So I have this code below. i'm trying to read a series of bytes for a file on an sd card. The card reader checks out and works great on the demo files that are with the arduino and a few small read, write, read etc... files I wrote. Here is the issue I'm seeing. When the readIngredients() function is called, nothing prints to serial, not even the initial initialization print lines. When I remove the parameters to readIngredients, everything prints finr. but I think thats a sign of something failing.
the structs look like this they are in a header file that is included. all the constants are defined in the file too but, that is quite long so I wont bother posting it unless it makes a difference.
typedef struct {
char name[NAME_SIZE];
short amount;
} ingredient;
/* Drink data structure
name - name of ingredient
ingredient - list of ingredients in recipe
numIngreds - number of ingreds for this drink
*/
typedef struct {
char name[NAME_SIZE];
ingredient ingred[MAX_INGREDS_PER_DRINK];
int numIngreds;
} drink;
typedef struct {
int pinNum;
int state;
} pin;
const pin PINS[NUM_PINS] = {{LCD_CTRL_0,OUTPUT},{LCD_CTRL_1,OUTPUT},
{PUMP1,OUTPUT},{PUMP2,OUTPUT},{PUMP3,OUTPUT},{PUMP4,OUTPUT},{PUMP5,OUTPUT},{PUMP6,OUTPUT}
};
And here is the file. pretty much the read ingredients funcition calls the readData function which reads a number of bytes from the file and places them into a string which then in readIngredients gets placed into the array of ingredients
Any comments or help are greatly appreciated.. Ive been banging my head on this for many hours. I did write a similar program in C to just test my pointer logic, and it seemed to work, but removing all the code except for the function decleration still leads to the issues I'm experiencing.
#include "defs.h"
#include <SD.h>
#include <string.h>
// list of all possible ingredients
ingredient _ingredients[MAX_INGREDIENTS];
// list of ingredients in the ingredient holders
ingredient _selectedIngredients[MAX_INGREDS_PER_DRINK];
// list of all possible drink recipes
drink _drinks[MAX_DRINKS];
File myRecipeList;
File myConfig;
// drinkIndex -- currently selected Drink
// ingredIndex -- currently selected Ingredient holder
// numDrinks -- Number of Drinks that have been read from the SD Card
// numIngreds -- Number of Ingredients that have been read from the SD Card
int drinkIndex = 0, ingredIndex = 0,
recipePageIndex = 0, numDrinks = 0,
numIngreds = 0, recipeIndex = 0;
//This should be moved to main so you can call all the crap with direct pointers
void setup() {
Serial.begin(9600);
Serial.print("Begin");
for (int i = 0 ; i < NUM_PINS; i++) {
pinMode(PINS[i].pinNum, PINS[i].state);
Serial.print(PINS[i].pinNum);
Serial.print(":");
Serial.print(PINS[i].state);
Serial.print("\n");
}
// Initialize SD Card
if (!SD.begin(4)) {
return; // fail if we can't
}
myRecipeList = (SD.open("recipe.dat",FILE_READ));
if (myRecipeList) {
// Read ingredients first, then read recipes
//Serial.print("File opened... reading ingredients \n");
readIngredients((ingredient*)&_selectedIngredients,(ingredient*)&_ingredients);
// Serial.print("File opened... reading recipes \n");
// readRecipes(_drinks,_selectedIngredients);
}
myRecipeList.close();
}
// Close file
void loop() {
}
void readData(char * myString, int len) {
for (int i =0 ; i < len; i++)
myString[i] = myRecipeList.read();
}
void readIngredients(ingredient * selectedIngredients,ingredient * ingredients) {
Serial.print("reading ingredients..");
boolean done = false;
ingredient * myIngred;
numIngreds=0;
while ( numIngreds < MAX_INGREDIENTS && myRecipeList.available()) {
myIngred = (ingredient*)&ingredients[numIngreds];
readData(myIngred->name, NAME_SIZE);
char amnt[AMNT_SIZE];
readData(amnt,AMNT_SIZE);
myIngred->amount = atoi(amnt)/100.0;
numIngreds++;
}
// Default to first ingredient in list (should be water)
// Load this ingredient into all six ingredients holders
int i = 0;
for (; i < MAX_INGREDS_PER_DRINK; i++){}
strcpy((char*)selectedIngredients[i].name,ingredients[0].name);
}
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