master
Ondřej Hruška 3 years ago
commit 8199f10bda
  1. 3
      .gitignore
  2. 6
      CMakeLists.txt
  3. 8
      Makefile
  4. 52
      README.md
  5. 2
      main/CMakeLists.txt
  6. 4
      main/component.mk
  7. 90
      main/hello_world_main.c
  8. 1289
      sdkconfig

3
.gitignore vendored

@ -0,0 +1,3 @@
.idea/
build
cmake-build-*

@ -0,0 +1,6 @@
# 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(hello-world)

@ -0,0 +1,8 @@
#
# This is a project Makefile. It is assumed the directory this Makefile resides in is a
# project subdirectory.
#
PROJECT_NAME := hello-world
include $(IDF_PATH)/make/project.mk

@ -0,0 +1,52 @@
# Hello World Example
Starts a FreeRTOS task to print "Hello World".
(See the README.md file in the upper level 'examples' directory for more information about examples.)
## How to use example
Follow detailed instructions provided specifically for this example.
Select the instructions depending on Espressif chip installed on your development board:
- [ESP32 Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/stable/get-started/index.html)
- [ESP32-S2 Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/get-started/index.html)
## Example folder contents
The project **hello_world** contains one source file in C language [hello_world_main.c](main/hello_world_main.c). The file is located in folder [main](main).
ESP-IDF projects are built using CMake. The project build configuration is contained in `CMakeLists.txt` files that provide set of directives and instructions describing the project's source files and targets (executable, library, or both).
Below is short explanation of remaining files in the project folder.
```
├── CMakeLists.txt
├── example_test.py Python script used for automated example testing
├── main
   ├── CMakeLists.txt
   ├── component.mk Component make file
   └── hello_world_main.c
├── Makefile Makefile used by legacy GNU Make
└── README.md This is the file you are currently reading
```
For more information on structure and contents of ESP-IDF projects, please refer to Section [Build System](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/build-system.html) of the ESP-IDF Programming Guide.
## Troubleshooting
* Program upload failure
* Hardware connection is not correct: run `idf.py -p PORT monitor`, and reboot your board to see if there are any output logs.
* The baud rate for downloading is too high: lower your baud rate in the `menuconfig` menu, and try again.
## Technical support and feedback
Please use the following feedback channels:
* For technical queries, go to the [esp32.com](https://esp32.com/) forum
* For a feature request or bug report, create a [GitHub issue](https://github.com/espressif/esp-idf/issues)
We will get back to you as soon as possible.

@ -0,0 +1,2 @@
idf_component_register(SRCS "hello_world_main.c"
INCLUDE_DIRS "")

@ -0,0 +1,4 @@
#
# "main" pseudo-component makefile.
#
# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)

@ -0,0 +1,90 @@
/* Hello World 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 "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_spi_flash.h"
#include "driver/ledc.h"
void app_main(void)
{
printf("Hello world!\n");
/*
* Prepare and set configuration of timers
* that will be used by LED Controller
*/
ledc_timer_config_t ledc_timer = {
.duty_resolution = LEDC_TIMER_8_BIT, // resolution of PWM duty
.freq_hz = 38500, // frequency of PWM signal
.speed_mode = LEDC_HIGH_SPEED_MODE, // timer mode
.timer_num = LEDC_TIMER_0, // timer index
.clk_cfg = LEDC_AUTO_CLK, // Auto select the source clock
};
// Set configuration of timer0 for high speed channels
ledc_timer_config(&ledc_timer);
ledc_channel_config_t chan = {
.channel = LEDC_CHANNEL_0,
.duty = 127,
.gpio_num = 17,
.speed_mode = LEDC_HIGH_SPEED_MODE,
.hpoint = 0,
.timer_sel = LEDC_TIMER_0
};
ledc_channel_config(&chan);
#define PWM_ON() do { \
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 127); \
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0); \
} while(0)
#define PWM_OFF() do { \
ledc_stop(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 0); \
} while(0)
while (1) {
//const uint8_t bytes[4] = {0b10000000, 0b01111111, 0b00010000, 0b11101111}; // and one 1 at the end
const uint8_t bytes[4] = {0b10000000 , 0b01111111 , 0b00000000 , 0b11111111}; // and one 1 at the end
// Preamble
PWM_ON();
ets_delay_us(9000);
PWM_OFF();
ets_delay_us(4500);
for (int i = 0; i < 4; i++) {
uint8_t byte = bytes[i];
for (int j = 0; j < 8; j++) {
bool bit = 0 != (byte & 0x80);
byte <<= 1;
if (bit==0) {
PWM_ON();
ets_delay_us(588);
PWM_OFF();
ets_delay_us(540);
} else {
PWM_ON();
ets_delay_us(590);
PWM_OFF();
ets_delay_us(1672);
}
}
}
PWM_ON();
ets_delay_us(600);
PWM_OFF();
ets_delay_us(1700);
vTaskDelay(pdMS_TO_TICKS(1000));
}
}

File diff suppressed because it is too large Load Diff
Loading…
Cancel
Save