Contiki-NG
CC1352P_2_LAUNCHXL_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 /*
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 <ti/drivers/Board.h>
50 
51 #include "Board.h"
52 
53 
54 /*
55  * ======== CC1352P_2_LAUNCHXL_sendExtFlashByte ========
56  */
57 void CC1352P_2_LAUNCHXL_sendExtFlashByte(PIN_Handle pinHandle, uint8_t byte)
58 {
59  uint8_t i;
60 
61  /* SPI Flash CS */
62  PIN_setOutputValue(pinHandle, IOID_20, 0);
63 
64  for (i = 0; i < 8; i++) {
65  PIN_setOutputValue(pinHandle, IOID_10, 0); /* SPI Flash CLK */
66 
67  /* SPI Flash MOSI */
68  PIN_setOutputValue(pinHandle, IOID_9, (byte >> (7 - i)) & 0x01);
69  PIN_setOutputValue(pinHandle, IOID_10, 1); /* SPI Flash CLK */
70 
71  /*
72  * Waste a few cycles to keep the CLK high for at
73  * least 45% of the period.
74  * 3 cycles per loop: 8 loops @ 48 Mhz = 0.5 us.
75  */
76  CPUdelay(8);
77  }
78 
79  PIN_setOutputValue(pinHandle, IOID_10, 0); /* CLK */
80  PIN_setOutputValue(pinHandle, IOID_20, 1); /* CS */
81 
82  /*
83  * Keep CS high at least 40 us
84  * 3 cycles per loop: 700 loops @ 48 Mhz ~= 44 us
85  */
86  CPUdelay(700);
87 }
88 
89 /*
90  * ======== CC1352P_2_LAUNCHXL_wakeUpExtFlash ========
91  */
93 {
94  PIN_Config extFlashPinTable[] = {
95  /* SPI Flash CS */
96  IOID_20 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL |
97  PIN_INPUT_DIS | PIN_DRVSTR_MED,
98  PIN_TERMINATE
99  };
100  PIN_State extFlashPinState;
101  PIN_Handle extFlashPinHandle = PIN_open(&extFlashPinState, extFlashPinTable);
102 
103  /*
104  * To wake up we need to toggle the chip select at
105  * least 20 ns and ten wait at least 35 us.
106  */
107 
108  /* Toggle chip select for ~20ns to wake ext. flash */
109  PIN_setOutputValue(extFlashPinHandle, IOID_20, 0);
110  /* 3 cycles per loop: 1 loop @ 48 Mhz ~= 62 ns */
111  CPUdelay(1);
112  PIN_setOutputValue(extFlashPinHandle, IOID_20, 1);
113  /* 3 cycles per loop: 560 loops @ 48 Mhz ~= 35 us */
114  CPUdelay(560);
115 
116  PIN_close(extFlashPinHandle);
117 }
118 
119 /*
120  * ======== CC1352P_2_LAUNCHXL_shutDownExtFlash ========
121  */
123 {
124  /* To be sure we are putting the flash into sleep and not waking it, we first have to make a wake up call */
126 
127  PIN_Config extFlashPinTable[] = {
128  /* SPI Flash CS*/
129  IOID_20 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL |
130  PIN_INPUT_DIS | PIN_DRVSTR_MED,
131  /* SPI Flash CLK */
132  IOID_10 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL |
133  PIN_INPUT_DIS | PIN_DRVSTR_MED,
134  /* SPI Flash MOSI */
135  IOID_9 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL |
136  PIN_INPUT_DIS | PIN_DRVSTR_MED,
137  /* SPI Flash MISO */
138  IOID_8 | PIN_INPUT_EN | PIN_PULLDOWN,
139  PIN_TERMINATE
140  };
141  PIN_State extFlashPinState;
142  PIN_Handle extFlashPinHandle = PIN_open(&extFlashPinState, extFlashPinTable);
143 
144  uint8_t extFlashShutdown = 0xB9;
145 
146  CC1352P_2_LAUNCHXL_sendExtFlashByte(extFlashPinHandle, extFlashShutdown);
147 
148  PIN_close(extFlashPinHandle);
149 }
150 
151 /*
152  * For the SysConfig generated Board.h file, Board_RF_SUB1GHZ will not be
153  * defined unless the RF module is added to the configuration. Therefore,
154  * we don't include this code if Board_RF_SUB1GHZ is not defined.
