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
- Committer:
- mbed_official
- Date:
- 2014-09-11
- Revision:
- 320:be04b2b1e3f2
- Parent:
- targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_K64F/analogin_api.c@ 267:8673334f2cbe
File content as of revision 320:be04b2b1e3f2:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed_assert.h" #include "analogin_api.h" #if DEVICE_ANALOGIN #include "cmsis.h" #include "pinmap.h" #include "PeripheralNames.h" #include "fsl_adc_hal.h" #include "fsl_clock_manager.h" #include "PeripheralPins.h" #define MAX_FADC 6000000 void analogin_init(analogin_t *obj, PinName pin) { obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); MBED_ASSERT(obj->adc != (ADCName)NC); uint32_t instance = obj->adc >> ADC_INSTANCE_SHIFT; clock_manager_set_gate(kClockModuleADC, instance, true); uint32_t bus_clock; clock_manager_get_frequency(kBusClock, &bus_clock); uint32_t clkdiv; for (clkdiv = 0; clkdiv < 4; clkdiv++) { if ((bus_clock >> clkdiv) <= MAX_FADC) break; } if (clkdiv == 4) { clkdiv = 0x7; //Set max div } /* adc is enabled/triggered when reading. */ adc_hal_set_clock_source_mode(instance, (adc_clock_source_mode_t)(clkdiv >> 2)); adc_hal_set_clock_divider_mode(instance, (adc_clock_divider_mode_t)(clkdiv & 0x3)); adc_hal_set_reference_voltage_mode(instance, kAdcVoltageVref); adc_hal_set_resolution_mode(instance, kAdcSingleDiff16); adc_hal_configure_continuous_conversion(instance, false); adc_hal_configure_hw_trigger(instance, false); /* sw trigger */ adc_hal_configure_hw_average(instance, true); adc_hal_set_hw_average_mode(instance, kAdcHwAverageCount4); adc_hal_set_group_mux(instance, kAdcChannelMuxB); /* only B channels are avail */ pinmap_pinout(pin, PinMap_ADC); } uint16_t analogin_read_u16(analogin_t *obj) { uint32_t instance = obj->adc >> ADC_INSTANCE_SHIFT; /* sw trigger (SC1A) */ adc_hal_enable(instance, 0, (adc_channel_mode_t)(obj->adc & 0xF), false); while (!adc_hal_is_conversion_completed(instance, 0)); return adc_hal_get_conversion_value(instance, 0); } float analogin_read(analogin_t *obj) { uint16_t value = analogin_read_u16(obj); return (float)value * (1.0f / (float)0xFFFF); } #endif