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authorJack Humbert <jack.humb@gmail.com>2017-07-10 11:18:47 -0400
committerGitHub <noreply@github.com>2017-07-10 11:18:47 -0400
commit42d5a324eb673b2214a87c8911d850105c3bdaab (patch)
treec14aca23eb74164d5cd7e69f50e6d347b3ace51a /drivers/avr/analog.h
parent8d190d5e25b3374156264fde0ba5d78696cc74aa (diff)
Start mvoing hardware drivers to /drivers/ (#1433)
* start driver isolation * update nyquist and orthodox boards * update atreus62 * move drivers to avr * update avr conditional
Diffstat (limited to 'drivers/avr/analog.h')
-rw-r--r--drivers/avr/analog.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/avr/analog.h b/drivers/avr/analog.h
new file mode 100644
index 0000000000..8d93de7dc2
--- /dev/null
+++ b/drivers/avr/analog.h
@@ -0,0 +1,52 @@
+/* Copyright 2015 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _analog_h_included__
+#define _analog_h_included__
+
+#include <stdint.h>
+
+void analogReference(uint8_t mode);
+int16_t analogRead(uint8_t pin);
+int16_t adc_read(uint8_t mux);
+
+#define ADC_REF_POWER (1<<REFS0)
+#define ADC_REF_INTERNAL ((1<<REFS1) | (1<<REFS0))
+#define ADC_REF_EXTERNAL (0)
+
+// These prescaler values are for high speed mode, ADHSM = 1
+#if F_CPU == 16000000L
+#define ADC_PRESCALER ((1<<ADPS2) | (1<<ADPS1))
+#elif F_CPU == 8000000L
+#define ADC_PRESCALER ((1<<ADPS2) | (1<<ADPS0))
+#elif F_CPU == 4000000L
+#define ADC_PRESCALER ((1<<ADPS2))
+#elif F_CPU == 2000000L
+#define ADC_PRESCALER ((1<<ADPS1) | (1<<ADPS0))
+#elif F_CPU == 1000000L
+#define ADC_PRESCALER ((1<<ADPS1))
+#else
+#define ADC_PRESCALER ((1<<ADPS0))
+#endif
+
+// some avr-libc versions do not properly define ADHSM
+#if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)
+#if !defined(ADHSM)
+#define ADHSM (7)
+#endif
+#endif
+
+#endif