1 /*
2 * @brief LPC15xx Switch Matrix driver
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2013
6 * All rights reserved.
7 *
8 * @par
9 * Software that is described herein is for illustrative purposes only
10 * which provides customers with programming information regarding the
11 * LPC products. This software is supplied "AS IS" without any warranties of
12 * any kind, and NXP Semiconductors and its licenser disclaim any and
13 * all warranties, express or implied, including all implied warranties of
14 * merchantability, fitness for a particular purpose and non-infringement of
15 * intellectual property rights. NXP Semiconductors assumes no responsibility
16 * or liability for the use of the software, conveys no license or rights under any
17 * patent, copyright, mask work right, or any other intellectual property rights in
18 * or to any products. NXP Semiconductors reserves the right to make changes
19 * in the software without notification. NXP Semiconductors also makes no
20 * representation or warranty that such application will be suitable for the
21 * specified use without further testing or modification.
22 *
23 * @par
24 * Permission to use, copy, modify, and distribute this software and its
25 * documentation is hereby granted, under NXP Semiconductors' and its
26 * licensor's relevant copyrights in the software, without fee, provided that it
27 * is used in conjunction with NXP Semiconductors microcontrollers. This
28 * copyright, permission, and disclaimer notice must appear in all copies of
29 * this code.
30 */
31
32 #include "chip.h"
33
34 /*****************************************************************************
35 * Private types/enumerations/variables
36 ****************************************************************************/
37
38 #define PINASSIGN_IDX(movable) (((movable) >> 4))
39 #define PINSHIFT(movable) (8 * ((movable) & (0xF)))
40
41 /*****************************************************************************
42 * Public types/enumerations/variables
43 ****************************************************************************/
44
45 /*****************************************************************************
46 * Private functions
47 ****************************************************************************/
48
49 /*****************************************************************************
50 * Public functions
51 ****************************************************************************/
52
53 /* Assign movable pin function to physical pin in Switch Matrix */
Chip_SWM_MovablePinAssign(CHIP_SWM_PIN_MOVABLE_T movable,uint8_t pin)54 void Chip_SWM_MovablePinAssign(CHIP_SWM_PIN_MOVABLE_T movable, uint8_t pin)
55 {
56 uint32_t temp;
57 int pinshift = PINSHIFT(movable), regIndex = PINASSIGN_IDX(movable);
58
59 temp = LPC_SWM->PINASSIGN[regIndex] & (~(0xFF << pinshift));
60 LPC_SWM->PINASSIGN[regIndex] = temp | (pin << pinshift);
61 }
62
63 /* Enables a fixed function pin in the Switch Matrix */
Chip_SWM_EnableFixedPin(CHIP_SWM_PIN_FIXED_T pin)64 void Chip_SWM_EnableFixedPin(CHIP_SWM_PIN_FIXED_T pin)
65 {
66 uint32_t regOff, pinPos;
67
68 pinPos = ((uint32_t) pin) & 0x1F;
69 regOff = ((uint32_t) pin) >> 7;
70
71 /* Set low to enable fixed pin */
72 LPC_SWM->PINENABLE[regOff] &= ~(1 << pinPos);
73 }
74
75 /* Disables a fixed function pin in the Switch Matrix */
Chip_SWM_DisableFixedPin(CHIP_SWM_PIN_FIXED_T pin)76 void Chip_SWM_DisableFixedPin(CHIP_SWM_PIN_FIXED_T pin)
77 {
78 uint32_t regOff, pinPos;
79
80 pinPos = ((uint32_t) pin) & 0x1F;
81 regOff = ((uint32_t) pin) >> 7;
82
83 /* Set low to enable fixed pin */
84 LPC_SWM->PINENABLE[regOff] |= (1 << pinPos);
85 }
86
87 /* Enables or disables a fixed function pin in the Switch Matrix */
Chip_SWM_FixedPinEnable(CHIP_SWM_PIN_FIXED_T pin,bool enable)88 void Chip_SWM_FixedPinEnable(CHIP_SWM_PIN_FIXED_T pin, bool enable)
89 {
90 if (enable) {
91 Chip_SWM_EnableFixedPin(pin);
92 }
93 else {
94 Chip_SWM_DisableFixedPin(pin);
95 }
96 }
97
98 /* Tests whether a fixed function pin is enabled or disabled in the Switch Matrix */
Chip_SWM_IsFixedPinEnabled(CHIP_SWM_PIN_FIXED_T pin)99 bool Chip_SWM_IsFixedPinEnabled(CHIP_SWM_PIN_FIXED_T pin)
100 {
101 uint32_t regOff, pinPos;
102
103 pinPos = ((uint32_t) pin) & 0x1F;
104 regOff = ((uint32_t) pin) >> 7;
105
106 return (bool) ((LPC_SWM->PINENABLE[regOff] & (1 << pinPos)) == 0);
107 }
108