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RTC: Make calls to writeData update the RTCs internal representation of time.

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This commit is contained in:
Gabe Black 2009-08-20 23:09:03 -07:00
parent da3c3bfa98
commit f6bb7ec4eb
1 changed files with 18 additions and 2 deletions
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20
src/dev/mc146818.cc
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@ -52,6 +52,15 @@ bcdize(uint8_t val)
return result;
}
static uint8_t
unbcdize(uint8_t val)
{
uint8_t result;
result = val & 0xf;
result += (val >> 4) * 10;
return result;
}
void
MC146818::setTime(const struct tm time)
{
@ -101,9 +110,16 @@ MC146818::~MC146818()
void
MC146818::writeData(const uint8_t addr, const uint8_t data)
{
if (addr < RTC_STAT_REGA)
if (addr < RTC_STAT_REGA) {
clock_data[addr] = data;
else {
curTime.tm_sec = unbcdize(sec);
curTime.tm_min = unbcdize(min);
curTime.tm_hour = unbcdize(hour);
curTime.tm_mday = unbcdize(mday);
curTime.tm_mon = unbcdize(mon) - 1;
curTime.tm_year = ((unbcdize(year) + 50) % 100) + 1950;
curTime.tm_wday = unbcdize(wday) - 1;
} else {
switch (addr) {
case RTC_STAT_REGA:
// The "update in progress" bit is read only.