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support spi for sn74hc595 (#5491)

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Co-authored-by: Jimmy Hedman <jimmy.hedman@gmail.com>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Angel Nunez Mencias 2023-11-07 10:15:13 +01:00 committed by GitHub
parent 78e3ce7718
commit ccffbfd3ae
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 149 additions and 48 deletions
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65
esphome/components/sn74hc595/__init__.py
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@ -1,8 +1,10 @@
import esphome.codegen as cg
import esphome.config_validation as cv
from esphome import pins
from esphome.components import spi
from esphome.const import (
CONF_ID,
CONF_SPI_ID,
CONF_MODE,
CONF_NUMBER,
CONF_INVERTED,
@ -10,13 +12,20 @@ from esphome.const import (
CONF_CLOCK_PIN,
CONF_OUTPUT,
)
from esphome.core import EsphomeError
DEPENDENCIES = []
MULTI_CONF = True
sn74hc595_ns = cg.esphome_ns.namespace("sn74hc595")
SN74HC595Component = sn74hc595_ns.class_("SN74HC595Component", cg.Component)
SN74HC595GPIOComponent = sn74hc595_ns.class_(
"SN74HC595GPIOComponent", SN74HC595Component
)
SN74HC595SPIComponent = sn74hc595_ns.class_(
"SN74HC595SPIComponent", SN74HC595Component, spi.SPIDevice
)
SN74HC595GPIOPin = sn74hc595_ns.class_(
"SN74HC595GPIOPin", cg.GPIOPin, cg.Parented.template(SN74HC595Component)
)
@ -25,25 +34,51 @@ CONF_SN74HC595 = "sn74hc595"
CONF_LATCH_PIN = "latch_pin"
CONF_OE_PIN = "oe_pin"
CONF_SR_COUNT = "sr_count"
CONFIG_SCHEMA = cv.Schema(
{
cv.Required(CONF_ID): cv.declare_id(SN74HC595Component),
cv.Required(CONF_DATA_PIN): pins.gpio_output_pin_schema,
cv.Required(CONF_CLOCK_PIN): pins.gpio_output_pin_schema,
cv.Required(CONF_LATCH_PIN): pins.gpio_output_pin_schema,
cv.Optional(CONF_OE_PIN): pins.gpio_output_pin_schema,
cv.Optional(CONF_SR_COUNT, default=1): cv.int_range(min=1, max=256),
}
).extend(cv.COMPONENT_SCHEMA)
CONFIG_SCHEMA = cv.Any(
cv.Schema(
{
cv.Required(CONF_ID): cv.declare_id(SN74HC595GPIOComponent),
cv.Required(CONF_DATA_PIN): pins.gpio_output_pin_schema,
cv.Required(CONF_CLOCK_PIN): pins.gpio_output_pin_schema,
cv.Required(CONF_LATCH_PIN): pins.gpio_output_pin_schema,
cv.Optional(CONF_OE_PIN): pins.gpio_output_pin_schema,
cv.Optional(CONF_SR_COUNT, default=1): cv.int_range(min=1, max=256),
}
).extend(cv.COMPONENT_SCHEMA),
cv.Schema(
{
cv.Required(CONF_ID): cv.declare_id(SN74HC595SPIComponent),
cv.Required(CONF_LATCH_PIN): pins.gpio_output_pin_schema,
cv.Optional(CONF_OE_PIN): pins.gpio_output_pin_schema,
cv.Optional(CONF_SR_COUNT, default=1): cv.int_range(min=1, max=256),
}
)
.extend(cv.COMPONENT_SCHEMA)
.extend(spi.spi_device_schema(cs_pin_required=False))
.extend(
{
cv.Required(CONF_SPI_ID): cv.use_id(spi.SPIComponent),
}
),
msg='Either "data_pin" and "clock_pin" must be set or "spi_id" must be set.',
)
async def to_code(config):
var = cg.new_Pvariable(config[CONF_ID])
await cg.register_component(var, config)
data_pin = await cg.gpio_pin_expression(config[CONF_DATA_PIN])
cg.add(var.set_data_pin(data_pin))
clock_pin = await cg.gpio_pin_expression(config[CONF_CLOCK_PIN])
cg.add(var.set_clock_pin(clock_pin))
