Contiki-NG
CC1352P_2_LAUNCHXL_fxns.c
1 /*
2  * Copyright (c) 2018, 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 /*
34  * ======== CC1352P_2_LAUNCHXL_fxns.c ========
35  * This file contains the board-specific initialization functions, and
36  * RF callback function for antenna switching.
37  */
38 
39 #include <stdbool.h>
40 #include <stddef.h>
41 #include <stdint.h>
42 
43 #include <ti/devices/DeviceFamily.h>
44 #include DeviceFamily_constructPath(driverlib/ioc.h)
45 #include DeviceFamily_constructPath(driverlib/cpu.h)
46 #include <ti/drivers/rf/RF.h>
47 #include <ti/drivers/pin/PINCC26XX.h>
48 
49 #include "Board.h"
50 
51 /*
52  * ======== CC1352P_2_LAUNCHXL_sendExtFlashByte ========
53  */
54 void CC1352P_2_LAUNCHXL_sendExtFlashByte(PIN_Handle pinHandle, uint8_t byte)
55 {
56  uint8_t i;
57 
58  /* SPI Flash CS */
59  PIN_setOutputValue(pinHandle, IOID_20, 0);
60 
61  for (i = 0; i < 8; i++) {
62  PIN_setOutputValue(pinHandle, IOID_10, 0); /* SPI Flash CLK */
63 
64  /* SPI Flash MOSI */
65  PIN_setOutputValue(pinHandle, IOID_9, (byte >> (7 - i)) & 0x01);
66  PIN_setOutputValue(pinHandle, IOID_10, 1); /* SPI Flash CLK */
67 
68  /*
69  * Waste a few cycles to keep the CLK high for at
70  * least 45% of the period.
71  * 3 cycles per loop: 8 loops @ 48 Mhz = 0.5 us.
72  */
73  CPUdelay(8);
74  }
75 
76  PIN_setOutputValue(pinHandle, IOID_10, 0); /* CLK */
77  PIN_setOutputValue(pinHandle, IOID_20, 1); /* CS */
78 
79  /*
80  * Keep CS high at least 40 us
81  * 3 cycles per loop: 700 loops @ 48 Mhz ~= 44 us
82  */
83  CPUdelay(700);
84 }
85 
86 /*
87  * ======== CC1352P_2_LAUNCHXL_wakeUpExtFlash ========
88  */
90 {
91  PIN_Config extFlashPinTable[] = {
92  /* SPI Flash CS */
93  IOID_20 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL |
94  PIN_INPUT_DIS | PIN_DRVSTR_MED,
95  PIN_TERMINATE
96  };
97  PIN_State extFlashPinState;
98  PIN_Handle extFlashPinHandle = PIN_open(&extFlashPinState, extFlashPinTable);
99 
100  /*
101  * To wake up we need to toggle the chip select at
102  * least 20 ns and ten wait at least 35 us.
103  */
104 
105  /* Toggle chip select for ~20ns to wake ext. flash */
106  PIN_setOutputValue(extFlashPinHandle, IOID_20, 0);
107  /* 3 cycles per loop: 1 loop @ 48 Mhz ~= 62 ns */
108  CPUdelay(1);
109  PIN_setOutputValue(extFlashPinHandle, IOID_20, 1);
110  /* 3 cycles per loop: 560 loops @ 48 Mhz ~= 35 us */
111  CPUdelay(560);
112 
113  PIN_close(extFlashPinHandle);
114 }
115 
116 /*
117  * ======== CC1352P_2_LAUNCHXL_shutDownExtFlash ========
118  */
120 {
121  /* To be sure we are putting the flash into sleep and not waking it, we first have to make a wake up call */
123 
124  PIN_Config extFlashPinTable[] = {
125  /* SPI Flash CS*/
126  IOID_20 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL |
127  PIN_INPUT_DIS | PIN_DRVSTR_MED,
128  /* SPI Flash CLK */
129  IOID_10 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL |
130  PIN_INPUT_DIS | PIN_DRVSTR_MED,
131  /* SPI Flash MOSI */
132  IOID_9 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL |
133  PIN_INPUT_DIS | PIN_DRVSTR_MED,
134  /* SPI Flash MISO */
135  IOID_8 | PIN_INPUT_EN | PIN_PULLDOWN,
136  PIN_TERMINATE
137  };
138  PIN_State extFlashPinState;
139  PIN_Handle extFlashPinHandle = PIN_open(&extFlashPinState, extFlashPinTable);
140 
141  uint8_t extFlashShutdown = 0xB9;
142 
143  CC1352P_2_LAUNCHXL_sendExtFlashByte(extFlashPinHandle, extFlashShutdown);
144 
145  PIN_close(extFlashPinHandle);
146 }
147 
148 /*
149  * For the SysConfig generated Board.h file, Board_RF_SUB1GHZ will not be
150  * defined unless the RF module is added to the configuration. Therefore,
151  * we don't include this code if Board_RF_SUB1GHZ is not defined.
