mbed library sources. Supersedes mbed-src.
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targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/analogin_api.c@15:a81a8d6c1dfe, 2015-11-04 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Nov 04 16:30:11 2015 +0000
- Revision:
- 15:a81a8d6c1dfe
- Child:
- 18:da299f395b9e
Synchronized with git revision 46af745ef4405614c3fa49abbd9a706a362ea514
Full URL: https://github.com/mbedmicro/mbed/commit/46af745ef4405614c3fa49abbd9a706a362ea514/
Renamed TARGET_SAM_CortexM0+ to TARGET_SAM_CortexM0P for compatiblity with online compiler
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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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 | 15:a81a8d6c1dfe | 122 | #else |
mbed_official | 15:a81a8d6c1dfe | 123 | # error ADC pin mappings are not defined for this device. |
mbed_official | 15:a81a8d6c1dfe | 124 | #endif |
mbed_official | 15:a81a8d6c1dfe | 125 | }; |
mbed_official | 15:a81a8d6c1dfe | 126 | |
mbed_official | 15:a81a8d6c1dfe | 127 | uint32_t pin_map_result = PIN_INVALID_ADC_AIN; |
mbed_official | 15:a81a8d6c1dfe | 128 | |
mbed_official | 15:a81a8d6c1dfe | 129 | if (pin <= ADC_EXTCHANNEL_MSB) { |
mbed_official | 15:a81a8d6c1dfe | 130 | pin_map_result = pinmapping[pin >> ADC_INPUTCTRL_MUXPOS_Pos]; |
mbed_official | 15:a81a8d6c1dfe | 131 | |
mbed_official | 15:a81a8d6c1dfe | 132 | Assert(pin_map_result != PIN_INVALID_ADC_AIN); |
mbed_official | 15:a81a8d6c1dfe | 133 | |
mbed_official | 15:a81a8d6c1dfe | 134 | struct system_pinmux_config config; |
mbed_official | 15:a81a8d6c1dfe | 135 | system_pinmux_get_config_defaults(&config); |
mbed_official | 15:a81a8d6c1dfe | 136 | |
mbed_official | 15:a81a8d6c1dfe | 137 | /* Analog functions are all on MUX setting B */ |
mbed_official | 15:a81a8d6c1dfe | 138 | config.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE; |
mbed_official | 15:a81a8d6c1dfe | 139 | config.mux_position = 1; |
mbed_official | 15:a81a8d6c1dfe | 140 | |
mbed_official | 15:a81a8d6c1dfe | 141 | system_pinmux_pin_set_config(pin_map_result, &config); |
mbed_official | 15:a81a8d6c1dfe | 142 | } |
mbed_official | 15:a81a8d6c1dfe | 143 | } |
mbed_official | 15:a81a8d6c1dfe | 144 | |
mbed_official | 15:a81a8d6c1dfe | 145 | void analogin_init(analogin_t *obj, PinName pin) |
mbed_official | 15:a81a8d6c1dfe | 146 | { |
mbed_official | 15:a81a8d6c1dfe | 147 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 148 | if (g_sys_init == 0) { |
mbed_official | 15:a81a8d6c1dfe | 149 | system_init(); |
mbed_official | 15:a81a8d6c1dfe | 150 | g_sys_init = 1; |
mbed_official | 15:a81a8d6c1dfe | 151 | } |
mbed_official | 15:a81a8d6c1dfe | 152 | uint32_t pos_input; |
mbed_official | 15:a81a8d6c1dfe | 153 | static uint8_t init_flag = 0; |
mbed_official | 15:a81a8d6c1dfe | 154 | |
mbed_official | 15:a81a8d6c1dfe | 155 | pos_input = pinmap_find_peripheral(pin, PinMap_ADC); |
mbed_official | 15:a81a8d6c1dfe | 156 | MBED_ASSERT(pos_input != NC); |
mbed_official | 15:a81a8d6c1dfe | 157 | |
mbed_official | 15:a81a8d6c1dfe | 158 | adc_get_config_defaults(&(obj->config_adc)); |
mbed_official | 15:a81a8d6c1dfe | 159 | obj->config_adc.positive_input = pos_input; |
mbed_official | 15:a81a8d6c1dfe | 160 | if (init_flag == 0) { // ADC init and enable to be done only once. |
mbed_official | 15:a81a8d6c1dfe | 161 | adc_init(&adc_instance, ADC, &(obj->config_adc)); |
mbed_official | 15:a81a8d6c1dfe | 162 | adc_enable(&adc_instance); |
mbed_official | 15:a81a8d6c1dfe | 163 | init_flag = 1; |
mbed_official | 15:a81a8d6c1dfe | 164 | } |
mbed_official | 15:a81a8d6c1dfe | 165 | adc_configure_ain_pin(obj->config_adc.positive_input); |
mbed_official | 15:a81a8d6c1dfe | 166 | adc_configure_ain_pin(obj->config_adc.negative_input); |
mbed_official | 15:a81a8d6c1dfe | 167 | } |
mbed_official | 15:a81a8d6c1dfe | 168 | |
mbed_official | 15:a81a8d6c1dfe | 169 | uint16_t analogin_read_u16(analogin_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 170 | { |
mbed_official | 15:a81a8d6c1dfe | 171 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 172 | uint16_t result; |
mbed_official | 15:a81a8d6c1dfe | 173 | adc_set_positive_input(&adc_instance, obj->config_adc.positive_input); |
mbed_official | 15:a81a8d6c1dfe | 174 | adc_set_negative_input(&adc_instance, obj->config_adc.negative_input); |
mbed_official | 15:a81a8d6c1dfe | 175 | adc_start_conversion(&adc_instance); |
mbed_official | 15:a81a8d6c1dfe | 176 | do { |
mbed_official | 15:a81a8d6c1dfe | 177 | } while(adc_read(&(adc_instance), &result) == STATUS_BUSY); // 12 bit value |
mbed_official | 15:a81a8d6c1dfe | 178 | |
mbed_official | 15:a81a8d6c1dfe | 179 | return (uint16_t)(((uint32_t)result * 0xFFFF) / 0x0FFF); // for normalizing to 16 bit value |
mbed_official | 15:a81a8d6c1dfe | 180 | } |
mbed_official | 15:a81a8d6c1dfe | 181 | |
mbed_official | 15:a81a8d6c1dfe | 182 | float analogin_read(analogin_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 183 | { |
mbed_official | 15:a81a8d6c1dfe | 184 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 185 | uint16_t value = analogin_read_u16(obj); |
mbed_official | 15:a81a8d6c1dfe | 186 | return (float)value * (1.0f / (float)0xFFFF); |
mbed_official | 15:a81a8d6c1dfe | 187 | } |
mbed_official | 15:a81a8d6c1dfe | 188 |