Cortney Padua / mbed-dev

fixed drive strength

Dependents:   capstone_i2c

Fork of mbed-dev by mbed official

targets/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF51822_UNIFIED/analogin_api.c@150:02e0a0aed4ec, 2016-11-08 (annotated)

Committer:
<>
Date:
Tue Nov 08 17:45:16 2016 +0000
Revision:
150:02e0a0aed4ec
Parent:
149:156823d33999 
This updates the lib to the mbed lib v129

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 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 17 #include "analogin_api.h"
<> 144:ef7eb2e8f9f7 18 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 19 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 20 #include "nrf_drv_adc.h"
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 #ifdef DEVICE_ANALOGIN
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 #define ADC_10BIT_RANGE 0x3FF
<> 144:ef7eb2e8f9f7 26 #define ADC_RANGE ADC_10BIT_RANGE
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 static const PinMap PinMap_ADC[] = {
<> 144:ef7eb2e8f9f7 29 {p1, ADC0_0, 4},
<> 144:ef7eb2e8f9f7 30 {p2, ADC0_0, 8},
<> 144:ef7eb2e8f9f7 31 {p3, ADC0_0, 16},
<> 144:ef7eb2e8f9f7 32 {p4, ADC0_0, 32},
<> 144:ef7eb2e8f9f7 33 {p5, ADC0_0, 64},
<> 144:ef7eb2e8f9f7 34 {p6, ADC0_0, 128},
<> 144:ef7eb2e8f9f7 35 #ifndef TARGET_NRF51_DONGLE
<> 144:ef7eb2e8f9f7 36 {p26, ADC0_0, 1},
<> 144:ef7eb2e8f9f7 37 {p27, ADC0_0, 2},
<> 144:ef7eb2e8f9f7 38 #endif
<> 144:ef7eb2e8f9f7 39 {NC, NC, 0}
<> 144:ef7eb2e8f9f7 40 };
<> 144:ef7eb2e8f9f7 41
<> 150:02e0a0aed4ec 42 void ADC_IRQHandler(void); // export IRQ handler from nrf_drv_adc.c
<> 144:ef7eb2e8f9f7 43
<> 144:ef7eb2e8f9f7 44 void analogin_init(analogin_t *obj, PinName pin)
<> 144:ef7eb2e8f9f7 45 {
<> 144:ef7eb2e8f9f7 46 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
<> 144:ef7eb2e8f9f7 47 MBED_ASSERT(obj->adc != (ADCName)NC);
<> 144:ef7eb2e8f9f7 48
<> 144:ef7eb2e8f9f7 49 uint32_t pinFunc = pinmap_function(pin, PinMap_ADC);
<> 144:ef7eb2e8f9f7 50 MBED_ASSERT(pinFunc != (uint32_t)NC);
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 obj->adc_pin = pinFunc;
<> 144:ef7eb2e8f9f7 53
<> 150:02e0a0aed4ec 54 NVIC_SetVector(ADC_IRQn, (uint32_t)ADC_IRQHandler);
<> 150:02e0a0aed4ec 55
<> 144:ef7eb2e8f9f7 56 ret_code_t ret_code;
<> 144:ef7eb2e8f9f7 57 // p_config, event_handler
<> 144:ef7eb2e8f9f7 58 ret_code = nrf_drv_adc_init(NULL , NULL); // select blocking mode
<> 144:ef7eb2e8f9f7 59 MBED_ASSERT((ret_code == NRF_SUCCESS) || (ret_code == NRF_ERROR_INVALID_STATE)); //NRF_ERROR_INVALID_STATE expected for multiple channels used.
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 uint16_t analogin_read_u16(analogin_t *obj)
<> 144:ef7eb2e8f9f7 63 {
<> 144:ef7eb2e8f9f7 64 nrf_adc_value_t adc_value;
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 nrf_drv_adc_channel_t adc_channel;
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 // initialization by assigment because IAR dosen't support variable initializer in declaration statement.
<> 144:ef7eb2e8f9f7 69 adc_channel.config.config.resolution = NRF_ADC_CONFIG_RES_10BIT;
<> 144:ef7eb2e8f9f7 70 adc_channel.config.config.input = NRF_ADC_CONFIG_SCALING_INPUT_FULL_SCALE;
<> 144:ef7eb2e8f9f7 71 adc_channel.config.config.reference = NRF_ADC_CONFIG_REF_VBG;
<> 144:ef7eb2e8f9f7 72 adc_channel.config.config.ain = (obj->adc_pin);
<> 144:ef7eb2e8f9f7 73 adc_channel.p_next = NULL;
<> 144:ef7eb2e8f9f7 74
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 ret_code_t ret_code;
<> 144:ef7eb2e8f9f7 77
<> 144:ef7eb2e8f9f7 78 ret_code = nrf_drv_adc_sample_convert( &adc_channel, &adc_value);
<> 144:ef7eb2e8f9f7 79 MBED_ASSERT(ret_code == NRF_SUCCESS);
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 return adc_value;
<> 144:ef7eb2e8f9f7 82 }
<> 144:ef7eb2e8f9f7 83
<> 144:ef7eb2e8f9f7 84 float analogin_read(analogin_t *obj)
<> 144:ef7eb2e8f9f7 85 {
<> 144:ef7eb2e8f9f7 86 uint16_t value = analogin_read_u16(obj);
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 return (float)value * (1.0f / (float)ADC_RANGE);
<> 144:ef7eb2e8f9f7 89 }
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 #endif // DEVICE_ANALOGIN