mbed library sources. Supersedes mbed-src.
Fork of mbed-dev by
targets/TARGET_Atmel/TARGET_SAM_CortexM0P/analogin_api.c@153:9398a535854b, 2016-12-22 (annotated)
- Committer:
- fwndz
- Date:
- Thu Dec 22 05:12:40 2016 +0000
- Revision:
- 153:9398a535854b
- Parent:
- 149:156823d33999
device target maximize
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 15:a81a8d6c1dfe | 1 | /* mbed Microcontroller Library |
mbed_official | 15:a81a8d6c1dfe | 2 | * Copyright (c) 2006-2015 ARM Limited |
mbed_official | 15:a81a8d6c1dfe | 3 | * |
mbed_official | 15:a81a8d6c1dfe | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 15:a81a8d6c1dfe | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 15:a81a8d6c1dfe | 6 | * You may obtain a copy of the License at |
mbed_official | 15:a81a8d6c1dfe | 7 | * |
mbed_official | 15:a81a8d6c1dfe | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 15:a81a8d6c1dfe | 9 | * |
mbed_official | 15:a81a8d6c1dfe | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 15:a81a8d6c1dfe | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 15:a81a8d6c1dfe | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 15:a81a8d6c1dfe | 13 | * See the License for the specific language governing permissions and |
mbed_official | 15:a81a8d6c1dfe | 14 | * limitations under the License. |
mbed_official | 15:a81a8d6c1dfe | 15 | */ |
mbed_official | 15:a81a8d6c1dfe | 16 | #include "mbed_assert.h" |
mbed_official | 15:a81a8d6c1dfe | 17 | #include "analogin_api.h" |
mbed_official | 15:a81a8d6c1dfe | 18 | |
mbed_official | 15:a81a8d6c1dfe | 19 | #include "cmsis.h" |
mbed_official | 15:a81a8d6c1dfe | 20 | #include "pinmap.h" |
mbed_official | 15:a81a8d6c1dfe | 21 | #include "PeripheralPins.h" |
mbed_official | 15:a81a8d6c1dfe | 22 | #include "adc.h" |
mbed_official | 15:a81a8d6c1dfe | 23 | #include "status_codes.h" |
mbed_official | 15:a81a8d6c1dfe | 24 | |
mbed_official | 15:a81a8d6c1dfe | 25 | extern uint8_t g_sys_init; |
mbed_official | 15:a81a8d6c1dfe | 26 | struct adc_module adc_instance; |
mbed_official | 15:a81a8d6c1dfe | 27 | |
mbed_official | 15:a81a8d6c1dfe | 28 | void adc_configure_ain_pin(uint32_t pin) |
mbed_official | 15:a81a8d6c1dfe | 29 | { |
mbed_official | 15:a81a8d6c1dfe | 30 | #define PIN_INVALID_ADC_AIN 0xFFFFUL |
mbed_official | 15:a81a8d6c1dfe | 31 | |
mbed_official | 15:a81a8d6c1dfe | 32 | /* Pinmapping table for AINxx -> GPIO pin number */ |
mbed_official | 15:a81a8d6c1dfe | 33 | const uint32_t pinmapping[] = { |
mbed_official | 15:a81a8d6c1dfe | 34 | #if (SAMD20E | SAMD21E) |
mbed_official | 15:a81a8d6c1dfe | 35 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 15:a81a8d6c1dfe | 36 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 37 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 15:a81a8d6c1dfe | 38 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 15:a81a8d6c1dfe | 39 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 40 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 41 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 42 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 43 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 15:a81a8d6c1dfe | 44 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 15:a81a8d6c1dfe | 45 | #elif (SAMD20G | SAMD21G) |
mbed_official | 15:a81a8d6c1dfe | 46 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 15:a81a8d6c1dfe | 47 | PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3, |
mbed_official | 15:a81a8d6c1dfe | 48 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 15:a81a8d6c1dfe | 49 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 15:a81a8d6c1dfe | 50 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 51 | PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11, |
mbed_official | 15:a81a8d6c1dfe | 52 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 53 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 54 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 15:a81a8d6c1dfe | 55 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 15:a81a8d6c1dfe | 56 | #elif (SAMD20J | SAMD21J) |
