mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_STM32F4XX/analogin_api.c@268:402bcc0c870b, 2014-07-29 (annotated)

Committer:
mbed_official
Date:
Tue Jul 29 19:00:07 2014 +0100
Revision:
268:402bcc0c870b
Parent:
251:de9a1e4ffd79
Child:
285:31249416b6f9
Synchronized with git revision 490d1a6606b3138f165c5edf2f2370ca616587c0



Full URL: https://github.com/mbedmicro/mbed/commit/490d1a6606b3138f165c5edf2f2370ca616587c0/



[LPC1114] Sleep fix + some device.h settings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 20:4263a77256ae 1 /* mbed Microcontroller Library
bogdanm 20:4263a77256ae 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 20:4263a77256ae 3 *
bogdanm 20:4263a77256ae 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 20:4263a77256ae 5 * you may not use this file except in compliance with the License.
bogdanm 20:4263a77256ae 6 * You may obtain a copy of the License at
bogdanm 20:4263a77256ae 7 *
bogdanm 20:4263a77256ae 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 20:4263a77256ae 9 *
bogdanm 20:4263a77256ae 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 20:4263a77256ae 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 20:4263a77256ae 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 20:4263a77256ae 13 * See the License for the specific language governing permissions and
bogdanm 20:4263a77256ae 14 * limitations under the License.
bogdanm 20:4263a77256ae 15 */
mbed_official 227:7bd0639b8911 16 #include "mbed_assert.h"
bogdanm 20:4263a77256ae 17 #include "analogin_api.h"
bogdanm 20:4263a77256ae 18
bogdanm 20:4263a77256ae 19 #if DEVICE_ANALOGIN
bogdanm 20:4263a77256ae 20
bogdanm 20:4263a77256ae 21 #include "cmsis.h"
bogdanm 20:4263a77256ae 22 #include "pinmap.h"
mbed_official 251:de9a1e4ffd79 23 #include "error.h"
bogdanm 20:4263a77256ae 24
bogdanm 20:4263a77256ae 25 #define ADC_10BIT_RANGE 0x3FF
bogdanm 20:4263a77256ae 26 #define ADC_12BIT_RANGE 0xFFF
bogdanm 20:4263a77256ae 27
bogdanm 20:4263a77256ae 28 static const PinMap PinMap_ADC[] = {
bogdanm 20:4263a77256ae 29 {PA_0, ADC0_0, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 30 {PA_1, ADC0_1, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 31 {PA_2, ADC0_2, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 32 {PA_3, ADC0_3, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 33 {PA_4, ADC0_4, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 34 {PA_5, ADC0_5, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 35 {PA_6, ADC0_6, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 36 {PA_7, ADC0_7, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 37 {PB_0, ADC0_8, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 38 {PB_1, ADC0_9, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 39 {PC_0, ADC0_10, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 40 {PC_1, ADC0_11, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 41 {PC_2, ADC0_12, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 42 {PC_3, ADC0_13, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 43 {PC_4, ADC0_14, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 44 {PC_5, ADC0_15, STM_PIN_DATA(3, 0)},
bogdanm 20:4263a77256ae 45 {NC, NC, 0}
bogdanm 20:4263a77256ae 46 };
bogdanm 20:4263a77256ae 47
bogdanm 20:4263a77256ae 48 # define ADC_RANGE ADC_12BIT_RANGE
bogdanm 20:4263a77256ae 49
bogdanm 20:4263a77256ae 50 void analogin_init(analogin_t *obj, PinName pin) {
bogdanm 20:4263a77256ae 51 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 227:7bd0639b8911 52 MBED_ASSERT(obj->adc != (uint32_t)NC);
bogdanm 20:4263a77256ae 53
bogdanm 20:4263a77256ae 54 // ensure power is turned on
bogdanm 20:4263a77256ae 55 RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN | RCC_AHB1ENR_GPIOBEN |
bogdanm 20:4263a77256ae 56 RCC_AHB1ENR_GPIOCEN;
bogdanm 20:4263a77256ae 57 RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
bogdanm 20:4263a77256ae 58
bogdanm 20:4263a77256ae 59 // Enable the ADC
bogdanm 20:4263a77256ae 60 ADC1->CR2 |= ADC_CR2_ADON;
bogdanm 20:4263a77256ae 61
bogdanm 20:4263a77256ae 62 pinmap_pinout(pin, PinMap_ADC);
bogdanm 20:4263a77256ae 63 }
bogdanm 20:4263a77256ae 64
bogdanm 20:4263a77256ae 65 static inline uint32_t adc_read(analogin_t *obj) {
bogdanm 20:4263a77256ae 66 // Select the appropriate channel
bogdanm 20:4263a77256ae 67 ADC1->SQR3 = (int) obj->adc;
bogdanm 20:4263a77256ae 68
bogdanm 20:4263a77256ae 69 // Start conversion
bogdanm 20:4263a77256ae 70 ADC1->CR2 |= ADC_CR2_SWSTART;
bogdanm 20:4263a77256ae 71
bogdanm 20:4263a77256ae 72 // Wait for conversion to finish
bogdanm 20:4263a77256ae 73 while (!(ADC1->SR & ADC_SR_EOC));
bogdanm 20:4263a77256ae 74
bogdanm 20:4263a77256ae 75 uint32_t data = ADC1->DR;
bogdanm 20:4263a77256ae 76 return data; // 12 bit
bogdanm 20:4263a77256ae 77 }
bogdanm 20:4263a77256ae 78
bogdanm 20:4263a77256ae 79 static inline uint32_t adc_read_u32(analogin_t *obj) {
bogdanm 20:4263a77256ae 80 uint32_t value;
bogdanm 20:4263a77256ae 81 value = adc_read(obj);
bogdanm 20:4263a77256ae 82 return value;
bogdanm 20:4263a77256ae 83 }
bogdanm 20:4263a77256ae 84
bogdanm 20:4263a77256ae 85 uint16_t analogin_read_u16(analogin_t *obj) {
bogdanm 20:4263a77256ae 86 uint32_t value = adc_read_u32(obj);
bogdanm 20:4263a77256ae 87
bogdanm 20:4263a77256ae 88 return (value << 4) | ((value >> 8) & 0x000F); // 12 bit
bogdanm 20:4263a77256ae 89 }
bogdanm 20:4263a77256ae 90
bogdanm 20:4263a77256ae 91 float analogin_read(analogin_t *obj) {
bogdanm 20:4263a77256ae 92 uint32_t value = adc_read_u32(obj);
bogdanm 20:4263a77256ae 93 return (float)value * (1.0f / (float)ADC_RANGE);
bogdanm 20:4263a77256ae 94 }
bogdanm 20:4263a77256ae 95
bogdanm 20:4263a77256ae 96 #endif