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?
User | Revision | Line number | New 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 | } |