UART component support added for host platform (#6912)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Co-authored-by: Pavlo Dudnytskyi <pdudnytskyi@astrata.eu>
This commit is contained in:
Pavlo Dudnytskyi 2024-07-11 03:30:55 +02:00 committed by GitHub
parent 2873c6bbaf
commit aa8c963c50
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
4 changed files with 410 additions and 2 deletions

View file

@ -1,5 +1,5 @@
from typing import Optional
import re
import esphome.codegen as cg
import esphome.config_validation as cv
import esphome.final_validate as fv
@ -11,6 +11,7 @@ from esphome.const import (
CONF_NUMBER,
CONF_RX_PIN,
CONF_TX_PIN,
CONF_PORT,
CONF_UART_ID,
CONF_DATA,
CONF_RX_BUFFER_SIZE,
@ -27,6 +28,7 @@ from esphome.const import (
CONF_DUMMY_RECEIVER,
CONF_DUMMY_RECEIVER_ID,
CONF_LAMBDA,
PLATFORM_HOST,
)
from esphome.core import CORE
@ -45,6 +47,7 @@ RP2040UartComponent = uart_ns.class_("RP2040UartComponent", UARTComponent, cg.Co
LibreTinyUARTComponent = uart_ns.class_(
"LibreTinyUARTComponent", UARTComponent, cg.Component
)
HostUartComponent = uart_ns.class_("HostUartComponent", UARTComponent, cg.Component)
NATIVE_UART_CLASSES = (
str(IDFUARTComponent),
@ -54,6 +57,39 @@ NATIVE_UART_CLASSES = (
str(LibreTinyUARTComponent),
)
HOST_BAUD_RATES = [
50,
75,
110,
134,
150,
200,
300,
600,
1200,
1800,
2400,
4800,
9600,
19200,
38400,
57600,
115200,
230400,
460800,
500000,
576000,
921600,
1000000,
1152000,
1500000,
2000000,
2500000,
3000000,
3500000,
4000000,
]
UARTDevice = uart_ns.class_("UARTDevice")
UARTWriteAction = uart_ns.class_("UARTWriteAction", automation.Action)
UARTDebugger = uart_ns.class_("UARTDebugger", cg.Component, automation.Action)
@ -95,6 +131,20 @@ def validate_invert_esp32(config):
return config
def validate_host_config(config):
if CORE.is_host:
if CONF_TX_PIN in config or CONF_RX_PIN in config:
raise cv.Invalid(
"TX and RX pins are not supported for UART on host platform."
)
if config[CONF_BAUD_RATE] not in HOST_BAUD_RATES:
raise cv.Invalid(
f"Host platform doesn't support baud rate {config[CONF_BAUD_RATE]}",
path=[CONF_BAUD_RATE],
)
return config
def _uart_declare_type(value):
if CORE.is_esp8266:
return cv.declare_id(ESP8266UartComponent)(value)
@ -107,6 +157,8 @@ def _uart_declare_type(value):
return cv.declare_id(RP2040UartComponent)(value)
if CORE.is_libretiny:
return cv.declare_id(LibreTinyUARTComponent)(value)
if CORE.is_host:
return cv.declare_id(HostUartComponent)(value)
raise NotImplementedError
@ -149,6 +201,12 @@ def maybe_empty_debug(value):
return DEBUG_SCHEMA(value)
def validate_port(value):
if not re.match(r"^/(?:[^/]+/)[^/]+$", value):
raise cv.Invalid("Port must be a valid device path")
return value
DEBUG_SCHEMA = cv.Schema(
{
cv.GenerateID(CONF_TRIGGER_ID): cv.declare_id(UARTDebugger),
@ -181,6 +239,7 @@ CONFIG_SCHEMA = cv.All(
cv.Required(CONF_BAUD_RATE): cv.int_range(min=1),
cv.Optional(CONF_TX_PIN): pins.internal_gpio_output_pin_schema,
cv.Optional(CONF_RX_PIN): validate_rx_pin,
cv.Optional(CONF_PORT): cv.All(validate_port, cv.only_on(PLATFORM_HOST)),
cv.Optional(CONF_RX_BUFFER_SIZE, default=256): cv.validate_bytes,
cv.Optional(CONF_STOP_BITS, default=1): cv.one_of(1, 2, int=True),
cv.Optional(CONF_DATA_BITS, default=8): cv.int_range(min=5, max=8),
@ -193,8 +252,9 @@ CONFIG_SCHEMA = cv.All(
cv.Optional(CONF_DEBUG): maybe_empty_debug,
}
).extend(cv.COMPONENT_SCHEMA),
cv.has_at_least_one_key(CONF_TX_PIN, CONF_RX_PIN),
cv.has_at_least_one_key(CONF_TX_PIN, CONF_RX_PIN, CONF_PORT),
validate_invert_esp32,
validate_host_config,
)
@ -236,6 +296,8 @@ async def to_code(config):
if CONF_RX_PIN in config:
rx_pin = await cg.gpio_pin_expression(config[CONF_RX_PIN])
cg.add(var.set_rx_pin(rx_pin))
if CONF_PORT in config:
cg.add(var.set_name(config[CONF_PORT]))
cg.add(var.set_rx_buffer_size(config[CONF_RX_BUFFER_SIZE]))
cg.add(var.set_stop_bits(config[CONF_STOP_BITS]))
cg.add(var.set_data_bits(config[CONF_DATA_BITS]))

