mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_NXP/TARGET_LPC15XX/analogout_api.c@117:e0a7df0a9a56, 2014-03-12 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Mar 12 10:30:07 2014 +0000
- Revision:
- 117:e0a7df0a9a56
- Child:
- 227:7bd0639b8911
Synchronized with git revision 6b2f3120cfef5765bc1bade48c495873f627f9bc
Full URL: https://github.com/mbedmicro/mbed/commit/6b2f3120cfef5765bc1bade48c495873f627f9bc/
[LPC1549] Added AnalogOut API and PWM improvement
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 117:e0a7df0a9a56 | 1 | /* mbed Microcontroller Library |
mbed_official | 117:e0a7df0a9a56 | 2 | * Copyright (c) 2006-2013 ARM Limited |
mbed_official | 117:e0a7df0a9a56 | 3 | * |
mbed_official | 117:e0a7df0a9a56 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 117:e0a7df0a9a56 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 117:e0a7df0a9a56 | 6 | * You may obtain a copy of the License at |
mbed_official | 117:e0a7df0a9a56 | 7 | * |
mbed_official | 117:e0a7df0a9a56 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 117:e0a7df0a9a56 | 9 | * |
mbed_official | 117:e0a7df0a9a56 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 117:e0a7df0a9a56 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 117:e0a7df0a9a56 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 117:e0a7df0a9a56 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 117:e0a7df0a9a56 | 14 | * limitations under the License. |
mbed_official | 117:e0a7df0a9a56 | 15 | */ |
mbed_official | 117:e0a7df0a9a56 | 16 | #include "analogout_api.h" |
mbed_official | 117:e0a7df0a9a56 | 17 | #include "cmsis.h" |
mbed_official | 117:e0a7df0a9a56 | 18 | #include "pinmap.h" |
mbed_official | 117:e0a7df0a9a56 | 19 | #include "error.h" |
mbed_official | 117:e0a7df0a9a56 | 20 | |
mbed_official | 117:e0a7df0a9a56 | 21 | void analogout_init(dac_t *obj, PinName pin) { |
mbed_official | 117:e0a7df0a9a56 | 22 | if (pin != P0_12) { |
mbed_official | 117:e0a7df0a9a56 | 23 | error("DAC pin mapping failed"); |
mbed_official | 117:e0a7df0a9a56 | 24 | } |
mbed_official | 117:e0a7df0a9a56 | 25 | |
mbed_official | 117:e0a7df0a9a56 | 26 | LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 29); |
mbed_official | 117:e0a7df0a9a56 | 27 | LPC_SYSCON->PDRUNCFG &= ~(1 << 12); |
mbed_official | 117:e0a7df0a9a56 | 28 | LPC_IOCON->PIO0_12 = 0; |
mbed_official | 117:e0a7df0a9a56 | 29 | LPC_SWM->PINENABLE0 &= ~(1 << 24); |
mbed_official | 117:e0a7df0a9a56 | 30 | LPC_DAC->CTRL = 0; |
mbed_official | 117:e0a7df0a9a56 | 31 | |
mbed_official | 117:e0a7df0a9a56 | 32 | analogout_write_u16(obj, 0); |
mbed_official | 117:e0a7df0a9a56 | 33 | } |
mbed_official | 117:e0a7df0a9a56 | 34 | |
mbed_official | 117:e0a7df0a9a56 | 35 | void analogout_free(dac_t *obj) |
mbed_official | 117:e0a7df0a9a56 | 36 | { |
mbed_official | 117:e0a7df0a9a56 | 37 | LPC_SYSCON->SYSAHBCLKCTRL0 &= ~(1 << 29); |
mbed_official | 117:e0a7df0a9a56 | 38 | LPC_SWM->PINENABLE0 |= (1 << 24); |
mbed_official | 117:e0a7df0a9a56 | 39 | } |
mbed_official | 117:e0a7df0a9a56 | 40 | |
mbed_official | 117:e0a7df0a9a56 | 41 | static inline void dac_write(int value) { |
mbed_official | 117:e0a7df0a9a56 | 42 | value &= 0xFFF; // 12-bit |
mbed_official | 117:e0a7df0a9a56 | 43 | |
mbed_official | 117:e0a7df0a9a56 | 44 | // Set the DAC output |
mbed_official | 117:e0a7df0a9a56 | 45 | LPC_DAC->VAL = (value << 4); |
mbed_official | 117:e0a7df0a9a56 | 46 | } |
mbed_official | 117:e0a7df0a9a56 | 47 | |
mbed_official | 117:e0a7df0a9a56 | 48 | static inline int dac_read() { |
mbed_official | 117:e0a7df0a9a56 | 49 | return ((LPC_DAC->VAL >> 4) & 0xFFF); |
mbed_official | 117:e0a7df0a9a56 | 50 | } |
mbed_official | 117:e0a7df0a9a56 | 51 | |
mbed_official | 117:e0a7df0a9a56 | 52 | void analogout_write(dac_t *obj, float value) { |
mbed_official | 117:e0a7df0a9a56 | 53 | if (value < 0.0f) { |
mbed_official | 117:e0a7df0a9a56 | 54 | dac_write(0); |
mbed_official | 117:e0a7df0a9a56 | 55 | } else if (value > 1.0f) { |
mbed_official | 117:e0a7df0a9a56 | 56 | dac_write(0xFFF); |
mbed_official | 117:e0a7df0a9a56 | 57 | } else { |
mbed_official | 117:e0a7df0a9a56 | 58 | dac_write((uint32_t)(value * (float)0xFFF)); |
mbed_official | 117:e0a7df0a9a56 | 59 | } |
mbed_official | 117:e0a7df0a9a56 | 60 | } |
mbed_official | 117:e0a7df0a9a56 | 61 | |
mbed_official | 117:e0a7df0a9a56 | 62 | void analogout_write_u16(dac_t *obj, uint16_t value) { |
mbed_official | 117:e0a7df0a9a56 | 63 | dac_write(value); |
mbed_official | 117:e0a7df0a9a56 | 64 | } |
mbed_official | 117:e0a7df0a9a56 | 65 | |
mbed_official | 117:e0a7df0a9a56 | 66 | float analogout_read(dac_t *obj) { |
mbed_official | 117:e0a7df0a9a56 | 67 | uint32_t value = dac_read(); |
mbed_official | 117:e0a7df0a9a56 | 68 | return (float)value * (1.0f / (float)0xFFF); |
mbed_official | 117:e0a7df0a9a56 | 69 | } |
mbed_official | 117:e0a7df0a9a56 | 70 | |
mbed_official | 117:e0a7df0a9a56 | 71 | uint16_t analogout_read_u16(dac_t *obj) { |
mbed_official | 117:e0a7df0a9a56 | 72 | return (uint16_t)dac_read(); |
mbed_official | 117:e0a7df0a9a56 | 73 | } |