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Patrick Moessler 2024-01-12 22:49:50 +01:00
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# Gitignore settings for ESPHome
# This is an example and may include too much for your use-case.
# You can modify this file to suit your needs.
/.esphome/
/secrets.yaml
__pycache__
*.pyc

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# ESPHome License
Copyright (c) 2019 ESPHome
The ESPHome License is made up of two base licenses: MIT and the GNU GENERAL PUBLIC LICENSE.
The C++/runtime codebase of the ESPHome project (file extensions .c, .cpp, .h, .hpp, .tcc, .ino) are
published under the GPLv3 license. The python codebase and all other parts of this codebase are
published under the MIT license.
Both MIT and GPLv3 licenses are attached to this document.
## MIT License
Copyright (c) 2019 ESPHome
Permission is hereby granted, free of charge, to any person obtaining a copy
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SOFTWARE.
## GPLv3 License
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but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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# ESP32 Clock
This is a YAML config file + driver for a clock based on several LED segment displays driven
by SN74HC595 shift registers.
## Hardware
Connect the shift registers like this, or adapt the pin config as needed:
- Data input (DIO) to ESP GPIO19
- Shift clock input (SCK) to ESP GPIO18
- Latch / register clock input (RCK) to ESP GPIO5
Keep in mind that the ESP32 is a 3.3V device when connecting to a 5V display.
## Setup
Set the board type in the YAML (default should also work on most ESP32 devices)
Adapt the config as needed for the fallback AP and if wanted, api key.
Create a `secrets.yaml` containing this:
```yaml
wifi_ssid: "ssidhere"
wifi_password: "keyhere"
```
Build and upload the config with esphome CLI, or the dashboard.
See [the ESPHome CLI Getting Started Guide](https://esphome.io/guides/getting_started_command_line.html)
how to do that.
## License
The driver in `components/` is directly based on the existing MAX7219 driver in ESPHome and as such
subject to the GPLv3 and MIT licenses, as outlined in the LICENSE document (also copied from ESPHome).
## Open Issues
The actual segment mapping is currently untested, due to missing hardware. It currently is still
the same as in the MAX7219 driver.

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import esphome.codegen as cg
import esphome.config_validation as cv
from esphome.components import display, spi
from esphome.const import CONF_ID, CONF_INTENSITY, CONF_LAMBDA, CONF_NUM_CHIPS
DEPENDENCIES = ["spi"]
spi_74hc595_display_ns = cg.esphome_ns.namespace("spi_74hc595_display")
SPI_74HC595_DISPLAYComponent = spi_74hc595_display_ns.class_(
"SPI_74HC595_DISPLAYComponent", cg.PollingComponent, spi.SPIDevice
)
SPI_74HC595_DISPLAYComponentRef = SPI_74HC595_DISPLAYComponent.operator("ref")
CONF_REVERSE_ENABLE = "reverse_enable"
CONFIG_SCHEMA = (
display.BASIC_DISPLAY_SCHEMA.extend(
{
cv.GenerateID(): cv.declare_id(SPI_74HC595_DISPLAYComponent),
cv.Optional(CONF_NUM_CHIPS, default=1): cv.int_range(min=1, max=255),
# cv.Optional(CONF_INTENSITY, default=15): cv.int_range(min=0, max=15),
cv.Optional(CONF_REVERSE_ENABLE, default=False): cv.boolean,
}
)
.extend(cv.polling_component_schema("1s"))
.extend(spi.spi_device_schema())
)
async def to_code(config):
var = cg.new_Pvariable(config[CONF_ID])
await spi.register_spi_device(var, config)
await display.register_display(var, config)
