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targets/hal/TARGET_Atmel/TARGET_SAM21/analogin_api.c@592:a274ee790e56, 2015-07-17 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Jul 17 09:15:10 2015 +0100
- Revision:
- 592:a274ee790e56
Synchronized with git revision e7144f83a8d75df80c4877936b6ffe552b0be9e6
Full URL: https://github.com/mbedmicro/mbed/commit/e7144f83a8d75df80c4877936b6ffe552b0be9e6/
More API implementation for SAMR21
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 592:a274ee790e56 | 1 | /* mbed Microcontroller Library |
mbed_official | 592:a274ee790e56 | 2 | * Copyright (c) 2006-2013 ARM Limited |
mbed_official | 592:a274ee790e56 | 3 | * |
mbed_official | 592:a274ee790e56 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 592:a274ee790e56 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 592:a274ee790e56 | 6 | * You may obtain a copy of the License at |
mbed_official | 592:a274ee790e56 | 7 | * |
mbed_official | 592:a274ee790e56 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 592:a274ee790e56 | 9 | * |
mbed_official | 592:a274ee790e56 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 592:a274ee790e56 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 592:a274ee790e56 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 592:a274ee790e56 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 592:a274ee790e56 | 14 | * limitations under the License. |
mbed_official | 592:a274ee790e56 | 15 | */ |
mbed_official | 592:a274ee790e56 | 16 | #include "mbed_assert.h" |
mbed_official | 592:a274ee790e56 | 17 | #include "analogin_api.h" |
mbed_official | 592:a274ee790e56 | 18 | |
mbed_official | 592:a274ee790e56 | 19 | #include "cmsis.h" |
mbed_official | 592:a274ee790e56 | 20 | #include "pinmap.h" |
mbed_official | 592:a274ee790e56 | 21 | #include "PeripheralPins.h" |
mbed_official | 592:a274ee790e56 | 22 | #include "adc.h" |
mbed_official | 592:a274ee790e56 | 23 | #include "status_codes.h" |
mbed_official | 592:a274ee790e56 | 24 | |
mbed_official | 592:a274ee790e56 | 25 | struct adc_module adc_instance; |
mbed_official | 592:a274ee790e56 | 26 | |
mbed_official | 592:a274ee790e56 | 27 | void adc_configure_ain_pin(uint32_t pin) |
mbed_official | 592:a274ee790e56 | 28 | { |
mbed_official | 592:a274ee790e56 | 29 | #define PIN_INVALID_ADC_AIN 0xFFFFUL |
mbed_official | 592:a274ee790e56 | 30 | |
mbed_official | 592:a274ee790e56 | 31 | /* Pinmapping table for AINxx -> GPIO pin number */ |
mbed_official | 592:a274ee790e56 | 32 | const uint32_t pinmapping[] = { |
mbed_official | 592:a274ee790e56 | 33 | #if (SAMD20E | SAMD21E) |
mbed_official | 592:a274ee790e56 | 34 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 592:a274ee790e56 | 35 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 36 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 592:a274ee790e56 | 37 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 592:a274ee790e56 | 38 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 39 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 40 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 41 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 42 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 592:a274ee790e56 | 43 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 592:a274ee790e56 | 44 | #elif (SAMD20G | SAMD21G) |
mbed_official | 592:a274ee790e56 | 45 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 592:a274ee790e56 | 46 | PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3, |
mbed_official | 592:a274ee790e56 | 47 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 592:a274ee790e56 | 48 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 592:a274ee790e56 | 49 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 50 | PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11, |
mbed_official | 592:a274ee790e56 | 51 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 52 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 53 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 592:a274ee790e56 | 54 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 592:a274ee790e56 | 55 | #elif (SAMD20J | SAMD21J) |
mbed_official | 592:a274ee790e56 | 56 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 592:a274ee790e56 | 57 | PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3, |
