mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_MCU_K64F/analogin_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)
- Committer:
- shaoziyang
- Date:
- Sat Sep 13 14:25:46 2014 +0000
- Revision:
- 323:9e901b0a5aa1
- Parent:
- 320:be04b2b1e3f2
test with CLOCK_SETUP = 0
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 146:f64d43ff0c18 | 1 | /* mbed Microcontroller Library |
mbed_official | 146:f64d43ff0c18 | 2 | * Copyright (c) 2006-2013 ARM Limited |
mbed_official | 146:f64d43ff0c18 | 3 | * |
mbed_official | 146:f64d43ff0c18 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 146:f64d43ff0c18 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 146:f64d43ff0c18 | 6 | * You may obtain a copy of the License at |
mbed_official | 146:f64d43ff0c18 | 7 | * |
mbed_official | 146:f64d43ff0c18 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 146:f64d43ff0c18 | 9 | * |
mbed_official | 146:f64d43ff0c18 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 146:f64d43ff0c18 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 146:f64d43ff0c18 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 146:f64d43ff0c18 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 146:f64d43ff0c18 | 14 | * limitations under the License. |
mbed_official | 146:f64d43ff0c18 | 15 | */ |
mbed_official | 227:7bd0639b8911 | 16 | #include "mbed_assert.h" |
mbed_official | 146:f64d43ff0c18 | 17 | #include "analogin_api.h" |
mbed_official | 146:f64d43ff0c18 | 18 | |
mbed_official | 267:8673334f2cbe | 19 | #if DEVICE_ANALOGIN |
mbed_official | 267:8673334f2cbe | 20 | |
mbed_official | 146:f64d43ff0c18 | 21 | #include "cmsis.h" |
mbed_official | 146:f64d43ff0c18 | 22 | #include "pinmap.h" |
mbed_official | 146:f64d43ff0c18 | 23 | #include "PeripheralNames.h" |
mbed_official | 146:f64d43ff0c18 | 24 | #include "fsl_adc_hal.h" |
mbed_official | 146:f64d43ff0c18 | 25 | #include "fsl_clock_manager.h" |
mbed_official | 265:9632ea190e16 | 26 | #include "PeripheralPins.h" |
mbed_official | 146:f64d43ff0c18 | 27 | |
mbed_official | 146:f64d43ff0c18 | 28 | #define MAX_FADC 6000000 |
mbed_official | 146:f64d43ff0c18 | 29 | |
mbed_official | 146:f64d43ff0c18 | 30 | void analogin_init(analogin_t *obj, PinName pin) { |
mbed_official | 146:f64d43ff0c18 | 31 | obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); |
mbed_official | 227:7bd0639b8911 | 32 | MBED_ASSERT(obj->adc != (ADCName)NC); |
mbed_official | 227:7bd0639b8911 | 33 | |
mbed_official | 146:f64d43ff0c18 | 34 | uint32_t instance = obj->adc >> ADC_INSTANCE_SHIFT; |
mbed_official | 146:f64d43ff0c18 | 35 | |
mbed_official | 146:f64d43ff0c18 | 36 | clock_manager_set_gate(kClockModuleADC, instance, true); |
mbed_official | 146:f64d43ff0c18 | 37 | |
mbed_official | 146:f64d43ff0c18 | 38 | uint32_t bus_clock; |
mbed_official | 146:f64d43ff0c18 | 39 | clock_manager_get_frequency(kBusClock, &bus_clock); |
mbed_official | 146:f64d43ff0c18 | 40 | uint32_t clkdiv; |
mbed_official | 146:f64d43ff0c18 | 41 | for (clkdiv = 0; clkdiv < 4; clkdiv++) { |
mbed_official | 146:f64d43ff0c18 | 42 | if ((bus_clock >> clkdiv) <= MAX_FADC) |
mbed_official | 146:f64d43ff0c18 | 43 | break; |
mbed_official | 146:f64d43ff0c18 | 44 | } |
mbed_official | 151:7a600087bf72 | 45 | if (clkdiv == 4) { |
mbed_official | 151:7a600087bf72 | 46 | clkdiv = 0x7; //Set max div |
mbed_official | 146:f64d43ff0c18 | 47 | } |
mbed_official | 151:7a600087bf72 | 48 | /* adc is enabled/triggered when reading. */ |
mbed_official | 146:f64d43ff0c18 | 49 | adc_hal_set_clock_source_mode(instance, (adc_clock_source_mode_t)(clkdiv >> 2)); |
mbed_official | 146:f64d43ff0c18 | 50 | adc_hal_set_clock_divider_mode(instance, (adc_clock_divider_mode_t)(clkdiv & 0x3)); |
mbed_official | 146:f64d43ff0c18 | 51 | adc_hal_set_reference_voltage_mode(instance, kAdcVoltageVref); |
mbed_official | 146:f64d43ff0c18 | 52 | adc_hal_set_resolution_mode(instance, kAdcSingleDiff16); |
mbed_official | 146:f64d43ff0c18 | 53 | adc_hal_configure_continuous_conversion(instance, false); |
mbed_official | 151:7a600087bf72 | 54 | adc_hal_configure_hw_trigger(instance, false); /* sw trigger */ |
mbed_official | 151:7a600087bf72 | 55 | adc_hal_configure_hw_average(instance, true); |
mbed_official | 151:7a600087bf72 | 56 | adc_hal_set_hw_average_mode(instance, kAdcHwAverageCount4); |
mbed_official | 151:7a600087bf72 | 57 | adc_hal_set_group_mux(instance, kAdcChannelMuxB); /* only B channels are avail */ |
mbed_official | 146:f64d43ff0c18 | 58 | |
mbed_official | 151:7a600087bf72 | 59 | pinmap_pinout(pin, PinMap_ADC); |
mbed_official | 146:f64d43ff0c18 | 60 | } |
mbed_official | 146:f64d43ff0c18 | 61 | |
mbed_official | 146:f64d43ff0c18 | 62 | uint16_t analogin_read_u16(analogin_t *obj) { |
mbed_official | 146:f64d43ff0c18 | 63 | uint32_t instance = obj->adc >> ADC_INSTANCE_SHIFT; |
mbed_official | 151:7a600087bf72 | 64 | /* sw trigger (SC1A) */ |
mbed_official | 151:7a600087bf72 | 65 | adc_hal_enable(instance, 0, (adc_channel_mode_t)(obj->adc & 0xF), false); |
mbed_official | 151:7a600087bf72 | 66 | while (!adc_hal_is_conversion_completed(instance, 0)); |
mbed_official | 151:7a600087bf72 | 67 | return adc_hal_get_conversion_value(instance, 0); |
mbed_official | 146:f64d43ff0c18 | 68 | } |
mbed_official | 146:f64d43ff0c18 | 69 | |
mbed_official | 146:f64d43ff0c18 | 70 | float analogin_read(analogin_t *obj) { |
mbed_official | 146:f64d43ff0c18 | 71 | uint16_t value = analogin_read_u16(obj); |
mbed_official | 146:f64d43ff0c18 | 72 | return (float)value * (1.0f / (float)0xFFFF); |
mbed_official | 146:f64d43ff0c18 | 73 | } |
mbed_official | 146:f64d43ff0c18 | 74 | |
mbed_official | 267:8673334f2cbe | 75 | #endif |