cg.add(var.set_num_chips(config[CONF_NUM_CHIPS]))
# cg.add(var.set_intensity(config[CONF_INTENSITY]))
cg.add(var.set_reverse(config[CONF_REVERSE_ENABLE]))
if CONF_LAMBDA in config:
lambda_ = await cg.process_lambda(
config[CONF_LAMBDA], [(SPI_74HC595_DISPLAYComponentRef, "it")], return_type=cg.void
)
cg.add(var.set_writer(lambda_))

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#include "spi_74hc595_display.h"
#include "esphome/core/log.h"
#include "esphome/core/helpers.h"
#include "esphome/core/hal.h"
namespace esphome {
namespace spi_74hc595_display {
static const char *const TAG = "spi_74hc595_display";
static const uint8_t SPI_74HC595_DISPLAY_UNKNOWN_CHAR = 0b11111111;
const uint8_t SPI_74HC595_DISPLAY_ASCII_TO_RAW[95] PROGMEM = {
0b00000000, // ' ', ord 0x20
0b10110000, // '!', ord 0x21
0b00100010, // '"', ord 0x22
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '#', ord 0x23
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '$', ord 0x24
0b01001001, // '%', ord 0x25
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '&', ord 0x26
0b00000010, // ''', ord 0x27
0b01001110, // '(', ord 0x28
0b01111000, // ')', ord 0x29
0b01000000, // '*', ord 0x2A
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '+', ord 0x2B
0b00010000, // ',', ord 0x2C
0b00000001, // '-', ord 0x2D
0b10000000, // '.', ord 0x2E
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '/', ord 0x2F
0b01111110, // '0', ord 0x30
0b00110000, // '1', ord 0x31
0b01101101, // '2', ord 0x32
0b01111001, // '3', ord 0x33
0b00110011, // '4', ord 0x34
0b01011011, // '5', ord 0x35
0b01011111, // '6', ord 0x36
0b01110000, // '7', ord 0x37
0b01111111, // '8', ord 0x38
0b01111011, // '9', ord 0x39
0b01001000, // ':', ord 0x3A
0b01011000, // ';', ord 0x3B
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '<', ord 0x3C
0b00001001, // '=', ord 0x3D
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '>', ord 0x3E
0b01100101, // '?', ord 0x3F
0b01101111, // '@', ord 0x40
0b01110111, // 'A', ord 0x41
0b00011111, // 'B', ord 0x42
0b01001110, // 'C', ord 0x43
0b00111101, // 'D', ord 0x44
0b01001111, // 'E', ord 0x45
0b01000111, // 'F', ord 0x46
0b01011110, // 'G', ord 0x47
0b00110111, // 'H', ord 0x48
0b00110000, // 'I', ord 0x49
0b00111100, // 'J', ord 0x4A
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'K', ord 0x4B
0b00001110, // 'L', ord 0x4C
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'M', ord 0x4D
0b00010101, // 'N', ord 0x4E
0b01111110, // 'O', ord 0x4F
0b01100111, // 'P', ord 0x50
0b11111110, // 'Q', ord 0x51
0b00000101, // 'R', ord 0x52
0b01011011, // 'S', ord 0x53
0b00000111, // 'T', ord 0x54
0b00111110, // 'U', ord 0x55
0b00111110, // 'V', ord 0x56
0b00111111, // 'W', ord 0x57
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'X', ord 0x58
0b00100111, // 'Y', ord 0x59
0b01101101, // 'Z', ord 0x5A
0b01001110, // '[', ord 0x5B
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '\', ord 0x5C
0b01111000, // ']', ord 0x5D
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // '^', ord 0x5E
0b00001000, // '_', ord 0x5F
0b00100000, // '`', ord 0x60
0b01110111, // 'a', ord 0x61
0b00011111, // 'b', ord 0x62
0b00001101, // 'c', ord 0x63
0b00111101, // 'd', ord 0x64
0b01001111, // 'e', ord 0x65
0b01000111, // 'f', ord 0x66
0b01011110, // 'g', ord 0x67
0b00010111, // 'h', ord 0x68
0b00010000, // 'i', ord 0x69
0b00111100, // 'j', ord 0x6A
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'k', ord 0x6B
0b00001110, // 'l', ord 0x6C
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'm', ord 0x6D
0b00010101, // 'n', ord 0x6E
0b00011101, // 'o', ord 0x6F
