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(→‎Réception des trames de Téléinformation EdF)
(→‎Réception des trames de Téléinformation EdF)
Ligne 14 : Ligne 14 :
 
**passage du Baudrate par défaut  1200 Bauds
 
**passage du Baudrate par défaut  1200 Bauds
 
**modification du diviseur de l'UART pour 1200 bauds : on diminue la valeur de 1%. Cela revient à paramétrer un baudrate de 1212 bauds. En effet l'UART du PIC s'attend à avoir un bit de stop entier à la fin de chaque octet. Or la sortie téléfinformation EdF n'envoie qu'un seul bit de stop. Ce qui fait que l'UART du PIC rate parfois le front start de l'octet suivant et donc l'octet en entier. Pour remédier à ce problème on augmente la cadence de l'UART du PIC de 1%, cela permet d'être sur que l'échantillonnage du bit de stop est terminée lorsque le front start de l'octet suivant arrive. Cela n'a pas d'influence sur le décodage.  
 
**modification du diviseur de l'UART pour 1200 bauds : on diminue la valeur de 1%. Cela revient à paramétrer un baudrate de 1212 bauds. En effet l'UART du PIC s'attend à avoir un bit de stop entier à la fin de chaque octet. Or la sortie téléfinformation EdF n'envoie qu'un seul bit de stop. Ce qui fait que l'UART du PIC rate parfois le front start de l'octet suivant et donc l'octet en entier. Pour remédier à ce problème on augmente la cadence de l'UART du PIC de 1%, cela permet d'être sur que l'échantillonnage du bit de stop est terminée lorsque le front start de l'octet suivant arrive. Cela n'a pas d'influence sur le décodage.  
−
* serint.c : on ne tient plus compte du Frame Error byte (à confirmer)
+
* serint.c : on ne tient plus compte du Frame Error. En effet la réception était arrêtée puis redémarrée dans ce cas, ce qui n'est pas la méthode préconisée dans la datasheet du PIC.  Cette modification est optionnelle.
 
* teleinfo.h et teleinfo.c : ajout de ces deux fichiers qui contionnent les définitions et le code nécessaire pour la réception des trames de téléinformation (taille max 170 octets)
 
* teleinfo.h et teleinfo.c : ajout de ces deux fichiers qui contionnent les définitions et le code nécessaire pour la réception des trames de téléinformation (taille max 170 octets)
  

Version du 2 novembre 2011 à 16:04

Attention cette page n'est pas terminée et est en travaux

Le but de cet article est de décrire la conception du logiciel WebSampling utilisé pour la Carte d'Acquisition Web.

V1.0.x

La version 1.0 est conçue à partir du logiciel Modtronix SBC68EC Webserver V3.06. Poremplir les fonction de la Carte d'Acquisition Web, il est nécessaire de lui ajouter les fonctionnalités suivantes :

  • Réception des trames de téléinformation EdF
  • Mise en place d'un client HTTP emettant des requêtes contenant ces trames de téléinformations ainsi que les valeurs de ports analogiques
  • Ajout d'un automate cadençant l'émission de ces requêtes toutes les minutes

Réception des trames de Téléinformation EdF

Pour réaliser cette fonction, il est nécessaire de modifier les fichiers suivants :

  • projdefs.h :
    • passage des tailles de buffer UART Rx/Tx à 32 et 8 octets
  • appcfg.c :
    • passage du Baudrate par défaut 1200 Bauds
    • modification du diviseur de l'UART pour 1200 bauds : on diminue la valeur de 1%. Cela revient à paramétrer un baudrate de 1212 bauds. En effet l'UART du PIC s'attend à avoir un bit de stop entier à la fin de chaque octet. Or la sortie téléfinformation EdF n'envoie qu'un seul bit de stop. Ce qui fait que l'UART du PIC rate parfois le front start de l'octet suivant et donc l'octet en entier. Pour remédier à ce problème on augmente la cadence de l'UART du PIC de 1%, cela permet d'être sur que l'échantillonnage du bit de stop est terminée lorsque le front start de l'octet suivant arrive. Cela n'a pas d'influence sur le décodage.
  • serint.c : on ne tient plus compte du Frame Error. En effet la réception était arrêtée puis redémarrée dans ce cas, ce qui n'est pas la méthode préconisée dans la datasheet du PIC. Cette modification est optionnelle.
  • teleinfo.h et teleinfo.c : ajout de ces deux fichiers qui contionnent les définitions et le code nécessaire pour la réception des trames de téléinformation (taille max 170 octets)

Client HTTP

projdefs.h

//Define the port used for the HTTP client, default is 80

  1. define DEFAULT_HTTPCLIENT_PORT (80)

//Configured Server port for data upload

  1. define HOST_PORT ((((WORD)appcfgGetc(APPCFG_HOST_PORTH))<<8) | (WORD)appcfgGetc(APPCFG_HOST_PORTL))
  1. define STACK_CLIENT_MODE
  2. define STACK_USE_DNS

Fichier appcfg.h : Mise à jour du mapping EEPROM pour sauvegarder le host name, son IP et le port utilisé

Fichier appcfg.c : ajout des valeurs par défaut pour les paramêtres EEPROM ci-dessus

Fichier http.c : modification afin que la fonction sendfile soit appelée avec pour paramêtre un handle de liaison TCP et pas un index sur le tableau de handle interne au serveur http. Fichier httpclient.c : copie modifiée de tcputils.c afin de pouvoir envoyer des fichiers parsés à l'aide de la fonction sendfile de http.c.

Automate

  • mxwebsrvr.c : code de l'automate

Commandes Utilisateur

  • cmd.h : definion des commande de modification du host name ('h') et du path de l'URL d'upload ('r')
  • cmd.c : code de traitement pour la modification des paramêtres du serveur http cible :host name, IP, port,path de l'URL.
  • httpexec.h : définition des commande de lecture de des paramêtres du serveur http cible :host name,path de l'URL.
  • httpexec.c :code de lecture de des paramêtres du serveur http cible :host name,path de l'URL.
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