52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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/* TimerPWMmain.c
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* Jonathan Valvano
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* November 3, 2025
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* Derived from timx_timer_mode_pwm_edge_sleep_LP_MSPM0G3507_nortos_ticlang
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* gpio_toggle_output_LP_MSPM0G3507_nortos_ticlang
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*
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*/
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#include <ti/devices/msp/msp.h>
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#include "../inc/LaunchPad.h"
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#include "../inc/Clock.h"
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#include "../inc/PWM.h"
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// PA12 is CCP0 PWM output
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// PA13 is CCP1 PWM output
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// PA0 is red LED1, index 0 in IOMUX PINCM table
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// PB22 is BLUE LED2, index 49 in IOMUX PINCM table
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// PB26 is RED LED2, index 56 in IOMUX PINCM table
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// PB27 is GREEN LED2, index 57 in IOMUX PINCM table
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// PA18 is S1 positive logic switch, index 39 in IOMUX PINCM table
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// PB21 is S2 negative logic switch, index 48 in IOMUX PINCM table
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int main(void){
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uint32_t sw2,lasts2;
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uint32_t Duty,Period,Change;
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Clock_Init40MHz();
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LaunchPad_Init();
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// PWM_Init(PWMUSELFCLK,0,1000,250,750); // 32.768 Hz
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// Duty = 100;
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// Period = 1000;
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// Change = 100;
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PWM_Init(PWMUSEBUSCLK,19,10000,2500,7500); // 100Hz
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Duty = 1000;
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Period = 10000;
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Change = 1000;
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lasts2 = (~(GPIOB->DIN31_0)) & S2;
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while(1){
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Clock_Delay(1000000); // debounce switch
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sw2 = (~(GPIOB->DIN31_0)) & S2;
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if(sw2 && (lasts2==0)){ // touch s2
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Duty = Duty+Change;
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if(Duty >= Period){
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Duty = Change;
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}
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PWM_SetDuty(Duty,Period-Duty);
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}
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lasts2 = sw2;
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}
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}
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