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targets/TARGET_Atmel/TARGET_SAM_CortexM0P/TARGET_SAMD21G18A/analogout_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 "analogout_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 "dac.h" |
mbed_official | 15:a81a8d6c1dfe | 23 | |
mbed_official | 15:a81a8d6c1dfe | 24 | struct dac_module dac_instance; |
mbed_official | 15:a81a8d6c1dfe | 25 | extern uint8_t g_sys_init; |
mbed_official | 15:a81a8d6c1dfe | 26 | |
mbed_official | 15:a81a8d6c1dfe | 27 | #define MAX_VAL_10BIT 0x03FF |
mbed_official | 15:a81a8d6c1dfe | 28 | |
mbed_official | 15:a81a8d6c1dfe | 29 | void analogout_init(dac_t *obj, PinName pin) |
mbed_official | 15:a81a8d6c1dfe | 30 | { |
mbed_official | 15:a81a8d6c1dfe | 31 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 32 | if (g_sys_init == 0) { |
mbed_official | 15:a81a8d6c1dfe | 33 | system_init(); |
mbed_official | 15:a81a8d6c1dfe | 34 | g_sys_init = 1; |
mbed_official | 15:a81a8d6c1dfe | 35 | } |
mbed_official | 15:a81a8d6c1dfe | 36 | |
mbed_official | 15:a81a8d6c1dfe | 37 | struct dac_config config_dac; |
mbed_official | 15:a81a8d6c1dfe | 38 | struct dac_chan_config config_dac_chan; |
mbed_official | 15:a81a8d6c1dfe | 39 | uint32_t pos_input; |
mbed_official | 15:a81a8d6c1dfe | 40 | pos_input = pinmap_find_peripheral(pin, PinMap_DAC); |
mbed_official | 15:a81a8d6c1dfe | 41 | MBED_ASSERT(pos_input != NC); |
mbed_official | 15:a81a8d6c1dfe | 42 | |
mbed_official | 15:a81a8d6c1dfe | 43 | obj->dac = DAC_0; |
mbed_official | 15:a81a8d6c1dfe | 44 | |
mbed_official | 15:a81a8d6c1dfe | 45 | dac_get_config_defaults(&config_dac); |
mbed_official | 15:a81a8d6c1dfe | 46 | dac_init(&dac_instance, (Dac *)DAC_0, &config_dac); |
mbed_official | 15:a81a8d6c1dfe | 47 | |
mbed_official | 15:a81a8d6c1dfe | 48 | dac_chan_get_config_defaults(&config_dac_chan); |
mbed_official | 15:a81a8d6c1dfe | 49 | dac_chan_set_config(&dac_instance, DAC_CHANNEL_0, &config_dac_chan); |
mbed_official | 15:a81a8d6c1dfe | 50 | dac_chan_enable(&dac_instance, DAC_CHANNEL_0); |
mbed_official | 15:a81a8d6c1dfe | 51 | |
mbed_official | 15:a81a8d6c1dfe | 52 | dac_enable(&dac_instance); |
mbed_official | 15:a81a8d6c1dfe | 53 | } |
mbed_official | 15:a81a8d6c1dfe | 54 | |
mbed_official | 15:a81a8d6c1dfe | 55 | void analogout_free(dac_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 56 | { |
mbed_official | 15:a81a8d6c1dfe | 57 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 58 | struct system_pinmux_config pin_conf; |
mbed_official | 15:a81a8d6c1dfe | 59 | |
mbed_official | 15:a81a8d6c1dfe | 60 | dac_disable(&dac_instance); |
mbed_official | 15:a81a8d6c1dfe | 61 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; |
mbed_official | 15:a81a8d6c1dfe | 62 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_UP; |
mbed_official | 15:a81a8d6c1dfe | 63 | pin_conf.powersave = false; |
mbed_official | 15:a81a8d6c1dfe | 64 | pin_conf.mux_position = SYSTEM_PINMUX_GPIO; |
