mirror of https://github.com/ARMmbed/mbed-os.git
63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "mbed_assert.h"
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#include "pinmap.h"
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#include "mbed_error.h"
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#include "fsl_port.h"
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/* Array of PORT peripheral base address. */
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static PORT_Type *const port_addrs[] = PORT_BASE_PTRS;
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void pin_function(PinName pin, int function)
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{
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MBED_ASSERT(pin != (PinName)NC);
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clock_ip_name_t port_clocks[] = PORT_CLOCKS;
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CLOCK_EnableClock(port_clocks[pin >> GPIO_PORT_SHIFT]);
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PORT_SetPinMux(port_addrs[pin >> GPIO_PORT_SHIFT], pin & 0xFF, (port_mux_t)function);
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}
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void pin_mode(PinName pin, PinMode mode)
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{
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MBED_ASSERT(pin != (PinName)NC);
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uint32_t instance = pin >> GPIO_PORT_SHIFT;
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uint32_t pinName = pin & 0xFF;
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PORT_Type *base = port_addrs[instance];
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uint32_t reg = base->PCR[pinName];
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switch (mode) {
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case PullNone:
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/* Write 0 to the PE, PS and ISF bits */
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reg &= ~(PORT_PCR_PE_MASK | PORT_PCR_PS_MASK | PORT_PCR_ISF_MASK);
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break;
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case PullDown:
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/* Write 0 to PS and ISF bits and 1 to the PE bit to enable the pull configuration */
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reg &= ~(PORT_PCR_PS_MASK | PORT_PCR_ISF_MASK);
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reg |= PORT_PCR_PE_MASK;
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break;
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case PullUp:
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/* Write 0 ISF bit, 1 to the PE & PS bits to enable the pull up configuration */
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reg &= ~(PORT_PCR_ISF_MASK);
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reg |= (PORT_PCR_PE_MASK | PORT_PCR_PS_MASK);
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break;
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default:
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break;
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}
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base->PCR[pinName] = reg;
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}
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