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Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/analogin_api.c@621:9c82b0f79f3d, 2015-09-11 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Sep 11 09:30:09 2015 +0100
- Revision:
- 621:9c82b0f79f3d
- Parent:
- 324:406fd2029f23
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538
Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/
ignore target files not supported by the yotta module
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 324:406fd2029f23 | 1 | /* mbed Microcontroller Library |
| mbed_official | 324:406fd2029f23 | 2 | * Copyright (c) 2006-2013 ARM Limited |
| mbed_official | 324:406fd2029f23 | 3 | * |
| mbed_official | 324:406fd2029f23 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| mbed_official | 324:406fd2029f23 | 5 | * you may not use this file except in compliance with the License. |
| mbed_official | 324:406fd2029f23 | 6 | * You may obtain a copy of the License at |
| mbed_official | 324:406fd2029f23 | 7 | * |
| mbed_official | 324:406fd2029f23 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| mbed_official | 324:406fd2029f23 | 9 | * |
| mbed_official | 324:406fd2029f23 | 10 | * Unless required by applicable law or agreed to in writing, software |
| mbed_official | 324:406fd2029f23 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| mbed_official | 324:406fd2029f23 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| mbed_official | 324:406fd2029f23 | 13 | * See the License for the specific language governing permissions and |
| mbed_official | 324:406fd2029f23 | 14 | * limitations under the License. |
| mbed_official | 324:406fd2029f23 | 15 | */ |
| mbed_official | 324:406fd2029f23 | 16 | #include "mbed_assert.h" |
| mbed_official | 324:406fd2029f23 | 17 | #include "analogin_api.h" |
| mbed_official | 324:406fd2029f23 | 18 | |
| mbed_official | 324:406fd2029f23 | 19 | #if DEVICE_ANALOGIN |
| mbed_official | 324:406fd2029f23 | 20 | |
| mbed_official | 324:406fd2029f23 | 21 | #include "cmsis.h" |
| mbed_official | 324:406fd2029f23 | 22 | #include "pinmap.h" |
| mbed_official | 324:406fd2029f23 | 23 | #include "PeripheralNames.h" |
| mbed_official | 324:406fd2029f23 | 24 | #include "fsl_adc_hal.h" |
| mbed_official | 324:406fd2029f23 | 25 | #include "fsl_clock_manager.h" |
| mbed_official | 324:406fd2029f23 | 26 | #include "PeripheralPins.h" |
| mbed_official | 324:406fd2029f23 | 27 | #include "fsl_device_registers.h" |
| mbed_official | 324:406fd2029f23 | 28 | |
| mbed_official | 324:406fd2029f23 | 29 | #define MAX_FADC 6000000 |
| mbed_official | 324:406fd2029f23 | 30 | |
| mbed_official | 324:406fd2029f23 | 31 | void analogin_init(analogin_t *obj, PinName pin) { |
| mbed_official | 324:406fd2029f23 | 32 | obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); |
| mbed_official | 324:406fd2029f23 | 33 | MBED_ASSERT(obj->adc != (ADCName)NC); |
| mbed_official | 324:406fd2029f23 | 34 | |
| mbed_official | 324:406fd2029f23 | 35 | uint32_t instance = obj->adc >> ADC_INSTANCE_SHIFT; |
| mbed_official | 324:406fd2029f23 | 36 | uint32_t adc_addrs[] = ADC_BASE_ADDRS; |
| mbed_official | 324:406fd2029f23 | 37 | |
| mbed_official | 324:406fd2029f23 | 38 | CLOCK_SYS_EnableAdcClock(instance); |
