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@188:bcfe06ba3d64, 2018-11-08 (annotated)

Committer:
AnnaBridge
Date:
Thu Nov 08 11:46:34 2018 +0000
Revision:
188:bcfe06ba3d64
Child:
189:f392fc9709a3
mbed-dev library. Release version 164

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 188:bcfe06ba3d64 4 *
AnnaBridge 188:bcfe06ba3d64 5 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 188:bcfe06ba3d64 6 * you may not use this file except in compliance with the License.
AnnaBridge 188:bcfe06ba3d64 7 * You may obtain a copy of the License at
AnnaBridge 188:bcfe06ba3d64 8 *
AnnaBridge 188:bcfe06ba3d64 9 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 188:bcfe06ba3d64 10 *
AnnaBridge 188:bcfe06ba3d64 11 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 188:bcfe06ba3d64 12 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 188:bcfe06ba3d64 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 188:bcfe06ba3d64 14 * See the License for the specific language governing permissions and
AnnaBridge 188:bcfe06ba3d64 15 * limitations under the License.
AnnaBridge 188:bcfe06ba3d64 16 */
AnnaBridge 188:bcfe06ba3d64 17
AnnaBridge 188:bcfe06ba3d64 18 #include "cmsis.h"
AnnaBridge 188:bcfe06ba3d64 19 #include "device.h"
AnnaBridge 188:bcfe06ba3d64 20 #include "mbed_assert.h"
AnnaBridge 188:bcfe06ba3d64 21 #include "gpio_object.h"
AnnaBridge 188:bcfe06ba3d64 22 #include "psoc6_utils.h"
AnnaBridge 188:bcfe06ba3d64 23 #include "mbed_error.h"
AnnaBridge 188:bcfe06ba3d64 24 #include "rtx_lib.h"
AnnaBridge 188:bcfe06ba3d64 25
AnnaBridge 188:bcfe06ba3d64 26 static inline void gpio_set_dir_mode(gpio_t *obj)
AnnaBridge 188:bcfe06ba3d64 27 {
AnnaBridge 188:bcfe06ba3d64 28 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 29 MBED_ASSERT(obj->port);
AnnaBridge 188:bcfe06ba3d64 30 MBED_ASSERT(obj->pin != NC);
AnnaBridge 188:bcfe06ba3d64 31
AnnaBridge 188:bcfe06ba3d64 32 uint32_t pin = CY_PIN(obj->pin);
AnnaBridge 188:bcfe06ba3d64 33 uint32_t cymode = gpio_get_cy_drive_mode(obj->dir, obj->mode);
AnnaBridge 188:bcfe06ba3d64 34
AnnaBridge 188:bcfe06ba3d64 35 Cy_GPIO_SetDrivemode(obj->port, pin, cymode);
AnnaBridge 188:bcfe06ba3d64 36
AnnaBridge 188:bcfe06ba3d64 37 if (obj->dir == PIN_INPUT) {
AnnaBridge 188:bcfe06ba3d64 38 // Force output to enable pulls.
AnnaBridge 188:bcfe06ba3d64 39 switch (cymode) {
AnnaBridge 188:bcfe06ba3d64 40 case CY_GPIO_DM_PULLUP:
AnnaBridge 188:bcfe06ba3d64 41 Cy_GPIO_Write(obj->port, pin, 1);
AnnaBridge 188:bcfe06ba3d64 42 break;
AnnaBridge 188:bcfe06ba3d64 43 case CY_GPIO_DM_PULLDOWN:
AnnaBridge 188:bcfe06ba3d64 44 Cy_GPIO_Write(obj->port, pin, 0);
AnnaBridge 188:bcfe06ba3d64 45 break;
AnnaBridge 188:bcfe06ba3d64 46 }
AnnaBridge 188:bcfe06ba3d64 47 }
AnnaBridge 188:bcfe06ba3d64 48 }
AnnaBridge 188:bcfe06ba3d64 49
AnnaBridge 188:bcfe06ba3d64 50 void gpio_init(gpio_t *obj, PinName pin)
AnnaBridge 188:bcfe06ba3d64 51 {
AnnaBridge 188:bcfe06ba3d64 52 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 53 obj->pin = pin;
AnnaBridge 188:bcfe06ba3d64 54 obj->dir = PIN_INPUT;
AnnaBridge 188:bcfe06ba3d64 55 obj->mode = PullNone;
AnnaBridge 188:bcfe06ba3d64 56
AnnaBridge 188:bcfe06ba3d64 57 if (pin == NC) {
AnnaBridge 188:bcfe06ba3d64 58 return;
AnnaBridge 188:bcfe06ba3d64 59 }
AnnaBridge 188:bcfe06ba3d64 60
AnnaBridge 188:bcfe06ba3d64 61 MBED_ASSERT(CY_PIN(obj->pin) < 8); // PSoC6 architecture supports 8 pins per port.
