mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

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

targets/TARGET_Cypress/TARGET_PSOC6/gpio_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
188:bcfe06ba3d64 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 188:bcfe06ba3d64 1 /*
AnnaBridge 188:bcfe06ba3d64 2 * mbed Microcontroller Library
AnnaBridge 188:bcfe06ba3d64 3 * Copyright (c) 2017-2018 Future Electronics
AnnaBridge 189:f392fc9709a3 4 * Copyright (c) 2018-2019 Cypress Semiconductor Corporation
AnnaBridge 189:f392fc9709a3 5 * SPDX-License-Identifier: Apache-2.0
AnnaBridge 188:bcfe06ba3d64 6 *
AnnaBridge 188:bcfe06ba3d64 7 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 188:bcfe06ba3d64 8 * you may not use this file except in compliance with the License.
AnnaBridge 188:bcfe06ba3d64 9 * You may obtain a copy of the License at
AnnaBridge 188:bcfe06ba3d64 10 *
AnnaBridge 188:bcfe06ba3d64 11 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 188:bcfe06ba3d64 12 *
AnnaBridge 188:bcfe06ba3d64 13 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 188:bcfe06ba3d64 14 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 188:bcfe06ba3d64 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 188:bcfe06ba3d64 16 * See the License for the specific language governing permissions and
AnnaBridge 188:bcfe06ba3d64 17 * limitations under the License.
AnnaBridge 188:bcfe06ba3d64 18 */
AnnaBridge 188:bcfe06ba3d64 19
AnnaBridge 188:bcfe06ba3d64 20 #include "cmsis.h"
AnnaBridge 188:bcfe06ba3d64 21 #include "device.h"
AnnaBridge 188:bcfe06ba3d64 22 #include "mbed_assert.h"
AnnaBridge 188:bcfe06ba3d64 23 #include "gpio_object.h"
AnnaBridge 188:bcfe06ba3d64 24 #include "psoc6_utils.h"
AnnaBridge 188:bcfe06ba3d64 25 #include "mbed_error.h"
AnnaBridge 188:bcfe06ba3d64 26 #include "rtx_lib.h"
AnnaBridge 188:bcfe06ba3d64 27
AnnaBridge 188:bcfe06ba3d64 28 static inline void gpio_set_dir_mode(gpio_t *obj)
AnnaBridge 188:bcfe06ba3d64 29 {
AnnaBridge 188:bcfe06ba3d64 30 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 31 MBED_ASSERT(obj->port);
AnnaBridge 188:bcfe06ba3d64 32 MBED_ASSERT(obj->pin != NC);
AnnaBridge 188:bcfe06ba3d64 33
AnnaBridge 188:bcfe06ba3d64 34 uint32_t pin = CY_PIN(obj->pin);
AnnaBridge 188:bcfe06ba3d64 35 uint32_t cymode = gpio_get_cy_drive_mode(obj->dir, obj->mode);
AnnaBridge 188:bcfe06ba3d64 36
AnnaBridge 188:bcfe06ba3d64 37 Cy_GPIO_SetDrivemode(obj->port, pin, cymode);
AnnaBridge 188:bcfe06ba3d64 38
AnnaBridge 188:bcfe06ba3d64 39 if (obj->dir == PIN_INPUT) {
AnnaBridge 188:bcfe06ba3d64 40 // Force output to enable pulls.
