From dc2c4be4e9e4f2c1ce7a177ba8c64c36624accdc Mon Sep 17 00:00:00 2001
From: darksv <darek969-12@o2.pl>
Date: Sun, 28 Feb 2016 11:30:16 +0100
Subject: [PATCH] Fix delay in DS18B20 driver
There is a bug in the driver for DS18B20: instead of delaying for 750ms it waits only for 750us, which obviously causes that read temprature is not valid (it's default 85 degrees).
---
extras/ds18b20/ds18b20.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/extras/ds18b20/ds18b20.c b/extras/ds18b20/ds18b20.c
index cb4a1d1..dc028fc 100644
--- a/extras/ds18b20/ds18b20.c
+++ b/extras/ds18b20/ds18b20.c
@@ -1,3 +1,6 @@
+#include "FreeRTOS.h"
+#include "task.h"
+
#include "onewire/onewire.h"
#include "ds18b20.h"
@@ -29,7 +32,9 @@ uint8_t ds18b20_read_all(uint8_t pin, ds_sensor_t *result) {
onewire_reset(pin);
onewire_select(pin, addr);
onewire_write(pin, DS1820_CONVERT_T, ONEWIRE_DEFAULT_POWER);
- sdk_os_delay_us(750);
+
+ vTaskDelay(750 / portTICK_RATE_MS);
+
onewire_reset(pin);
onewire_select(pin, addr);
onewire_write(pin, DS1820_READ_SCRATCHPAD, ONEWIRE_DEFAULT_POWER);
@@ -70,7 +75,7 @@ float ds18b20_read_single(uint8_t pin) {
onewire_write(pin, DS1820_SKIP_ROM, ONEWIRE_DEFAULT_POWER);
onewire_write(pin, DS1820_CONVERT_T, ONEWIRE_DEFAULT_POWER);
- sdk_os_delay_us(750);
+ vTaskDelay(750 / portTICK_RATE_MS);
onewire_reset(pin);
onewire_write(pin, DS1820_SKIP_ROM, ONEWIRE_DEFAULT_POWER);