Diff: DMA_M2M.c

Revision:

0:692bf16d1455

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DMA_M2M.c	Sun Nov 14 03:26:04 2010 +0000
@@ -0,0 +1,239 @@
+/***********************************************************************//**
+ * @file        flash_2_ram.c
+ * @purpose     This example used to test GPDMA function by transferring
+ *              data from flash to ram memory
+ * @version     2.0
+ * @date        21. May. 2010
+ * @author      NXP MCU SW Application Team
+ *   
+ *  Adupted for mebed 
+ *  and modified for insturction execution test during DMA
+ *    by Todotani 14 Nov. 2010
+ *---------------------------------------------------------------------
+ * 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 "mbed.h"
+#include "GetTickCount.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup GPDMA_Flash_2_Ram_Test    Flash_2_Ram_Test
+ * @ingroup GPDMA_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINTIONS*************************/
+#define DMA_SIZE        32          /** DMA transfer size */
+#define DMA_CYCLES      1000
+
+/************************** PRIVATE VARIABLES *************************/
+uint8_t menu[]=
+    "********************************************************************************\n\r"
+    "Hello NXP Semiconductors \n\r"
+    "GPDMA demo \n\r"
+    "\t - MCU: LPC1768(mbed) \n\r"
+    "\t - Core: ARM CORTEX-M3 \n\r"
+    "\t - Communicate via: UART0 - 9600 bps \n\r"
+    "This example used to test GPDMA function by transfer data from Flash \n\r"
+    "to RAM memory\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\n\r";
+
+//DMAScr_Buffer will be burn into flash when compile
+static uint32_t DMASrc_Buffer[DMA_SIZE]=
+{
+    0x01020304,0x05060708,0x090A0B0C,0x0D0E0F10,
+    0x11121314,0x15161718,0x191A1B1C,0x1D1E1F20,
+    0x21222324,0x25262728,0x292A2B2C,0x2D2E2F30,
+    0x31323334,0x35363738,0x393A3B3C,0x3D3E3F40,
+    0x01020304,0x05060708,0x090A0B0C,0x0D0E0F10,
+    0x11121314,0x15161718,0x191A1B1C,0x1D1E1F20,
+    0x21222324,0x25262728,0x292A2B2C,0x2D2E2F30,
+    0x31323334,0x35363738,0x393A3B3C,0x3D3E3F40
+};
+
+uint32_t DMADest_Buffer[DMA_SIZE];
+//uint32_t *DMADest_Buffer = (uint32_t *)0x2007C000;   //LPC_AHBRAM0_BASE;
+
+volatile uint32_t TC_count = 0;
+uint32_t loop = 0;
+GPDMA_Channel_CFG_Type GPDMACfg;
+
+Serial pc(USBTX, USBRX);
+
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+extern "C" void DMA_IRQHandler (void);      // extern "C" required for mbed
+
+void Buffer_Init(void);
+void Buffer_Verify(void);
+void SetupDMA(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);
+
+            if (++TC_count < DMA_CYCLES) {
+                // Setup channel with given parameter
+                GPDMA_Setup(&GPDMACfg);
+                // Run DMA again
+                GPDMA_ChannelCmd(0, ENABLE);
+                return;
+            } else {
+                /* DMA run predetermined cycles */
+                int elapsedTime =  GetTickCount();
+                Buffer_Verify();
+                pc.printf("%s", compl_menu);
+                pc.printf("DMA %d cycles, %d loop executions\n\r", TC_count, loop);
+                pc.printf("Elapsed time %d ms\n\r\n\r", elapsedTime);
+
+                while(1);   // Halt program
+            }
+        }
+        
+        if (GPDMA_IntGetStatus(GPDMA_STAT_INTERR, 0)){
+            // Clear error counter Interrupt pending
+            GPDMA_ClearIntPending (GPDMA_STATCLR_INTERR, 0);
+            pc.printf("DMA Error detected.\n\r");
+            while(1);       // Halt program
+        }
+    }
+}
+
+
+/*********************************************************************//**
+ * @brief        Verify buffer
+ * @param[in]    None
+ * @return       None
+ **********************************************************************/
+void Buffer_Verify(void)
+{
+    uint8_t i;
+    uint32_t *src_addr = (uint32_t *)DMASrc_Buffer;
+    uint32_t *dest_addr = (uint32_t *)DMADest_Buffer;
+
+    for ( i = 0; i < DMA_SIZE; i++ )
+    {
+        if ( *src_addr++ != *dest_addr++ )
+        {
+            pc.printf("Verrify Error!.\n\r");
+        }
+    }
+}
+
+
+/*-------------------------MAIN FUNCTION--------------------------------*/
+/*********************************************************************//**
+ * @brief        c_entry: Main program body
+ * @param[in]    None
+ * @return       int
+ **********************************************************************/
+int c_entry(void)
+{
+    pc.baud(9600);
+
+    // print welcome screen
+    pc.printf("%s", menu);
+
+    /* Disable GPDMA interrupt */
+    NVIC_DisableIRQ(DMA_IRQn);
+    /* preemption = 1, sub-priority = 1 */
+    NVIC_SetPriority(DMA_IRQn, ((0x01<<3)|0x01));
+
+    /* Initialize GPDMA controller */
+    GPDMA_Init();
+
+    // Setup GPDMA channel --------------------------------
+    // channel 0
+    GPDMACfg.ChannelNum = 0;
+    // Source memory
+    GPDMACfg.SrcMemAddr = (uint32_t)DMASrc_Buffer;
+    // 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 - unused
+    GPDMACfg.DMALLI = 0;
+    // Setup channel with given parameter
+    GPDMA_Setup(&GPDMACfg);
+
+    /* Enable GPDMA interrupt */
+    NVIC_EnableIRQ(DMA_IRQn);
+    
+    pc.printf("Start transfer...\n\r");
+    GetTickCount_Start();
+    
+    // Enable GPDMA channel 0
+    GPDMA_ChannelCmd(0, ENABLE);
+
+    /* Wait for GPDMA processing complete */
+    while (1) {
+        loop++;
+    }
+
+    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
+
+/*
+ * @}
+ */