ON Semiconductor / mbed-os

5.2.1 - Updated I2C files

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

targets/TARGET_NUVOTON/TARGET_M451/analogin_api.c@1:f30bdcd2b33b, 2017-02-27 (annotated)

Committer:
jacobjohnson
Date:
Mon Feb 27 17:45:05 2017 +0000
Revision:
1:f30bdcd2b33b
Parent:
0:098463de4c5d 
changed the inputscale from 1 to 7 in analogin_api.c.  This will need to be changed later, and accessed from the main level, but for now this allows the  adc to read a value from 0 to 3.7V, instead of just up to 1V.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 * Copyright (c) 2015-2016 Nuvoton
group-onsemi 0:098463de4c5d 3 *
group-onsemi 0:098463de4c5d 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-onsemi 0:098463de4c5d 5 * you may not use this file except in compliance with the License.
group-onsemi 0:098463de4c5d 6 * You may obtain a copy of the License at
group-onsemi 0:098463de4c5d 7 *
group-onsemi 0:098463de4c5d 8 * http://www.apache.org/licenses/LICENSE-2.0
group-onsemi 0:098463de4c5d 9 *
group-onsemi 0:098463de4c5d 10 * Unless required by applicable law or agreed to in writing, software
group-onsemi 0:098463de4c5d 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-onsemi 0:098463de4c5d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-onsemi 0:098463de4c5d 13 * See the License for the specific language governing permissions and
group-onsemi 0:098463de4c5d 14 * limitations under the License.
group-onsemi 0:098463de4c5d 15 */
group-onsemi 0:098463de4c5d 16
group-onsemi 0:098463de4c5d 17 #include "analogin_api.h"
group-onsemi 0:098463de4c5d 18
group-onsemi 0:098463de4c5d 19 #if DEVICE_ANALOGIN
group-onsemi 0:098463de4c5d 20
group-onsemi 0:098463de4c5d 21 #include "cmsis.h"
group-onsemi 0:098463de4c5d 22 #include "pinmap.h"
group-onsemi 0:098463de4c5d 23 #include "PeripheralPins.h"
group-onsemi 0:098463de4c5d 24 #include "nu_modutil.h"
group-onsemi 0:098463de4c5d 25
group-onsemi 0:098463de4c5d 26 static uint32_t eadc_modinit_mask = 0;
group-onsemi 0:098463de4c5d 27
group-onsemi 0:098463de4c5d 28 static const struct nu_modinit_s adc_modinit_tab[] = {
group-onsemi 0:098463de4c5d 29 {ADC_0_0, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 30 {ADC_0_1, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 31 {ADC_0_2, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 32 {ADC_0_3, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 33 {ADC_0_4, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 34 {ADC_0_5, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 35 {ADC_0_6, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 36 {ADC_0_7, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 37 {ADC_0_8, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 38 {ADC_0_9, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 39 {ADC_0_10, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 40 {ADC_0_11, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 41 {ADC_0_12, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 42 {ADC_0_13, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 43 {ADC_0_14, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 44 {ADC_0_15, EADC_MODULE, 0, CLK_CLKDIV0_EADC(8), EADC_RST, ADC00_IRQn, NULL},
group-onsemi 0:098463de4c5d 45 };
group-onsemi 0:098463de4c5d 46
group-onsemi 0:098463de4c5d 47 void analogin_init(analogin_t *obj, PinName pin)
group-onsemi 0:098463de4c5d 48 {
group-onsemi 0:098463de4c5d 49 obj->adc = (ADCName) pinmap_peripheral(pin, PinMap_ADC);
group-onsemi 0:098463de4c5d 50 MBED_ASSERT(obj->adc != (ADCName) NC);
