mbed library sources. Supersedes mbed-src.
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Diff: targets/TARGET_NUVOTON/TARGET_M451/analogin_api.c
- Revision:
- 153:9398a535854b
- Parent:
- 152:9a67f0b066fc
--- a/targets/TARGET_NUVOTON/TARGET_M451/analogin_api.c Thu Dec 15 11:48:27 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,160 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2015-2016 Nuvoton - * - * 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_api.h" - -#if DEVICE_ANALOGIN - -#include "cmsis.h" -#include "pinmap.h" -#include "PeripheralPins.h" -#include "nu_modutil.h" - -struct nu_adc_var { - uint32_t en_msk; -}; - -static struct nu_adc_var adc0_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc1_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc2_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc3_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc4_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc5_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc6_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc7_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc8_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc9_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc10_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc11_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc12_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc13_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc14_var = { - .en_msk = 0 -}; -static struct nu_adc_var adc15_var = { - .en_msk = 0 -}; - -static const struct nu_modinit_s adc_modinit_tab[] = { - {ADC_0_0, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc0_var}, - {ADC_0_1, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc1_var}, - {ADC_0_2, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc2_var}, - {ADC_0_3, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc3_var}, - {ADC_0_4, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc4_var}, - {ADC_0_5, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc5_var}, - {ADC_0_6, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc6_var}, - {ADC_0_7, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc7_var}, - {ADC_0_8, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc8_var}, - {ADC_0_9, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc9_var}, - {ADC_0_10, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc10_var}, - {ADC_0_11, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc11_var}, - {ADC_0_12, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc12_var}, - {ADC_0_13, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc13_var}, - {ADC_0_14, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc14_var}, - {ADC_0_15, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, &adc15_var}, -}; - -void analogin_init(analogin_t *obj, PinName pin) -{ - obj->adc = (ADCName) pinmap_peripheral(pin, PinMap_ADC); - MBED_ASSERT(obj->adc != (ADCName) NC); - - const struct nu_modinit_s *modinit = get_modinit(obj->adc, adc_modinit_tab); - MBED_ASSERT(modinit != NULL); - MBED_ASSERT(modinit->modname == obj->adc); - - EADC_T *eadc_base = (EADC_T *) NU_MODBASE(obj->adc); - - // NOTE: All channels (identified by ADCName) share a ADC module. This reset will also affect other channels of the same ADC module. - if (! ((struct nu_adc_var *) modinit->var)->en_msk) { - // Reset this module if no channel enabled - SYS_ResetModule(modinit->rsetidx); - - // Select clock source of paired channels - CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv); - // Enable clock of paired channels - CLK_EnableModuleClock(modinit->clkidx); - - // Power on ADC - //ADC_POWER_ON(ADC); - - // Set the ADC internal sampling time, input mode as single-end and enable the A/D converter - EADC_Open(eadc_base, EADC_CTL_DIFFEN_SINGLE_END); - EADC_SetInternalSampleTime(eadc_base, 6); - } - - uint32_t chn = NU_MODSUBINDEX(obj->adc); - - // Wire pinout - pinmap_pinout(pin, PinMap_ADC); - - // Configure the sample module Nmod for analog input channel Nch and software trigger source - EADC_ConfigSampleModule(EADC, chn, EADC_SOFTWARE_TRIGGER, chn); - - ((struct nu_adc_var *) modinit->var)->en_msk |= 1 << chn; -} - -uint16_t analogin_read_u16(analogin_t *obj) -{ - EADC_T *eadc_base = (EADC_T *) NU_MODBASE(obj->adc); - uint32_t chn = NU_MODSUBINDEX(obj->adc); - - EADC_START_CONV(eadc_base, 1 << chn); - while (EADC_GET_PENDING_CONV(eadc_base) & (1 << chn)); - uint16_t conv_res_12 = EADC_GET_CONV_DATA(eadc_base, chn); - // Just 12 bits are effective. Convert to 16 bits. - // conv_res_12: 0000 b11b10b9b8 b7b6b5b4 b3b2b1b0 - // conv_res_16: b11b10b9b8 b7b6b5b4 b3b2b1b0 b11b10b9b8 - uint16_t conv_res_16 = (conv_res_12 << 4) | (conv_res_12 >> 8); - - return conv_res_16; -} - -float analogin_read(analogin_t *obj) -{ - uint16_t value = analogin_read_u16(obj); - return (float) value * (1.0f / (float) 0xFFFF); -} - -#endif