differential input adc board K64F Compatible hal freescale K64F
Dependents: trms_helloworld AnalogIn_Diff_helloworld
Fork of AnalogIn_Diff by
Diff: AnalohIn_Diff.cpp
- Revision:
- 5:c24df4d64aa1
- Parent:
- 4:a833fa5cce1e
- Child:
- 6:f39be15f056c
--- a/AnalohIn_Diff.cpp Tue Sep 22 13:40:55 2015 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,88 +0,0 @@ -/* 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 "AnalogIn_Diff.h" - -#if FSL_FEATURE_ADC_HAS_DIFF_MODE - - - -AnalogIn_Diff::AnalogIn_Diff(int adc_ch) -{ - - const uint32_t temp[] = ADC_BASE_ADDRS; - for (int i = 0; i < sizeof(temp) / sizeof(temp[0]); i++) - adc_addrs[i] = temp[i]; - - - instance=(adc_ch>>1)&1; - chnNum=(adc_ch>>0)&1; - - - CLOCK_SYS_EnableAdcClock(instance); - - uint32_t bus_clock; - CLOCK_SYS_GetFreq(kBusClock, &bus_clock); - uint32_t clkdiv; - for (clkdiv = 0; clkdiv < 4; clkdiv++) { - if ((bus_clock >> clkdiv) <= MAX_FADC) - break; - } - if (clkdiv == 4) { - clkdiv = 0x3; //Set max div - } - - /* adc is enabled/triggered when reading. */ - - ADC_HAL_Init(adc_addrs[instance]); - ADC_HAL_SetClkSrcMode(adc_addrs[instance], kAdcClkSrcOfBusClk); - ADC_HAL_SetClkDividerMode(adc_addrs[instance], (adc_clk_divider_mode_t)(clkdiv & 0x3)); - ADC_HAL_SetRefVoltSrcMode(adc_addrs[instance], kAdcRefVoltSrcOfVref); - ADC_HAL_SetResolutionMode(adc_addrs[instance], kAdcResolutionBitOfDiffModeAs16); - ADC_HAL_SetContinuousConvCmd(adc_addrs[instance], false);//false - ADC_HAL_SetHwTriggerCmd(adc_addrs[instance], false); /* sw trigger */ - ADC_HAL_SetHwAverageCmd(adc_addrs[instance], false); /*Average*/ - //ADC_HAL_SetHwAverageCmd(adc_addrs[instance], true); - //ADC_HAL_SetHwAverageMode(adc_addrs[instance], kAdcHwAverageCountOf32); - ADC_HAL_SetChnMuxMode(adc_addrs[instance], kAdcChnMuxOfB); /* only B channels are avail */ - -} - -AnalogIn_Diff::~AnalogIn_Diff() { } - -void AnalogIn_Diff::test (int x) -{ - printf("\r\n %i: 0x%08lx\r\n",x,(long)adc_addrs[instance]); -} - - -int16_t AnalogIn_Diff::read_raws16() // Returns a 16bit signed integer -{ - /* sw trigger (SC1A) */ - - ADC_HAL_ConfigChn(adc_addrs[instance], 0, false, true, chnNum); - while (!ADC_HAL_GetChnConvCompletedCmd(adc_addrs[instance], 0)); - return ADC_HAL_GetChnConvValueRAW(adc_addrs[instance], 0); - -} - -float AnalogIn_Diff::read() -{ - int16_t value = read_raws16(); - return (float)value * (1.0f / (float)0xFFFF); -} - -#endif // FSL_FEATURE_ADC_HAS_DIFF_MODE