mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_NUVOTON/TARGET_NUC472/analogin_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
161:2cc1468da177 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015-2016 Nuvoton
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16
<> 144:ef7eb2e8f9f7 17 #include "analogin_api.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #if DEVICE_ANALOGIN
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 22 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 23 #include "PeripheralPins.h"
<> 144:ef7eb2e8f9f7 24 #include "nu_modutil.h"
<> 144:ef7eb2e8f9f7 25
<> 153:fa9ff456f731 26 static uint32_t eadc_modinit_mask = 0;
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 static const struct nu_modinit_s adc_modinit_tab[] = {
<> 153:fa9ff456f731 29 {ADC_0_0, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 30 {ADC_0_1, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 31 {ADC_0_2, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 32 {ADC_0_3, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 33 {ADC_0_4, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 34 {ADC_0_5, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 35 {ADC_0_6, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 36 {ADC_0_7, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 37
<> 153:fa9ff456f731 38 {ADC_1_0, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 39 {ADC_1_1, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 40 {ADC_1_2, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 41 {ADC_1_3, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 42 {ADC_1_4, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 43 {ADC_1_5, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 44 {ADC_1_6, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL},
<> 153:fa9ff456f731 45 {ADC_1_7, EADC_MODULE, CLK_CLKSEL1_ADCSEL_PLL, CLK_CLKDIV0_ADC(5), ADC_RST, EADC0_IRQn, NULL}
<> 144:ef7eb2e8f9f7 46 };
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 void analogin_init(analogin_t *obj, PinName pin)
<> 144:ef7eb2e8f9f7 49 {
<> 144:ef7eb2e8f9f7 50 obj->adc = (ADCName) pinmap_peripheral(pin, PinMap_ADC);
<> 144:ef7eb2e8f9f7 51 MBED_ASSERT(obj->adc != (ADCName) NC);
<> 144:ef7eb2e8f9f7 52
<> 144:ef7eb2e8f9f7 53 const struct nu_modinit_s *modinit = get_modinit(obj->adc, adc_modinit_tab);
<> 144:ef7eb2e8f9f7 54 MBED_ASSERT(modinit != NULL);
<> 144:ef7eb2e8f9f7 55 MBED_ASSERT(modinit->modname == obj->adc);
<> 144:ef7eb2e8f9f7 56
<> 153:fa9ff456f731 57 EADC_T *eadc_base = (EADC_T *) NU_MODBASE(obj->adc);
<> 153:fa9ff456f731 58
<> 144:ef7eb2e8f9f7 59 // NOTE: All channels (identified by ADCName) share a ADC module. This reset will also affect other channels of the same ADC module.
<> 153:fa9ff456f731 60 if (! eadc_modinit_mask) {
<> 144:ef7eb2e8f9f7 61 // Reset this module if no channel enabled
<> 144:ef7eb2e8f9f7 62 SYS_ResetModule(modinit->rsetidx);
<> 144:ef7eb2e8f9f7 63
<> 144:ef7eb2e8f9f7 64 // Select clock source of paired channels
<> 144:ef7eb2e8f9f7 65 CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv);
<> 144:ef7eb2e8f9f7 66 // Enable clock of paired channels
<> 144:ef7eb2e8f9f7 67 CLK_EnableModuleClock(modinit->clkidx);
<> 144:ef7eb2e8f9f7 68
<> 153:fa9ff456f731 69 // Make EADC_module ready to convert
<> 153:fa9ff456f731 70 EADC_Open(eadc_base, 0);
<> 144:ef7eb2e8f9f7 71 }
<> 144:ef7eb2e8f9f7 72
<> 161:2cc1468da177 73 uint32_t smp_chn = NU_MODSUBINDEX(obj->adc);
<> 161:2cc1468da177 74 uint32_t smp_mod = NU_MODINDEX(obj->adc) * 8 + smp_chn;
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 // Wire pinout
<> 144:ef7eb2e8f9f7 77 pinmap_pinout(pin, PinMap_ADC);
<> 144:ef7eb2e8f9f7 78
<> 153:fa9ff456f731 79 // Configure the sample module Nmod for analog input channel Nch and software trigger source
<> 161:2cc1468da177 80 EADC_ConfigSampleModule(eadc_base, smp_mod, EADC_SOFTWARE_TRIGGER, smp_chn);
<> 144:ef7eb2e8f9f7 81
<> 161:2cc1468da177 82 eadc_modinit_mask |= 1 << smp_mod;
<> 144:ef7eb2e8f9f7 83 }
<> 144:ef7eb2e8f9f7 84
<> 144:ef7eb2e8f9f7 85 uint16_t analogin_read_u16(analogin_t *obj)
<> 144:ef7eb2e8f9f7 86 {
<> 153:fa9ff456f731 87 EADC_T *eadc_base = (EADC_T *) NU_MODBASE(obj->adc);
<> 161:2cc1468da177 88 uint32_t smp_chn = NU_MODSUBINDEX(obj->adc);
<> 161:2cc1468da177 89 uint32_t smp_mod = NU_MODINDEX(obj->adc) * 8 + smp_chn;
<> 144:ef7eb2e8f9f7 90
<> 161:2cc1468da177 91 EADC_START_CONV(eadc_base, 1 << smp_mod);
<> 161:2cc1468da177 92 while (EADC_GET_DATA_VALID_FLAG(eadc_base, 1 << smp_mod) != (1 << smp_mod));
<> 161:2cc1468da177 93 uint16_t conv_res_12 = EADC_GET_CONV_DATA(eadc_base, smp_mod);
<> 144:ef7eb2e8f9f7 94 // Just 12 bits are effective. Convert to 16 bits.
<> 144:ef7eb2e8f9f7 95 // conv_res_12: 0000 b11b10b9b8 b7b6b5b4 b3b2b1b0
<> 144:ef7eb2e8f9f7 96 // conv_res_16: b11b10b9b8 b7b6b5b4 b3b2b1b0 b11b10b9b8
<> 144:ef7eb2e8f9f7 97 uint16_t conv_res_16 = (conv_res_12 << 4) | (conv_res_12 >> 8);
<> 144:ef7eb2e8f9f7 98
<> 144:ef7eb2e8f9f7 99 return conv_res_16;
<> 144:ef7eb2e8f9f7 100 }
<> 144:ef7eb2e8f9f7 101
<> 144:ef7eb2e8f9f7 102 float analogin_read(analogin_t *obj)
<> 144:ef7eb2e8f9f7 103 {
<> 144:ef7eb2e8f9f7 104 uint16_t value = analogin_read_u16(obj);
<> 144:ef7eb2e8f9f7 105 return (float) value * (1.0f / (float) 0xFFFF);
<> 144:ef7eb2e8f9f7 106 }
<> 144:ef7eb2e8f9f7 107
<> 144:ef7eb2e8f9f7 108 #endif