mbed_official | 15:a81a8d6c1dfe | 57 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 15:a81a8d6c1dfe | 58 | PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3, |
mbed_official | 15:a81a8d6c1dfe | 59 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 15:a81a8d6c1dfe | 60 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 15:a81a8d6c1dfe | 61 | PIN_PB00B_ADC_AIN8, PIN_PB01B_ADC_AIN9, |
mbed_official | 15:a81a8d6c1dfe | 62 | PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11, |
mbed_official | 15:a81a8d6c1dfe | 63 | PIN_PB04B_ADC_AIN12, PIN_PB05B_ADC_AIN13, |
mbed_official | 15:a81a8d6c1dfe | 64 | PIN_PB06B_ADC_AIN14, PIN_PB07B_ADC_AIN15, |
mbed_official | 15:a81a8d6c1dfe | 65 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 15:a81a8d6c1dfe | 66 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 15:a81a8d6c1dfe | 67 | #elif SAMR21E |
mbed_official | 15:a81a8d6c1dfe | 68 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 69 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 70 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 71 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 15:a81a8d6c1dfe | 72 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 73 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 74 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 75 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 76 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 15:a81a8d6c1dfe | 77 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 78 | #elif SAMR21G |
mbed_official | 15:a81a8d6c1dfe | 79 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 80 | PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3, |
mbed_official | 15:a81a8d6c1dfe | 81 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 15:a81a8d6c1dfe | 82 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 15:a81a8d6c1dfe | 83 | PIN_PB00B_ADC_AIN8, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 84 | PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11, |
mbed_official | 15:a81a8d6c1dfe | 85 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 86 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 87 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 15:a81a8d6c1dfe | 88 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 15:a81a8d6c1dfe | 89 | #elif (SAMD10C | SAMD11C) |
mbed_official | 15:a81a8d6c1dfe | 90 | PIN_PA02B_ADC_AIN0, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 91 | PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3, |
mbed_official | 15:a81a8d6c1dfe | 92 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 93 | PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7, |
mbed_official | 15:a81a8d6c1dfe | 94 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 95 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 96 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 97 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 98 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 99 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 100 | #elif (SAMD10DS | SAMD11DS) |
mbed_official | 15:a81a8d6c1dfe | 101 | PIN_PA02B_ADC_AIN0, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 102 | PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3, |
mbed_official | 15:a81a8d6c1dfe | 103 | PIN_PA06B_ADC_AIN4, PIN_PA07B_ADC_AIN5, |
mbed_official | 15:a81a8d6c1dfe | 104 | PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7, |
mbed_official | 15:a81a8d6c1dfe | 105 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 106 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 107 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 108 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 109 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 110 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 111 | #elif (SAMD10DM | SAMD11DM) |
mbed_official | 15:a81a8d6c1dfe | 112 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 15:a81a8d6c1dfe | 113 | PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3, |
