Diff: GPDMA/Link_list/link_list.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GPDMA/Link_list/link_list.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,297 @@
+/***********************************************************************//**
+ * @file		link_list.c
+ * @purpose		This example used to test GPDMA Link list function
+ * @version		1.0
+ * @date		16. July. 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_gpdma.h"
+#include "lpc17xx_libcfg.h"
+#include "debug_frmwrk.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup GPDMA_Link_list	Link_list
+ * @ingroup GPDMA_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINTIONS*************************/
+/** DMA transfer size */
+#define DMA_SIZE		32
+
+/************************** PRIVATE VARIABLES *************************/
+uint8_t menu[]=
+	"********************************************************************************\n\r"
+	"Hello NXP Semiconductors \n\r"
+	"GPDMA demo \n\r"
+	"\t - MCU: LPC17xx \n\r"
+	"\t - Core: ARM CORTEX-M3 \n\r"
+	"\t - Communicate via: UART0 - 115200 bps \n\r"
+	"This example used to test GPDMA link list function \n\r"
+	"********************************************************************************\n\r";
+uint8_t menu2[] = "Demo terminated! \n\r";
+uint8_t err_menu[] = "Buffer Check fail!\n\r";
+uint8_t compl_menu[] = "Buffer Check success!\n\r";
+
+uint32_t DMADest_Buffer[DMA_SIZE];
+
+#if (defined (__ICCARM__))
+#pragma location = "data_init"
+uint32_t const DMASrc_Buffer1[DMA_SIZE/2] =
+#else
+uint32_t DMASrc_Buffer1[DMA_SIZE/2] __attribute__((at(0x2007C000))) =
+#endif
+{
+	0x01020304,0x05060708,0x090A0B0C,0x0D0E0F10,
+	0x11121314,0x15161718,0x191A1B1C,0x1D1E1F20,
+	0x21222324,0x25262728,0x292A2B2C,0x2D2E2F30,
+	0x31323334,0x35363738,0x393A3B3C,0x3D3E3F40
+};
+
+// Terminal Counter flag for Channel 0
+__IO uint32_t Channel0_TC;
+
+// Error Counter flag for Channel 0
+__IO uint32_t Channel0_Err;
+
+#if (defined (__ICCARM__))
+#pragma location = "data_init"
+uint32_t const DMASrc_Buffer2[DMA_SIZE/2] =
+#else
+uint32_t DMASrc_Buffer2[DMA_SIZE/2] __attribute__((at(0x2007C200)))=
+#endif
+{
+	0x41424344,0x45464748,0x494A4B4C,0x4D4E4F50,
+	0x51525354,0x55565758,0x595A5B5C,0x5D5E5F60,
+	0x61626364,0x65666768,0x696A6B6C,0x6D6E6F70,
+	0x71727374,0x75767778,0x797A7B7C,0x7D7E7F80
+};
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+void DMA_IRQHandler (void);
+
+void print_menu(void);
+void Error_Loop(void);
+
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+/*********************************************************************//**
+ * @brief		GPDMA interrupt handler sub-routine
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void DMA_IRQHandler (void)
+{
+	// check GPDMA interrupt on channel 0
+	if (GPDMA_IntGetStatus(GPDMA_STAT_INT, 0)){ //check interrupt status on channel 0
+		// Check counter terminal status
+		if(GPDMA_IntGetStatus(GPDMA_STAT_INTTC, 0)){
+			// Clear terminate counter Interrupt pending
+			GPDMA_ClearIntPending (GPDMA_STATCLR_INTTC, 0);
+				Channel0_TC++;
+		}
+		if (GPDMA_IntGetStatus(GPDMA_STAT_INTERR, 0)){
+			// Clear error counter Interrupt pending
+			GPDMA_ClearIntPending (GPDMA_STATCLR_INTERR, 0);
+			Channel0_Err++;
+		}
+	}
+}
+
+/*-------------------------PRIVATE FUNCTIONS-----------------------------*/
+/*********************************************************************//**
+ * @brief		Print Welcome menu
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void print_menu(void)
