mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

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

targets/TARGET_Atmel/TARGET_SAM_CortexM0P/pinmap.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
149:156823d33999 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 15:a81a8d6c1dfe 1 /* mbed Microcontroller Library
mbed_official 15:a81a8d6c1dfe 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 15:a81a8d6c1dfe 3 *
mbed_official 15:a81a8d6c1dfe 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 15:a81a8d6c1dfe 5 * you may not use this file except in compliance with the License.
mbed_official 15:a81a8d6c1dfe 6 * You may obtain a copy of the License at
mbed_official 15:a81a8d6c1dfe 7 *
mbed_official 15:a81a8d6c1dfe 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 15:a81a8d6c1dfe 9 *
mbed_official 15:a81a8d6c1dfe 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 15:a81a8d6c1dfe 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 15:a81a8d6c1dfe 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 15:a81a8d6c1dfe 13 * See the License for the specific language governing permissions and
mbed_official 15:a81a8d6c1dfe 14 * limitations under the License.
mbed_official 15:a81a8d6c1dfe 15 */
mbed_official 15:a81a8d6c1dfe 16 #include <stddef.h>
mbed_official 15:a81a8d6c1dfe 17
mbed_official 15:a81a8d6c1dfe 18 #include "cmsis.h"
mbed_official 15:a81a8d6c1dfe 19 #include "mbed_assert.h"
mbed_official 15:a81a8d6c1dfe 20 #include "compiler.h"
mbed_official 15:a81a8d6c1dfe 21
mbed_official 15:a81a8d6c1dfe 22 #include "pinmux.h"
mbed_official 15:a81a8d6c1dfe 23 #include "pinmap.h"
mbed_official 15:a81a8d6c1dfe 24
mbed_official 15:a81a8d6c1dfe 25 extern uint8_t g_sys_init;
mbed_official 15:a81a8d6c1dfe 26
mbed_official 15:a81a8d6c1dfe 27
mbed_official 15:a81a8d6c1dfe 28 static inline void pinmux_get_current_config(PinName pin, struct system_pinmux_config *const config)
mbed_official 15:a81a8d6c1dfe 29 {
mbed_official 15:a81a8d6c1dfe 30 MBED_ASSERT(pin != (PinName)NC);
mbed_official 15:a81a8d6c1dfe 31 uint32_t pin_index = pin % 32;
mbed_official 15:a81a8d6c1dfe 32 uint32_t pin_mask = (uint32_t)(1UL << pin_index);
mbed_official 15:a81a8d6c1dfe 33
mbed_official 15:a81a8d6c1dfe 34 PortGroup *const port = system_pinmux_get_group_from_gpio_pin(pin);
mbed_official 15:a81a8d6c1dfe 35 MBED_ASSERT(port);
mbed_official 15:a81a8d6c1dfe 36
mbed_official 15:a81a8d6c1dfe 37 config->mux_position = system_pinmux_pin_get_mux_position(pin);
mbed_official 15:a81a8d6c1dfe 38
mbed_official 15:a81a8d6c1dfe 39 if (port->PINCFG[pin_index].reg & PORT_PINCFG_INEN) {
mbed_official 15:a81a8d6c1dfe 40 if (port->DIR.reg & pin_mask) {
mbed_official 15:a81a8d6c1dfe 41 config->direction = SYSTEM_PINMUX_PIN_DIR_OUTPUT_WITH_READBACK;
mbed_official 15:a81a8d6c1dfe 42 config->input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
mbed_official 15:a81a8d6c1dfe 43 } else {
mbed_official 15:a81a8d6c1dfe 44 config->direction = SYSTEM_PINMUX_PIN_DIR_INPUT;
mbed_official 15:a81a8d6c1dfe 45 if (port->PINCFG[pin_index].reg & PORT_PINCFG_PULLEN) {
mbed_official 15:a81a8d6c1dfe 46 if (port->OUT.reg & pin_mask) {
mbed_official 15:a81a8d6c1dfe 47 config->input_pull = SYSTEM_PINMUX_PIN_PULL_UP;
mbed_official 15:a81a8d6c1dfe 48 } else {