group-onsemi 0:098463de4c5d 51
group-onsemi 0:098463de4c5d 52 const struct nu_modinit_s *modinit = get_modinit(obj->adc, adc_modinit_tab);
group-onsemi 0:098463de4c5d 53 MBED_ASSERT(modinit != NULL);
group-onsemi 0:098463de4c5d 54 MBED_ASSERT(modinit->modname == obj->adc);
group-onsemi 0:098463de4c5d 55
group-onsemi 0:098463de4c5d 56 EADC_T *eadc_base = (EADC_T *) NU_MODBASE(obj->adc);
group-onsemi 0:098463de4c5d 57
group-onsemi 0:098463de4c5d 58 // NOTE: All channels (identified by ADCName) share a ADC module. This reset will also affect other channels of the same ADC module.
group-onsemi 0:098463de4c5d 59 if (! eadc_modinit_mask) {
group-onsemi 0:098463de4c5d 60 // Reset this module if no channel enabled
group-onsemi 0:098463de4c5d 61 SYS_ResetModule(modinit->rsetidx);
group-onsemi 0:098463de4c5d 62
group-onsemi 0:098463de4c5d 63 // Select clock source of paired channels
group-onsemi 0:098463de4c5d 64 CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv);
group-onsemi 0:098463de4c5d 65 // Enable clock of paired channels
group-onsemi 0:098463de4c5d 66 CLK_EnableModuleClock(modinit->clkidx);
group-onsemi 0:098463de4c5d 67
group-onsemi 0:098463de4c5d 68 // Set the ADC internal sampling time, input mode as single-end and enable the A/D converter
group-onsemi 0:098463de4c5d 69 EADC_Open(eadc_base, EADC_CTL_DIFFEN_SINGLE_END);
group-onsemi 0:098463de4c5d 70 EADC_SetInternalSampleTime(eadc_base, 6);
group-onsemi 0:098463de4c5d 71 }
group-onsemi 0:098463de4c5d 72
group-onsemi 0:098463de4c5d 73 uint32_t chn = NU_MODSUBINDEX(obj->adc);
group-onsemi 0:098463de4c5d 74
group-onsemi 0:098463de4c5d 75 // Wire pinout
group-onsemi 0:098463de4c5d 76 pinmap_pinout(pin, PinMap_ADC);
group-onsemi 0:098463de4c5d 77
group-onsemi 0:098463de4c5d 78 // Configure the sample module Nmod for analog input channel Nch and software trigger source
group-onsemi 0:098463de4c5d 79 EADC_ConfigSampleModule(eadc_base, chn, EADC_SOFTWARE_TRIGGER, chn);
group-onsemi 0:098463de4c5d 80
group-onsemi 0:098463de4c5d 81 eadc_modinit_mask |= 1 << chn;
group-onsemi 0:098463de4c5d 82 }
group-onsemi 0:098463de4c5d 83
group-onsemi 0:098463de4c5d 84 uint16_t analogin_read_u16(analogin_t *obj)
group-onsemi 0:098463de4c5d 85 {
group-onsemi 0:098463de4c5d 86 EADC_T *eadc_base = (EADC_T *) NU_MODBASE(obj->adc);
group-onsemi 0:098463de4c5d 87 uint32_t chn = NU_MODSUBINDEX(obj->adc);
group-onsemi 0:098463de4c5d 88
group-onsemi 0:098463de4c5d 89 EADC_START_CONV(eadc_base, 1 << chn);
group-onsemi 0:098463de4c5d 90 while (EADC_GET_DATA_VALID_FLAG(eadc_base, 1 << chn) != (1 << chn));
group-onsemi 0:098463de4c5d 91 uint16_t conv_res_12 = EADC_GET_CONV_DATA(eadc_base, chn);
group-onsemi 0:098463de4c5d 92 // Just 12 bits are effective. Convert to 16 bits.
group-onsemi 0:098463de4c5d 93 // conv_res_12: 0000 b11b10b9b8 b7b6b5b4 b3b2b1b0
group-onsemi 0:098463de4c5d 94 // conv_res_16: b11b10b9b8 b7b6b5b4 b3b2b1b0 b11b10b9b8
group-onsemi 0:098463de4c5d 95 uint16_t conv_res_16 = (conv_res_12 << 4) | (conv_res_12 >> 8);
group-onsemi 0:098463de4c5d 96
group-onsemi 0:098463de4c5d 97 return conv_res_16;
group-onsemi 0:098463de4c5d 98 }
group-onsemi 0:098463de4c5d 99
group-onsemi 0:098463de4c5d 100 float analogin_read(analogin_t *obj)
group-onsemi 0:098463de4c5d 101 {
group-onsemi 0:098463de4c5d 102 uint16_t value = analogin_read_u16(obj);
group-onsemi 0:098463de4c5d 103 return (float) value * (1.0f / (float) 0xFFFF);
group-onsemi 0:098463de4c5d 104 }
group-onsemi 0:098463de4c5d 105
group-onsemi 0:098463de4c5d 106 #endif