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I use this code for servomotor SG90, but on pin 2.4 I have 88mv and I want to have ~5v:
/*******************************************************************************
* MSP432 Timer_A - Variable PWM
*
* Description: In this example, the Timer_A module is used to create a precision
* PWM with an adjustable duty cycle. The PWM initial period is 200 ms and is
* output on P2.4. The initial duty cycle of the PWM is 10%, however when the
* button is pressed on P1.1 the duty cycle is sequentially increased by 10%.
* Once the duty cycle reaches 90%, the duty cycle is reset to 10% on the
* following button press.
*
* MSP432P401
* ------------------
* /|\| |
* | | |
* --|RST P1.1 |<--Toggle Switch
* | |
* | |
* | P2.4 |--> Output PWM
* | |
* | |
*
* Author: Timothy Logan
*******************************************************************************/
/* DriverLib Includes */
#include "driverlib.h"
/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>
/* Timer_A PWM Configuration Parameter */
Timer_A_PWMConfig pwmConfig =
{
//uint_fast16_t clockSource;
TIMER_A_CLOCKSOURCE_SMCLK,
//uint_fast16_t clockSourceDivider;
TIMER_A_CLOCKSOURCE_DIVIDER_1,
//uint_fast16_t timerPeriod;
1280,
//uint_fast16_t compareRegister;
TIMER_A_CAPTURECOMPARE_REGISTER_1,
//uint_fast16_t compareOutputMode;
TIMER_A_OUTPUTMODE_RESET_SET,
//uint_fast16_t dutyCycle;
80
};
int main(void)
{
/* Halting the watchdog */
MAP_WDT_A_holdTimer();
/* Setting MCLK to REFO at 128Khz for LF mode
* Setting SMCLK to 64Khz */
MAP_CS_setReferenceOscillatorFrequency(CS_REFO_128KHZ);
MAP_CS_initClockSignal(CS_MCLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1);
MAP_CS_initClockSignal(CS_SMCLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_2);
MAP_PCM_setPowerState(PCM_AM_LF_VCORE0);
/* Configuring GPIO2.4 as peripheral output for PWM and P1.1 for button
* interrupt */
MAP_GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P2, GPIO_PIN4, GPIO_PRIMARY_MODULE_FUNCTION);
MAP_GPIO_setOutputHighOnPin(GPIO_PORT_P2, GPIO_PIN4);
MAP_GPIO_setAsInputPinWithPullUpResistor(GPIO_PORT_P1, GPIO_PIN1);
MAP_GPIO_clearInterruptFlag(GPIO_PORT_P1, GPIO_PIN1);
MAP_GPIO_enableInterrupt(GPIO_PORT_P1, GPIO_PIN1);
/* Configuring Timer_A to have a period of approximately 500ms and
* an initial duty cycle of 10% of that (3200 ticks) */
MAP_Timer_A_generatePWM(TIMER_A0_BASE, &pwmConfig);
/* Enabling interrupts and starting the watchdog timer */
MAP_Interrupt_enableInterrupt(INT_PORT1);
MAP_Interrupt_enableSleepOnIsrExit();
MAP_Interrupt_enableMaster();
/* Sleeping when not in use */
while (1)
{
MAP_PCM_gotoLPM0();
}
}
/* Port1 ISR - This ISR will progressively step up the duty cycle of the PWM
* on a button press
*/
void PORT1_IRQHandler(void)
{
uint32_t status = MAP_GPIO_getEnabledInterruptStatus(GPIO_PORT_P1);
MAP_GPIO_clearInterruptFlag(GPIO_PORT_P1, status);
if (status & GPIO_PIN1)
{
if(pwmConfig.dutyCycle == 1000)
pwmConfig.dutyCycle = 280;
else
pwmConfig.dutyCycle += 280;
MAP_Timer_A_generatePWM(TIMER_A0_BASE, &pwmConfig);
}
}
How to change my code for this thing.
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