added prescaler for 16 bit pwm in LPC1347 target
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Diff: targets/hal/TARGET_Freescale/TARGET_K20XX/port_api.c
- Revision:
- 0:9b334a45a8ff
- Child:
- 144:ef7eb2e8f9f7
diff -r 000000000000 -r 9b334a45a8ff targets/hal/TARGET_Freescale/TARGET_K20XX/port_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_Freescale/TARGET_K20XX/port_api.c Thu Oct 01 15:25:22 2015 +0300 @@ -0,0 +1,72 @@ +/* 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" + +PinName port_pin(PortName port, int pin_n) { + return (PinName)((port << PORT_SHIFT) | (pin_n << 2)); +} + +void port_init(port_t *obj, PortName port, int mask, PinDirection dir) { + obj->port = port; + obj->mask = mask; + + GPIO_Type *reg = (GPIO_Type *)(PTA_BASE + port * 0x40); + + obj->reg_out = ®->PDOR; + obj->reg_in = ®->PDIR; + obj->reg_dir = ®->PDDR; + + uint32_t i; + // The function is set per pin: reuse gpio logic + for (i=0; i<32; i++) { + if (obj->mask & (1<<i)) { + gpio_set(port_pin(obj->port, i)); + } + } + + port_dir(obj, dir); +} + +void port_mode(port_t *obj, PinMode mode) { + uint32_t i; + // The mode is set per pin: reuse pinmap logic + for (i=0; i<32; i++) { + if (obj->mask & (1<<i)) { + pin_mode(port_pin(obj->port, i), mode); + } + } +} + +void port_dir(port_t *obj, PinDirection dir) { + switch (dir) { + case PIN_INPUT : + *obj->reg_dir &= ~obj->mask; + break; + case PIN_OUTPUT: + *obj->reg_dir |= obj->mask; + break; + } +} + +void port_write(port_t *obj, int value) { + *obj->reg_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask); +} + +int port_read(port_t *obj) { + return (*obj->reg_in & obj->mask); +}