+{
+	_DBG(menu);
+}
+
+
+/*********************************************************************//**
+ * @brief		Verify buffer
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void Buffer_Verify(void)
+{
+	uint8_t i;
+	uint32_t *src_addr = (uint32_t *)DMASrc_Buffer1;
+	uint32_t *dest_addr = (uint32_t *)DMADest_Buffer;
+
+	for ( i = 0; i < DMA_SIZE/2; i++ )
+	{
+		if ( *src_addr++ != *dest_addr++ )
+		{
+			/* Call Error Loop */
+			Error_Loop();
+		}
+	}
+	src_addr = (uint32_t *)DMASrc_Buffer2;
+	for ( i = 0; i < DMA_SIZE/2; i++ )
+	{
+		if ( *src_addr++ != *dest_addr++ )
+		{
+			/* Call Error Loop */
+			Error_Loop();
+		}
+	}
+}
+
+
+/*********************************************************************//**
+ * @brief		Error Loop (called by Buffer_Verify() if any error)
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void Error_Loop(void)
+{
+	_DBG(err_menu);
+
+	/* Loop forever */
+	while (1);
+}
+
+
+/*-------------------------MAIN FUNCTION--------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	GPDMA_Channel_CFG_Type GPDMACfg;
+	GPDMA_LLI_Type DMA_LLI_Struct[2];
+
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	// print welcome screen
+	print_menu();
+
+	/* GPDMA block section -------------------------------------------- */
+    /* Disable GPDMA interrupt */
+    NVIC_DisableIRQ(DMA_IRQn);
+    /* preemption = 1, sub-priority = 1 */
+    NVIC_SetPriority(DMA_IRQn, ((0x01<<3)|0x01));
+
+    /* Initialize GPDMA controller */
+	GPDMA_Init();
+
+	/* Init GPDMA link list */
+	DMA_LLI_Struct[0].SrcAddr = (uint32_t)&DMASrc_Buffer1;
+	DMA_LLI_Struct[0].DstAddr = (uint32_t)&DMADest_Buffer;
+	DMA_LLI_Struct[0].NextLLI = (uint32_t)&DMA_LLI_Struct[1];
+	DMA_LLI_Struct[0].Control = (DMA_SIZE/2)
+								| (2<<18) //source width 32 bit
+								| (2<<21) //dest. width 32 bit
+								| (1<<26) //source increment
+								| (1<<27)
+								;
+	DMA_LLI_Struct[1].SrcAddr = (uint32_t)&DMASrc_Buffer2;
+	DMA_LLI_Struct[1].DstAddr = ((uint32_t)&DMADest_Buffer) + (DMA_SIZE/2)*4;
+	DMA_LLI_Struct[1].NextLLI = 0;
+	DMA_LLI_Struct[1].Control = (DMA_SIZE/2)
+								| (2<<18) //source width 32 bit
+								| (2<<21) //dest. width 32 bit
+								| (1<<26) //source increment
+								| (1<<27)
+								;
+
+	// Setup GPDMA channel --------------------------------
+	// channel 0
+	GPDMACfg.ChannelNum = 0;
+	// Source memory
+	GPDMACfg.SrcMemAddr = (uint32_t)DMASrc_Buffer1;
+	// Destination memory
+	GPDMACfg.DstMemAddr = (uint32_t)DMADest_Buffer;
+	// Transfer size
+	GPDMACfg.TransferSize = DMA_SIZE;
+	// Transfer width
+	GPDMACfg.TransferWidth = GPDMA_WIDTH_WORD;
+	// Transfer type
+	GPDMACfg.TransferType = GPDMA_TRANSFERTYPE_M2M;
+	// Source connection - unused
+	GPDMACfg.SrcConn = 0;
+	// Destination connection - unused
+	GPDMACfg.DstConn = 0;
+	// Linker List Item
+	GPDMACfg.DMALLI = (uint32_t)&DMA_LLI_Struct[0];
+	// Setup channel with given parameter
+	GPDMA_Setup(&GPDMACfg);
+
+	/* Reset terminal counter */
+	Channel0_TC = 0;
+	/* Reset Error counter */
+	Channel0_Err = 0;
+
+	_DBG_("Start transfer...");
+
+	// Enable GPDMA channel 0
+	GPDMA_ChannelCmd(0, ENABLE);
+
+	/* Enable GPDMA interrupt */
+	NVIC_EnableIRQ(DMA_IRQn);
+
+	/* Wait for GPDMA processing complete */
+	while ((Channel0_TC == 0) && (Channel0_Err == 0));
+
+	/* Verify buffer */
+	Buffer_Verify();
+
+	_DBG(compl_menu);
+
+    /* 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
+
+/*
+ * @}
+ */