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Tactility/Platforms/platform-esp32/source/drivers/esp32_i2s.cpp
Ken Van Hoeylandt 9a11e6f47b
Implement UI scaling and more (#501) 
**New Features**
 * Runtime font accessors and new symbol fonts for text, launcher, statusbar, and shared icons.
 * Added font height base setting to device.properties
 * Text fonts now have 3 sizes: small, default, large

**Improvements**
 * Renamed `UiScale` to `UiDensity`
 * Statusbar, toolbar and many UI components now compute heights and spacing from fonts/density.
 * SSD1306 initialization sequence refined for more stable startup.
 * Multiple image assets replaced by symbol-font rendering.
 * Many layout improvements related to density, font scaling and icon scaling
 * Updated folder name capitalization for newer style
2026-02-15 01:41:47 +01:00

304 lines
10 KiB
C++
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// SPDX-License-Identifier: Apache-2.0
#include <driver/i2s_std.h>
#include <driver/i2s_common.h>
#include <tactility/driver.h>
#include <tactility/drivers/gpio_controller.h>
#include <tactility/drivers/gpio_descriptor.h>
#include <tactility/drivers/i2s_controller.h>
#include <tactility/log.h>
#include <tactility/time.h>
#include <tactility/error_esp32.h>
#include <tactility/drivers/esp32_gpio_helpers.h>
#include <tactility/drivers/esp32_i2s.h>
#include <new>
#define TAG "esp32_i2s"
struct Esp32I2sInternal {
Mutex mutex {};
I2sConfig config {};
bool config_set = false;
GpioDescriptor* bclk_descriptor = nullptr;
GpioDescriptor* ws_descriptor = nullptr;
GpioDescriptor* data_out_descriptor = nullptr;
GpioDescriptor* data_in_descriptor = nullptr;
GpioDescriptor* mclk_descriptor = nullptr;
i2s_chan_handle_t tx_handle = nullptr;
i2s_chan_handle_t rx_handle = nullptr;
Esp32I2sInternal() {
mutex_construct(&mutex);
}
~Esp32I2sInternal() {
cleanup_pins();
mutex_destruct(&mutex);
}
void cleanup_pins() {
release_pin(&bclk_descriptor);
release_pin(&ws_descriptor);
release_pin(&data_out_descriptor);
release_pin(&data_in_descriptor);
release_pin(&mclk_descriptor);
}
bool init_pins(Esp32I2sConfig* dts_config) {
check (!ws_descriptor && !bclk_descriptor && !data_out_descriptor && !data_in_descriptor && !mclk_descriptor);
auto& ws_spec = dts_config->pin_ws;
auto& bclk_spec = dts_config->pin_bclk;
auto& data_in_spec = dts_config->pin_data_in;
auto& data_out_spec = dts_config->pin_data_out;
auto& mclk_spec = dts_config->pin_mclk;
bool success = acquire_pin_or_set_null(ws_spec, &ws_descriptor) &&
acquire_pin_or_set_null(bclk_spec, &bclk_descriptor) &&
acquire_pin_or_set_null(data_in_spec, &data_in_descriptor) &&
acquire_pin_or_set_null(data_out_spec, &data_out_descriptor) &&
acquire_pin_or_set_null(mclk_spec, &mclk_descriptor);
if (!success) {
cleanup_pins();
LOG_E(TAG, "Failed to acquire all pins");
return false;
}
return true;
}
};
#define GET_CONFIG(device) ((Esp32I2sConfig*)(device)->config)
#define GET_DATA(device) ((Esp32I2sInternal*)device_get_driver_data(device))
#define lock(data) mutex_lock(&data->mutex);
#define unlock(data) mutex_unlock(&data->mutex);
extern "C" {
static error_t cleanup_channel_handles(Esp32I2sInternal* driver_data) {
// TODO: error handling of i2ss functions
if (driver_data->tx_handle) {
i2s_channel_disable(driver_data->tx_handle);
i2s_del_channel(driver_data->tx_handle);
driver_data->tx_handle = nullptr;
}
if (driver_data->rx_handle) {
