2020-2021 Sunseeker Telemetry and Lighting System
cs_ex1_outputClockSignals.c
Go to the documentation of this file.
1 /* --COPYRIGHT--,BSD
2  * Copyright (c) 2017, 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  * --/COPYRIGHT--*/
32 /*******************************************************************************
33  * MSP430i2xx Clock System - Output Clock Signals
34  *
35  * Description: In this example, the DCO is setup to use the internal resistor.
36  * Then the GPIO pins are configured in peripheral function mode so that the
37  * clock signals are output on the pins. Finally, clock dividers are set for
38  * the MCLK and SMCLK to show a divided clock. The divided clocks can be seen
39  * on the pins using an measurement device. This example demonstrates how to
40  * setup the DCO and setup the clock speed for the device.
41  *
42  *
43  * MSP430i2041
44  * ------------------
45  * /|\| |
46  * | | P1.0|-->MCLK = DCO/2 = 8.192MHz
47  * --|RST |
48  * | P1.1|-->SMCLK = DCO/16 = 1.024MHz
49  * | |
50  * | P1.2|-->ACLK = DCO/512 = 32kHz
51  * | |
52  * | |
53  *
54  * Author: Zack Lalanne
55  ******************************************************************************/
56 
57 #include "driverlib.h"
58 
59 int main(void) {
60 
61  WDT_hold(WDT_BASE);
62 
63  // Setting the DCO to use the internal resistor. DCO will be at 16.384MHz
64  CS_setupDCO(CS_INTERNAL_RESISTOR);
65 
66  // Set P1.0, P1.1, P1.2 to output clock signals
67  GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P1,
68  GPIO_PIN0 | GPIO_PIN1 | GPIO_PIN2,
69  GPIO_SECONDARY_MODULE_FUNCTION);
70 
71  // Setting dividers for MCLK and SMCLK
72  CS_initClockSignal(CS_MCLK, CS_CLOCK_DIVIDER_2);
73  CS_initClockSignal(CS_SMCLK, CS_CLOCK_DIVIDER_16);
74 
75  // Stay in active mode so all clocks keep running
76  while(1) {
77 
78  }
79 
80 }
main
int main(void)
Definition: cs_ex1_outputClockSignals.c:59