Révision 847
Ajouté par albest il y a presque 4 ans
| branch/best/sp4c12/SP4b1/SP4b1/SP4b1.c | ||
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void uart0_tx(char c); //Envoie d'un caract?re
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char uart0_rx(void); //Fonction d'attente et lecture d'un caract?re
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int rectrame(char * Buffer);
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int hex2int(char *c); //Passage hexa en int
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char * Buff;
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/*Variable Globale*/
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int trame_ok;
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void main(void)
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{
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char Buffer[80];
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uart0_init();
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while(1){
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uart0_tx(rectrame(Buff));
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uart0_tx(rectrame(Buffer)+48);
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if (trame_ok == 1){
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uart0_tx('O');
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}
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else{
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uart0_tx('N');
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}
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}
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}
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void uart0_init(void){
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u0mr = 0x05;
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| ... | ... | |
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}
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int rectrame(char * Buffer){
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int i = 0;
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char car_recu;
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char checksum = '0';
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int i;
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char checksum;
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char carac_recu;
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char checksum_trame[3];
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car_recu = uart0_rx();
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while (uart0_rx() != '$');
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i = 0;
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checksum = 0; //'0'
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while ((carac_recu = uart0_rx()) != '*'){
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Buffer[i++] = carac_recu;
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checksum = checksum ^ carac_recu; // ^ est le ou exclusif
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}
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while (car_recu != '$'){
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i = 0;
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checksum = '0';
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checksum_trame[0] = uart0_rx();
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checksum_trame[1] = uart0_rx();
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if (checksum == hex2int(checksum_trame)){
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trame_ok = 1;
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}
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while (car_recu != '*'){
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Buffer[i++] = car_recu;
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checksum = checksum ^ car_recu; // ^ est le ou exclusif
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else{
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trame_ok = 0;
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}
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return i;
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}
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int hex2int(char *c)
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{
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int i=0;
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for(i=0; i<2; i++)
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{
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if(c[i]>='0' && c[i]<='9')
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{
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c[i] = c[i] - '0';
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}
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if(c[i]>='A' && c[i]<='F')
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{
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c[i] = c[i] - 'A' + 10;
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}
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}
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return(c[1]+16*c[0]);
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}
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Formats disponibles : Unified diff
Realisation de la fonction rectrame v1