307cad4a9a
new idf project (with idf.py create-project)
add 2 components for encoder and display:
https://github.com/DavidAntliff/esp32-rotary-encoder
https://github.com/UncleRus/esp-idf-lib/tree/master/components/max7219
add code for testing a 7 segment display
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
#include <stdio.h>
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#include <freertos/FreeRTOS.h>
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#include <freertos/task.h>
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#include <esp_idf_version.h>
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#include <max7219.h>
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#ifndef APP_CPU_NUM
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#define APP_CPU_NUM PRO_CPU_NUM
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#endif
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#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(4, 0, 0)
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#define HOST HSPI_HOST
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#else
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#define HOST SPI2_HOST
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#endif
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#define DISPLAY_PIN_NUM_MOSI 23
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#define DISPLAY_PIN_NUM_CLK 18
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#define DISPLAY_PIN_NUM_CS 21
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#define DISPLAY_DELAY 2000
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void task(void *pvParameter)
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{
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// Configure SPI bus
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spi_bus_config_t cfg = {
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.mosi_io_num = DISPLAY_PIN_NUM_MOSI,
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.miso_io_num = -1,
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.sclk_io_num = DISPLAY_PIN_NUM_CLK,
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.quadwp_io_num = -1,
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.quadhd_io_num = -1,
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.max_transfer_sz = 0,
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.flags = 0
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};
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ESP_ERROR_CHECK(spi_bus_initialize(HOST, &cfg, 1));
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// Configure device
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max7219_t dev = {
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.cascade_size = 1,
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.digits = 8,
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.mirrored = true
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};
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ESP_ERROR_CHECK(max7219_init_desc(&dev, HOST, MAX7219_MAX_CLOCK_SPEED_HZ, DISPLAY_PIN_NUM_CS));
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char buf[10]; // 8 digits + decimal point + \0
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ESP_ERROR_CHECK(max7219_init(&dev));
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float count = 0;
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while (1)
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{
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// printf("Display cycle\n");
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//
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// max7219_clear(&dev);
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// max7219_draw_text_7seg(&dev, 0, "12345678");
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// printf("num");
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// vTaskDelay(pdMS_TO_TICKS(DISPLAY_DELAY));
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//
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// max7219_clear(&dev);
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// max7219_draw_text_7seg(&dev, 0, "ABCDEFGH");
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// printf("text");
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// vTaskDelay(pdMS_TO_TICKS(DISPLAY_DELAY));
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//
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if (count > 20){
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count = 0;
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} else {
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count += 0.005;
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}
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sprintf(buf, "%06.3f m", count);
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//printf("float num\n");
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max7219_clear(&dev);
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max7219_draw_text_7seg(&dev, 0, buf);
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vTaskDelay(pdMS_TO_TICKS(10));
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// max7219_clear(&dev);
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// sprintf(buf, "%08x", 12345678);
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// printf("num\n");
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// max7219_draw_text_7seg(&dev, 0, buf);
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// vTaskDelay(pdMS_TO_TICKS(DISPLAY_DELAY));
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}
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}
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void app_main()
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{
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xTaskCreatePinnedToCore(task, "task", configMINIMAL_STACK_SIZE * 3, NULL, 5, NULL, APP_CPU_NUM);
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}
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