From b87e2b846d4114369084869e43bfa5f08d5e934e Mon Sep 17 00:00:00 2001
From: Eggert Jung <eggert.s.jung@wischhof13.de>
Date: Fri, 21 May 2021 05:48:55 +0200
Subject: [PATCH] menu

---
 main.c   | 33 ++++++++++++++++++++++++++++++---
 makefile |  2 +-
 2 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/main.c b/main.c
index 92bd32f..269adb4 100644
--- a/main.c
+++ b/main.c
@@ -12,19 +12,23 @@
 #include "lcd.h"
 #include "i2c.h"
 #include "modbus.h"
+#include "menu.h"
 
-volatile uint16_t holdingRegisters[4];
+volatile uint16_t holdingRegisters[10];
 
 void modbusGet(void) {
 	if (modbusGetBusState() & (1<<ReceiveCompleted))
 	{
         switch(rxbuffer[1]) {
             case fcReadHoldingRegisters:
+                i2c_start(0x71);
+                holdingRegisters[0] = i2c_readNak();
+                i2c_stop();
             case fcPresetSingleRegister:
             case fcPresetMultipleRegisters:
                 modbusExchangeRegisters(holdingRegisters,0,4);
-                lcd_home();
-                lcd_write("test %x", holdingRegisters[0]);
+                lcd_set_position(holdingRegisters[1], holdingRegisters[2]);
+                lcd_write("test");
                 break;
             default:
                 modbusSendException(ecIllegalFunction);
@@ -33,6 +37,26 @@ void modbusGet(void) {
 	}
 }
 
+void do_buttons(){
+    //i2c_start(0x71);
+    //uint8_t buttons = i2c_readNak();
+    //i2c_stop();
+    ////TODO error handling
+
+    //if(buttons & (1 << 0))
+    //    set_item(1);
+    //else if(buttons & (1 << 1))
+    //    set_item(2);
+    //else if(buttons & (1 << 2))
+    //    set_item(2);
+    //else if(buttons & (1 << 2))
+    //    set_item(3);
+    //else if(buttons & (1 << 3))
+    //    set_item(4);
+    //else if(buttons & (1 << 4))
+    //    set_item(5);
+}
+
 int main(void)
 {
 	i2c_init();
@@ -47,8 +71,11 @@ int main(void)
     TCCR0B|=(1<<CS01); //prescaler 8
 	TIMSK0|=(1<<TOIE0);
 
+    draw_menu();
+
 	while(1){
         modbusGet();
+        do_buttons();
 	}
 }
 
diff --git a/makefile b/makefile
index e6c5f93..53488e8 100644
--- a/makefile
+++ b/makefile
@@ -1,5 +1,5 @@
 TARGET  = main
-FILES   = main i2c lcd modbus
+FILES   = main i2c lcd modbus menu
 MCU     = atmega328p
 PROGC	= m328p
 CC      = avr-gcc