i2s_channel_disable(driver_data->rx_handle);
i2s_del_channel(driver_data->rx_handle);
driver_data->rx_handle = nullptr;
}
return ERROR_NONE;
}
static i2s_data_bit_width_t to_esp32_bits_per_sample(uint8_t bits) {
switch (bits) {
case 8: return I2S_DATA_BIT_WIDTH_8BIT;
case 16: return I2S_DATA_BIT_WIDTH_16BIT;
case 24: return I2S_DATA_BIT_WIDTH_24BIT;
case 32: return I2S_DATA_BIT_WIDTH_32BIT;
default: return I2S_DATA_BIT_WIDTH_16BIT;
}
}
static void get_esp32_std_config(Esp32I2sInternal* internal, const I2sConfig* config, i2s_std_config_t* std_cfg) {
std_cfg->clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(config->sample_rate);
std_cfg->slot_cfg = I2S_STD_PHILIPS_SLOT_DEFAULT_CONFIG(to_esp32_bits_per_sample(config->bits_per_sample), I2S_SLOT_MODE_STEREO);
if (config->communication_format & I2S_FORMAT_STAND_MSB) {
std_cfg->slot_cfg = I2S_STD_MSB_SLOT_DEFAULT_CONFIG(to_esp32_bits_per_sample(config->bits_per_sample), I2S_SLOT_MODE_STEREO);
} else if (config->communication_format & (I2S_FORMAT_STAND_PCM_SHORT | I2S_FORMAT_STAND_PCM_LONG)) {
std_cfg->slot_cfg = I2S_STD_PCM_SLOT_DEFAULT_CONFIG(to_esp32_bits_per_sample(config->bits_per_sample), I2S_SLOT_MODE_STEREO);
}
if (config->channel_left != I2S_CHANNEL_NONE && config->channel_right == I2S_CHANNEL_NONE) {
std_cfg->slot_cfg.slot_mask = I2S_STD_SLOT_LEFT;
} else if (config->channel_left == I2S_CHANNEL_NONE && config->channel_right != I2S_CHANNEL_NONE) {
std_cfg->slot_cfg.slot_mask = I2S_STD_SLOT_RIGHT;
} else {
std_cfg->slot_cfg.slot_mask = I2S_STD_SLOT_BOTH;
}
gpio_num_t mclk_pin = get_native_pin(internal->mclk_descriptor);
gpio_num_t bclk_pin = get_native_pin(internal->bclk_descriptor);
gpio_num_t ws_pin = get_native_pin(internal->ws_descriptor);
gpio_num_t data_out_pin = get_native_pin(internal->data_out_descriptor);
gpio_num_t data_in_pin = get_native_pin(internal->data_in_descriptor);
LOG_I(TAG, "Configuring I2S pins: MCLK=%d, BCLK=%d, WS=%d, DATA_OUT=%d, DATA_IN=%d", mclk_pin, bclk_pin, ws_pin, data_out_pin, data_in_pin);
bool mclk_inverted = is_pin_inverted(internal->mclk_descriptor);
bool bclk_inverted = is_pin_inverted(internal->bclk_descriptor);
bool ws_inverted = is_pin_inverted(internal->ws_descriptor);
LOG_I(TAG, "Inverted pins: MCLK=%u, BCLK=%u, WS=%u", mclk_inverted, bclk_inverted, ws_inverted);
std_cfg->gpio_cfg = {
.mclk = mclk_pin,
.bclk = bclk_pin,
.ws = ws_pin,
.dout = data_out_pin,
.din = data_in_pin,
.invert_flags = {
.mclk_inv = mclk_inverted,
.bclk_inv = bclk_inverted,
.ws_inv = ws_inverted
}
};
}
static error_t read(Device* device, void* data, size_t data_size, size_t* bytes_read, TickType_t timeout) {
if (xPortInIsrContext()) return ERROR_ISR_STATUS;
auto* driver_data = GET_DATA(device);
if (!driver_data->rx_handle) return ERROR_NOT_SUPPORTED;
lock(driver_data);
const esp_err_t esp_error = i2s_channel_read(driver_data->rx_handle, data, data_size, bytes_read, timeout);
unlock(driver_data);
return esp_err_to_error(esp_error);
}
static error_t write(Device* device, const void* data, size_t data_size, size_t* bytes_written, TickType_t timeout) {
if (xPortInIsrContext()) return ERROR_ISR_STATUS;
auto* driver_data = GET_DATA(device);
if (!driver_data->tx_handle) return ERROR_NOT_SUPPORTED;
lock(driver_data);
const esp_err_t esp_error = i2s_channel_write(driver_data->tx_handle, data, data_size, bytes_written, timeout);
unlock(driver_data);
