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Ajout de la RTC #26

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Ajout de la RTC #26

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3908593
WIP RTC
rdmsr Apr 16, 2021
191ddf0
Ajout de commentaires, images et ressources
rdmsr Apr 16, 2021
004808b
Markdown fix
rdmsr Apr 16, 2021
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Update RTC.md
rdmsr Apr 28, 2021
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16 changes: 12 additions & 4 deletions src/x86_64/périphériques/RTC.md
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Expand Up @@ -13,19 +13,27 @@ Elle peut être utilisée pour avoir la date et heure précise. (voir ACPI pour
# Lire le temps
Il est possible de lire depuis la RTC en utilisant les fonctions suivantes:
```c

enum
{
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@Supercip971 Supercip971 Apr 28, 2021

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in the documentation, put a markdown table instead of a C code enum, it's better for reading

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@Supercip971 Supercip971 Apr 28, 2021

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and add other register, like STATUS_REGISTER_B, week, day, hour, ... in the table (maybe ?)

CMOS_ADDRESS = 0x70,
CMOS_DATA = 0x71,
STATUS_REGISTER_A = 0x0A
};

/* Vérifier si la RTC est en train de se mettre à jour */
int rtc_is_updating()
{
outb(0x70, 0x0A);
return inb(0x71) & 0x80;
outb(CMOS_ADDRESS, STATUS_REGISTER_A);
return inb(CMOS_DATA) & 0x80;
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@Supercip971 Supercip971 Apr 28, 2021

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maybe add a signification of the last bit ?

}

unsigned char rtc_read(int reg)
{
while (rtc_is_updating()); /* Attendre que l'update finisse */
outb(0x70, reg);
outb(CMOS_ADDRESS, reg);

return inb(0x71);
return inb(CMOS_DATA);
}
```
Voici la table des éléments à lire depuis la RTC et leur registre CMOS
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