Contiki-NG
CC2650STK_fxns.c
1 /*
2  * Copyright (c) 2018-2019, Texas Instruments Incorporated
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * * Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  *
12  * * Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in the
14  * documentation and/or other materials provided with the distribution.
15  *
16  * * Neither the name of Texas Instruments Incorporated nor the names of
17  * its contributors may be used to endorse or promote products derived
18  * from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 /*
33  * ====================== CC2650STK_fxns.c =========================================
34  * This file contains the board-specific initialization functions.
35  */
36 
37 #include <stdbool.h>
38 #include <stddef.h>
39 #include <stdint.h>
40 
41 #include <ti/devices/DeviceFamily.h>
42 #include DeviceFamily_constructPath(driverlib/ioc.h)
43 #include DeviceFamily_constructPath(driverlib/cpu.h)
44 
45 #include <ti/drivers/Board.h>
46 
47 #include "Board.h"
48 
49 
50 /*
51  * ======== CC2650STK_sendExtFlashByte ========
52  */
53 void CC2650STK_sendExtFlashByte(PIN_Handle pinHandle, uint8_t byte)
54 {
55  uint8_t i;
56 
57  /* SPI Flash CS */
58  PIN_setOutputValue(pinHandle, IOID_14, 0);
59 
60  for (i = 0; i < 8; i++) {
61  PIN_setOutputValue(pinHandle, IOID_17, 0); /* SPI Flash CLK */
62 
63  /* SPI Flash MOSI */
64  PIN_setOutputValue(pinHandle, IOID_19, (byte >> (7 - i)) & 0x01);
65  PIN_setOutputValue(pinHandle, IOID_17, 1);
66 
67  /*
68  * Waste a few cycles to keep the CLK high for at
69  * least 45% of the period.
70  * 3 cycles per loop: 8 loops @ 48 Mhz = 0.5 us.
71  */
72  CPUdelay(8);
73  }
74 
75  PIN_setOutputValue(pinHandle, IOID_17, 0);
76  PIN_setOutputValue(pinHandle, IOID_14, 1);
77 
78  /*
79  * Keep CS high at least 40 us
80  * 3 cycles per loop: 700 loops @ 48 Mhz ~= 44 us
81  */
82  CPUdelay(700);
83 }
84 
85 /*
86  * ======== CC2650STK_wakeUpExtFlash ========
87  */
89 {
90  PIN_Config extFlashPinTable[] = {
91  IOID_14 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL |
92  PIN_INPUT_DIS | PIN_DRVSTR_MED,
93  PIN_TERMINATE
94  };
95  PIN_State extFlashPinState;
96  PIN_Handle extFlashPinHandle = PIN_open(&extFlashPinState, extFlashPinTable);
97 
98  /*
99  * To wake up we need to toggle the chip select at
100  * least 20 ns and ten wait at least 35 us.
101  */
102 
103  /* Toggle chip select for ~20ns to wake ext. flash */
104  PIN_setOutputValue(extFlashPinHandle, IOID_14, 0);
105  /* 3 cycles per loop: 1 loop @ 48 Mhz ~= 62 ns */
106  CPUdelay(1);
107  PIN_setOutputValue(extFlashPinHandle, IOID_14, 1);
108  /* 3 cycles per loop: 560 loops @ 48 Mhz ~= 35 us */
109  CPUdelay(560);
110 
111  PIN_close(extFlashPinHandle);
112 }
113 
114 /*
115  * ======== CC2650STK_shutDownExtFlash ========
116  */
118 {
119  /*
120  * To be sure we are putting the flash into sleep and not waking it,
121  * we first have to make a wake up call
122  */
124 
125  PIN_Config extFlashPinTable[] = {
126  /* SPI Flash CS*/
127  IOID_14 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL |
128  PIN_INPUT_DIS | PIN_DRVSTR_MED,
129  /* SPI Flash CLK */
130  IOID_17 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL |
131  PIN_INPUT_DIS | PIN_DRVSTR_MED,
132  /* SPI Flash MOSI */
133  IOID_19 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL |
134  PIN_INPUT_DIS | PIN_DRVSTR_MED,
135  /* SPI Flash MISO */
136  IOID_18 | PIN_INPUT_EN | PIN_PULLDOWN,
137  PIN_TERMINATE
138  };
139  PIN_State extFlashPinState;
140  PIN_Handle extFlashPinHandle = PIN_open(&extFlashPinState, extFlashPinTable);
141 
142  uint8_t extFlashShutdown = 0xB9;
143 
144  CC2650STK_sendExtFlashByte(extFlashPinHandle, extFlashShutdown);
145 
146  PIN_close(extFlashPinHandle);
147 }
148 
149 /*
150  * ======== Board_initHook ========
151  * Called by Board_init() to perform board-specific initialization.
152  */
153 void Board_initHook()
154 {
156 }
void CC2650STK_wakeUpExtFlash(void)
Wake up the external flash present on the board files.
void CC2650STK_shutDownExtFlash(void)
Turn off the external flash on LaunchPads.