0b01100111, // 'p', ord 0x70
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'q', ord 0x71
0b00000101, // 'r', ord 0x72
0b01011011, // 's', ord 0x73
0b00000111, // 't', ord 0x74
0b00011100, // 'u', ord 0x75
0b00011100, // 'v', ord 0x76
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'w', ord 0x77
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'x', ord 0x78
0b00100111, // 'y', ord 0x79
SPI_74HC595_DISPLAY_UNKNOWN_CHAR, // 'z', ord 0x7A
0b00110001, // '{', ord 0x7B
0b00000110, // '|', ord 0x7C
0b00000111, // '}', ord 0x7D
0b01100011, // '~', ord 0x7E (degree symbol)
};
float SPI_74HC595_DISPLAYComponent::get_setup_priority() const { return setup_priority::PROCESSOR; }
void SPI_74HC595_DISPLAYComponent::setup() {
ESP_LOGCONFIG(TAG, "Setting up SPI_74HC595_DISPLAY...");
this->spi_setup();
this->buffer_ = new uint8_t[this->num_chips_ * 8]; // NOLINT
for (uint8_t i = 0; i < this->num_chips_ * 8; i++)
this->buffer_[i] = 0;
}
void SPI_74HC595_DISPLAYComponent::dump_config() {
ESP_LOGCONFIG(TAG, "SPI_74HC595_DISPLAY:");
ESP_LOGCONFIG(TAG, " Number of Chips: %u", this->num_chips_);
LOG_PIN(" CS Pin: ", this->cs_);
LOG_UPDATE_INTERVAL(this);
}
void SPI_74HC595_DISPLAYComponent::display() {
for (uint8_t i = 0; i < 8; i++) {
this->enable();
for (uint8_t j = 0; j < this->num_chips_; j++) {
if (reverse_) {
this->send_byte_(1U << i, buffer_[(num_chips_ - j - 1) * 8 + i]);
} else {
this->send_byte_(1U << i, buffer_[j * 8 + i]);
}
}
this->disable();
}
}
void SPI_74HC595_DISPLAYComponent::send_byte_(uint8_t a_register, uint8_t data) {
this->write_byte(a_register);
this->write_byte(data);
}
void SPI_74HC595_DISPLAYComponent::update() {
for (uint8_t i = 0; i < this->num_chips_ * 8; i++)
this->buffer_[i] = 0;
if (this->writer_.has_value())
(*this->writer_)(*this);
this->display();
}
uint8_t SPI_74HC595_DISPLAYComponent::print(uint8_t start_pos, const char *str) {
uint8_t pos = start_pos;
for (; *str != '\0'; str++) {
uint8_t data = SPI_74HC595_DISPLAY_UNKNOWN_CHAR;
if (*str >= ' ' && *str <= '~')
data = progmem_read_byte(&SPI_74HC595_DISPLAY_ASCII_TO_RAW[*str - ' ']);
if (data == SPI_74HC595_DISPLAY_UNKNOWN_CHAR) {
ESP_LOGW(TAG, "Encountered character '%c' with no SPI_74HC595_DISPLAY representation while translating string!", *str);
}
if (*str == '.') {
if (pos != start_pos)
pos--;
this->buffer_[pos] |= 0b10000000;
} else {
if (pos >= this->num_chips_ * 8) {
ESP_LOGE(TAG, "SPI_74HC595_DISPLAY String is too long for the display!");
break;
}
this->buffer_[pos] = data;
}
pos++;
}
return pos - start_pos;
}
uint8_t SPI_74HC595_DISPLAYComponent::print(const char *str) { return this->print(0, str); }
uint8_t SPI_74HC595_DISPLAYComponent::printf(uint8_t pos, const char *format, ...) {
va_list arg;
va_start(arg, format);
char buffer[64];
int ret = vsnprintf(buffer, sizeof(buffer), format, arg);
va_end(arg);
if (ret > 0)
return this->print(pos, buffer);
return 0;
}
uint8_t SPI_74HC595_DISPLAYComponent::printf(const char *format, ...) {
va_list arg;
va_start(arg, format);
char buffer[64];
int ret = vsnprintf(buffer, sizeof(buffer), format, arg);
va_end(arg);
if (ret > 0)
return this->print(buffer);
return 0;
}
void SPI_74HC595_DISPLAYComponent::set_writer(spi_74hc595_display_writer_t &&writer) { this->writer_ = writer; }
void SPI_74HC595_DISPLAYComponent::set_num_chips(uint8_t num_chips) { this->num_chips_ = num_chips; }
uint8_t SPI_74HC595_DISPLAYComponent::strftime(uint8_t pos, const char *format, ESPTime time) {
char buffer[64];
size_t ret = time.strftime(buffer, sizeof(buffer), format);
if (ret > 0)