if CONF_DATA_PIN in config:
data_pin = await cg.gpio_pin_expression(config[CONF_DATA_PIN])
cg.add(var.set_data_pin(data_pin))
clock_pin = await cg.gpio_pin_expression(config[CONF_CLOCK_PIN])
cg.add(var.set_clock_pin(clock_pin))
elif CONF_SPI_ID in config:
await spi.register_spi_device(var, config)
else:
raise EsphomeError("Not supported")
latch_pin = await cg.gpio_pin_expression(config[CONF_LATCH_PIN])
cg.add(var.set_latch_pin(latch_pin))
if CONF_OE_PIN in config:

70
esphome/components/sn74hc595/sn74hc595.cpp
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@ -6,26 +6,39 @@ namespace sn74hc595 {
static const char *const TAG = "sn74hc595";
void SN74HC595Component::setup() {
void SN74HC595Component::pre_setup_() {
ESP_LOGCONFIG(TAG, "Setting up SN74HC595...");
if (this->have_oe_pin_) { // disable output
this->oe_pin_->setup();
this->oe_pin_->digital_write(true);
}
// initialize output pins
this->clock_pin_->setup();
this->data_pin_->setup();
}
void SN74HC595Component::post_setup_() {
this->latch_pin_->setup();
this->clock_pin_->digital_write(false);
this->data_pin_->digital_write(false);
this->latch_pin_->digital_write(false);
// send state to shift register
this->write_gpio_();
this->write_gpio();
}
void SN74HC595GPIOComponent::setup() {
this->pre_setup_();
this->clock_pin_->setup();
this->data_pin_->setup();
this->clock_pin_->digital_write(false);
this->data_pin_->digital_write(false);
this->post_setup_();
}
#ifdef USE_SPI
void SN74HC595SPIComponent::setup() {
this->pre_setup_();
this->spi_setup();
this->post_setup_();
}
#endif
void SN74HC595Component::dump_config() { ESP_LOGCONFIG(TAG, "SN74HC595:"); }
void SN74HC595Component::digital_write_(uint16_t pin, bool value) {
@ -34,17 +47,38 @@ void SN74HC595Component::digital_write_(uint16_t pin, bool value) {
(this->sr_count_ * 8) - 1);
return;
}
this->output_bits_[pin] = value;
this->write_gpio_();
if (value) {
this->output_bytes_[pin / 8] |= (1 << (pin % 8));
} else {
this->output_bytes_[pin / 8] &= ~(1 << (pin % 8));
}
this->write_gpio();
}
void SN74HC595Component::write_gpio_() {
for (auto bit = this->output_bits_.rbegin(); bit != this->output_bits_.rend(); bit++) {
this->data_pin_->digital_write(*bit);
this->clock_pin_->digital_write(true);
this->clock_pin_->digital_write(false);
void SN74HC595GPIOComponent::write_gpio() {
for (auto byte = this->output_bytes_.rbegin(); byte != this->output_bytes_.rend(); byte++) {
for (int8_t i = 7; i >= 0; i--) {
bool bit = (*byte >> i) & 1;
this->data_pin_->digital_write(bit);
this->clock_pin_->digital_write(true);
this->clock_pin_->digital_write(false);
}
}
SN74HC595Component::write_gpio();
}
#ifdef USE_SPI
void SN74HC595SPIComponent::write_gpio() {
for (auto byte = this->output_bytes_.rbegin(); byte != this->output_bytes_.rend(); byte++) {
this->enable();
this->transfer_byte(*byte);
this->disable();
}
SN74HC595Component::write_gpio();
}
#endif
void SN74HC595Component::write_gpio() {
// pulse latch to activate new values
this->latch_pin_->digital_write(true);
this->latch_pin_->digital_write(false);
@ -60,11 +94,7 @@ float SN74HC595Component::get_setup_priority() const { return setup_priority::IO
