diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/analogin_api.c')
-rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/analogin_api.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/analogin_api.c b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/analogin_api.c new file mode 100644 index 0000000000..67f5fdd479 --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/analogin_api.c @@ -0,0 +1,79 @@ +/* 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" +#include "fsl_device_registers.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; + uint32_t adc_addrs[] = ADC_BASE_ADDRS; + + 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], kAdcResolutionBitOfSingleEndAs16); + ADC_HAL_SetContinuousConvCmd(adc_addrs[instance], false); + ADC_HAL_SetHwTriggerCmd(adc_addrs[instance], false); /* sw trigger */ + ADC_HAL_SetHwAverageCmd(adc_addrs[instance], true); + ADC_HAL_SetHwAverageMode(adc_addrs[instance], kAdcHwAverageCountOf4); + ADC_HAL_SetChnMuxMode(adc_addrs[instance], kAdcChnMuxOfB); /* 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; + uint32_t adc_addrs[] = ADC_BASE_ADDRS; + /* sw trigger (SC1A) */ + ADC_HAL_ConfigChn(adc_addrs[instance], 0, false, false, obj->adc & 0xF); + while (!ADC_HAL_GetChnConvCompletedCmd(adc_addrs[instance], 0)); + return ADC_HAL_GetChnConvValueRAW(adc_addrs[instance], 0); +} + +float analogin_read(analogin_t *obj) { + uint16_t value = analogin_read_u16(obj); + return (float)value * (1.0f / (float)0xFFFF); +} + +#endif |