mbed_official | 15:a81a8d6c1dfe | 65 | system_pinmux_pin_set_config(PA02, &pin_conf); /*PA02 is the only DAC pin available*/ |
mbed_official | 15:a81a8d6c1dfe | 66 | } |
mbed_official | 15:a81a8d6c1dfe | 67 | |
mbed_official | 15:a81a8d6c1dfe | 68 | void analogout_write(dac_t *obj, float value) |
mbed_official | 15:a81a8d6c1dfe | 69 | { |
mbed_official | 15:a81a8d6c1dfe | 70 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 71 | uint16_t count_val = 0; |
mbed_official | 15:a81a8d6c1dfe | 72 | if (value < 0.0f) { |
mbed_official | 15:a81a8d6c1dfe | 73 | count_val = 0; |
mbed_official | 15:a81a8d6c1dfe | 74 | } else if (value > 1.0f) { |
mbed_official | 15:a81a8d6c1dfe | 75 | count_val = MAX_VAL_10BIT; |
mbed_official | 15:a81a8d6c1dfe | 76 | } else { |
mbed_official | 15:a81a8d6c1dfe | 77 | count_val = (uint16_t)(value * (float)MAX_VAL_10BIT); |
mbed_official | 15:a81a8d6c1dfe | 78 | } |
mbed_official | 15:a81a8d6c1dfe | 79 | dac_chan_write(&dac_instance, DAC_CHANNEL_0, count_val); |
mbed_official | 15:a81a8d6c1dfe | 80 | |
mbed_official | 15:a81a8d6c1dfe | 81 | } |
mbed_official | 15:a81a8d6c1dfe | 82 | |
mbed_official | 15:a81a8d6c1dfe | 83 | void analogout_write_u16(dac_t *obj, uint16_t value) |
mbed_official | 15:a81a8d6c1dfe | 84 | { |
mbed_official | 15:a81a8d6c1dfe | 85 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 86 | uint16_t count_val; |
mbed_official | 15:a81a8d6c1dfe | 87 | count_val = (uint16_t)((value * (float)MAX_VAL_10BIT) / 0xFFFF); /*Normalization to the value 0xFFFF*/ |
mbed_official | 15:a81a8d6c1dfe | 88 | dac_chan_write(&dac_instance, DAC_CHANNEL_0, count_val); |
mbed_official | 15:a81a8d6c1dfe | 89 | |
mbed_official | 15:a81a8d6c1dfe | 90 | } |
mbed_official | 15:a81a8d6c1dfe | 91 | |
mbed_official | 15:a81a8d6c1dfe | 92 | static uint32_t data_reg_read(dac_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 93 | { |
mbed_official | 15:a81a8d6c1dfe | 94 | Dac *const dac_module = (Dac *)obj->dac; |
mbed_official | 15:a81a8d6c1dfe | 95 | return (uint32_t)dac_module->DATA.reg; |
mbed_official | 15:a81a8d6c1dfe | 96 | } |
mbed_official | 15:a81a8d6c1dfe | 97 | |
mbed_official | 15:a81a8d6c1dfe | 98 | float analogout_read(dac_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 99 | { |
mbed_official | 15:a81a8d6c1dfe | 100 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 101 | uint32_t data_val = data_reg_read(obj); |
mbed_official | 15:a81a8d6c1dfe | 102 | return data_val/(float)MAX_VAL_10BIT; |
mbed_official | 15:a81a8d6c1dfe | 103 | } |
mbed_official | 15:a81a8d6c1dfe | 104 | |
mbed_official | 15:a81a8d6c1dfe | 105 | uint16_t analogout_read_u16(dac_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 106 | { |
mbed_official | 15:a81a8d6c1dfe | 107 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 108 | uint32_t data_val = data_reg_read(obj); |
mbed_official | 15:a81a8d6c1dfe | 109 | return (uint16_t)((data_val / (float)MAX_VAL_10BIT) * 0xFFFF); /*Normalization to the value 0xFFFF*/ |
mbed_official | 15:a81a8d6c1dfe | 110 | } |