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/port_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 "port_api.h"
AnnaBridge 188:bcfe06ba3d64 25 #include "psoc6_utils.h"
AnnaBridge 188:bcfe06ba3d64 26 #include "mbed_error.h"
AnnaBridge 188:bcfe06ba3d64 27
AnnaBridge 188:bcfe06ba3d64 28 static void port_init_pins(port_t *obj)
AnnaBridge 188:bcfe06ba3d64 29 {
AnnaBridge 188:bcfe06ba3d64 30 uint32_t pin;
AnnaBridge 188:bcfe06ba3d64 31 uint32_t cy_mode;
AnnaBridge 188:bcfe06ba3d64 32
AnnaBridge 188:bcfe06ba3d64 33 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 34 MBED_ASSERT(obj->port);
AnnaBridge 188:bcfe06ba3d64 35
AnnaBridge 188:bcfe06ba3d64 36 cy_mode = gpio_get_cy_drive_mode(obj->direction, obj->mode);
AnnaBridge 188:bcfe06ba3d64 37 for (pin = 0; pin < 8; ++pin) {
AnnaBridge 188:bcfe06ba3d64 38 if (obj->mask & (1 << pin)) {
AnnaBridge 188:bcfe06ba3d64 39 Cy_GPIO_Pin_FastInit(obj->port, pin, cy_mode, 0, HSIOM_SEL_GPIO);
AnnaBridge 188:bcfe06ba3d64 40 }
AnnaBridge 188:bcfe06ba3d64 41 }
AnnaBridge 188:bcfe06ba3d64 42
AnnaBridge 188:bcfe06ba3d64 43 // Force output to enable pulls.
AnnaBridge 188:bcfe06ba3d64 44 if (obj->direction == PIN_INPUT) {
AnnaBridge 188:bcfe06ba3d64 45 switch (cy_mode) {
AnnaBridge 188:bcfe06ba3d64 46 case CY_GPIO_DM_PULLUP:
AnnaBridge 188:bcfe06ba3d64 47 port_write(obj, 0xff);
AnnaBridge 188:bcfe06ba3d64 48 break; // Force output to enable pulls.
AnnaBridge 188:bcfe06ba3d64 49
AnnaBridge 188:bcfe06ba3d64 50 case CY_GPIO_DM_PULLDOWN:
AnnaBridge 188:bcfe06ba3d64 51 port_write(obj, 0);
AnnaBridge 188:bcfe06ba3d64 52 break;
AnnaBridge 188:bcfe06ba3d64 53 }
AnnaBridge 188:bcfe06ba3d64 54 }
AnnaBridge 188:bcfe06ba3d64 55 }
AnnaBridge 188:bcfe06ba3d64 56
AnnaBridge 188:bcfe06ba3d64 57 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
AnnaBridge 188:bcfe06ba3d64 58 {
AnnaBridge 188:bcfe06ba3d64 59 uint32_t pin;
AnnaBridge 188:bcfe06ba3d64 60
AnnaBridge 188:bcfe06ba3d64 61 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 62
AnnaBridge 188:bcfe06ba3d64 63 for (pin = 0; pin < 8; ++pin) {
AnnaBridge 188:bcfe06ba3d64 64 if (mask & (1 << pin)) {
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 189:f392fc9709a3 69 (void) cy_reserve_io_pin((PinName)((port << 8) + pin));
AnnaBridge 188:bcfe06ba3d64 70 }
AnnaBridge 188:bcfe06ba3d64 71 }
AnnaBridge 188:bcfe06ba3d64 72 obj->port_id = port;
AnnaBridge 188:bcfe06ba3d64 73 obj->port = Cy_GPIO_PortToAddr(port);
AnnaBridge 188:bcfe06ba3d64 74 obj->mask = mask & 0xff; // Only 8 bits exist on a port in PSoC.
AnnaBridge 188:bcfe06ba3d64 75 obj->direction = dir;
AnnaBridge 188:bcfe06ba3d64 76 obj->mode = PullDefault;
AnnaBridge 188:bcfe06ba3d64 77 port_init_pins(obj);
AnnaBridge 188:bcfe06ba3d64 78 }
AnnaBridge 188:bcfe06ba3d64 79
AnnaBridge 188:bcfe06ba3d64 80 void port_mode(port_t *obj, PinMode mode)
AnnaBridge 188:bcfe06ba3d64 81 {
AnnaBridge 188:bcfe06ba3d64 82 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 83 MBED_ASSERT(obj->port);
AnnaBridge 188:bcfe06ba3d64 84
AnnaBridge 188:bcfe06ba3d64 85 obj->mode = mode;
AnnaBridge 188:bcfe06ba3d64 86 port_init_pins(obj);
AnnaBridge 188:bcfe06ba3d64 87 }
AnnaBridge 188:bcfe06ba3d64 88
AnnaBridge 188:bcfe06ba3d64 89 void port_dir(port_t *obj, PinDirection dir)
AnnaBridge 188:bcfe06ba3d64 90 {
AnnaBridge 188:bcfe06ba3d64 91 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 92 MBED_ASSERT(obj->port);
AnnaBridge 188:bcfe06ba3d64 93
AnnaBridge 188:bcfe06ba3d64 94 obj->direction = dir;
AnnaBridge 188:bcfe06ba3d64 95 port_init_pins(obj);
AnnaBridge 188:bcfe06ba3d64 96 }
AnnaBridge 188:bcfe06ba3d64 97
AnnaBridge 188:bcfe06ba3d64 98 void port_write(port_t *obj, int value)
AnnaBridge 188:bcfe06ba3d64 99 {
AnnaBridge 188:bcfe06ba3d64 100 MBED_ASSERT(obj);
AnnaBridge 188:bcfe06ba3d64 101 MBED_ASSERT(obj->port);
AnnaBridge 188:bcfe06ba3d64 102
AnnaBridge 188:bcfe06ba3d64 103 if (obj->mask == 0xff) {
AnnaBridge 188:bcfe06ba3d64 104 obj->port->OUT = value;
AnnaBridge 188:bcfe06ba3d64 105 } else {
AnnaBridge 188:bcfe06ba3d64 106 // In case some bits are used for different functionality we need to write
AnnaBridge 188:bcfe06ba3d64 107 // each bit separately to not break things out, eg. pull up state on other bits.
AnnaBridge 188:bcfe06ba3d64 108 uint32_t pin;
AnnaBridge 188:bcfe06ba3d64 109 for (pin = 0; pin < 8; ++pin) {
AnnaBridge 188:bcfe06ba3d64 110 if (obj->mask & (1 << pin)) {
AnnaBridge 188:bcfe06ba3d64 111 Cy_GPIO_Write(obj->port, pin, value & 0x1);
AnnaBridge 188:bcfe06ba3d64 112 value >>= 1;
AnnaBridge 188:bcfe06ba3d64 113 }
AnnaBridge 188:bcfe06ba3d64 114 }
AnnaBridge 188:bcfe06ba3d64 115 }
AnnaBridge 188:bcfe06ba3d64 116 }
AnnaBridge 188:bcfe06ba3d64 117
AnnaBridge 188:bcfe06ba3d64 118 int port_read(port_t *obj)
AnnaBridge 188:bcfe06ba3d64 119 {
AnnaBridge 188:bcfe06ba3d64 120 return obj->port->IN & obj->mask;
AnnaBridge 188:bcfe06ba3d64 121 }