| mbed_official | 324:406fd2029f23 | 39 | |
| mbed_official | 324:406fd2029f23 | 40 | uint32_t bus_clock; |
| mbed_official | 324:406fd2029f23 | 41 | CLOCK_SYS_GetFreq(kBusClock, &bus_clock); |
| mbed_official | 324:406fd2029f23 | 42 | uint32_t clkdiv; |
| mbed_official | 324:406fd2029f23 | 43 | for (clkdiv = 0; clkdiv < 4; clkdiv++) { |
| mbed_official | 324:406fd2029f23 | 44 | if ((bus_clock >> clkdiv) <= MAX_FADC) |
| mbed_official | 324:406fd2029f23 | 45 | break; |
| mbed_official | 324:406fd2029f23 | 46 | } |
| mbed_official | 324:406fd2029f23 | 47 | if (clkdiv == 4) { |
| mbed_official | 324:406fd2029f23 | 48 | clkdiv = 0x3; //Set max div |
| mbed_official | 324:406fd2029f23 | 49 | } |
| mbed_official | 324:406fd2029f23 | 50 | /* adc is enabled/triggered when reading. */ |
| mbed_official | 324:406fd2029f23 | 51 | ADC_HAL_Init(adc_addrs[instance]); |
| mbed_official | 324:406fd2029f23 | 52 | ADC_HAL_SetClkSrcMode(adc_addrs[instance], kAdcClkSrcOfBusClk); |
| mbed_official | 324:406fd2029f23 | 53 | ADC_HAL_SetClkDividerMode(adc_addrs[instance], (adc_clk_divider_mode_t)(clkdiv & 0x3)); |
| mbed_official | 324:406fd2029f23 | 54 | ADC_HAL_SetRefVoltSrcMode(adc_addrs[instance], kAdcRefVoltSrcOfVref); |
| mbed_official | 324:406fd2029f23 | 55 | ADC_HAL_SetResolutionMode(adc_addrs[instance], kAdcResolutionBitOfSingleEndAs16); |
| mbed_official | 324:406fd2029f23 | 56 | ADC_HAL_SetContinuousConvCmd(adc_addrs[instance], false); |
| mbed_official | 324:406fd2029f23 | 57 | ADC_HAL_SetHwTriggerCmd(adc_addrs[instance], false); /* sw trigger */ |
| mbed_official | 324:406fd2029f23 | 58 | ADC_HAL_SetHwAverageCmd(adc_addrs[instance], true); |
| mbed_official | 324:406fd2029f23 | 59 | ADC_HAL_SetHwAverageMode(adc_addrs[instance], kAdcHwAverageCountOf4); |
| mbed_official | 324:406fd2029f23 | 60 | ADC_HAL_SetChnMuxMode(adc_addrs[instance], kAdcChnMuxOfB); /* only B channels are avail */ |
| mbed_official | 324:406fd2029f23 | 61 | |
| mbed_official | 324:406fd2029f23 | 62 | pinmap_pinout(pin, PinMap_ADC); |
| mbed_official | 324:406fd2029f23 | 63 | } |
| mbed_official | 324:406fd2029f23 | 64 | |
| mbed_official | 324:406fd2029f23 | 65 | uint16_t analogin_read_u16(analogin_t *obj) { |
| mbed_official | 324:406fd2029f23 | 66 | uint32_t instance = obj->adc >> ADC_INSTANCE_SHIFT; |
| mbed_official | 324:406fd2029f23 | 67 | uint32_t adc_addrs[] = ADC_BASE_ADDRS; |
| mbed_official | 324:406fd2029f23 | 68 | /* sw trigger (SC1A) */ |
| mbed_official | 324:406fd2029f23 | 69 | ADC_HAL_ConfigChn(adc_addrs[instance], 0, false, false, obj->adc & 0xF); |
| mbed_official | 324:406fd2029f23 | 70 | while (!ADC_HAL_GetChnConvCompletedCmd(adc_addrs[instance], 0)); |
| mbed_official | 324:406fd2029f23 | 71 | return ADC_HAL_GetChnConvValueRAW(adc_addrs[instance], 0); |
| mbed_official | 324:406fd2029f23 | 72 | } |
| mbed_official | 324:406fd2029f23 | 73 | |
| mbed_official | 324:406fd2029f23 | 74 | float analogin_read(analogin_t *obj) { |
| mbed_official | 324:406fd2029f23 | 75 | uint16_t value = analogin_read_u16(obj); |
| mbed_official | 324:406fd2029f23 | 76 | return (float)value * (1.0f / (float)0xFFFF); |
| mbed_official | 324:406fd2029f23 | 77 | } |
| mbed_official | 324:406fd2029f23 | 78 | |
| mbed_official | 324:406fd2029f23 | 79 | #endif |
