Revision 0:31195a53c37c, committed 2020-03-07

Comitter:

f3d

Date:

Sat Mar 07 15:48:19 2020 +0000

Commit message:

Initial commit

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Mar 07 15:48:19 2020 +0000
@@ -0,0 +1,76 @@
+#include "mbed.h"
+#include "pwm.h"
+DigitalOut myled(LED1);
+/*
+PA8,9,10 are used to drive the PWM outputs.  They are also connected back to TIM_CH1,CH2,CH3 
+EN1,2,3 are pulled low and connected back to PC10,11,12
+PC13 = Blue button
+PB13 = User LED (I think - if not it is PA5)
+*/
+
+
+PwmOut PhA(PA_8);
+PwmOut PhB(PA_9);
+PwmOut PhC(PA_10);
+
+
+DigitalOut En1(PC_10);
+DigitalOut En2(PC_11);
+DigitalOut En3(PC_12);
+Serial pc(USBTX, USBRX); // tx, rx useful for debugging
+volatile int CountA,CountB,CountC;
+
+void TimerISR(void)
+{
+    TIM1->CCR1 = PWM[CountA]; 
+    TIM1->CCR2 = PWM[CountB]; 
+    TIM1->CCR3 = PWM[CountC]; 
+    CountA = (CountA + 1) % PWM_LENGTH;
+    CountB = (CountB + 1) % PWM_LENGTH;
+    CountC = (CountC + 1) % PWM_LENGTH;
+    TIM1->SR &= ~0x3f; // ack the interrupt    
+
+}
+void initTimer1()
+{    
+    
+    TIM1->CR1 = 0; // make sure Counter is disabled before changing configuration
+    TIM1->CR2 = 0;
+    TIM1->PSC = 0;
+    TIM1->ARR = (PWM[0]*2)-1;
+    TIM1->CCR1 = 0; // 0% duty
+    TIM1->CCR2 = 0; // 0% duty
+    TIM1->CCR3 = 0; // 0% duty
+    // Enable timer outputs on channels 1,2,3
+    TIM1->CCER = (1 << 0) + (1 << 4) + (1 << 8);
+    TIM1->SR = 0;      // Clear flags.    
+    TIM1->CR1 |= 1; // enable counter
+
+    // Set up the interrupt handler
+    TIM1->DIER = 1; // Want update interrupt
+    NVIC_SetVector(TIM1_UP_TIM16_IRQn,(uint32_t) TimerISR);   
+    NVIC_EnableIRQ(TIM1_UP_TIM16_IRQn);
+    __enable_irq();   // enable interrupts */
+
+}
+void start()
+{
+    
+    TIM1->CCR1 = 0; // 0% duty
+    TIM1->CCR2 = 0; // 0% duty
+    TIM1->CCR3 = 0; // 0% duty
+    En1 = 1;
+    En2 = 1;
+    En3 = 1;
+    CountA = 0;
+    CountB = PWM_LENGTH / 3;
+    CountC = (2 *PWM_LENGTH) / 3;
+}
+int main() {
+    initTimer1();
+    start();
+    while(1) {
+        wait(0.1);
+            myled = myled ^ 1;
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sat Mar 07 15:48:19 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pwm.h	Sat Mar 07 15:48:19 2020 +0000
@@ -0,0 +1,6 @@
+#include <stdint.h>
+uint16_t PWM[]={
+1500,1535,1571,1606,1641,1676,1711,1746,1781,1815,1849,1883,1917,1951,1984,2017,2049,2081,2113,2144,2175,2205,2235,2265,2294,2322,2350,2377,2403,2429,2455,2479,2503,2527,2549,2571,2592,2613,2632,2651,2669,2686,2703,2718,2733,2747,2760,2773,2784,2794,2804,2813,2820,2827,2833,2838,2843,2846,2848,2850,2850,2850,2848,2846,2843,2838,2833,2827,2820,2813,2804,2794,2784,2773,2760,2747,2733,2718,2703,2686,2669,2651,2632,2613,2592,2571,2549,2527,2503,2479,2455,2429,2403,2377,2350,2322,2294,2265,2235,2205,2175,2144,2113,2081,2049,2017,1984,1951,1917,1883,1849,1815,1781,1746,1711,1676,1641,1606,1571,1535,1500,1465,1429,1394,1359,1324,1289,1254,1219,1185,1151,1117,1083,1049,1016,983,951,919,887,856,825,795,765,735,706,678,650,623,597,571,545,521,497,473,451,429,408,387,368,349,331,314,297,282,267,253,240,227,216,206,196,187,180,173,167,162,157,154,152,150,150,150,152,154,157,162,167,173,180,187,196,206,216,227,240,253,267,282,297,314,331,349,368,387,408,429,451,473,497,521,545,571,597,623,650,678,706,735,765,795,825,856,887,919,951,983,1016,1049,1083,1117,1151,1185,1219,1254,1289,1324,1359,1394,1429,1465
+
+};
+#define PWM_LENGTH ( sizeof(PWM) / sizeof(uint16_t) )
\ No newline at end of file