return this->print(pos, buffer);
return 0;
}
uint8_t SPI_74HC595_DISPLAYComponent::strftime(const char *format, ESPTime time) { return this->strftime(0, format, time); }
} // namespace spi_74hc595_display
} // namespace esphome

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#pragma once
#include "esphome/core/component.h"
#include "esphome/core/time.h"
#include "esphome/components/spi/spi.h"
namespace esphome {
namespace spi_74hc595_display {
class SPI_74HC595_DISPLAYComponent;
using spi_74hc595_display_writer_t = std::function<void(SPI_74HC595_DISPLAYComponent &)>;
class SPI_74HC595_DISPLAYComponent : public PollingComponent,
public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW,
spi::CLOCK_PHASE_LEADING, spi::DATA_RATE_1MHZ> {
public:
void set_writer(spi_74hc595_display_writer_t &&writer);
void setup() override;
void dump_config() override;
void update() override;
float get_setup_priority() const override;
void display();
void set_num_chips(uint8_t num_chips);
void set_reverse(bool reverse) { this->reverse_ = reverse; };
/// Evaluate the printf-format and print the result at the given position.
uint8_t printf(uint8_t pos, const char *format, ...) __attribute__((format(printf, 3, 4)));
/// Evaluate the printf-format and print the result at position 0.
uint8_t printf(const char *format, ...) __attribute__((format(printf, 2, 3)));
/// Print `str` at the given position.
uint8_t print(uint8_t pos, const char *str);
/// Print `str` at position 0.
uint8_t print(const char *str);
/// Evaluate the strftime-format and print the result at the given position.
uint8_t strftime(uint8_t pos, const char *format, ESPTime time) __attribute__((format(strftime, 3, 0)));
/// Evaluate the strftime-format and print the result at position 0.
uint8_t strftime(const char *format, ESPTime time) __attribute__((format(strftime, 2, 0)));
protected:
void send_byte_(uint8_t a_register, uint8_t data);
void send_to_all_(uint8_t a_register, uint8_t data);
uint8_t num_chips_{1};
uint8_t *buffer_;
bool reverse_{false};
optional<spi_74hc595_display_writer_t> writer_{};
};
} // namespace spi_74hc595_display
} // namespace esphome

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esphome:
name: esphome-clock
friendly_name: ESPHome Clock
esp32:
board: esp32dev
framework:
type: arduino
# Enable logging
logger:
logs:
sensor: INFO
# Enable Home Assistant API
api:
encryption:
key: ""
ota:
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "ESP32Clock"
password: "fallBackPass"
captive_portal:
external_components:
- source:
type: local
path: components
time:
- platform: sntp
id: sntp_time
timezone: Europe/Berlin
on_time:
- seconds: 10
then:
- logger.log:
level: INFO
format: "%2d%2d%2d%2d"
args: ['int(id(runtime).state/3600)%24', 'int(id(runtime).state/60)%60', 'int(id(runtime).state)%60', 'int(id(runtime).state-int(id(runtime).state)*25)']
spi:
clk_pin: GPIO18
mosi_pin: GPIO19
sensor:
- platform: uptime
id: runtime
update_interval: 100ms
display:
- platform: spi_74hc595_display
cs_pin: GPIO5
data_rate: 5MHz
num_chips: 3
update_interval: 40ms
lambda: |-
static int clock_frames=0;
static int old_clock=0;
if(id(sntp_time).now().second!=old_clock){
clock_frames=0;
old_clock=id(sntp_time).now().second;
} else {
clock_frames++;
}
it.strftime(0, "%H%M%s", id(sntp_time).now());
it.printf(7, "%2d", clock_frames);
/*it.strftime(8, "%H%M%s", id(sntp_time).now());*/
/*it.printf(11, "%1d", 0)*/
it.printf(12, "%2d%2d%2d%2d", int(id(runtime).state/3600)%24, int(id(runtime).state/60)%60, int(id(runtime).state)%60, int(id(runtime).state-int(id(runtime).state)*25) );