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@ -0,0 +1,295 @@
#ifdef USE_HOST
#include "uart_component_host.h"
#include "esphome/core/application.h"
#include "esphome/core/defines.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
#ifndef __linux__
#error This HostUartComponent implementation is only for Linux
#endif
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
#include <sys/ioctl.h>
#ifdef USE_LOGGER
#include "esphome/components/logger/logger.h"
#endif
namespace {
speed_t get_baud(int baud) {
switch (baud) {
case 50:
return B50;
case 75:
return B75;
case 110:
return B110;
case 134:
return B134;
case 150:
return B150;
case 200:
return B200;
case 300:
return B300;
case 600:
return B600;
case 1200:
return B1200;
case 1800:
return B1800;
case 2400:
return B2400;
case 4800:
return B4800;
case 9600:
return B9600;
case 19200:
return B19200;
case 38400:
return B38400;
case 57600:
return B57600;
case 115200:
return B115200;
case 230400:
return B230400;
case 460800:
return B460800;
case 500000:
return B500000;
case 576000:
return B576000;
case 921600:
return B921600;
case 1000000:
return B1000000;
case 1152000:
return B1152000;
case 1500000:
return B1500000;
case 2000000:
return B2000000;
case 2500000:
return B2500000;
case 3000000:
return B3000000;
case 3500000:
return B3500000;
case 4000000:
return B4000000;
default:
return B0;
}
}
} // namespace
namespace esphome {
namespace uart {
static const char *const TAG = "uart.host";
HostUartComponent::~HostUartComponent() {
if (this->file_descriptor_ != -1) {
close(this->file_descriptor_);
this->file_descriptor_ = -1;
}
}
void HostUartComponent::setup() {
ESP_LOGCONFIG(TAG, "Opening UART port...");
speed_t baud = get_baud(this->baud_rate_);
if (baud == B0) {
ESP_LOGE(TAG, "Unsupported baud rate: %d", this->baud_rate_);
this->mark_failed();
return;
}
this->file_descriptor_ = ::open(this->port_name_.c_str(), O_RDWR | O_NOCTTY | O_NDELAY);
if (this->file_descriptor_ == -1) {
this->update_error_(strerror(errno));
this->mark_failed();
return;
}
fcntl(this->file_descriptor_, F_SETFL, 0);
struct termios options;
tcgetattr(this->file_descriptor_, &options);
options.c_cflag &= ~CRTSCTS;
options.c_cflag |= CREAD | CLOCAL;
options.c_lflag &= ~ICANON;
options.c_lflag &= ~ECHO;
options.c_lflag &= ~ECHOE;
options.c_lflag &= ~ECHONL;
options.c_lflag &= ~ISIG;
options.c_iflag &= ~(IXON | IXOFF | IXANY);
options.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL);
options.c_oflag &= ~OPOST;
options.c_oflag &= ~ONLCR;
// Set data bits
options.c_cflag &= ~CSIZE; // Mask the character size bits
switch (this->data_bits_) {
case 5:
options.c_cflag |= CS5;
break;
case 6:
options.c_cflag |= CS6;
break;
case 7:
options.c_cflag |= CS7;
break;
case 8:
default:
options.c_cflag |= CS8;
break;
}
// Set parity
switch (this->parity_) {
case UART_CONFIG_PARITY_NONE:
options.c_cflag &= ~PARENB;
break;
case UART_CONFIG_PARITY_EVEN:
options.c_cflag |= PARENB;
options.c_cflag &= ~PARODD;
break;
case UART_CONFIG_PARITY_ODD:
options.c_cflag |= PARENB;
options.c_cflag |= PARODD;
break;
};
// Set stop bits
if (this->stop_bits_ == 2) {
options.c_cflag |= CSTOPB;
} else {
options.c_cflag &= ~CSTOPB;
}
cfsetispeed(&options, baud);
cfsetospeed(&options, baud);
tcsetattr(this->file_descriptor_, TCSANOW, &options);
}
void HostUartComponent::dump_config() {
ESP_LOGCONFIG(TAG, "UART:");
ESP_LOGCONFIG(TAG, " Port: %s", this->port_name_.c_str());
if (this->file_descriptor_ == -1) {
ESP_LOGCONFIG(TAG, " Port status: Not opened");
if (!this->first_error_.empty()) {
ESP_LOGCONFIG(TAG, " Error: %s", this->first_error_.c_str());
}
return;
}
ESP_LOGCONFIG(TAG, " Port status: opened");
ESP_LOGCONFIG(TAG, " Baud Rate: %d", this->baud_rate_);
ESP_LOGCONFIG(TAG, " Data Bits: %d", this->data_bits_);
ESP_LOGCONFIG(TAG, " Parity: %s",
this->parity_ == UART_CONFIG_PARITY_NONE ? "None"
: this->parity_ == UART_CONFIG_PARITY_EVEN ? "Even"
: "Odd");
ESP_LOGCONFIG(TAG, " Stop Bits: %d", this->stop_bits_);
this->check_logger_conflict();
}
void HostUartComponent::write_array(const uint8_t *data, size_t len) {
if (this->file_descriptor_ == -1) {
return;
}
size_t written = ::write(this->file_descriptor_, data, len);
if (written != len) {
this->update_error_(strerror(errno));
return;
}
#ifdef USE_UART_DEBUGGER
for (size_t i = 0; i < len; i++) {
this->debug_callback_.call(UART_DIRECTION_TX, data[i]);
}
#endif
return;
}
bool HostUartComponent::peek_byte(uint8_t *data) {
if (this->file_descriptor_ == -1) {
return false;
}
if (!this->has_peek_) {
if (!this->check_read_timeout_()) {
return false;
}
if (::read(this->file_descriptor_, &this->peek_byte_, 1) != 1) {
this->update_error_(strerror(errno));
return false;
}
this->has_peek_ = true;
}
*data = this->peek_byte_;
return true;
}
bool HostUartComponent::read_array(uint8_t *data, size_t len) {
if ((this->file_descriptor_ == -1) || (len == 0)) {
return false;
}
if (!this->check_read_timeout_(len))
return false;
uint8_t *data_ptr = data;
size_t length_to_read = len;
if (this->has_peek_) {
length_to_read--;
*data_ptr = this->peek_byte_;
data_ptr++;
this->has_peek_ = false;
}
if (length_to_read > 0) {
int sz = ::read(this->file_descriptor_, data_ptr, length_to_read);
if (sz == -1) {
this->update_error_(strerror(errno));
return false;
}
}
#ifdef USE_UART_DEBUGGER
for (size_t i = 0; i < len; i++) {
this->debug_callback_.call(UART_DIRECTION_RX, data[i]);
}
#endif
return true;
}
int HostUartComponent::available() {
if (this->file_descriptor_ == -1) {
return 0;
}
int available;
int res = ioctl(this->file_descriptor_, FIONREAD, &available);
if (res == -1) {
this->update_error_(strerror(errno));
return 0;
}
if (this->has_peek_)
available++;
return available;
};
void HostUartComponent::flush() {
if (this->file_descriptor_ == -1) {
return;
}
tcflush(this->file_descriptor_, TCIOFLUSH);
ESP_LOGV(TAG, " Flushing...");
}
void HostUartComponent::update_error_(const std::string &error) {
if (this->first_error_.empty()) {
this->first_error_ = error;
}
ESP_LOGE(TAG, "Port error: %s", error.c_str());
}
} // namespace uart
} // namespace esphome
#endif // USE_HOST