mbed_official 15:a81a8d6c1dfe 49 config->input_pull = SYSTEM_PINMUX_PIN_PULL_DOWN;
mbed_official 15:a81a8d6c1dfe 50 }
mbed_official 15:a81a8d6c1dfe 51 } else {
mbed_official 15:a81a8d6c1dfe 52 config->input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
mbed_official 15:a81a8d6c1dfe 53 }
mbed_official 15:a81a8d6c1dfe 54 }
mbed_official 15:a81a8d6c1dfe 55 } else {
mbed_official 15:a81a8d6c1dfe 56 config->input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
mbed_official 15:a81a8d6c1dfe 57 config->direction = SYSTEM_PINMUX_PIN_DIR_OUTPUT;
mbed_official 15:a81a8d6c1dfe 58 }
mbed_official 15:a81a8d6c1dfe 59
mbed_official 15:a81a8d6c1dfe 60 /* Not relevant for now */
mbed_official 15:a81a8d6c1dfe 61 config->powersave = false;
mbed_official 15:a81a8d6c1dfe 62 }
mbed_official 15:a81a8d6c1dfe 63
mbed_official 15:a81a8d6c1dfe 64 /** Change the MUX padding of input pin
mbed_official 15:a81a8d6c1dfe 65 *
mbed_official 15:a81a8d6c1dfe 66 * Configure the pin for specific module
mbed_official 15:a81a8d6c1dfe 67 * @param[in] pin Pin name whose MUX padding is to be changed
mbed_official 15:a81a8d6c1dfe 68 * @param[in] function The MUX mode to be selected
mbed_official 15:a81a8d6c1dfe 69 * @return void
mbed_official 15:a81a8d6c1dfe 70 */
mbed_official 15:a81a8d6c1dfe 71 void pin_function(PinName pin, int function)
mbed_official 15:a81a8d6c1dfe 72 {
mbed_official 15:a81a8d6c1dfe 73 MBED_ASSERT(pin != (PinName)NC);
mbed_official 15:a81a8d6c1dfe 74
mbed_official 15:a81a8d6c1dfe 75 struct system_pinmux_config pin_conf;
mbed_official 15:a81a8d6c1dfe 76
mbed_official 15:a81a8d6c1dfe 77 pinmux_get_current_config(pin, &pin_conf);
mbed_official 15:a81a8d6c1dfe 78 pin_conf.mux_position = function;
mbed_official 15:a81a8d6c1dfe 79
mbed_official 15:a81a8d6c1dfe 80 system_pinmux_pin_set_config(pin, &pin_conf);
mbed_official 15:a81a8d6c1dfe 81 }
mbed_official 15:a81a8d6c1dfe 82
mbed_official 15:a81a8d6c1dfe 83 /** Change the pin pull mode
mbed_official 15:a81a8d6c1dfe 84 *
mbed_official 15:a81a8d6c1dfe 85 * Configure the pin pull mode
mbed_official 15:a81a8d6c1dfe 86 * @param[in] pin Pin name whose MUX padding is to be changed
mbed_official 15:a81a8d6c1dfe 87 * @param[in] mode Pin pull mode to be set
mbed_official 15:a81a8d6c1dfe 88 * @return void
mbed_official 15:a81a8d6c1dfe 89 */
mbed_official 15:a81a8d6c1dfe 90 void pin_mode(PinName pin, PinMode mode)
mbed_official 15:a81a8d6c1dfe 91 {
mbed_official 15:a81a8d6c1dfe 92 MBED_ASSERT(pin != (PinName)NC);
mbed_official 15:a81a8d6c1dfe 93
mbed_official 15:a81a8d6c1dfe 94 struct system_pinmux_config pin_conf;
mbed_official 15:a81a8d6c1dfe 95
mbed_official 15:a81a8d6c1dfe 96 pinmux_get_current_config(pin, &pin_conf);
mbed_official 15:a81a8d6c1dfe 97 if (mode == PullUp) {
mbed_official 15:a81a8d6c1dfe 98 pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_UP;
mbed_official 15:a81a8d6c1dfe 99 } else if (mode == PullDown) {
mbed_official 15:a81a8d6c1dfe 100 pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_DOWN;
mbed_official 15:a81a8d6c1dfe 101 } else {
mbed_official 15:a81a8d6c1dfe 102 pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
mbed_official 15:a81a8d6c1dfe 103 }
mbed_official 15:a81a8d6c1dfe 104
mbed_official 15:a81a8d6c1dfe 105 system_pinmux_pin_set_config(pin, &pin_conf);
mbed_official 64:41a834223ea3 106 }