void SN74HC595GPIOPin::digital_write(bool value) {
this->parent_->digital_write_(this->pin_, value != this->inverted_);
}
std::string SN74HC595GPIOPin::dump_summary() const {
char buffer[32];
snprintf(buffer, sizeof(buffer), "%u via SN74HC595", pin_);
return buffer;
}
std::string SN74HC595GPIOPin::dump_summary() const { return str_snprintf("%u via SN74HC595", 18, pin_); }
} // namespace sn74hc595
} // namespace esphome

54
esphome/components/sn74hc595/sn74hc595.h
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@ -1,9 +1,14 @@
#pragma once
#include "esphome/core/component.h"
#include "esphome/core/defines.h"
#include "esphome/core/hal.h"
#include "esphome/core/helpers.h"
#ifdef USE_SPI
#include "esphome/components/spi/spi.h"
#endif
#include <vector>
namespace esphome {
@ -13,34 +18,33 @@ class SN74HC595Component : public Component {
public:
SN74HC595Component() = default;
void setup() override;
void setup() override = 0;
float get_setup_priority() const override;
void dump_config() override;
void set_data_pin(GPIOPin *pin) { data_pin_ = pin; }
void set_clock_pin(GPIOPin *pin) { clock_pin_ = pin; }
void set_latch_pin(GPIOPin *pin) { latch_pin_ = pin; }
void set_latch_pin(GPIOPin *pin) { this->latch_pin_ = pin; }
void set_oe_pin(GPIOPin *pin) {
oe_pin_ = pin;
have_oe_pin_ = true;
this->oe_pin_ = pin;
this->have_oe_pin_ = true;
}
void set_sr_count(uint8_t count) {
sr_count_ = count;
this->output_bits_.resize(count * 8);
this->sr_count_ = count;
this->output_bytes_.resize(count);
}
protected:
friend class SN74HC595GPIOPin;
void digital_write_(uint16_t pin, bool value);
void write_gpio_();
virtual void write_gpio();
void pre_setup_();
void post_setup_();
GPIOPin *data_pin_;
GPIOPin *clock_pin_;
GPIOPin *latch_pin_;
GPIOPin *oe_pin_;
uint8_t sr_count_;
bool have_oe_pin_{false};
std::vector<bool> output_bits_;
std::vector<uint8_t> output_bytes_;
};
/// Helper class to expose a SC74HC595 pin as an internal output GPIO pin.
@ -60,5 +64,31 @@ class SN74HC595GPIOPin : public GPIOPin, public Parented<SN74HC595Component> {
bool inverted_;
};
class SN74HC595GPIOComponent : public SN74HC595Component {
public:
void setup() override;
void set_data_pin(GPIOPin *pin) { data_pin_ = pin; }
void set_clock_pin(GPIOPin *pin) { clock_pin_ = pin; }
protected:
void write_gpio() override;
GPIOPin *data_pin_;
GPIOPin *clock_pin_;
};
#ifdef USE_SPI
class SN74HC595SPIComponent : public SN74HC595Component,
public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW,
spi::CLOCK_PHASE_LEADING, spi::DATA_RATE_4MHZ> {
public:
void setup() override;
protected:
void write_gpio() override;
};
#endif
} // namespace sn74hc595
} // namespace esphome

8
tests/test1.yaml
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@ -189,6 +189,7 @@ i2c:
id: i2c_bus
spi:
id: spi_bus
clk_pin: GPIO21
mosi_pin: GPIO22
miso_pin: GPIO23
@ -2737,7 +2738,7 @@ switch:
- platform: gpio
name: "SN74HC595 Pin #0"
pin:
sn74hc595: sn74hc595_hub
sn74hc595: sn74hc595_hub_2
# Use pin number 0
number: 0
inverted: false
@ -3385,6 +3386,11 @@ sn74hc595:
latch_pin: GPIO22
oe_pin: GPIO32
sr_count: 2
- id: sn74hc595_hub_2
latch_pin: GPIO22
oe_pin: GPIO32
sr_count: 2
spi_id: spi_bus
rtttl:
output: gpio_19