230 lines
7.4 KiB
C
230 lines
7.4 KiB
C
/*
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* Copyright (c) 2018, Texas Instruments Incorporated
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of Texas Instruments Incorporated nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* ======== CC1350_LAUNCHXL_433_fxns.c ========
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* This file contains the board-specific initialization functions, and
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* RF callback function for antenna switching.
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*/
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <ti/devices/DeviceFamily.h>
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#include DeviceFamily_constructPath(driverlib/ioc.h)
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#include DeviceFamily_constructPath(driverlib/cpu.h)
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#include <ti/drivers/rf/RF.h>
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#include <ti/drivers/pin/PINCC26XX.h>
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#include "Board.h"
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/*
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* ======== CC1350_LAUNCHXL_433_sendExtFlashByte ========
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*/
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void CC1350_LAUNCHXL_433_sendExtFlashByte(PIN_Handle pinHandle, uint8_t byte)
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{
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uint8_t i;
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/* SPI Flash CS */
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PIN_setOutputValue(pinHandle, IOID_20, 0);
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for (i = 0; i < 8; i++) {
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PIN_setOutputValue(pinHandle, IOID_10, 0); /* SPI Flash CLK */
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/* SPI Flash MOSI */
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PIN_setOutputValue(pinHandle, IOID_9, (byte >> (7 - i)) & 0x01);
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PIN_setOutputValue(pinHandle, IOID_10, 1); /* SPI Flash CLK */
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/*
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* Waste a few cycles to keep the CLK high for at
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* least 45% of the period.
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* 3 cycles per loop: 8 loops @ 48 Mhz = 0.5 us.
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*/
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CPUdelay(8);
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}
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PIN_setOutputValue(pinHandle, IOID_10, 0); /* CLK */
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PIN_setOutputValue(pinHandle, IOID_20, 1); /* CS */
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/*
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* Keep CS high at least 40 us
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* 3 cycles per loop: 700 loops @ 48 Mhz ~= 44 us
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*/
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CPUdelay(700);
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}
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/*
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* ======== CC1350_LAUNCHXL_433_wakeUpExtFlash ========
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*/
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void CC1350_LAUNCHXL_433_wakeUpExtFlash(void)
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{
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PIN_Config extFlashPinTable[] = {
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/* SPI Flash CS */
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IOID_20 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL |
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PIN_INPUT_DIS | PIN_DRVSTR_MED,
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PIN_TERMINATE
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};
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PIN_State extFlashPinState;
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PIN_Handle extFlashPinHandle = PIN_open(&extFlashPinState, extFlashPinTable);
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/*
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* To wake up we need to toggle the chip select at
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* least 20 ns and ten wait at least 35 us.
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*/
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/* Toggle chip select for ~20ns to wake ext. flash */
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PIN_setOutputValue(extFlashPinHandle, IOID_20, 0);
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/* 3 cycles per loop: 1 loop @ 48 Mhz ~= 62 ns */
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CPUdelay(1);
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PIN_setOutputValue(extFlashPinHandle, IOID_20, 1);
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/* 3 cycles per loop: 560 loops @ 48 Mhz ~= 35 us */
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CPUdelay(560);
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PIN_close(extFlashPinHandle);
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}
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/*
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* ======== CC1350_LAUNCHXL_433_shutDownExtFlash ========
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*/
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void CC1350_LAUNCHXL_433_shutDownExtFlash(void)
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{
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/*
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* To be sure we are putting the flash into sleep and not waking it,
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* we first have to make a wake up call
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*/
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CC1350_LAUNCHXL_433_wakeUpExtFlash();
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PIN_Config extFlashPinTable[] = {
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/* SPI Flash CS*/
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IOID_20 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL |
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PIN_INPUT_DIS | PIN_DRVSTR_MED,
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/* SPI Flash CLK */
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IOID_10 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL |
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PIN_INPUT_DIS | PIN_DRVSTR_MED,
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/* SPI Flash MOSI */
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IOID_9 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL |
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PIN_INPUT_DIS | PIN_DRVSTR_MED,
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/* SPI Flash MISO */
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IOID_8 | PIN_INPUT_EN | PIN_PULLDOWN,
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PIN_TERMINATE
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};
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PIN_State extFlashPinState;
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PIN_Handle extFlashPinHandle = PIN_open(&extFlashPinState, extFlashPinTable);
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uint8_t extFlashShutdown = 0xB9;
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CC1350_LAUNCHXL_433_sendExtFlashByte(extFlashPinHandle, extFlashShutdown);
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PIN_close(extFlashPinHandle);
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}
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/*
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* ======== Board_initHook ========
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* Called by Board_init() to perform board-specific initialization.
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*/
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void Board_initHook()
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{
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CC1350_LAUNCHXL_433_shutDownExtFlash();
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}
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/*
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* For the SysConfig generated Board.h file, Board_RF_SUB1GHZ will not be
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* defined unless the RF module is added to the configuration. Therefore,
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* we don't include this code if Board_RF_SUB1GHZ is not defined.
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*/
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#if defined(Board_RF_SUB1GHZ)
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/*
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* Mask to be used to determine the effective value of the setup command's
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* loDivider field.
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*/
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#define LODIVIDER_MASK 0x7F
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/*
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* ======== rfDriverCallback ========
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* This is an implementation for the CC1350 LaunchPad which uses a
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* single signal for antenna switching.
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*/
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void rfDriverCallback(RF_Handle client, RF_GlobalEvent events, void *arg)
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{
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/* Decode input arguments. */
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(void)client;
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RF_RadioSetup* setupCommand = (RF_RadioSetup*)arg;
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/* Local variable. */
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bool sub1GHz = false;
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uint8_t loDivider = 0;
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if (events & RF_GlobalEventRadioSetup) {
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/* Power up the antenna switch */
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PINCC26XX_setOutputValue(Board_RF_POWER, 1);
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/* Decision about the frequency band shall be made based on the
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loDivider field. */
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switch (setupCommand->common.commandNo) {
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case (CMD_RADIO_SETUP):
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case (CMD_BLE5_RADIO_SETUP):
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loDivider = LODIVIDER_MASK & setupCommand->common.loDivider;
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/* Sub-1 GHz, requires antenna switch high. */
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if ((loDivider != 0) && (loDivider != 2)) {
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sub1GHz = true;
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}
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break;
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case (CMD_PROP_RADIO_DIV_SETUP):
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loDivider = LODIVIDER_MASK & setupCommand->prop_div.loDivider;
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/* Sub-1 GHz, requires antenna switch high. */
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if ((loDivider != 0) && (loDivider != 2)) {
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sub1GHz = true;
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}
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break;
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default:break;
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}
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/* Select the correct antenna. */
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if (sub1GHz) {
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PINCC26XX_setOutputValue(Board_RF_SUB1GHZ, 1);
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}
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else {
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PINCC26XX_setOutputValue(Board_RF_SUB1GHZ, 0);
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}
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}
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else if (events & RF_GlobalEventRadioPowerDown) {
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/* Disable antenna switch to save current */
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PINCC26XX_setOutputValue(Board_RF_POWER, 0);
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PINCC26XX_setOutputValue(Board_RF_SUB1GHZ, 0);
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}
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}
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#endif
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