Reading config parameter works

prosjekt.X/command-handler.c

@@ -54,7 +54,7 @@ void parse_command(uint8_t command[], uint8_t command_len) {
     return;
   }
 
-  // Validate that we have a first parameter, else requirements for command are
+  // Validate that we have a second parameter, else requirements for command are
   // not fulfilled. return unknown command.
   if (command_len < 2) {
     context.command = UNKNOWN_COMMAND;
@@ -69,7 +69,11 @@ void parse_command(uint8_t command[], uint8_t command_len) {
   // Configuration parameters
   case 0x11: // Read config
   case 0x21: // Write config
-    // TODO: Handle parameters for config
+      if (param == 0x01) {
+          context.conf = SAMPLE_TIME;
+      } else {
+          context.conf = CNF_NONE;
+      }
     break;
 
   // Voltage parameters
@@ -104,9 +108,9 @@ void parse_command(uint8_t command[], uint8_t command_len) {
     break;
   }
 
-  ////////////////////////////////
-  // Second parameter selection //
-  ////////////////////////////////
+  /////////////////////////////////
+  //  Third parameter selection  //
+  /////////////////////////////////
 
   // Check if the command does not require a second parameter. If it does not,
   // return. Only config write requires a second parameter.
@@ -114,7 +118,7 @@ void parse_command(uint8_t command[], uint8_t command_len) {
     return;
   }
 
-  // Validate that we have a first parameter, else requirements for command are
+  // Validate that we have a third parameter, else requirements for command are
   // not fulfilled. return unknown command.
   if (command_len < 3) {
     context.command = UNKNOWN_COMMAND;
@@ -124,7 +128,31 @@ void parse_command(uint8_t command[], uint8_t command_len) {
   // Store the parameter
   param = command[2];
 
-  // TODO: Handle the config parameters
+  context.conf = param;
+  
+
+  ////////////////////////////////
+  // Fourth parameter selection //
+  ////////////////////////////////
+  
+  // Validate that we have a fourth parameter, else requirements for command are
+  // not fulfilled. return unknown command. Second parameter is u16, thus two bytes.
+  if (command_len < 5) {
+    context.command = UNKNOWN_COMMAND;
+    return;
+  }
+  
+  // Extract the value
+  union {
+      uint16_t value;
+      uint8_t bytes[2];
+  } config_value;
+  
+  config_value.bytes[0] = command[3];
+  config_value.bytes[1] = command[4];
+  
+  // Store the value
+  context.conf_val = config_value.value;
   
   // exit
   return;
@@ -135,7 +163,25 @@ uint8_t route_command(int pos) {
     case WRITE_CONFIG:
       return WRITE_CONFIG;
     case READ_CONFIG:
-      return READ_CONFIG;
+    {
+        // Validate that pos is within the valid range
+        if (pos >= 2) { return 0x00; }
+        
+        // Config only has one parameter so we sent that parameter
+        // Create a union to store the data
+        union {
+            uint16_t value;
+            uint8_t bytes[2];
+        } config_value;
+        config_value.value = config.ms_fanspeed_sample_rate;
+        
+        uint8_t data = config_value.bytes[1-pos];
+        
+        // Return the corresponding data byte
+        return data;
+    }
+        break;
+      
     case READ_VOLTAGE:
     {
         // Create a union to store the data

prosjekt.X/command-handler.h

@@ -42,6 +42,7 @@ typedef enum {
 // Enum of all valid config options
 // TODO: Move into config header file
 typedef enum {
+  SAMPLE_TIME = 0x01,   // Time between each fan speed sample
   CNF_NONE,             // No config option
 } config_option_t;
 
@@ -59,13 +60,17 @@ typedef struct {
   src_voltage_t src_voltage; // The selected voltage source
   fans_t fan;                // The selected fan
   config_option_t conf;      // The configuration option to cange
-                             // TODO: Add config value field for writing
+  uint16_t conf_val;         // The value of the config option to change
 } command_context_t;
 
 // Fan history variables
 extern volatile uint16_t fan1_history[512];
 extern volatile uint16_t fan2_history[512];
 
+// Config
+extern volatile config_t config;
+extern volatile bool store_config;
+
 // Parses the input string and outputs one of the valid commands
 void parse_command(uint8_t *command, uint8_t command_len);
 

prosjekt.X/main.c

@@ -40,7 +40,8 @@ int main() {
   stdout = &USART_stream;
 
   // Read the stored config struct
-  config = read_struct_from_EEPROM();
+  //config = read_struct_from_EEPROM();
+  config.ms_fanspeed_sample_rate = 500;
   
   PORTB.DIRSET = PIN3_bm;