use timer

main/display.c

@@ -59,7 +59,7 @@ void display_init(){
     gpio_set_level(GPIO_OE, 0);
 }
 
-void display_cycle(){
+void display_cycle(void* arg){
     static uint8_t line = 0;
 
     for(uint8_t i=0;i<128;i++){

main/display.h

@@ -31,6 +31,6 @@ void write_address(uint8_t addr);
 void latch(void);
 void clock(void);
 void display_init(void);
-void display_cycle(void);
+void display_cycle(void* arg);
 
 #endif

main/main.c

@@ -11,9 +11,7 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "esp_system.h"
-#include "esp_spi_flash.h"
-
-#include "driver/gpio.h"
+#include "esp_timer.h"
 
 #include "display.h"
 #include "text.h"
@@ -26,14 +24,23 @@
 #define CHIP_NAME "ESP32-S2 Beta"
 #endif
 
+const esp_timer_create_args_t periodic_timer_args = {
+    .callback = &display_cycle,
+    /* name is optional, but may help identify the timer when debugging */
+    .name = "display"
+};
 
 void app_main(void)
 {
     printf("Hello world!\n");
     display_init();
 
+    esp_timer_handle_t periodic_timer;
+    ESP_ERROR_CHECK(esp_timer_create(&periodic_timer_args, &periodic_timer));
+    ESP_ERROR_CHECK(esp_timer_start_periodic(periodic_timer, 500));
+
     put_line(fb, 2, "429 Amalienplatz", 1, 1);
     for (;;) {
-        display_cycle();
+        vTaskDelay(1);
     }
 }