mbed_official | 592:a274ee790e56 | 58 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 592:a274ee790e56 | 59 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 592:a274ee790e56 | 60 | PIN_PB00B_ADC_AIN8, PIN_PB01B_ADC_AIN9, |
mbed_official | 592:a274ee790e56 | 61 | PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11, |
mbed_official | 592:a274ee790e56 | 62 | PIN_PB04B_ADC_AIN12, PIN_PB05B_ADC_AIN13, |
mbed_official | 592:a274ee790e56 | 63 | PIN_PB06B_ADC_AIN14, PIN_PB07B_ADC_AIN15, |
mbed_official | 592:a274ee790e56 | 64 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 592:a274ee790e56 | 65 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 592:a274ee790e56 | 66 | #elif SAMR21E |
mbed_official | 592:a274ee790e56 | 67 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 68 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 69 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 70 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 592:a274ee790e56 | 71 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 72 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 73 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 74 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 75 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 592:a274ee790e56 | 76 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 77 | #elif SAMR21G |
mbed_official | 592:a274ee790e56 | 78 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 79 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 80 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 592:a274ee790e56 | 81 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 592:a274ee790e56 | 82 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 83 | PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11, |
mbed_official | 592:a274ee790e56 | 84 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 85 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 86 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 592:a274ee790e56 | 87 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 88 | #elif (SAMD10C | SAMD11C) |
mbed_official | 592:a274ee790e56 | 89 | PIN_PA02B_ADC_AIN0, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 90 | PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3, |
mbed_official | 592:a274ee790e56 | 91 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 92 | PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7, |
mbed_official | 592:a274ee790e56 | 93 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 94 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 95 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 96 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 97 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 98 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 99 | #elif (SAMD10DS | SAMD11DS) |
mbed_official | 592:a274ee790e56 | 100 | PIN_PA02B_ADC_AIN0, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 101 | PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3, |
mbed_official | 592:a274ee790e56 | 102 | PIN_PA06B_ADC_AIN4, PIN_PA07B_ADC_AIN5, |
mbed_official | 592:a274ee790e56 | 103 | PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7, |
mbed_official | 592:a274ee790e56 | 104 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 105 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 106 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 107 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 108 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 109 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 110 | #elif (SAMD10DM | SAMD11DM) |
mbed_official | 592:a274ee790e56 | 111 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 592:a274ee790e56 | 112 | PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3, |
mbed_official | 592:a274ee790e56 | 113 | PIN_PA06B_ADC_AIN4, PIN_PA07B_ADC_AIN5, |
mbed_official | 592:a274ee790e56 | 114 | PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7, |
mbed_official | 592:a274ee790e56 | 115 | PIN_PA10B_ADC_AIN8, PIN_PA11B_ADC_AIN9, |
mbed_official | 592:a274ee790e56 | 116 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 117 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 118 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 119 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 120 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 592:a274ee790e56 | 121 | #else |
