Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

hal/analogout_api.h@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #ifndef MBED_ANALOGOUT_API_H
<> 144:ef7eb2e8f9f7 17 #define MBED_ANALOGOUT_API_H
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #include "device.h"
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #if DEVICE_ANALOGOUT
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 24 extern "C" {
<> 144:ef7eb2e8f9f7 25 #endif
<> 144:ef7eb2e8f9f7 26
<> 144:ef7eb2e8f9f7 27 /** Analogout hal structure. dac_s is declared in the target's hal
<> 144:ef7eb2e8f9f7 28 */
<> 144:ef7eb2e8f9f7 29 typedef struct dac_s dac_t;
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 /**
<> 144:ef7eb2e8f9f7 32 * \defgroup hal_analogout Analogout hal functions
<> 144:ef7eb2e8f9f7 33 * @{
<> 144:ef7eb2e8f9f7 34 */
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 /** Initialize the analogout peripheral
<> 144:ef7eb2e8f9f7 37 *
<> 144:ef7eb2e8f9f7 38 * Configures the pin used by analogout.
<> 144:ef7eb2e8f9f7 39 * @param obj The analogout object to initialize
<> 144:ef7eb2e8f9f7 40 * @param pin The analogout pin name
<> 144:ef7eb2e8f9f7 41 */
<> 144:ef7eb2e8f9f7 42 void analogout_init(dac_t *obj, PinName pin);
<> 144:ef7eb2e8f9f7 43
<> 144:ef7eb2e8f9f7 44 /** Release the analogout object
<> 144:ef7eb2e8f9f7 45 *
<> 144:ef7eb2e8f9f7 46 * Note: This is not currently used in the mbed-drivers
<> 144:ef7eb2e8f9f7 47 * @param obj The analogout object
<> 144:ef7eb2e8f9f7 48 */
<> 144:ef7eb2e8f9f7 49 void analogout_free(dac_t *obj);
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 /** Set the output voltage, specified as a percentage (float)
<> 144:ef7eb2e8f9f7 52 *
<> 144:ef7eb2e8f9f7 53 * @param obj The analogin object
<> 144:ef7eb2e8f9f7 54 * @param value The floating-point output voltage to be set
<> 144:ef7eb2e8f9f7 55 */
<> 144:ef7eb2e8f9f7 56 void analogout_write(dac_t *obj, float value);
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 /** Set the output voltage, specified as unsigned 16-bit
<> 144:ef7eb2e8f9f7 59 *
<> 144:ef7eb2e8f9f7 60 * @param obj The analogin object
<> 144:ef7eb2e8f9f7 61 * @param value The unsigned 16-bit output voltage to be set
<> 144:ef7eb2e8f9f7 62 */
<> 144:ef7eb2e8f9f7 63 void analogout_write_u16(dac_t *obj, uint16_t value);
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 /** Read the current voltage value on the pin
<> 144:ef7eb2e8f9f7 66 *
<> 144:ef7eb2e8f9f7 67 * @param obj The analogin object
<> 144:ef7eb2e8f9f7 68 * @return A floating-point value representing the current voltage on the pin,
<> 144:ef7eb2e8f9f7 69 * measured as a percentage
<> 144:ef7eb2e8f9f7 70 */
<> 144:ef7eb2e8f9f7 71 float analogout_read(dac_t *obj);
<> 144:ef7eb2e8f9f7 72
<> 144:ef7eb2e8f9f7 73 /** Read the current voltage value on the pin, as a normalized unsigned 16bit value
<> 144:ef7eb2e8f9f7 74 *
<> 144:ef7eb2e8f9f7 75 * @param obj The analogin object
<> 144:ef7eb2e8f9f7 76 * @return An unsigned 16-bit value representing the current voltage on the pin
<> 144:ef7eb2e8f9f7 77 */
<> 144:ef7eb2e8f9f7 78 uint16_t analogout_read_u16(dac_t *obj);
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80 /**@}*/
<> 144:ef7eb2e8f9f7 81
<> 144:ef7eb2e8f9f7 82 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 83 }
<> 144:ef7eb2e8f9f7 84 #endif
<> 144:ef7eb2e8f9f7 85
<> 144:ef7eb2e8f9f7 86 #endif
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 #endif