bus_id; // I2C bus id, indicating which I2C port
uint32_t dev_addr; // Device address
int lcd_cmd_bits; // Bit width of LCD command
int lcd_param_bits; // Bit width of LCD parameter
bool control_phase_enabled; // Is control phase enabled
uint32_t control_phase_cmd; // control byte when transferring command
uint32_t control_phase_data; // control byte when transferring data
esp_lcd_panel_io_color_trans_done_cb_t on_color_trans_done; // User register's callback, invoked when color data trans done
void *user_ctx; // User's private data, passed directly to callback on_color_trans_done()
uint8_t cmdlink_buffer[]; // pre-alloc I2C command link buffer, to be reused in all transactions
} lcd_panel_io_i2c_t;
esp_err_t esp_lcd_new_panel_io_i2c_v1(uint32_t bus, const esp_lcd_panel_io_i2c_config_t *io_config, esp_lcd_panel_io_handle_t *ret_io)
{
// leak detection of i2c_panel_io because saving i2c_panel_io->base address
ESP_COMPILER_DIAGNOSTIC_PUSH_IGNORE("-Wanalyzer-malloc-leak")
#if CONFIG_LCD_ENABLE_DEBUG_LOG
esp_log_level_set(TAG, ESP_LOG_DEBUG);
#endif
esp_err_t ret = ESP_OK;
lcd_panel_io_i2c_t *i2c_panel_io = NULL;
ESP_GOTO_ON_FALSE(io_config && ret_io, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
ESP_GOTO_ON_FALSE(io_config->control_phase_bytes * 8 > io_config->dc_bit_offset, ESP_ERR_INVALID_ARG, err, TAG, "D/C bit exceeds control bytes");
ESP_GOTO_ON_FALSE(io_config->scl_speed_hz == 0, ESP_ERR_INVALID_ARG, err, TAG, "scl_speed_hz is not need to set in legacy i2c_lcd driver");
i2c_panel_io = calloc(1, sizeof(lcd_panel_io_i2c_t) + CMD_HANDLER_BUFFER_SIZE); // expand zero-length array cmdlink_buffer
ESP_GOTO_ON_FALSE(i2c_panel_io, ESP_ERR_NO_MEM, err, TAG, "no mem for i2c panel io");
i2c_panel_io->i2c_bus_id = bus;
i2c_panel_io->lcd_cmd_bits = io_config->lcd_cmd_bits;
i2c_panel_io->lcd_param_bits = io_config->lcd_param_bits;
i2c_panel_io->on_color_trans_done = io_config->on_color_trans_done;
i2c_panel_io->user_ctx = io_config->user_ctx;
i2c_panel_io->control_phase_enabled = (!io_config->flags.disable_control_phase);
i2c_panel_io->control_phase_data = (!io_config->flags.dc_low_on_data) << (io_config->dc_bit_offset);
i2c_panel_io->control_phase_cmd = (io_config->flags.dc_low_on_data) << (io_config->dc_bit_offset);
i2c_panel_io->dev_addr = io_config->dev_addr;
i2c_panel_io->base.del = panel_io_i2c_del;
i2c_panel_io->base.rx_param = panel_io_i2c_rx_param;
i2c_panel_io->base.tx_param = panel_io_i2c_tx_param;
i2c_panel_io->base.tx_color = panel_io_i2c_tx_color;
i2c_panel_io->base.register_event_callbacks = panel_io_i2c_register_event_callbacks;
*ret_io = &(i2c_panel_io->base);
ESP_LOGD(TAG, "new i2c lcd panel io @%p", i2c_panel_io);
return ESP_OK;
err:
return ret;
ESP_COMPILER_DIAGNOSTIC_POP("-Wanalyzer-malloc-leak")
}
static esp_err_t panel_io_i2c_del(esp_lcd_panel_io_t *io)
{
esp_err_t ret = ESP_OK;
lcd_panel_io_i2c_t *i2c_panel_io = __containerof(io, lcd_panel_io_i2c_t, base);
ESP_LOGD(TAG, "del lcd panel i2c @%p", i2c_panel_io);
free(i2c_panel_io);
return ret;
}
static esp_err_t panel_io_i2c_register_event_callbacks(esp_lcd_panel_io_handle_t io, const esp_lcd_panel_io_callbacks_t *cbs, void *user_ctx)
{
lcd_panel_io_i2c_t *i2c_panel_io = __containerof(io, lcd_panel_io_i2c_t, base);
if (i2c_panel_io->on_color_trans_done != NULL) {
ESP_LOGW(TAG, "Callback on_color_trans_done was already set and now it was overwritten!");
}
i2c_panel_io->on_color_trans_done = cbs->on_color_trans_done;
i2c_panel_io->user_ctx = user_ctx;
return ESP_OK;
}
static esp_err_t panel_io_i2c_rx_buffer(esp_lcd_panel_io_t *io, int lcd_cmd, void *buffer, size_t buffer_size)
{
esp_err_t ret = ESP_OK;
lcd_panel_io_i2c_t *i2c_panel_io = __containerof(io, lcd_panel_io_i2c_t, base);
bool send_param = (lcd_cmd >= 0);
i2c_cmd_handle_t cmd_link = i2c_cmd_link_create_static(i2c_panel_io->cmdlink_buffer, CMD_HANDLER_BUFFER_SIZE);
ESP_GOTO_ON_FALSE(cmd_link, ESP_ERR_NO_MEM, err, TAG, "no mem for i2c cmd link");
ESP_GOTO_ON_ERROR(i2c_master_start(cmd_link), err, TAG, "issue start failed"); // start phase