152  */
153 #if defined(Board_RF_SUB1GHZ)
154 
155 /*
156  * ======== Antenna switching ========
157  */
158 static PIN_Handle antennaPins;
159 static PIN_State antennaState;
160 
161 void initAntennaSwitch()
162 {
163  PIN_Config antennaConfig[] = {
164  Board_RF_24GHZ | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX, /* Path disabled */
165  Board_RF_HIGH_PA | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX, /* Path disabled */
166  Board_RF_SUB1GHZ | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX, /* Path disabled */
167  PIN_TERMINATE
168  };
169  antennaPins = PIN_open(&antennaState, antennaConfig);
170 }
171 
172 /*
173  * ======== rfDriverCallback ========
174  * Sets up the antenna switch depending on the current PHY configuration.
175  * Truth table:
176  *
177  * Path DIO28 DIO29 DIO30
178  * =========== ===== ===== =====
179  * Off 0 0 0
180  * Sub-1 GHz 0 0 1
181  * 2.4 GHz 1 0 0
182  * 20 dBm TX 0 1 0
183  */
184 void rfDriverCallback(RF_Handle client, RF_GlobalEvent events, void *arg)
185 {
186  /* Switch off all paths first. Needs to be done anyway in every sub-case below. */
187  PINCC26XX_setOutputValue(Board_RF_24GHZ, 0);
188  PINCC26XX_setOutputValue(Board_RF_HIGH_PA, 0);
189  PINCC26XX_setOutputValue(Board_RF_SUB1GHZ, 0);
190 
191  if (events & RF_GlobalEventRadioSetup) {
192  /* Decode the current PA configuration. */
193  RF_TxPowerTable_PAType paType = (RF_TxPowerTable_PAType)RF_getTxPower(client).paType;
194 
195  /* Decode the generic argument as a setup command. */
196  RF_RadioSetup* setupCommand = (RF_RadioSetup*)arg;
197 
198  if (setupCommand->common.commandNo == CMD_PROP_RADIO_DIV_SETUP) {
199  /* Sub-1 GHz */
200  if (paType == RF_TxPowerTable_HighPA) {
201  /* PA enable --> HIGH PA
202  * LNA enable --> Sub-1 GHz
203  */
204  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_GPIO);
205  // Note: RFC_GPO3 is a work-around because the RFC_GPO1 (PA enable signal) is sometimes not
206  // de-asserted on CC1352 Rev A.
207  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_RFC_GPO3);
208  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_RFC_GPO0);
209  } else {
210  /* RF core active --> Sub-1 GHz */
211  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_GPIO);
212  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_GPIO);
213  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_GPIO);
214  PINCC26XX_setOutputValue(Board_RF_SUB1GHZ, 1);
215  }
216  } else {
217  /* 2.4 GHz */
218  if (paType == RF_TxPowerTable_HighPA)
219  {
220  /* PA enable --> HIGH PA
221  * LNA enable --> 2.4 GHz
222  */
223  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_RFC_GPO0);
224  // Note: RFC_GPO3 is a work-around because the RFC_GPO1 (PA enable signal) is sometimes not
225  // de-asserted on CC1352 Rev A.
226  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_RFC_GPO3);
227  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_GPIO);
228  } else {
229  /* RF core active --> 2.4 GHz */
230  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_GPIO);
231  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_GPIO);
232  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_GPIO);
233  PINCC26XX_setOutputValue(Board_RF_24GHZ, 1);
234  }
235  }
236  } else {
237  /* Reset the IO multiplexer to GPIO functionality */
238  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_GPIO);
239  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_GPIO);
240  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_GPIO);
241  }
242 }
243 #endif
244 
245 /*
246  * ======== Board_initHook ========
247  * Called by Board_init() to perform board-specific initialization.
248  */
249 void Board_initHook()
250 {
251 #if defined(Board_RF_SUB1GHZ)
252  initAntennaSwitch();
253 #endif
254 
256 }
void CC1352P_2_LAUNCHXL_shutDownExtFlash(void)
Shut down the external flash present on the board files.
void CC1352P_2_LAUNCHXL_wakeUpExtFlash(void)
Wake up the external flash present on the board files.