shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC43XX/port_api.c@318:bad45627264e, 2014-09-11 (annotated)

Committer:
mbed_official
Date:
Thu Sep 11 16:30:07 2014 +0100
Revision:
318:bad45627264e
Parent:
294:78f9587bb26d 
Synchronized with git revision ce5e32074e750915f89e5daaf73480d07185ef1e



Full URL: https://github.com/mbedmicro/mbed/commit/ce5e32074e750915f89e5daaf73480d07185ef1e/



LPC4330_M4 Fix I2C0 Init

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 20:4263a77256ae 1 /* mbed Microcontroller Library
bogdanm 20:4263a77256ae 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 20:4263a77256ae 3 *
bogdanm 20:4263a77256ae 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 20:4263a77256ae 5 * you may not use this file except in compliance with the License.
bogdanm 20:4263a77256ae 6 * You may obtain a copy of the License at
bogdanm 20:4263a77256ae 7 *
bogdanm 20:4263a77256ae 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 20:4263a77256ae 9 *
bogdanm 20:4263a77256ae 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 20:4263a77256ae 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 20:4263a77256ae 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 20:4263a77256ae 13 * See the License for the specific language governing permissions and
bogdanm 20:4263a77256ae 14 * limitations under the License.
bogdanm 20:4263a77256ae 15 *
bogdanm 20:4263a77256ae 16 * Ported to NXP LPC43XX by Micromint USA <support@micromint.com>
bogdanm 20:4263a77256ae 17 */
mbed_official 294:78f9587bb26d 18 #include "mbed_assert.h"
bogdanm 20:4263a77256ae 19 #include "port_api.h"
bogdanm 20:4263a77256ae 20 #include "pinmap.h"
bogdanm 20:4263a77256ae 21 #include "gpio_api.h"
bogdanm 20:4263a77256ae 22
mbed_official 294:78f9587bb26d 23 // Lookup table to determine SCU offset for GPIO [port][pin]
mbed_official 294:78f9587bb26d 24 // Supports eight 16-bit ports to limit table size
mbed_official 294:78f9587bb26d 25 #define _SO(MBED_PIN) (MBED_PIN >> 18)
mbed_official 294:78f9587bb26d 26
mbed_official 294:78f9587bb26d 27 static const uint8_t _scu_off[][16] =
mbed_official 294:78f9587bb26d 28 { // GPIO0 to GPIO3
mbed_official 294:78f9587bb26d 29 { _SO(GPIO0_0), _SO(GPIO0_1), _SO(GPIO0_2), _SO(GPIO0_3),
mbed_official 294:78f9587bb26d 30 _SO(GPIO0_4), _SO(GPIO0_5), _SO(GPIO0_6), _SO(GPIO0_7),
mbed_official 294:78f9587bb26d 31 _SO(GPIO0_8), _SO(GPIO0_9), _SO(GPIO0_10), _SO(GPIO0_11),
mbed_official 294:78f9587bb26d 32 _SO(GPIO0_12), _SO(GPIO0_13), _SO(GPIO0_14), _SO(GPIO0_15)
mbed_official 294:78f9587bb26d 33 },
mbed_official 294:78f9587bb26d 34 { _SO(GPIO1_0), _SO(GPIO1_1), _SO(GPIO1_2), _SO(GPIO1_3),
mbed_official 294:78f9587bb26d 35 _SO(GPIO1_4), _SO(GPIO1_5), _SO(GPIO1_6), _SO(GPIO1_7),
mbed_official 294:78f9587bb26d 36 _SO(GPIO1_8), _SO(GPIO1_9), _SO(GPIO1_10), _SO(GPIO1_11),
mbed_official 294:78f9587bb26d 37 _SO(GPIO1_12), _SO(GPIO1_13), _SO(GPIO1_14), _SO(GPIO1_15)
mbed_official 294:78f9587bb26d 38 },
mbed_official 294:78f9587bb26d 39 { _SO(GPIO2_0), _SO(GPIO2_1), _SO(GPIO2_2), _SO(GPIO2_3),
mbed_official 294:78f9587bb26d 40 _SO(GPIO2_4), _SO(GPIO2_5), _SO(GPIO2_6), _SO(GPIO2_7),
