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1
.gitignore vendored Normal file
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.pio

6
CMakeLists.txt Normal file
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# The following lines of boilerplate have to be in your project's CMakeLists
# in this exact order for cmake to work correctly
cmake_minimum_required(VERSION 3.5)
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(uart_echo)

2
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(kicad_pcb (version 20240108) (generator "pcbnew") (generator_version "8.0")
)

83
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{
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"pads": 1.0,
"tracks": 1.0,
"vias": 1.0,
"zones": 0.6
},
"selection_filter": {
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"footprints": true,
"graphics": true,
"keepouts": true,
"lockedItems": false,
"otherItems": true,
"pads": true,
"text": true,
"tracks": true,
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"visible_layers": "fffffff_ffffffff",
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"meta": {
"filename": "hw.kicad_prl",
"version": 3
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"project": {
"files": []
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}

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hw/hw.kicad_pro Normal file
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{
"board": {
"3dviewports": [],
"design_settings": {
"defaults": {},
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"drc_exclusions": [],
"rules": {},
"track_widths": [],
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},
"ipc2581": {
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"distpn": "",
"internal_id": "",
"mfg": "",
"mpn": ""
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"equivalence_files": []
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"different_unit_footprint": "error",
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"duplicate_reference": "error",
"duplicate_sheet_names": "error",
"endpoint_off_grid": "warning",
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"global_label_dangling": "warning",
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"missing_input_pin": "warning",
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"missing_unit": "warning",
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"similar_labels": "warning",
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"unit_value_mismatch": "error",
"unresolved_variable": "error",
"wire_dangling": "error"
}
},
"libraries": {
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"pinned_symbol_libs": []
},
"meta": {
"filename": "hw.kicad_pro",
"version": 1
},
"net_settings": {
"classes": [
{
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"clearance": 0.2,
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"diff_pair_width": 0.2,
"line_style": 0,
"microvia_diameter": 0.3,
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"name": "Default",
"pcb_color": "rgba(0, 0, 0, 0.000)",
"schematic_color": "rgba(0, 0, 0, 0.000)",
"track_width": 0.2,
"via_diameter": 0.6,
"via_drill": 0.3,
"wire_width": 6
}
],
"meta": {
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"net_colors": null,
"netclass_assignments": null,
"netclass_patterns": []
},
"pcbnew": {
"last_paths": {
"gencad": "",
"idf": "",
"netlist": "",
"plot": "",
"pos_files": "",
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"step": "",
"svg": "",
"vrml": ""
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"schematic": {
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"name": "${QUANTITY}",
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"label": "DNP",
"name": "${DNP}",
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],
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"Root"
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}

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hw/hw.kicad_sch Normal file
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22
platformio.ini Normal file
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; PlatformIO Project Configuration File
;
; Build options: build flags, source filter, extra scripting
; Upload options: custom port, speed and extra flags
; Library options: dependencies, extra library storages
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html
[env]
platform = espressif32
framework = espidf
monitor_speed = 115200
monitor_filters =
direct
esp32_exception_decoder
[env:esp32dev]
board = esp32dev
[env:dfrobot_beetle_esp32c3]
board = dfrobot_beetle_esp32c3

2
src/CMakeLists.txt Normal file
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idf_component_register(SRCS "main.c"
INCLUDE_DIRS ".")

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src/Kconfig.projbuild Normal file
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menu "Echo Example Configuration"
orsource "$IDF_PATH/examples/common_components/env_caps/$IDF_TARGET/Kconfig.env_caps"
config EXAMPLE_UART_PORT_NUM
int "UART port number"
range 0 2 if IDF_TARGET_ESP32 || IDF_TARGET_ESP32S3
default 2 if IDF_TARGET_ESP32 || IDF_TARGET_ESP32S3
range 0 1 if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32C2 || IDF_TARGET_ESP32H2
default 1 if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32C2 || IDF_TARGET_ESP32H2
help
UART communication port number for the example.
See UART documentation for available port numbers.
config EXAMPLE_UART_BAUD_RATE
int "UART communication speed"
range 1200 115200
default 115200
help
UART communication speed for Modbus example.
config EXAMPLE_UART_RXD
int "UART RXD pin number"
range ENV_GPIO_RANGE_MIN ENV_GPIO_IN_RANGE_MAX
default 5
help
GPIO number for UART RX pin. See UART documentation for more information
about available pin numbers for UART.
config EXAMPLE_UART_TXD
int "UART TXD pin number"
range ENV_GPIO_RANGE_MIN ENV_GPIO_OUT_RANGE_MAX
default 4
help
GPIO number for UART TX pin. See UART documentation for more information
about available pin numbers for UART.
config EXAMPLE_TASK_STACK_SIZE
int "UART echo example task stack size"
range 1024 16384
default 2048
help
Defines stack size for UART echo example. Insufficient stack size can cause crash.
endmenu

