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Calculate distance in cm, Display brightness

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jonny_ji7 2022-08-17 07:56:27 +02:00
parent f7b9309819
commit e7ffb6348a
1 changed files with 13 additions and 1 deletions
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14
main/main.c
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@ -31,6 +31,9 @@
#define ENABLE_HALF_STEPS false // Set to true to enable tracking of rotary encoder at half step resolution #define ENABLE_HALF_STEPS false // Set to true to enable tracking of rotary encoder at half step resolution
#define FLIP_DIRECTION false // Set to true to reverse the clockwise/counterclockwise sense #define FLIP_DIRECTION false // Set to true to reverse the clockwise/counterclockwise sense
#define MEASURING_ROLL_DIAMETER 44
#define PI 3.14159265358979323846
@ -84,8 +87,13 @@ void task(void *pvParameter)
ESP_ERROR_CHECK(max7219_init(&dev)); ESP_ERROR_CHECK(max7219_init(&dev));
//0...15
ESP_ERROR_CHECK(max7219_set_brightness(&dev, 12));
char buf[10]; // 8 digits + decimal point + \0 char buf[10]; // 8 digits + decimal point + \0
int32_t distance_mm = 0;
//display startup message //display startup message
max7219_clear(&dev); max7219_clear(&dev);
@ -110,8 +118,12 @@ void task(void *pvParameter)
event.state.direction ? (event.state.direction == ROTARY_ENCODER_DIRECTION_CLOCKWISE ? "CW" : "CCW") : "NOT_SET"); event.state.direction ? (event.state.direction == ROTARY_ENCODER_DIRECTION_CLOCKWISE ? "CW" : "CCW") : "NOT_SET");
//--- calculate distalce ---
distance_mm = event.state.position * (MEASURING_ROLL_DIAMETER * PI / 600); //TODO dont calculate constant factor every time
//--- show current position on display --- //--- show current position on display ---
sprintf(buf, "%08d", event.state.position); //sprintf(buf, "%08d", event.state.position);
//--- show current distance in cm on display ---
sprintf(buf, "%06.1f cm", (float)distance_mm/10);
//printf("float num\n"); //printf("float num\n");
max7219_clear(&dev); max7219_clear(&dev);
max7219_draw_text_7seg(&dev, 0, buf); max7219_draw_text_7seg(&dev, 0, buf);