mbed_official 294:78f9587bb26d 41 _SO(GPIO2_8), _SO(GPIO2_9), _SO(GPIO2_10), _SO(GPIO2_11),
mbed_official 294:78f9587bb26d 42 _SO(GPIO2_12), _SO(GPIO2_13), _SO(GPIO2_14), _SO(GPIO2_15)
mbed_official 294:78f9587bb26d 43 },
mbed_official 294:78f9587bb26d 44 { _SO(GPIO3_0), _SO(GPIO3_1), _SO(GPIO3_2), _SO(GPIO3_3),
mbed_official 294:78f9587bb26d 45 _SO(GPIO3_4), _SO(GPIO3_5), _SO(GPIO3_6), _SO(GPIO3_7),
mbed_official 294:78f9587bb26d 46 _SO(GPIO3_8), _SO(GPIO3_9), _SO(GPIO3_10), _SO(GPIO3_11),
mbed_official 294:78f9587bb26d 47 _SO(GPIO3_12), _SO(GPIO3_13), _SO(GPIO3_14), _SO(GPIO3_15)
mbed_official 294:78f9587bb26d 48 },
mbed_official 294:78f9587bb26d 49 };
mbed_official 294:78f9587bb26d 50
mbed_official 294:78f9587bb26d 51 // Use alternate encoding for ports 4 to 7 so lookup stays within uint8
mbed_official 294:78f9587bb26d 52 #define _S2(MBED_PIN) (((MBED_PIN >> 19) & 0xf0) | ((MBED_PIN >> 18) & 0x0f))
mbed_official 294:78f9587bb26d 53
mbed_official 294:78f9587bb26d 54 static const uint8_t _scu_off2[][16] =
mbed_official 294:78f9587bb26d 55 { // GPIO4 to GPIO7
mbed_official 294:78f9587bb26d 56 { _S2(GPIO4_0), _S2(GPIO4_1), _S2(GPIO4_2), _S2(GPIO4_3),
mbed_official 294:78f9587bb26d 57 _S2(GPIO4_4), _S2(GPIO4_5), _S2(GPIO4_6), _S2(GPIO4_7),
mbed_official 294:78f9587bb26d 58 _S2(GPIO4_8), _S2(GPIO4_9), _S2(GPIO4_10), _S2(GPIO4_11),
mbed_official 294:78f9587bb26d 59 _S2(GPIO4_12), _S2(GPIO4_13), _S2(GPIO4_14), _S2(GPIO4_15)
mbed_official 294:78f9587bb26d 60 },
mbed_official 294:78f9587bb26d 61 { _S2(GPIO5_0), _S2(GPIO5_1), _S2(GPIO5_2), _S2(GPIO5_3),
mbed_official 294:78f9587bb26d 62 _S2(GPIO5_4), _S2(GPIO5_5), _S2(GPIO5_6), _S2(GPIO5_7),
mbed_official 294:78f9587bb26d 63 _S2(GPIO5_8), _S2(GPIO5_9), _S2(GPIO5_10), _S2(GPIO5_11),
mbed_official 294:78f9587bb26d 64 _S2(GPIO5_12), _S2(GPIO5_13), _S2(GPIO5_14), _S2(GPIO5_15)
mbed_official 294:78f9587bb26d 65 },
mbed_official 294:78f9587bb26d 66 { _S2(GPIO6_0), _S2(GPIO6_1), _S2(GPIO6_2), _S2(GPIO6_3),
mbed_official 294:78f9587bb26d 67 _S2(GPIO6_4), _S2(GPIO6_5), _S2(GPIO6_6), _S2(GPIO6_7),
mbed_official 294:78f9587bb26d 68 _S2(GPIO6_8), _S2(GPIO6_9), _S2(GPIO6_10), _S2(GPIO6_11),
mbed_official 294:78f9587bb26d 69 _S2(GPIO6_12), _S2(GPIO6_13), _S2(GPIO6_14), _S2(GPIO6_15)
mbed_official 294:78f9587bb26d 70 },
mbed_official 294:78f9587bb26d 71 { _S2(GPIO7_0), _S2(GPIO7_1), _S2(GPIO7_2), _S2(GPIO7_3),
mbed_official 294:78f9587bb26d 72 _S2(GPIO7_4), _S2(GPIO7_5), _S2(GPIO7_6), _S2(GPIO7_7),
mbed_official 294:78f9587bb26d 73 _S2(GPIO7_8), _S2(GPIO7_9), _S2(GPIO7_10), _S2(GPIO7_11),
mbed_official 294:78f9587bb26d 74 _S2(GPIO7_12), _S2(GPIO7_13), _S2(GPIO7_14), _S2(GPIO7_15)
mbed_official 294:78f9587bb26d 75 },
mbed_official 294:78f9587bb26d 76 };
mbed_official 294:78f9587bb26d 77
bogdanm 20:4263a77256ae 78 PinName port_pin(PortName port, int pin_n) {
mbed_official 294:78f9587bb26d 79 MBED_ASSERT((port <= Port7) && (pin_n < 32));
mbed_official 294:78f9587bb26d 80 int offset = 0;
mbed_official 294:78f9587bb26d 81
mbed_official 294:78f9587bb26d 82 // Lookup table only maps pins 0 to 15
mbed_official 294:78f9587bb26d 83 if (pin_n > 15) {
mbed_official 294:78f9587bb26d 84 return NC;
