Add start of TC and design for init image

due_obd2/due_obd2.ino

@@ -71,79 +71,36 @@ void on_init_enter()
 void on_init_run()
 {
   Serial.println("Running!");
-  if (!flag)
-  {
-    flag = 1;
-    main_color = ~main_color;
-    // display.clrScr();
-    if (main_color)
-    {
-      display.setColor(VGA_RED);
-      display.fillCircle(10,20,100);
-    } else 
-    {
-      display.setColor(VGA_TEAL);
-      display.fillCircle(30,50,131);
-    }
-    display.setColor(VGA_AQUA);
-    display.setBackColor(0,0,0);
-    text_temp[0] = init_text[init_text_i];
-    display.print(text_temp, init_text_x, LCD_H / 2);
-    init_text_x += display.getFontXsize();
-    init_text_i++;
-    if (init_text_i > 14)
-    {
-      init_text_i = 0;
-      display.clrScr();
-    }
-  }
 
 }
 
 void on_init_exit()
 {
   Serial.println("Exiting init state!");
-  flag = 0;
-  main_color = 0;
   display.clrScr();
 }
 
 void on_main_enter()
 {
-  obd2_timer_reset();
+  obd2_RTT_reset();
   Serial.println("Entering main loop");
-  obd2_timer_set_period(800);
 }
 
 void on_main_run()
 {
-  if (!flag)
-  {
-    led_state = ~led_state;
-    digitalWrite(LED_BUILTIN, led_state);
-    flag = 1;
-    main_color = ~main_color;
-    if (main_color)
-      display.setColor(255, 0, 166);
-    else
-      display.setColor(78, 181, 72);
-    display.fillRect(LCD_W / 2 - 200, LCD_H / 2 - 100, LCD_W / 2 + 200, LCD_H / 2 + 100);
-    display.setColor(0, 247, 255);
-    display.print("OBD2 display yeet", CENTER, LCD_H / 2);
-#if (DEBUG == 1)
-    Serial.println("switching led");
-#endif
-  }
+
 }
 
 void RTT_Handler()
 {
   flag = 0;
-  obd2_timer_reset();
+  obd2_RTT_reset();
 }
 
 void setup()
 {
+
+  /* TODO change for TRNG (section 42 of datasheet)*/
   randomSeed(analogRead(0));
 
 #if (DEBUG == 1)
@@ -162,7 +119,7 @@ void setup()
 
   pinMode(LED_BUILTIN, OUTPUT);
 
-  obd2_timer_init();
+  obd2_RTT_init();
   statemachine_register_state(&init_state, STATE_INIT);
   statemachine_register_state(&main_state, STATE_CAR_INFO);
   statemachine_init();

due_obd2/obd2_timer.c

@@ -1,10 +1,6 @@
-#include "sam3xa/include/sam3x8e.h"
-#include "sam3xa/include/component/component_rtt.h"
-// #include "sam3xa/include/component/component_rtt.h"
-// #include "sam3xa/include/sam3x8e.h"
 #include "obd2_timer.h"
 
-void obd2_timer_init(void)
+void obd2_RTT_init(void)
 {
   /* enable the timer: reset the RTT
   RTT->RTT_MR = RTT_MR_RTTRST;
@@ -12,16 +8,16 @@ void obd2_timer_init(void)
   RTT->RTT_AR = 0;
 }
 
-void obd2_timer_enable()
+void obd2_RTT_enable()
 {
-  /* enable the alarm interrupt*/
-  RTT->RTT_MR |= RTT_MR_ALMIEN;
+  /* enable the alarm interrupt and set the prescaler to the processor frequency to generate an interrupt every second*/
+  RTT->RTT_MR |= RTT_MR_ALMIEN | RTT_MR_RTPRES(CLOCK_FREQ);
 
   /* enable the interrupt*/
   NVIC_EnableIRQ(RTT_IRQn);
 }
 
-void obd2_timer_reset()
+void obd2_RTT_reset()
 {
   /* To prevent several executions of the interrupt handler,
    the interrupt must be disabled in the interrupt handler
@@ -41,8 +37,14 @@ void obd2_timer_reset()
   RTT->RTT_MR |= RTT_MR_RTTRST;
 }
 
-void obd2_timer_set_period(__UINT32_TYPE__ period)
+void obd2_RTT_set_period(__UINT32_TYPE__ period)
 {
   /* set the prescaler value equal to the clock speed divided by how many milliseconds*/
   RTT->RTT_MR |= RTT_MR_RTPRES(CLOCK_FREQ / (1000/period));
 }
+
+void obd2_TC_init()
+{
+  /* enable the timer/counter 0*/
+  TC0->TC_CHANNEL[0].TC_CCR |= TC_CCR_CLKEN;
+}

due_obd2/obd2_timer.h

@@ -10,10 +10,12 @@ extern "C"
 
 #define CLOCK_FREQ 32768
 
-void obd2_timer_init();
-void obd2_timer_reset();
-void obd2_timer_enable();
-void obd2_timer_set_period(__UINT32_TYPE__ period);
+void obd2_RTT_init();
+void obd2_RTT_reset();
+void obd2_RTT_enable();
+void obd2_RTT_set_period(__UINT32_TYPE__ period);
+
+void obd2_TC_init();
 
 #ifdef __cplusplus
 }

readme.md

@@ -21,3 +21,10 @@
 - [Product link](https://www.tinytronics.nl/shop/en/displays/tft/3.5-inch-tft-display-320*480-pixels-mega-compatible-ili9486)
 - [UTFT library](http://www.rinkydinkelectronics.com/library.php?id=51)
 - [SdFat library](https://github.com/greiman/SdFat)
+
+
+## Design
+
+### INIT display
+![init design](img/design_init_display.png)
+red = animation, yellow is order of appearance