mbed_official | 592:a274ee790e56 | 122 | # error ADC pin mappings are not defined for this device. |
mbed_official | 592:a274ee790e56 | 123 | #endif |
mbed_official | 592:a274ee790e56 | 124 | }; |
mbed_official | 592:a274ee790e56 | 125 | |
mbed_official | 592:a274ee790e56 | 126 | uint32_t pin_map_result = PIN_INVALID_ADC_AIN; |
mbed_official | 592:a274ee790e56 | 127 | |
mbed_official | 592:a274ee790e56 | 128 | if (pin <= ADC_EXTCHANNEL_MSB) { |
mbed_official | 592:a274ee790e56 | 129 | pin_map_result = pinmapping[pin >> ADC_INPUTCTRL_MUXPOS_Pos]; |
mbed_official | 592:a274ee790e56 | 130 | |
mbed_official | 592:a274ee790e56 | 131 | Assert(pin_map_result != PIN_INVALID_ADC_AIN); |
mbed_official | 592:a274ee790e56 | 132 | |
mbed_official | 592:a274ee790e56 | 133 | struct system_pinmux_config config; |
mbed_official | 592:a274ee790e56 | 134 | system_pinmux_get_config_defaults(&config); |
mbed_official | 592:a274ee790e56 | 135 | |
mbed_official | 592:a274ee790e56 | 136 | /* Analog functions are all on MUX setting B */ |
mbed_official | 592:a274ee790e56 | 137 | config.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE; |
mbed_official | 592:a274ee790e56 | 138 | config.mux_position = 1; |
mbed_official | 592:a274ee790e56 | 139 | |
mbed_official | 592:a274ee790e56 | 140 | system_pinmux_pin_set_config(pin_map_result, &config); |
mbed_official | 592:a274ee790e56 | 141 | } |
mbed_official | 592:a274ee790e56 | 142 | } |
mbed_official | 592:a274ee790e56 | 143 | |
mbed_official | 592:a274ee790e56 | 144 | void analogin_init(analogin_t *obj, PinName pin) |
mbed_official | 592:a274ee790e56 | 145 | { |
mbed_official | 592:a274ee790e56 | 146 | uint32_t pos_input; |
mbed_official | 592:a274ee790e56 | 147 | static uint8_t init_flag = 0; |
mbed_official | 592:a274ee790e56 | 148 | |
mbed_official | 592:a274ee790e56 | 149 | pos_input = pinmap_find_peripheral(pin, PinMap_ADC); |
mbed_official | 592:a274ee790e56 | 150 | MBED_ASSERT(pos_input != NC); |
mbed_official | 592:a274ee790e56 | 151 | |
mbed_official | 592:a274ee790e56 | 152 | adc_get_config_defaults(&(obj->config_adc)); |
mbed_official | 592:a274ee790e56 | 153 | obj->config_adc.positive_input = pos_input; |
mbed_official | 592:a274ee790e56 | 154 | if (init_flag == 0) { // ADC init and enable to be done only once. |
mbed_official | 592:a274ee790e56 | 155 | adc_init(&adc_instance, ADC, &(obj->config_adc)); |
mbed_official | 592:a274ee790e56 | 156 | adc_enable(&adc_instance); |
mbed_official | 592:a274ee790e56 | 157 | init_flag = 1; |
mbed_official | 592:a274ee790e56 | 158 | } else { // pin muxing |
mbed_official | 592:a274ee790e56 | 159 | adc_configure_ain_pin(obj->config_adc.positive_input); |
mbed_official | 592:a274ee790e56 | 160 | adc_configure_ain_pin(obj->config_adc.negative_input); |
mbed_official | 592:a274ee790e56 | 161 | } |
mbed_official | 592:a274ee790e56 | 162 | } |
mbed_official | 592:a274ee790e56 | 163 | |
mbed_official | 592:a274ee790e56 | 164 | uint16_t analogin_read_u16(analogin_t *obj) |
mbed_official | 592:a274ee790e56 | 165 | { |
mbed_official | 592:a274ee790e56 | 166 | uint16_t result; |
mbed_official | 592:a274ee790e56 | 167 | adc_set_positive_input(&adc_instance, obj->config_adc.positive_input); |
mbed_official | 592:a274ee790e56 | 168 | adc_set_negative_input(&adc_instance, obj->config_adc.negative_input); |
mbed_official | 592:a274ee790e56 | 169 | adc_start_conversion(&adc_instance); |
mbed_official | 592:a274ee790e56 | 170 | do { |
mbed_official | 592:a274ee790e56 | 171 | } while(adc_read(&(adc_instance), &result) == STATUS_BUSY); // 12 bit value |
mbed_official | 592:a274ee790e56 | 172 | |
mbed_official | 592:a274ee790e56 | 173 | return (uint16_t)((result * 65535) / 4095); // for normalizing to 16 bit value |
mbed_official | 592:a274ee790e56 | 174 | } |
mbed_official | 592:a274ee790e56 | 175 | |
mbed_official | 592:a274ee790e56 | 176 | float analogin_read(analogin_t *obj) |
mbed_official | 592:a274ee790e56 | 177 | { |
mbed_official | 592:a274ee790e56 | 178 | uint16_t value = analogin_read_u16(obj); |
mbed_official | 592:a274ee790e56 | 179 | return (float)value * (1.0f / (float)0xFFFF); |
mbed_official | 592:a274ee790e56 | 180 | } |
mbed_official | 592:a274ee790e56 | 181 |