return esp_err_to_error(esp_error);
}
static error_t set_config(Device* device, const struct I2sConfig* config) {
if (xPortInIsrContext()) return ERROR_ISR_STATUS;
if (
config->bits_per_sample != 8 &&
config->bits_per_sample != 16 &&
config->bits_per_sample != 24 &&
config->bits_per_sample != 32
) {
return ERROR_INVALID_ARGUMENT;
}
auto* internal = GET_DATA(device);
auto* dts_config = GET_CONFIG(device);
lock(internal);
cleanup_channel_handles(internal);
internal->config_set = false;
// Create new channel handles
i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG(dts_config->port, I2S_ROLE_MASTER);
esp_err_t esp_error = i2s_new_channel(&chan_cfg, &internal->tx_handle, &internal->rx_handle);
if (esp_error != ESP_OK) {
LOG_E(TAG, "Failed to create I2S channels: %s", esp_err_to_name(esp_error));
unlock(internal);
return ERROR_RESOURCE;
}
i2s_std_config_t std_cfg = {};
get_esp32_std_config(internal, config, &std_cfg);
if (internal->tx_handle) {
esp_error = i2s_channel_init_std_mode(internal->tx_handle, &std_cfg);
if (esp_error == ESP_OK) esp_error = i2s_channel_enable(internal->tx_handle);
}
if (esp_error == ESP_OK && internal->rx_handle) {
esp_error = i2s_channel_init_std_mode(internal->rx_handle, &std_cfg);
if (esp_error == ESP_OK) esp_error = i2s_channel_enable(internal->rx_handle);
}
if (esp_error != ESP_OK) {
LOG_E(TAG, "Failed to initialize/enable I2S channels: %s", esp_err_to_name(esp_error));
cleanup_channel_handles(internal);
unlock(internal);
return esp_err_to_error(esp_error);
}
// Update runtime config to reflect current state
memcpy(&internal->config, config, sizeof(I2sConfig));
internal->config_set = true;
unlock(internal);
return ERROR_NONE;
}
static error_t get_config(Device* device, struct I2sConfig* config) {
auto* driver_data = GET_DATA(device);
lock(driver_data);
if (!driver_data->config_set) {
unlock(driver_data);
return ERROR_RESOURCE;
}
memcpy(config, &driver_data->config, sizeof(I2sConfig));
unlock(driver_data);
return ERROR_NONE;
}
static error_t start(Device* device) {
ESP_LOGI(TAG, "start %s", device->name);
auto* dts_config = GET_CONFIG(device);
auto* data = new(std::nothrow) Esp32I2sInternal();
if (!data) return ERROR_OUT_OF_MEMORY;
if (!data->init_pins(dts_config)) {
LOG_E(TAG, "Failed to init one or more pins");
delete data;
return ERROR_RESOURCE;
}
device_set_driver_data(device, data);
return ERROR_NONE;
}
static error_t stop(Device* device) {
ESP_LOGI(TAG, "stop %s", device->name);
auto* driver_data = GET_DATA(device);
lock(driver_data);
cleanup_channel_handles(driver_data);
unlock(driver_data);
device_set_driver_data(device, nullptr);
delete driver_data;
return ERROR_NONE;
}
static error_t reset(Device* device) {
ESP_LOGI(TAG, "reset %s", device->name);
auto* driver_data = GET_DATA(device);
lock(driver_data);
cleanup_channel_handles(driver_data);
unlock(driver_data);
return ERROR_NONE;
}
const static I2sControllerApi esp32_i2s_api = {
.read = read,
.write = write,
.set_config = set_config,
.get_config = get_config,
.reset = reset
};
extern struct Module platform_module;
Driver esp32_i2s_driver = {
.name = "esp32_i2s",
.compatible = (const char*[]) { "espressif,esp32-i2s", nullptr },
.start_device = start,
.stop_device = stop,
.api = (void*)&esp32_i2s_api,
.device_type = &I2S_CONTROLLER_TYPE,
.owner = &platform_module,
.internal = nullptr
};
} // extern "C"
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