Diff: PWM/Dual_Edge/pwm_dual_edge.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PWM/Dual_Edge/pwm_dual_edge.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,165 @@
+/***********************************************************************//**
+ * @file		pwm_dual_edge.c
+ * @purpose		This program illustrates the PWM signal on 3 Channels in
+ * 			  	both edge mode and single mode.
+ * @version		2.0
+ * @date		21. May. 2010
+ * @author		NXP MCU SW Application Team
+ *---------------------------------------------------------------------
+ * Software that is described herein is for illustrative purposes only
+ * which provides customers with programming information regarding the
+ * products. This software is supplied "AS IS" without any warranties.
+ * NXP Semiconductors assumes no responsibility or liability for the
+ * use of the software, conveys no license or title under any patent,
+ * copyright, or mask work right to the product. NXP Semiconductors
+ * reserves the right to make changes in the software without
+ * notification. NXP Semiconductors also make no representation or
+ * warranty that such application will be suitable for the specified
+ * use without further testing or modification.
+ **********************************************************************/
+#include "lpc17xx_pwm.h"
+#include "lpc17xx_libcfg.h"
+#include "lpc17xx_pinsel.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup PWM_Dual_Edge	Dual_Edge
+ * @ingroup PWM_Examples
+ * @{
+ */
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main PWM program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	uint8_t temp;
+	PWM_TIMERCFG_Type PWMCfgDat;
+	PWM_MATCHCFG_Type PWMMatchCfgDat;
+	PINSEL_CFG_Type PinCfg;
+
+	/* PWM block section -------------------------------------------- */
+	/* Initialize PWM peripheral, timer mode
+	 * PWM prescale value = 1 (absolute value - tick value) */
+	PWMCfgDat.PrescaleOption = PWM_TIMER_PRESCALE_TICKVAL;
+	PWMCfgDat.PrescaleValue = 1;
+	PWM_Init(LPC_PWM1, PWM_MODE_TIMER, (void *) &PWMCfgDat);
+
+	/*
+	 * Initialize PWM pin connect
+	 *
+	 */
+	PinCfg.Funcnum = 1;
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+	PinCfg.Portnum = 2;
+	for (temp = 0; temp <= 6; temp++){
+		PinCfg.Pinnum = temp;
+		PINSEL_ConfigPin(&PinCfg);
+	}
+
+
+	/* Set match value for PWM match channel 0 = 100, update immediately */
+	PWM_MatchUpdate(LPC_PWM1, 0, 100, PWM_MATCH_UPDATE_NOW);
+	/* PWM Timer/Counter will be reset when channel 0 matching
+	 * no interrupt when match
+	 * no stop when match */
+	PWMMatchCfgDat.IntOnMatch = DISABLE;
+	PWMMatchCfgDat.MatchChannel = 0;
+	PWMMatchCfgDat.ResetOnMatch = ENABLE;
+	PWMMatchCfgDat.StopOnMatch = DISABLE;
+	PWM_ConfigMatch(LPC_PWM1, &PWMMatchCfgDat);
+
+	/* Configure each PWM channel: --------------------------------------------- */
+	/* - Channel 2: Double Edge
+	 * - Channel 4: Double Edge
+	 * - Channel 5: Single Edge
+	 * The Match register values are as follows:
+	 * - MR0 = 100 (PWM rate)
+	 * - MR1 = 41, MR2 = 78 (PWM2 output)
+	 * - MR3 = 53, MR4 = 27 (PWM4 output)
+	 * - MR5 = 65 (PWM5 output)
+	 * PWM Duty on each PWM channel:
+	 * - Channel 2: Set by match 1, Reset by match 2.
+	 * - Channel 4: Set by match 3, Reset by match 4.
+	 * - Channel 5: Set by match 0, Reset by match 5.
+	 */
+
+	/* Edge setting ------------------------------------ */
+	PWM_ChannelConfig(LPC_PWM1, 2, PWM_CHANNEL_DUAL_EDGE);
+	PWM_ChannelConfig(LPC_PWM1, 4, PWM_CHANNEL_DUAL_EDGE);
+	PWM_ChannelConfig(LPC_PWM1, 5, PWM_CHANNEL_SINGLE_EDGE);
+
+	/* Match value setting ------------------------------------ */
+	PWM_MatchUpdate(LPC_PWM1, 1, 41, PWM_MATCH_UPDATE_NOW);
+	PWM_MatchUpdate(LPC_PWM1, 2, 78, PWM_MATCH_UPDATE_NOW);
+	PWM_MatchUpdate(LPC_PWM1, 3, 53, PWM_MATCH_UPDATE_NOW);
+	PWM_MatchUpdate(LPC_PWM1, 4, 27, PWM_MATCH_UPDATE_NOW);
+	PWM_MatchUpdate(LPC_PWM1, 5, 65, PWM_MATCH_UPDATE_NOW);
+
+
+	/* Match option setting ------------------------------------ */
+	for (temp = 1; temp < 6; temp++)
+	{
+		/* Configure match option */
+		PWMMatchCfgDat.IntOnMatch = DISABLE;
+		PWMMatchCfgDat.MatchChannel = temp;
+		PWMMatchCfgDat.ResetOnMatch = DISABLE;
+		PWMMatchCfgDat.StopOnMatch = DISABLE;
+		PWM_ConfigMatch(LPC_PWM1, &PWMMatchCfgDat);
+	}
+
+	/* Enable PWM Channel Output ------------------------------------ */
+	/* Channel 2 */
+	PWM_ChannelCmd(LPC_PWM1, 2, ENABLE);
+	/* Channel 4 */
+	PWM_ChannelCmd(LPC_PWM1, 4, ENABLE);
+	/* Channel 5 */
+	PWM_ChannelCmd(LPC_PWM1, 5, ENABLE);
+
+	/* Reset and Start counter */
+	PWM_ResetCounter(LPC_PWM1);
+	PWM_CounterCmd(LPC_PWM1, ENABLE);
+
+	/* Start PWM now */
+	PWM_Cmd(LPC_PWM1, ENABLE);
+
+    /* Loop forever */
+    while(1);
+    return 1;
+}
+
+/* With ARM and GHS toolsets, the entry point is main() - this will
+   allow the linker to generate wrapper code to setup stacks, allocate
+   heap area, and initialize and copy code and data segments. For GNU
+   toolsets, the entry point is through __start() in the crt0_gnu.asm
+   file, and that startup code will setup stacks and data */
+int main(void)
+{
+    return c_entry();
+}
+
+
+#ifdef  DEBUG
+/*******************************************************************************
+* @brief		Reports the name of the source file and the source line number
+* 				where the CHECK_PARAM error has occurred.
+* @param[in]	file Pointer to the source file name
+* @param[in]    line assert_param error line source number
+* @return		None
+*******************************************************************************/
+void check_failed(uint8_t *file, uint32_t line)
+{
+	/* User can add his own implementation to report the file name and line number,
+	 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+
+	/* Infinite loop */
+	while(1);
+}
+#endif
+
+/*
+ * @}
+ */