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@ -0,0 +1,38 @@
#pragma once
#ifdef USE_HOST
#include "esphome/core/component.h"
#include "esphome/core/log.h"
#include "uart_component.h"
namespace esphome {
namespace uart {
class HostUartComponent : public UARTComponent, public Component {
public:
virtual ~HostUartComponent();
void setup() override;
void dump_config() override;
float get_setup_priority() const override { return setup_priority::BUS; }
void write_array(const uint8_t *data, size_t len) override;
bool peek_byte(uint8_t *data) override;
bool read_array(uint8_t *data, size_t len) override;
int available() override;
void flush() override;
void set_name(std::string port_name) { port_name_ = port_name; };
protected:
void update_error_(const std::string &error);
void check_logger_conflict() override {}
std::string port_name_;
std::string first_error_{""};
int file_descriptor_ = -1;
bool has_peek_{false};
uint8_t peek_byte_;
};
} // namespace uart
} // namespace esphome
#endif // USE_HOST

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@ -0,0 +1,13 @@
esphome:
on_boot:
then:
- uart.write: 'Hello World'
- uart.write: [0x00, 0x20, 0x42]
uart:
- id: uart_uart
port: "/dev/ttyS0"
baud_rate: 9600
data_bits: 8
parity: EVEN
stop_bits: 2