tm1637: Copy code from esp8266-clock

main/CMakeLists.txt

@@ -1,2 +1,2 @@
-idf_component_register(SRCS "esp32_alarm_clock_main.c" "wifi.c" "storage.c" "api.c" "ds3231.c" "bcd.c"
+idf_component_register(SRCS "esp32_alarm_clock_main.c" "wifi.c" "storage.c" "api.c" "ds3231.c" "bcd.c" "tm1637.c"
                     INCLUDE_DIRS "")

main/tm1637.c

@@ -0,0 +1,120 @@
+/*
+ * SPDX-FileCopyrightText: 2022 Helmut Pozimski <helmut@pozimski.eu>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ */
+
+#include <stdint.h>
+#include <driver/gpio.h>
+
+#include "tm1637.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#define DATA_COMMAND 0x40
+#define DISPLAY_ON_COMMAND 0x88
+#define DISPLAY_OFF_COMMAND 0x80
+#define ADDRESS_COMMAND 0xC0
+
+static void delay() {
+    vTaskDelay(1 / portTICK_PERIOD_MS);
+}
+
+esp_err_t tm1637_init(tm1637_config *config, uint8_t clk_pin, uint8_t dio_pin, bool show_colon, uint8_t brightness) {
+    gpio_config_t io_conf;
+    esp_err_t ret;
+    io_conf.intr_type = GPIO_INTR_DISABLE;
+    io_conf.mode = GPIO_MODE_OUTPUT;
+    io_conf.pin_bit_mask = ((1ULL << clk_pin)) | ((1ULL << dio_pin));
+    io_conf.pull_down_en = 0;
+    io_conf.pull_up_en = 0;
+    ret = gpio_config(&io_conf);
+    config->clk_pin = clk_pin;
+    config->dio_pin = dio_pin;
+    config->show_colon = show_colon;
+    config->brightness = brightness;
+    gpio_set_level(dio_pin, 1);
+    gpio_set_level(clk_pin, 1);
+    delay();
+    return ret;
+}
+
+static void start_transfer(tm1637_config *config) {
+    gpio_set_level(config->dio_pin, 0);
+    delay();
+}
+
+static void stop_transfer(tm1637_config *config) {
+    gpio_set_level(config->dio_pin, 0);
+    delay();
+    gpio_set_level(config->clk_pin, 1);
+    delay();
+    gpio_set_level(config->dio_pin, 1);
+    delay();
+}
+
+static void write_byte(tm1637_config *config, uint8_t byte) {
+    uint8_t data = byte;
+
+    for (uint8_t i = 0; i < 8; i++) {
+        gpio_set_level(config->clk_pin, 0);
+        delay();
+        gpio_set_level(config->dio_pin, data & 0x01);
+        delay();
+        gpio_set_level(config->clk_pin, 1);
+        delay();
+        data = data >> 1;
+    }
+
+    gpio_set_level(config->clk_pin, 0);
+    delay();
+    gpio_set_level(config->dio_pin, 1);
+    delay();
+    gpio_set_level(config->clk_pin, 1);
+
+    delay();
+
+    gpio_set_direction(config->dio_pin, GPIO_MODE_INPUT);
+
+    delay();
+
+    int result = -1;
+
+    while (result != 0) {
+        result = gpio_get_level(config->dio_pin);
+    }
+
+    delay();
+    gpio_set_level(config->clk_pin, 0);
+    delay();
+    gpio_set_direction(config->dio_pin, GPIO_MODE_OUTPUT);
+    delay();
+}
+
+void tm1637_set_segment(tm1637_config *config, uint8_t value, uint8_t segment, bool enable_display) {
+    uint16_t write_value = NUMERALS[value];
+    if (config->show_colon) {
+        write_value |= 0x80;
+    }
+    start_transfer(config);
+    write_byte(config, DATA_COMMAND);
+    stop_transfer(config);
+
+    start_transfer(config);
+    write_byte(config, ADDRESS_COMMAND | segment);
+
+    write_byte(config, write_value);
+    stop_transfer(config);
+
+    start_transfer(config);
+    if (enable_display) {
+        write_byte(config, DISPLAY_ON_COMMAND | (config->brightness & 0x07));
+    } else {
+        write_byte(config, DISPLAY_OFF_COMMAND | (config->brightness & 0x07));
+    }
+    stop_transfer(config);
+}
+ 
+ 
+ 

main/tm1637.h

@@ -0,0 +1,33 @@
+/*
+ * SPDX-FileCopyrightText: 2022 Helmut Pozimski <helmut@pozimski.eu>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct {
+    uint8_t clk_pin;
+    uint8_t dio_pin;
+    bool show_colon;
+    uint8_t brightness;
+} tm1637_config;
+
+static const uint16_t NUMERALS[] = {
+        0x3f,
+        0x06,
+        0x5b,
+        0x4f,
+        0x66,
+        0x6d,
+        0x7d,
+        0x07,
+        0x7f,
+        0x6f,
+        0x00
+};
+
+esp_err_t tm1637_init(tm1637_config *config, uint8_t clk_pint, uint8_t dio_pin, bool show_colon, uint8_t brightness);
+
+void tm1637_set_segment(tm1637_config *config, uint8_t value, uint8_t segment, bool enable_display);