AnnaBridge 188:bcfe06ba3d64 62
AnnaBridge 188:bcfe06ba3d64 63 /*
AnnaBridge 188:bcfe06ba3d64 64 * Perform i/o reservation only if this is called outside of critical section/interrupt context.
AnnaBridge 188:bcfe06ba3d64 65 * This is a workaround for mbed_die() implementation, which configures LED1 inside critical section.
AnnaBridge 188:bcfe06ba3d64 66 * Normally user is advised to perform all of the i/o configuration at the program beginning,
AnnaBridge 188:bcfe06ba3d64 67 * or elsewhere in the running thread context. when we detect that we are in the wrong context here,
AnnaBridge 188:bcfe06ba3d64 68 * we assume it's explicitly called from mbed_die() or other fault handling, so eventual forcing
AnnaBridge 188:bcfe06ba3d64 69 * of the pin mode is deliberate and should not cause more problems.
AnnaBridge 188:bcfe06ba3d64 70 */
AnnaBridge 188:bcfe06ba3d64 71 if (!(IsIrqMode() || IsIrqMasked())) {
AnnaBridge 188:bcfe06ba3d64 72 if (cy_reserve_io_pin(pin)) {
AnnaBridge 188:bcfe06ba3d64 73 error("GPIO pin reservation conflict.");
AnnaBridge 188:bcfe06ba3d64 74 }
AnnaBridge 188:bcfe06ba3d64 75 }
AnnaBridge 188:bcfe06ba3d64 76 obj->port = Cy_GPIO_PortToAddr(CY_PORT(obj->pin));
AnnaBridge 188:bcfe06ba3d64 77
AnnaBridge 188:bcfe06ba3d64 78 const uint32_t outputVal = 0;
AnnaBridge 188:bcfe06ba3d64 79
AnnaBridge 188:bcfe06ba3d64 80 Cy_GPIO_Pin_FastInit(obj->port, CY_PIN(obj->pin), CY_GPIO_DM_HIGHZ, outputVal, HSIOM_SEL_GPIO);
AnnaBridge 188:bcfe06ba3d64 81 }
AnnaBridge 188:bcfe06ba3d64 82
AnnaBridge 188:bcfe06ba3d64 83 void gpio_mode(gpio_t *obj, PinMode mode)
AnnaBridge 188:bcfe06ba3d64 84 {
AnnaBridge 188:bcfe06ba3d64 85 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 86 MBED_ASSERT(obj->pin != NC);
AnnaBridge 188:bcfe06ba3d64 87
AnnaBridge 188:bcfe06ba3d64 88 obj->mode = mode;
AnnaBridge 188:bcfe06ba3d64 89 gpio_set_dir_mode(obj);
AnnaBridge 188:bcfe06ba3d64 90 }
AnnaBridge 188:bcfe06ba3d64 91
AnnaBridge 188:bcfe06ba3d64 92 void gpio_dir(gpio_t *obj, PinDirection direction)
AnnaBridge 188:bcfe06ba3d64 93 {
AnnaBridge 188:bcfe06ba3d64 94 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 95 MBED_ASSERT(obj->pin != NC);
AnnaBridge 188:bcfe06ba3d64 96
AnnaBridge 188:bcfe06ba3d64 97 obj->dir = direction;
AnnaBridge 188:bcfe06ba3d64 98 gpio_set_dir_mode(obj);
AnnaBridge 188:bcfe06ba3d64 99 }