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/* UART Echo Example
This example code is in the Public Domain (or CC0 licensed, at your option.)
Unless required by applicable law or agreed to in writing, this
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied.
*/
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/uart.h"
#include "driver/gpio.h"
#include "rom/gpio.h"
#include "sdkconfig.h"
#include "esp_log.h"
/**
* This is an example which echos any data it receives on configured UART back to the sender,
* with hardware flow control turned off. It does not use UART driver event queue.
*
* - Port: configured UART
* - Receive (Rx) buffer: on
* - Transmit (Tx) buffer: off
* - Flow control: off
* - Event queue: off
* - Pin assignment: see defines below (See Kconfig)
*/
#define ECHO_TEST_TXD (CONFIG_EXAMPLE_UART_TXD)
#define ECHO_TEST_RXD (CONFIG_EXAMPLE_UART_RXD)
#define ECHO_TEST_RTS (UART_PIN_NO_CHANGE)
#define ECHO_TEST_CTS (UART_PIN_NO_CHANGE)
#define ECHO_UART_PORT_NUM (CONFIG_EXAMPLE_UART_PORT_NUM)
#define ECHO_UART_BAUD_RATE (CONFIG_EXAMPLE_UART_BAUD_RATE)
#define ECHO_TASK_STACK_SIZE (CONFIG_EXAMPLE_TASK_STACK_SIZE)
static const char *TAG = "UART TEST";
#define BUF_SIZE (1024)
static void echo_task(void *arg)
{
/* Configure parameters of an UART driver,
* communication pins and install the driver */
uart_config_t uart_config = {
.baud_rate = 50, // ECHO_UART_BAUD_RATE,
.data_bits = UART_DATA_5_BITS,
.parity = UART_PARITY_DISABLE,
.stop_bits = UART_STOP_BITS_1,
.flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
.source_clk = UART_SCLK_DEFAULT,
};
int intr_alloc_flags = 0;
#if CONFIG_UART_ISR_IN_IRAM
intr_alloc_flags = ESP_INTR_FLAG_IRAM;
#endif
ESP_ERROR_CHECK(uart_driver_install(ECHO_UART_PORT_NUM, BUF_SIZE * 2, 0, 0, NULL, intr_alloc_flags));
ESP_ERROR_CHECK(uart_param_config(ECHO_UART_PORT_NUM, &uart_config));
ESP_ERROR_CHECK(uart_set_pin(ECHO_UART_PORT_NUM, ECHO_TEST_TXD, ECHO_TEST_RXD, ECHO_TEST_RTS, ECHO_TEST_CTS));
// Configure a temporary buffer for the incoming data
uint8_t *data = (uint8_t *) malloc(BUF_SIZE);
while (1) {
ESP_LOGI(TAG, "hello!");
data[0] = 0xaa;
uart_write_bytes(ECHO_UART_PORT_NUM, (const char*) data, 1);
// Read data from the UART
// int len = uart_read_bytes(ECHO_UART_PORT_NUM, data, (BUF_SIZE - 1), 20 / portTICK_PERIOD_MS);
// Write data back to the UART
//uart_write_bytes(ECHO_UART_PORT_NUM, (const char *) data, len);
//if (len) {
// data[len] = '\0';
// ESP_LOGI(TAG, "Recv str: %s", (char *) data);
//}
}
}
#define BLINK_GPIO 22
void bitbang_word(uint8_t word)
{
const TickType_t bitDelay = 20 / portTICK_PERIOD_MS;
const TickType_t stopDelay = 20 / portTICK_PERIOD_MS;
gpio_set_level(BLINK_GPIO, 1);
vTaskDelay( bitDelay );
for (uint8_t i = 0 ; i < 5; i++) {
// ESP_LOGI(TAG, "[%d]: %d", i, !(word & (1 << (4-i))));
gpio_set_level(BLINK_GPIO, !(word & (1 << i)));
vTaskDelay( bitDelay );
}
gpio_set_level(BLINK_GPIO, 0);
vTaskDelay( stopDelay );
}
static void bitbang_task(void* arg)
{
const TickType_t xDelay = 1000 / portTICK_PERIOD_MS;
ESP_LOGI(TAG, "hello!");
gpio_pad_select_gpio(BLINK_GPIO);
gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT);
for( ;; )
{
bitbang_word(0b11011);
bitbang_word(0b01001);
//bitbang_word(0b11111);
//bitbang_word(0b01101);
//bitbang_word(0b11000);
//bitbang_word(0b01101);
//bitbang_word(0b11000);
//bitbang_word(0b00100);
//bitbang_word(0b10110);
//bitbang_word(0b00011);
//bitbang_word(0b10110);
//bitbang_word(0b00011);
ESP_LOGI(TAG, "done");
vTaskDelay( xDelay );
}
}
void app_main(void)
{
xTaskCreate(bitbang_task, "bitbang_task", ECHO_TASK_STACK_SIZE, NULL, 10, NULL);
// xTaskCreate(echo_task, "uart_echo_task", ECHO_TASK_STACK_SIZE, NULL, 10, NULL);
}