155  */
156 #if defined(Board_RF_SUB1GHZ)
157 
158 /*
159  * ======== Antenna switching ========
160  */
161 static PIN_Handle antennaPins;
162 static PIN_State antennaState;
163 
164 void initAntennaSwitch()
165 {
166  PIN_Config antennaConfig[] = {
167  Board_RF_24GHZ | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX, /* Path disabled */
168  Board_RF_HIGH_PA | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX, /* Path disabled */
169  Board_RF_SUB1GHZ | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX, /* Path disabled */
170  PIN_TERMINATE
171  };
172  antennaPins = PIN_open(&antennaState, antennaConfig);
173 }
174 
175 /*
176  * ======== CC1352P_2_LAUNCHXL_rfDriverCallback ========
177  * Sets up the antenna switch depending on the current PHY configuration.
178  * Truth table:
179  *
180  * Path DIO28 DIO29 DIO30
181  * =========== ===== ===== =====
182  * Off 0 0 0
183  * Sub-1 GHz 0 0 1
184  * 2.4 GHz 1 0 0
185  * 20 dBm TX 0 1 0
186  */
187 void rfDriverCallback(RF_Handle client, RF_GlobalEvent events, void *arg)
188 {
189  /* Local variable. */
190  bool sub1GHz = false;
191  uint8_t loDivider = 0;
192 
193  /* Switch off all paths first. Needs to be done anyway in every sub-case below. */
194  PINCC26XX_setOutputValue(Board_RF_24GHZ, 0);
195  PINCC26XX_setOutputValue(Board_RF_HIGH_PA, 0);
196  PINCC26XX_setOutputValue(Board_RF_SUB1GHZ, 0);
197 
198  if (events & RF_GlobalEventRadioSetup) {
199  /* Decode the current PA configuration. */
200  RF_TxPowerTable_PAType paType = (RF_TxPowerTable_PAType)RF_getTxPower(client).paType;
201 
202  /* Decode the generic argument as a setup command. */
203  RF_RadioSetup* setupCommand = (RF_RadioSetup*)arg;
204 
205  switch (setupCommand->common.commandNo) {
206  case (CMD_RADIO_SETUP):
207  case (CMD_BLE5_RADIO_SETUP):
208  loDivider = RF_LODIVIDER_MASK & setupCommand->common.loDivider;
209 
210  /* Sub-1GHz front-end. */
211  if (loDivider != 0) {
212  sub1GHz = true;
213  }
214  break;
215  case (CMD_PROP_RADIO_DIV_SETUP):
216  loDivider = RF_LODIVIDER_MASK & setupCommand->prop_div.loDivider;
217 
218  /* Sub-1GHz front-end. */
219  if (loDivider != 0) {
220  sub1GHz = true;
221  }
222  break;
223  default:break;
224  }
225 
226  if (sub1GHz) {
227  /* Sub-1 GHz */
228  if (paType == RF_TxPowerTable_HighPA) {
229  /* PA enable --> HIGH PA
230  * LNA enable --> Sub-1 GHz
231  */
232  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_GPIO);
233  /* Note: RFC_GPO3 is a work-around because the RFC_GPO1 (PA enable signal) is sometimes not
234  de-asserted on CC1352 Rev A. */
235  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_RFC_GPO3);
236  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_RFC_GPO0);
237  } else {
238  /* RF core active --> Sub-1 GHz */
239  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_GPIO);
240  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_GPIO);
241  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_GPIO);
242  PINCC26XX_setOutputValue(Board_RF_SUB1GHZ, 1);
243  }
244  } else {
245  /* 2.4 GHz */
246  if (paType == RF_TxPowerTable_HighPA)
247  {
248  /* PA enable --> HIGH PA
249  * LNA enable --> 2.4 GHz
250  */
251  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_RFC_GPO0);
252  /* Note: RFC_GPO3 is a work-around because the RFC_GPO1 (PA enable signal) is sometimes not
253  de-asserted on CC1352 Rev A. */
254  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_RFC_GPO3);
255  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_GPIO);
256  } else {
257  /* RF core active --> 2.4 GHz */
258  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_GPIO);
259  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_GPIO);
260  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_GPIO);
261  PINCC26XX_setOutputValue(Board_RF_24GHZ, 1);
262  }
263  }
264  } else {
265  /* Reset the IO multiplexer to GPIO functionality */
266  PINCC26XX_setMux(antennaPins, Board_RF_24GHZ, PINCC26XX_MUX_GPIO);
267  PINCC26XX_setMux(antennaPins, Board_RF_HIGH_PA, PINCC26XX_MUX_GPIO);
268  PINCC26XX_setMux(antennaPins, Board_RF_SUB1GHZ, PINCC26XX_MUX_GPIO);
269  }
270 }
271 #endif
272 
273 /*
274  * ======== Board_initHook ========
275  * Called by Board_init() to perform board-specific initialization.
276  */
277 void Board_initHook()
278 {
279 #if defined(Board_RF_SUB1GHZ)
280  initAntennaSwitch();
281 #endif
282 
284 }
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.