Kev Mann / mbed-dev-OS5_10_4

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targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/api/pinmap.c@2:7aab896b1a3b, 2019-03-13 (annotated)

Committer:
kevman
Date:
Wed Mar 13 11:03:24 2019 +0000
Revision:
2:7aab896b1a3b
Parent:
0:38ceb79fef03 
2019-03-13

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /* mbed Microcontroller Library
kevman 0:38ceb79fef03 2 * Copyright (c) 2006-2013 ARM Limited
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Licensed under the Apache License, Version 2.0 (the "License");
kevman 0:38ceb79fef03 5 * you may not use this file except in compliance with the License.
kevman 0:38ceb79fef03 6 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 7 *
kevman 0:38ceb79fef03 8 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 9 *
kevman 0:38ceb79fef03 10 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 11 * distributed under the License is distributed on an "AS IS" BASIS,
kevman 0:38ceb79fef03 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 13 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 14 * limitations under the License.
kevman 0:38ceb79fef03 15 */
kevman 0:38ceb79fef03 16 #include "mbed_assert.h"
kevman 0:38ceb79fef03 17 #include "pinmap.h"
kevman 0:38ceb79fef03 18 #include "mbed_error.h"
kevman 0:38ceb79fef03 19 #include "fsl_port.h"
kevman 0:38ceb79fef03 20
kevman 0:38ceb79fef03 21 /* Array of PORT peripheral base address. */
kevman 0:38ceb79fef03 22 static PORT_Type *const port_addrs[] = PORT_BASE_PTRS;
kevman 0:38ceb79fef03 23
kevman 0:38ceb79fef03 24 void pin_function(PinName pin, int function)
kevman 0:38ceb79fef03 25 {
kevman 0:38ceb79fef03 26 MBED_ASSERT(pin != (PinName)NC);
kevman 0:38ceb79fef03 27 clock_ip_name_t port_clocks[] = PORT_CLOCKS;
kevman 0:38ceb79fef03 28
kevman 0:38ceb79fef03 29 CLOCK_EnableClock(port_clocks[pin >> GPIO_PORT_SHIFT]);
kevman 0:38ceb79fef03 30
kevman 0:38ceb79fef03 31 PORT_SetPinMux(port_addrs[pin >> GPIO_PORT_SHIFT], pin & 0xFF, (port_mux_t)function);
kevman 0:38ceb79fef03 32 }
kevman 0:38ceb79fef03 33
kevman 0:38ceb79fef03 34 void pin_mode(PinName pin, PinMode mode)
kevman 0:38ceb79fef03 35 {
kevman 0:38ceb79fef03 36 MBED_ASSERT(pin != (PinName)NC);
kevman 0:38ceb79fef03 37 uint32_t instance = pin >> GPIO_PORT_SHIFT;
kevman 0:38ceb79fef03 38 uint32_t pinName = pin & 0xFF;
kevman 0:38ceb79fef03 39 PORT_Type *base = port_addrs[instance];
kevman 0:38ceb79fef03 40 uint32_t reg = base->PCR[pinName];
kevman 0:38ceb79fef03 41
kevman 0:38ceb79fef03 42 switch (mode) {
kevman 0:38ceb79fef03 43 case PullNone:
kevman 0:38ceb79fef03 44 /* Write 0 to the PE, PS and ISF bits */
kevman 0:38ceb79fef03 45 reg &= ~(PORT_PCR_PE_MASK | PORT_PCR_PS_MASK | PORT_PCR_ISF_MASK);
kevman 0:38ceb79fef03 46 break;
kevman 0:38ceb79fef03 47 case PullDown:
kevman 0:38ceb79fef03 48 /* Write 0 to PS and ISF bits and 1 to the PE bit to enable the pull configuration */
kevman 0:38ceb79fef03 49 reg &= ~(PORT_PCR_PS_MASK | PORT_PCR_ISF_MASK);
kevman 0:38ceb79fef03 50 reg |= PORT_PCR_PE_MASK;
kevman 0:38ceb79fef03 51 break;
kevman 0:38ceb79fef03 52 case PullUp:
kevman 0:38ceb79fef03 53 /* Write 0 ISF bit, 1 to the PE & PS bits to enable the pull up configuration */
kevman 0:38ceb79fef03 54 reg &= ~(PORT_PCR_ISF_MASK);
kevman 0:38ceb79fef03 55 reg |= (PORT_PCR_PE_MASK | PORT_PCR_PS_MASK);
kevman 0:38ceb79fef03 56 break;
kevman 0:38ceb79fef03 57 default:
kevman 0:38ceb79fef03 58 break;
kevman 0:38ceb79fef03 59 }
kevman 0:38ceb79fef03 60
kevman 0:38ceb79fef03 61 base->PCR[pinName] = reg;
kevman 0:38ceb79fef03 62 }