Initial commit of files

2021-01-22 10:16:20 -05:00
parent 32d165ec8f
commit ed92211680
534 changed files with 68563 additions and 19 deletions
--- a/src/libPIC/pwm.c
+++ b/src/libPIC/pwm.c
@ -0,0 +1,87 @@
+/*****************************************************************************
+ * Copyright (C) 2008
+ * ProbeStar Telematics, LLC
+ * All Rights Reserved.  Proprietary and Confidential.
+ *============================================================================
+ * PWM Output
+ *----------------------------------------------------------------------------
+ * Output PWM (8 bit resolution for now)
+*****************************************************************************/
+
+/*****************************************************************************
+ * includes
+*****************************************************************************/
+
+#include "system.h"
+#include "delay.h"
+#include "pwm.h"
+
+/*****************************************************************************
+ * defines
+*****************************************************************************/
+
+/*****************************************************************************
+ * macros
+*****************************************************************************/
+
+/*****************************************************************************
+ * structs & typedefs
+*****************************************************************************/
+
+/*****************************************************************************
+ * global constants
+*****************************************************************************/
+
+/*****************************************************************************
+ * global variables
+*****************************************************************************/
+
+/*****************************************************************************
+ * static constants
+*****************************************************************************/
+
+/*****************************************************************************
+ * static variables
+*****************************************************************************/
+
+/*****************************************************************************
+ * static prototypes
+*****************************************************************************/
+
+/*****************************************************************************
+ * C functions
+*****************************************************************************/
+
+
+void PwmInit( void )
+{
+	RC1 = RC2 = 0;
+	PR2 = 255;			// max period
+	T2CON = 0b00000111;		// 16:1 prescale
+	// PWM1
+	TRISC1 = 0;
+	CCPR1L = 0;
+	CCP1CON = 0b00001100;
+	// PMW2
+	TRISC2 = 0;
+	CCPR2L = 0;
+	CCP2CON = 0b00001100;
+}
+
+// duty cycle 0-PWM_DUTY_MAX (use macro)
+void PwmOut( BYTE byPin, WORD wDuty )
+{
+	// clip
+	if ( wDuty > PWM_DUTY_MAX )
+		wDuty = PWM_DUTY_MAX;
+
+	// allows custom rate for timer 2
+	if ( PR2 != 255 )
+		wDuty = wDuty * PR2 / PWM_DUTY_CYCLE;
+
+	// scale duty cycle
+	if ( byPin == 1 )
+		CCPR1L = wDuty;
+	if ( byPin == 2 )
+		CCPR2L = wDuty;
+}