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Diff: targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/port_api.c
- Revision:
- 15:a81a8d6c1dfe
- Child:
- 18:da299f395b9e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/port_api.c Wed Nov 04 16:30:11 2015 +0000 @@ -0,0 +1,176 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2015 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "port_api.h" +#include "pinmap.h" +#include "gpio_api.h" +#include "port.h" + +#if defined(TARGET_SAMR21G18A) +#define PORTA_MASK 0xDBDFFFF3 // mask for available pins in Port A +#define PORTB_MASK 0xC0C3C30D // mask for available pins in Port B +#define PORTC_MASK 0x000D0000 // mask for available pins in Port C +#elif defined(TARGET_SAMD21J18A) +#define PORTA_MASK 0xDBFFFFFF // mask for available pins in Port A +#define PORTB_MASK 0xC0C3FFFF // mask for available pins in Port B +#elif defined(TARGET_SAMD21G18A) +#define PORTA_MASK 0xDBFFFFFF // mask for available pins in Port A +#define PORTB_MASK 0x00C00F0C // mask for available pins in Port B +#else +#endif + +uint32_t start_pin(PortName port) +{ + if(port < PortMax) { /* PortC value is 2*/ + return port * 32; + } else { + return NC; + } +} +void port_init(port_t *obj, PortName port, int mask, PinDirection dir) +{ + MBED_ASSERT(obj); + struct port_config pin_conf; + int i, j; + int start; + + port_get_config_defaults(&pin_conf); + switch (dir) { + case PIN_INPUT : + pin_conf.direction = PORT_PIN_DIR_INPUT; + break; + case PIN_OUTPUT: + pin_conf.direction = PORT_PIN_DIR_OUTPUT; + break; + case PIN_INPUT_OUTPUT: + pin_conf.direction = PORT_PIN_DIR_OUTPUT_WTH_READBACK; + break; + default: + return; + } + + PortGroup *const port_base = (PortGroup*)port_get_group_from_gpio_pin(port * 32); // 32 pins in port // function reused to get the port base + if(port_base == NULL) return; /* returns NULL if invalid*/ + switch (port) { + case PortA: + obj->mask = (uint32_t)mask & PORTA_MASK; + break; + case PortB: + obj->mask = (uint32_t)mask & PORTB_MASK; + break; +#if defined(TARGET_SAMR21G18A) + case PortC: + obj->mask = (uint32_t)mask & PORTC_MASK; + break; +#endif + default: + return; + } + start = start_pin(port); + if(start == NC) + return; + obj->port = port; + obj->direction = dir; + obj->powersave = pin_conf.powersave; + obj->mode = PORT_PIN_PULL_UP; + + for (i = start, j = 0; j < 32; i++, j++) { + if (obj->mask & (1<<j)) { + port_pin_set_config((PinName)i, &pin_conf); + } + } + obj->OUTCLR = &port_base->OUTCLR.reg; + obj->OUTSET = &port_base->OUTSET.reg; + obj->IN = &port_base->IN.reg; + obj->OUT = &port_base->OUT.reg; +} + +void port_mode(port_t *obj, PinMode mode) +{ + MBED_ASSERT(obj); + int i, j; + int start; + start = start_pin(obj->port); + if(start == NC) + return; + for (i = start, j = 0; j < 32; i++, j++) { + if (obj->mask & (1<<j)) { + pin_mode((PinName)i , mode); + } + } +} + +void port_dir(port_t *obj, PinDirection dir) +{ + MBED_ASSERT(obj); + struct port_config pin_conf; + int i, j; + int start; + + switch (dir) { + case PIN_INPUT : + pin_conf.direction = PORT_PIN_DIR_INPUT; + break; + case PIN_OUTPUT: + pin_conf.direction = PORT_PIN_DIR_OUTPUT; + break; + case PIN_INPUT_OUTPUT: + pin_conf.direction = PORT_PIN_DIR_OUTPUT_WTH_READBACK; + break; + default: + return; + } + start = start_pin(obj->port); + if(start == NC) + return; + obj->direction = dir; + pin_conf.input_pull = obj->mode; + pin_conf.powersave = obj->powersave; + + for (i = start, j = 0; j < 32; i++, j++) { + if (obj->mask & (1<<j)) { + port_pin_set_config((PinName)i, &pin_conf); + } + } +} + +void port_write(port_t *obj, int value) +{ + MBED_ASSERT(obj); + int i; + int start; + start = start_pin(obj->port); + if(start == NC) + return; + for (i = 0; i < 32 ; i++) { + if (obj->mask & (1<<i)) { + if (value & (1<<i)) { + *obj->OUTSET = 1 << i; + } else { + *obj->OUTCLR = 1 << i; + } + } + } +} + +int port_read(port_t *obj) +{ + MBED_ASSERT(obj); + if (obj->direction == PIN_OUTPUT) { + return (*obj->OUT & obj->mask); + } else { + return (*obj->IN & obj->mask); + } +}