ESP_GOTO_ON_ERROR(i2c_master_write_byte(cmd_link, (i2c_panel_io->dev_addr << 1) | I2C_MASTER_WRITE, true), err, TAG, "write address failed"); // address phase
if (send_param) {
if (i2c_panel_io->control_phase_enabled) {
ESP_GOTO_ON_ERROR(i2c_master_write_byte(cmd_link, i2c_panel_io->control_phase_cmd, true),
err, TAG, "write control phase failed"); // control phase
}
uint8_t cmds[4] = {BYTESHIFT(lcd_cmd, 3), BYTESHIFT(lcd_cmd, 2), BYTESHIFT(lcd_cmd, 1), BYTESHIFT(lcd_cmd, 0)};
size_t cmds_size = i2c_panel_io->lcd_cmd_bits / 8;
if (cmds_size > 0 && cmds_size <= sizeof(cmds)) {
ESP_GOTO_ON_ERROR(i2c_master_write(cmd_link, cmds + (sizeof(cmds) - cmds_size), cmds_size, true), err, TAG, "write LCD cmd failed");
}
}
if (buffer) {
ESP_GOTO_ON_ERROR(i2c_master_start(cmd_link), err, TAG, "issue start failed"); // start phase
ESP_GOTO_ON_ERROR(i2c_master_write_byte(cmd_link, (i2c_panel_io->dev_addr << 1) | I2C_MASTER_READ, true), err, TAG, "write address failed"); // address phase
ESP_GOTO_ON_ERROR(i2c_master_read(cmd_link, buffer, buffer_size, I2C_MASTER_LAST_NACK), err, TAG, "read data failed");
}
ESP_GOTO_ON_ERROR(i2c_master_stop(cmd_link), err, TAG, "issue stop failed"); // stop phase
ESP_GOTO_ON_ERROR(i2c_master_cmd_begin(i2c_panel_io->i2c_bus_id, cmd_link, portMAX_DELAY), err, TAG, "i2c transaction failed");
i2c_cmd_link_delete_static(cmd_link);
return ESP_OK;
err:
if (cmd_link) {
i2c_cmd_link_delete_static(cmd_link);
}
return ret;
}
static esp_err_t panel_io_i2c_tx_buffer(esp_lcd_panel_io_t *io, int lcd_cmd, const void *buffer, size_t buffer_size, bool is_param)
{
esp_err_t ret = ESP_OK;
lcd_panel_io_i2c_t *i2c_panel_io = __containerof(io, lcd_panel_io_i2c_t, base);
bool send_param = (lcd_cmd >= 0);
i2c_cmd_handle_t cmd_link = i2c_cmd_link_create_static(i2c_panel_io->cmdlink_buffer, CMD_HANDLER_BUFFER_SIZE);
ESP_GOTO_ON_FALSE(cmd_link, ESP_ERR_NO_MEM, err, TAG, "no mem for i2c cmd link");
ESP_GOTO_ON_ERROR(i2c_master_start(cmd_link), err, TAG, "issue start failed"); // start phase
ESP_GOTO_ON_ERROR(i2c_master_write_byte(cmd_link, (i2c_panel_io->dev_addr << 1) | I2C_MASTER_WRITE, true), err, TAG, "write address failed"); // address phase
if (i2c_panel_io->control_phase_enabled) {
ESP_GOTO_ON_ERROR(i2c_master_write_byte(cmd_link, is_param ? i2c_panel_io->control_phase_cmd : i2c_panel_io->control_phase_data, true),
err, TAG, "write control phase failed"); // control phase
}
// some displays don't want any additional commands on data transfers
if (send_param) {
uint8_t cmds[4] = {BYTESHIFT(lcd_cmd, 3), BYTESHIFT(lcd_cmd, 2), BYTESHIFT(lcd_cmd, 1), BYTESHIFT(lcd_cmd, 0)};
size_t cmds_size = i2c_panel_io->lcd_cmd_bits / 8;
if (cmds_size > 0 && cmds_size <= sizeof(cmds)) {
ESP_GOTO_ON_ERROR(i2c_master_write(cmd_link, cmds + (sizeof(cmds) - cmds_size), cmds_size, true), err, TAG, "write LCD cmd failed");
}
}
if (buffer) {
ESP_GOTO_ON_ERROR(i2c_master_write(cmd_link, buffer, buffer_size, true), err, TAG, "write data failed");
}
ESP_GOTO_ON_ERROR(i2c_master_stop(cmd_link), err, TAG, "issue stop failed"); // stop phase
ESP_GOTO_ON_ERROR(i2c_master_cmd_begin(i2c_panel_io->i2c_bus_id, cmd_link, portMAX_DELAY), err, TAG, "i2c transaction failed");
i2c_cmd_link_delete_static(cmd_link);
if (!is_param) {
// trans done callback
if (i2c_panel_io->on_color_trans_done) {
i2c_panel_io->on_color_trans_done(&(i2c_panel_io->base), NULL, i2c_panel_io->user_ctx);
}
}
return ESP_OK;
err:
if (cmd_link) {
i2c_cmd_link_delete_static(cmd_link);
}
return ret;
}
static esp_err_t panel_io_i2c_rx_param(esp_lcd_panel_io_t *io, int lcd_cmd, void *param, size_t param_size)
{
return panel_io_i2c_rx_buffer(io, lcd_cmd, param, param_size);
}
static esp_err_t panel_io_i2c_tx_param(esp_lcd_panel_io_t *io, int lcd_cmd, const void *param, size_t param_size)
{
return panel_io_i2c_tx_buffer(io, lcd_cmd, param, param_size, true);
}
static esp_err_t panel_io_i2c_tx_color(esp_lcd_panel_io_t *io, int lcd_cmd, const void *color, size_t color_size)
{
return panel_io_i2c_tx_buffer(io, lcd_cmd, color, color_size, false);
}
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