mbed_official 294:78f9587bb26d 85 }
mbed_official 294:78f9587bb26d 86
mbed_official 294:78f9587bb26d 87 // Lookup SCU offset
mbed_official 294:78f9587bb26d 88 if (port < Port4) {
mbed_official 294:78f9587bb26d 89 offset = _scu_off[port][pin_n];
mbed_official 294:78f9587bb26d 90 } else {
mbed_official 294:78f9587bb26d 91 offset = _scu_off2[port - Port4][pin_n];
mbed_official 294:78f9587bb26d 92 offset = ((offset & 0xf0) << 1) | (offset & 0x0f);
mbed_official 294:78f9587bb26d 93 }
mbed_official 294:78f9587bb26d 94
mbed_official 294:78f9587bb26d 95 // Return pin name
mbed_official 294:78f9587bb26d 96 return (PinName)((offset << 18) | GPIO_OFF(port, pin_n));
bogdanm 20:4263a77256ae 97 }
bogdanm 20:4263a77256ae 98
bogdanm 20:4263a77256ae 99 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
bogdanm 20:4263a77256ae 100 obj->port = port;
bogdanm 20:4263a77256ae 101 obj->mask = mask;
bogdanm 20:4263a77256ae 102
mbed_official 294:78f9587bb26d 103 LPC_GPIO_T *port_reg = (LPC_GPIO_T *)(LPC_GPIO_PORT_BASE);
bogdanm 20:4263a77256ae 104
mbed_official 294:78f9587bb26d 105 // Do not use masking, because it prevents the use of the unmasked pins
mbed_official 318:bad45627264e 106 // port_reg->MASK[port] = ~mask;
bogdanm 20:4263a77256ae 107
bogdanm 20:4263a77256ae 108 obj->reg_out = &port_reg->PIN[port];
bogdanm 20:4263a77256ae 109 obj->reg_in = &port_reg->PIN[port];
bogdanm 20:4263a77256ae 110 obj->reg_dir = &port_reg->DIR[port];
bogdanm 20:4263a77256ae 111
bogdanm 20:4263a77256ae 112 uint32_t i;
bogdanm 20:4263a77256ae 113 // The function is set per pin: reuse gpio logic
bogdanm 20:4263a77256ae 114 for (i=0; i<32; i++) {
bogdanm 20:4263a77256ae 115 if (obj->mask & (1<<i)) {
bogdanm 20:4263a77256ae 116 gpio_set(port_pin(obj->port, i));
bogdanm 20:4263a77256ae 117 }
bogdanm 20:4263a77256ae 118 }
mbed_official 294:78f9587bb26d 119
bogdanm 20:4263a77256ae 120 port_dir(obj, dir);
bogdanm 20:4263a77256ae 121 }
bogdanm 20:4263a77256ae 122
bogdanm 20:4263a77256ae 123 void port_mode(port_t *obj, PinMode mode) {
bogdanm 20:4263a77256ae 124 uint32_t i;
bogdanm 20:4263a77256ae 125 // The mode is set per pin: reuse pinmap logic
bogdanm 20:4263a77256ae 126 for (i=0; i<32; i++) {
bogdanm 20:4263a77256ae 127 if (obj->mask & (1<<i)) {
bogdanm 20:4263a77256ae 128 pin_mode(port_pin(obj->port, i), mode);
bogdanm 20:4263a77256ae 129 }
bogdanm 20:4263a77256ae 130 }
bogdanm 20:4263a77256ae 131 }
bogdanm 20:4263a77256ae 132
bogdanm 20:4263a77256ae 133 void port_dir(port_t *obj, PinDirection dir) {
bogdanm 20:4263a77256ae 134 switch (dir) {
bogdanm 20:4263a77256ae 135 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
bogdanm 20:4263a77256ae 136 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
bogdanm 20:4263a77256ae 137 }
bogdanm 20:4263a77256ae 138 }
bogdanm 20:4263a77256ae 139
bogdanm 20:4263a77256ae 140 void port_write(port_t *obj, int value) {
bogdanm 20:4263a77256ae 141 *obj->reg_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask);
bogdanm 20:4263a77256ae 142 }
bogdanm 20:4263a77256ae 143
bogdanm 20:4263a77256ae 144 int port_read(port_t *obj) {
bogdanm 20:4263a77256ae 145 return (*obj->reg_in & obj->mask);
bogdanm 20:4263a77256ae 146 }