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1-Wire power fix, by Thomas Shaddack.

This commit is contained in:
Johny Mattsson 2015-08-20 11:09:12 +10:00
parent 77297662fd
commit 346251dca6
1 changed files with 8 additions and 5 deletions
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13
app/driver/onewire.c
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@ -64,6 +64,9 @@ sample code bearing this copyright.
#define interrupts os_intr_unlock
#define delayMicroseconds os_delay_us
// 1 for keeping the parasitic power on H
#define owDefaultPower 1
#if ONEWIRE_SEARCH
// global search state
static unsigned char ROM_NO[NUM_OW][8];
@ -185,7 +188,7 @@ void onewire_write(uint8_t pin, uint8_t v, uint8_t power /* = 0 */) {
void onewire_write_bytes(uint8_t pin, const uint8_t *buf, uint16_t count, bool power /* = 0 */) {
uint16_t i;
for (i = 0 ; i < count ; i++)
onewire_write(pin, buf[i], 0);
onewire_write(pin, buf[i], owDefaultPower);
if (!power) {
noInterrupts();
DIRECT_MODE_INPUT(pin);
@ -220,9 +223,9 @@ void onewire_select(uint8_t pin, const uint8_t rom[8])
{
uint8_t i;
onewire_write(pin, 0x55, 0); // Choose ROM
onewire_write(pin, 0x55, owDefaultPower); // Choose ROM
for (i = 0; i < 8; i++) onewire_write(pin, rom[i], 0);
for (i = 0; i < 8; i++) onewire_write(pin, rom[i], owDefaultPower);
}
//
@ -230,7 +233,7 @@ void onewire_select(uint8_t pin, const uint8_t rom[8])
//
void onewire_skip(uint8_t pin)
{
onewire_write(pin, 0xCC, 0); // Skip ROM
onewire_write(pin, 0xCC, owDefaultPower); // Skip ROM
}
void onewire_depower(uint8_t pin)
@ -319,7 +322,7 @@ uint8_t onewire_search(uint8_t pin, uint8_t *newAddr)
}
// issue the search command
onewire_write(pin, 0xF0, 0);
onewire_write(pin, 0xF0, owDefaultPower);
// loop to do the search
do