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inc/PWM1.h

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+/*!
+ * @defgroup PWM1
+ * @brief Pulse width modulation
+ <table>
+<caption id="PWMpins2">PWM pins on the MSPM0G3507</caption>
+<tr><th>Pin  <th>Description
+<tr><td>PB4  <td>CCP0 PWM output
+<tr><td>PB1  <td>CCP1 PWM output
+</table>
+ * @{*/
+/**
+ * @file      PWM1.h
+ * @brief     Pulse width modulation
+ * @details   Hardware creates fixed period, variable duty cycle waves
+ * \image html PWM_100Hz.png  width=500px
+ * @version   ECE319K v1.0
+ * @author    Daniel Valvano and Jonathan Valvano
+ * @copyright Copyright 2023 by Jonathan W. Valvano, valvano@mail.utexas.edu,
+ * @warning   AS-IS
+ * @note      For more information see  http://users.ece.utexas.edu/~valvano/
+ * @date      April 3, 2024
+ <table>
+<caption id="PWMpins3">PWM pins on the MSPM0G3507</caption>
+<tr><th>Pin  <th>Description
+<tr><td>PB4  <td>CCP0 PWM output
+<tr><td>PB1  <td>CCP1 PWM output
+</table>
+  ******************************************************************************/
+
+/* 
+ * Derived from timx_timer_mode_pwm_edge_sleep_LP_MSPM0G3507_nortos_ticlang
+ 
+ */
+
+#ifndef __PWM1_H__
+#define __PWM1_H__
+
+/**
+ * \brief use PWMUSELFCLK to select LFCLK
+ */
+#define PWMUSELFCLK 2
+/**
+ * \brief use PWMUSEMFCLK to select MFCLK
+ */
+#define PWMUSEMFCLK 4
+/**
+ * \brief use PWMUSEBUSCLK to select bus CLK
+ */
+#define PWMUSEBUSCLK 8
+/**
+ * Initialize PWM outputs on PA12 PA13.
+ * Rising edge synchronized. timerClkDivRatio = 1.
+ * Once started, hardware will continuously output the waves.
+ * - timerClkSrc = 
+ *    - 2 for 32768 Hz LFCLK
+ *    - 4 for 4MHz MFCLK (not tested)
+ *    - 8 for 80/32/4 BUSCLK
+ * - G0/G8  is on Power domain PD0
+ *    - 32MHz bus clock, BUSCLK clock is 32MHz
+ *    - 40MHz bus clock, BUSCLK clock is ULPCLK 20MHz
+ *    - 80MHz bus clock, BUSCLK clock is ULPCLK 40MHz
+ * - PWMFreq = (timerClkSrc / (timerClkDivRatio * (timerClkPrescale + 1) * period))
+ *    - For example, source=LFCLK, prescale = 0, period = 1000, PWM frequency = 32.768 Hz
+ *    - For example, source=BUSCLK, bus=40MHz, prescale=19, period = 10000, PWM frequency = 10kHz 
+ *
+ * @param timerClkSrc is 2 4 or 8
+ * @param timerClkPrescale divide clock by timerClkPrescale+1, 0 to 255
+ * @param period sets the PWM period
+ * @param duty0 sets the duty cycle on PA12 
+ * @param duty1 sets the duty cycle on PA13 
+ * @return none 
+ * @note  Will call LaunchPad_Init to reset and activate power
+ * @see PWM_SetDuty
+ * @brief Initialize PWM
+ */
+void PWM1_Init(uint32_t timerClkSrc, uint32_t timerClkPrescale,
+              uint32_t period, uint32_t duty0, uint32_t duty1);
+/**
+ * Set duty cycles on PA12 PA13.
+ * @param duty0 sets the duty cycle on PA12 
+ * @param duty1 sets the duty cycle on PA13 
+ * @return none 
+ * @note  assumes PWM_Init was called
+ * @see PWM_Init
+ * @brief Set duty cycles
+ */			  
+void PWM1_SetDuty(uint32_t duty0, uint32_t duty1);
+
+#endif // __PWM_H__
+/** @}*/
+