mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

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

targets/TARGET_RDA/TARGET_UNO_91H/analogin_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

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

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 189:f392fc9709a3 1 /* mbed Microcontroller Library
AnnaBridge 189:f392fc9709a3 2 * Copyright (c) 2006-2018 ARM Limited
AnnaBridge 189:f392fc9709a3 3 *
AnnaBridge 189:f392fc9709a3 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 189:f392fc9709a3 5 * you may not use this file except in compliance with the License.
AnnaBridge 189:f392fc9709a3 6 * You may obtain a copy of the License at
AnnaBridge 189:f392fc9709a3 7 *
AnnaBridge 189:f392fc9709a3 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 189:f392fc9709a3 9 *
AnnaBridge 189:f392fc9709a3 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 189:f392fc9709a3 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 189:f392fc9709a3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 189:f392fc9709a3 13 * See the License for the specific language governing permissions and
AnnaBridge 189:f392fc9709a3 14 * limitations under the License.
AnnaBridge 189:f392fc9709a3 15 */
AnnaBridge 189:f392fc9709a3 16 #include "mbed_assert.h"
AnnaBridge 189:f392fc9709a3 17 #include "analogin_api.h"
AnnaBridge 189:f392fc9709a3 18 #include "pinmap.h"
AnnaBridge 189:f392fc9709a3 19
AnnaBridge 189:f392fc9709a3 20 #include "rda_ccfg_api.h"
AnnaBridge 189:f392fc9709a3 21
AnnaBridge 189:f392fc9709a3 22 #define ANALOGIN_MEDIAN_FILTER 1
AnnaBridge 189:f392fc9709a3 23 #define RDA_ADC_RANGE (0x03FFU)
AnnaBridge 189:f392fc9709a3 24
AnnaBridge 189:f392fc9709a3 25 #if DEVICE_ANALOGIN
AnnaBridge 189:f392fc9709a3 26 static const PinMap PinMap_ADC[] = {
AnnaBridge 189:f392fc9709a3 27 {PB_6, ADC0_0, 0},
AnnaBridge 189:f392fc9709a3 28 {PB_7, ADC0_1, 0},
AnnaBridge 189:f392fc9709a3 29 {PB_8, ADC0_1, 0},
AnnaBridge 189:f392fc9709a3 30 {PD_9, ADC0_2, 0},
AnnaBridge 189:f392fc9709a3 31 {NC, NC, 0}
AnnaBridge 189:f392fc9709a3 32 };
AnnaBridge 189:f392fc9709a3 33 static unsigned char adc1_gp = 0U;
AnnaBridge 189:f392fc9709a3 34 static int adc_inited_cnt = 0;
AnnaBridge 189:f392fc9709a3 35
AnnaBridge 189:f392fc9709a3 36 void analogin_init(analogin_t *obj, PinName pin)
AnnaBridge 189:f392fc9709a3 37 {
AnnaBridge 189:f392fc9709a3 38 unsigned char gp = (unsigned char)(pin & 0x00FFU);
AnnaBridge 189:f392fc9709a3 39 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
AnnaBridge 189:f392fc9709a3 40 MBED_ASSERT(obj->adc != (ADCName)NC);
AnnaBridge 189:f392fc9709a3 41
AnnaBridge 189:f392fc9709a3 42 /* Init ADC */
AnnaBridge 189:f392fc9709a3 43 if (0 == adc_inited_cnt) {
AnnaBridge 189:f392fc9709a3 44 rda_ccfg_adc_init();
AnnaBridge 189:f392fc9709a3 45 }
AnnaBridge 189:f392fc9709a3 46 adc_inited_cnt++;
AnnaBridge 189:f392fc9709a3 47 if (ADC0_2 == obj->adc) {
AnnaBridge 189:f392fc9709a3 48 return;
AnnaBridge 189:f392fc9709a3 49 }
AnnaBridge 189:f392fc9709a3 50 if ((ADC0_1 == obj->adc) && (0U == adc1_gp)) {
AnnaBridge 189:f392fc9709a3 51 adc1_gp = (2 >= rda_ccfg_hwver()) ? 7U : 8U;
AnnaBridge 189:f392fc9709a3 52 MBED_ASSERT(gp == adc1_gp);
AnnaBridge 189:f392fc9709a3 53 }
AnnaBridge 189:f392fc9709a3 54 rda_ccfg_gp(gp, 0x00U);
AnnaBridge 189:f392fc9709a3 55 rda_ccfg_adc_gp(gp, 0x00U);
AnnaBridge 189:f392fc9709a3 56 rda_ccfg_adc_oenb(obj->adc, 0x01U);
AnnaBridge 189:f392fc9709a3 57
AnnaBridge 189:f392fc9709a3 58 pinmap_pinout(pin, PinMap_ADC);
AnnaBridge 189:f392fc9709a3 59 }
AnnaBridge 189:f392fc9709a3 60
AnnaBridge 189:f392fc9709a3 61 uint16_t analogin_read_u16(analogin_t *obj)
AnnaBridge 189:f392fc9709a3 62 {
AnnaBridge 189:f392fc9709a3 63 uint16_t value = rda_ccfg_adc_read((unsigned char)(obj->adc));
AnnaBridge 189:f392fc9709a3 64 return (value); // 10 bit
AnnaBridge 189:f392fc9709a3 65 }
AnnaBridge 189:f392fc9709a3 66
AnnaBridge 189:f392fc9709a3 67 float analogin_read(analogin_t *obj)
AnnaBridge 189:f392fc9709a3 68 {
AnnaBridge 189:f392fc9709a3 69 uint16_t value = rda_ccfg_adc_read((unsigned char)(obj->adc));
AnnaBridge 189:f392fc9709a3 70 return (float)value * (1.0f / (float)RDA_ADC_RANGE);
AnnaBridge 189:f392fc9709a3 71 }
AnnaBridge 189:f392fc9709a3 72
AnnaBridge 189:f392fc9709a3 73 void analogin_free(analogin_t *obj)
AnnaBridge 189:f392fc9709a3 74 {
AnnaBridge 189:f392fc9709a3 75 unsigned char gp = 6U;
AnnaBridge 189:f392fc9709a3 76 adc_inited_cnt--;
AnnaBridge 189:f392fc9709a3 77 if (0 == adc_inited_cnt) {
AnnaBridge 189:f392fc9709a3 78 rda_ccfg_adc_free();
AnnaBridge 189:f392fc9709a3 79 }
AnnaBridge 189:f392fc9709a3 80 if (ADC0_2 == obj->adc) {
AnnaBridge 189:f392fc9709a3 81 return;
AnnaBridge 189:f392fc9709a3 82 }
AnnaBridge 189:f392fc9709a3 83 if (ADC0_1 == obj->adc) {
AnnaBridge 189:f392fc9709a3 84 if (0U == adc1_gp) {
AnnaBridge 189:f392fc9709a3 85 return;
AnnaBridge 189:f392fc9709a3 86 }
AnnaBridge 189:f392fc9709a3 87 gp = adc1_gp;
AnnaBridge 189:f392fc9709a3 88 }
AnnaBridge 189:f392fc9709a3 89 rda_ccfg_adc_gp(gp, 0x01U);
AnnaBridge 189:f392fc9709a3 90 rda_ccfg_gp(gp, 0x01U);
AnnaBridge 189:f392fc9709a3 91 }
AnnaBridge 189:f392fc9709a3 92 #endif /* DEVICE_ANALOGIN */