AnnaBridge 188:bcfe06ba3d64 41 switch (cymode) {
AnnaBridge 188:bcfe06ba3d64 42 case CY_GPIO_DM_PULLUP:
AnnaBridge 188:bcfe06ba3d64 43 Cy_GPIO_Write(obj->port, pin, 1);
AnnaBridge 188:bcfe06ba3d64 44 break;
AnnaBridge 188:bcfe06ba3d64 45 case CY_GPIO_DM_PULLDOWN:
AnnaBridge 188:bcfe06ba3d64 46 Cy_GPIO_Write(obj->port, pin, 0);
AnnaBridge 188:bcfe06ba3d64 47 break;
AnnaBridge 188:bcfe06ba3d64 48 }
AnnaBridge 188:bcfe06ba3d64 49 }
AnnaBridge 188:bcfe06ba3d64 50 }
AnnaBridge 188:bcfe06ba3d64 51
AnnaBridge 188:bcfe06ba3d64 52 void gpio_init(gpio_t *obj, PinName pin)
AnnaBridge 188:bcfe06ba3d64 53 {
AnnaBridge 188:bcfe06ba3d64 54 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 55 obj->pin = pin;
AnnaBridge 188:bcfe06ba3d64 56 obj->dir = PIN_INPUT;
AnnaBridge 188:bcfe06ba3d64 57 obj->mode = PullNone;
AnnaBridge 188:bcfe06ba3d64 58
AnnaBridge 188:bcfe06ba3d64 59 if (pin == NC) {
AnnaBridge 188:bcfe06ba3d64 60 return;
AnnaBridge 188:bcfe06ba3d64 61 }
AnnaBridge 188:bcfe06ba3d64 62
AnnaBridge 188:bcfe06ba3d64 63 MBED_ASSERT(CY_PIN(obj->pin) < 8); // PSoC6 architecture supports 8 pins per port.
AnnaBridge 188:bcfe06ba3d64 64
AnnaBridge 189:f392fc9709a3 65 /* Ignore pin reservation result because there is not possibility to release
AnnaBridge 189:f392fc9709a3 66 * reserved HW resource. The MBED does not provide proper destructors for
AnnaBridge 189:f392fc9709a3 67 * doing that.
AnnaBridge 189:f392fc9709a3 68 */
AnnaBridge 188:bcfe06ba3d64 69 if (!(IsIrqMode() || IsIrqMasked())) {
AnnaBridge 189:f392fc9709a3 70 (void) cy_reserve_io_pin(pin);
AnnaBridge 188:bcfe06ba3d64 71 }
AnnaBridge 189:f392fc9709a3 72
AnnaBridge 188:bcfe06ba3d64 73 obj->port = Cy_GPIO_PortToAddr(CY_PORT(obj->pin));
AnnaBridge 188:bcfe06ba3d64 74
AnnaBridge 188:bcfe06ba3d64 75 const uint32_t outputVal = 0;
AnnaBridge 188:bcfe06ba3d64 76
AnnaBridge 188:bcfe06ba3d64 77 Cy_GPIO_Pin_FastInit(obj->port, CY_PIN(obj->pin), CY_GPIO_DM_HIGHZ, outputVal, HSIOM_SEL_GPIO);
AnnaBridge 188:bcfe06ba3d64 78 }
AnnaBridge 188:bcfe06ba3d64 79
AnnaBridge 188:bcfe06ba3d64 80 void gpio_mode(gpio_t *obj, PinMode mode)
AnnaBridge 188:bcfe06ba3d64 81 {
AnnaBridge 188:bcfe06ba3d64 82 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 83 MBED_ASSERT(obj->pin != NC);
AnnaBridge 188:bcfe06ba3d64 84
AnnaBridge 188:bcfe06ba3d64 85 obj->mode = mode;
AnnaBridge 188:bcfe06ba3d64 86 gpio_set_dir_mode(obj);
AnnaBridge 188:bcfe06ba3d64 87 }
AnnaBridge 188:bcfe06ba3d64 88
AnnaBridge 188:bcfe06ba3d64 89 void gpio_dir(gpio_t *obj, PinDirection direction)
AnnaBridge 188:bcfe06ba3d64 90 {
AnnaBridge 188:bcfe06ba3d64 91 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 92 MBED_ASSERT(obj->pin != NC);
AnnaBridge 188:bcfe06ba3d64 93
AnnaBridge 188:bcfe06ba3d64 94 obj->dir = direction;
AnnaBridge 188:bcfe06ba3d64 95 gpio_set_dir_mode(obj);
AnnaBridge 188:bcfe06ba3d64 96 }