mbed_official | 15:a81a8d6c1dfe | 114 | PIN_PA06B_ADC_AIN4, PIN_PA07B_ADC_AIN5, |
mbed_official | 15:a81a8d6c1dfe | 115 | PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7, |
mbed_official | 15:a81a8d6c1dfe | 116 | PIN_PA10B_ADC_AIN8, PIN_PA11B_ADC_AIN9, |
mbed_official | 15:a81a8d6c1dfe | 117 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 118 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 119 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 120 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 121 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 122 | #elif (SAML21E) |
mbed_official | 18:da299f395b9e | 123 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 18:da299f395b9e | 124 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 125 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 18:da299f395b9e | 126 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 18:da299f395b9e | 127 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 128 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 129 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 130 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 131 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 18:da299f395b9e | 132 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 18:da299f395b9e | 133 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 134 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 135 | #elif (SAML21G) |
mbed_official | 18:da299f395b9e | 136 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 18:da299f395b9e | 137 | PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3, |
mbed_official | 18:da299f395b9e | 138 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 18:da299f395b9e | 139 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 18:da299f395b9e | 140 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 141 | PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11, |
mbed_official | 18:da299f395b9e | 142 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 143 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 144 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 18:da299f395b9e | 145 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 18:da299f395b9e | 146 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 147 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 148 | #elif (SAML21J) |
mbed_official | 18:da299f395b9e | 149 | PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1, |
mbed_official | 18:da299f395b9e | 150 | PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3, |
mbed_official | 18:da299f395b9e | 151 | PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5, |
mbed_official | 18:da299f395b9e | 152 | PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7, |
mbed_official | 18:da299f395b9e | 153 | PIN_PB00B_ADC_AIN8, PIN_PB01B_ADC_AIN9, |
mbed_official | 18:da299f395b9e | 154 | PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11, |
mbed_official | 18:da299f395b9e | 155 | PIN_PB04B_ADC_AIN12, PIN_PB05B_ADC_AIN13, |
mbed_official | 18:da299f395b9e | 156 | PIN_PB06B_ADC_AIN14, PIN_PB07B_ADC_AIN15, |
mbed_official | 18:da299f395b9e | 157 | PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17, |
mbed_official | 18:da299f395b9e | 158 | PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19, |
mbed_official | 18:da299f395b9e | 159 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 18:da299f395b9e | 160 | PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN, |
mbed_official | 15:a81a8d6c1dfe | 161 | #else |
mbed_official | 15:a81a8d6c1dfe | 162 | # error ADC pin mappings are not defined for this device. |
mbed_official | 15:a81a8d6c1dfe | 163 | #endif |
mbed_official | 15:a81a8d6c1dfe | 164 | }; |
mbed_official | 15:a81a8d6c1dfe | 165 | |
mbed_official | 15:a81a8d6c1dfe | 166 | uint32_t pin_map_result = PIN_INVALID_ADC_AIN; |
mbed_official | 15:a81a8d6c1dfe | 167 | |
mbed_official | 15:a81a8d6c1dfe | 168 | if (pin <= ADC_EXTCHANNEL_MSB) { |
mbed_official | 15:a81a8d6c1dfe | 169 | pin_map_result = pinmapping[pin >> ADC_INPUTCTRL_MUXPOS_Pos]; |
mbed_official | 15:a81a8d6c1dfe | 170 | |
mbed_official | 15:a81a8d6c1dfe | 171 | Assert(pin_map_result != PIN_INVALID_ADC_AIN); |
mbed_official | 15:a81a8d6c1dfe | 172 | |
mbed_official | 15:a81a8d6c1dfe | 173 | struct system_pinmux_config config; |
mbed_official | 15:a81a8d6c1dfe | 174 | system_pinmux_get_config_defaults(&config); |
mbed_official | 15:a81a8d6c1dfe | 175 | |
mbed_official | 15:a81a8d6c1dfe | 176 | /* Analog functions are all on MUX setting B */ |
mbed_official | 15:a81a8d6c1dfe | 177 | config.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE; |
mbed_official | 15:a81a8d6c1dfe | 178 | config.mux_position = 1; |
mbed_official | 15:a81a8d6c1dfe | 179 | |
mbed_official | 15:a81a8d6c1dfe | 180 | system_pinmux_pin_set_config(pin_map_result, &config); |
mbed_official | 15:a81a8d6c1dfe | 181 | } |
mbed_official | 15:a81a8d6c1dfe | 182 | } |
mbed_official | 15:a81a8d6c1dfe | 183 | |
mbed_official | 15:a81a8d6c1dfe | 184 | void analogin_init(analogin_t *obj, PinName pin) |
mbed_official | 15:a81a8d6c1dfe | 185 | { |
mbed_official | 15:a81a8d6c1dfe | 186 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 187 | if (g_sys_init == 0) { |
mbed_official | 15:a81a8d6c1dfe | 188 | system_init(); |
mbed_official | 15:a81a8d6c1dfe | 189 | g_sys_init = 1; |
mbed_official | 15:a81a8d6c1dfe | 190 | } |
mbed_official | 15:a81a8d6c1dfe | 191 | uint32_t pos_input; |
mbed_official | 15:a81a8d6c1dfe | 192 | static uint8_t init_flag = 0; |
mbed_official | 15:a81a8d6c1dfe | 193 | |
mbed_official | 15:a81a8d6c1dfe | 194 | pos_input = pinmap_find_peripheral(pin, PinMap_ADC); |
mbed_official | 64:41a834223ea3 | 195 | MBED_ASSERT(pos_input != (uint32_t)NC); |
mbed_official | 15:a81a8d6c1dfe | 196 | |
mbed_official | 15:a81a8d6c1dfe | 197 | adc_get_config_defaults(&(obj->config_adc)); |
mbed_official | 64:41a834223ea3 | 198 | obj->config_adc.positive_input = (enum adc_positive_input)pos_input; |
mbed_official | 15:a81a8d6c1dfe | 199 | if (init_flag == 0) { // ADC init and enable to be done only once. |
mbed_official | 15:a81a8d6c1dfe | 200 | adc_init(&adc_instance, ADC, &(obj->config_adc)); |
mbed_official | 15:a81a8d6c1dfe | 201 | adc_enable(&adc_instance); |
mbed_official | 15:a81a8d6c1dfe | 202 | init_flag = 1; |
mbed_official | 15:a81a8d6c1dfe | 203 | } |
mbed_official | 15:a81a8d6c1dfe | 204 | adc_configure_ain_pin(obj->config_adc.positive_input); |
mbed_official | 15:a81a8d6c1dfe | 205 | adc_configure_ain_pin(obj->config_adc.negative_input); |
mbed_official | 15:a81a8d6c1dfe | 206 | } |
mbed_official | 15:a81a8d6c1dfe | 207 | |
mbed_official | 15:a81a8d6c1dfe | 208 | uint16_t analogin_read_u16(analogin_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 209 | { |
mbed_official | 15:a81a8d6c1dfe | 210 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 211 | uint16_t result; |
mbed_official | 15:a81a8d6c1dfe | 212 | adc_set_positive_input(&adc_instance, obj->config_adc.positive_input); |
mbed_official | 15:a81a8d6c1dfe | 213 | adc_set_negative_input(&adc_instance, obj->config_adc.negative_input); |
mbed_official | 15:a81a8d6c1dfe | 214 | adc_start_conversion(&adc_instance); |
mbed_official | 15:a81a8d6c1dfe | 215 | do { |
mbed_official | 15:a81a8d6c1dfe | 216 | } while(adc_read(&(adc_instance), &result) == STATUS_BUSY); // 12 bit value |
mbed_official | 15:a81a8d6c1dfe | 217 | |
mbed_official | 15:a81a8d6c1dfe | 218 | return (uint16_t)(((uint32_t)result * 0xFFFF) / 0x0FFF); // for normalizing to 16 bit value |
mbed_official | 15:a81a8d6c1dfe | 219 | } |
mbed_official | 15:a81a8d6c1dfe | 220 | |
mbed_official | 15:a81a8d6c1dfe | 221 | float analogin_read(analogin_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 222 | { |
mbed_official | 15:a81a8d6c1dfe | 223 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 224 | uint16_t value = analogin_read_u16(obj); |
mbed_official | 15:a81a8d6c1dfe | 225 | return (float)value * (1.0f / (float)0xFFFF); |
mbed_official | 15:a81a8d6c1dfe | 226 | } |
mbed_official | 15:a81a8d6c1dfe | 227 |