Diff: SSP/MicroWire/microwire_test.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SSP/MicroWire/microwire_test.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,418 @@
+/***********************************************************************//**
+ * @file		microwire_test.c
+ * @purpose		This example describes how to use SPP peripheral in
+ * 			  	MicroWire frame format.
+ * @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_ssp.h"
+#include "lpc17xx_libcfg.h"
+#include "lpc17xx_pinsel.h"
+#include "debug_frmwrk.h"
+#include "lpc17xx_pinsel.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup SSP_MicroWire	MicroWire
+ * @ingroup SSP_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINTIONS *************************/
+/* Idle char */
+#define IDLE_CHAR	0xFF
+
+/** Used SSP device as master definition */
+#define USEDSSPDEV_M		0
+
+/** Used SSP device as slave definition */
+#define USEDSSPDEV_S		1
+
+/** Max buffer length */
+#define BUFFER_SIZE			0x40
+
+/* These macro below is used in MiroWire Frame Format.
+ * Since master in MicroWire Frame Format must send a Operation Command
+ * to slave before each transmission between master and slave
+ */
+/* Write command */
+#define MicroWire_WR_CMD	((uint8_t)(0x00))
+/* Read command */
+#define MicroWire_RD_CMD	((uint8_t)(0x01))
+
+
+#if (USEDSSPDEV_M == USEDSSPDEV_S)
+#error "Master and Slave SSP device are duplicated!"
+#endif
+
+#if (USEDSSPDEV_M == 0)
+#define SSPDEV_M LPC_SSP0
+#elif (USEDSSPDEV_M == 1)
+#define SSPDEV_M LPC_SSP1
+#elif
+#error "Master SSP device not defined!"
+#endif
+
+#if (USEDSSPDEV_S == 0)
+#define SSPDEV_S LPC_SSP0
+#elif (USEDSSPDEV_S == 1)
+#define SSPDEV_S LPC_SSP1
+#elif
+#error "Slave SSP device not defined!"
+#endif
+
+/* These variable below are used in Master SSP -------------------- */
+/* Read data pointer */
+uint8_t *pRdBuf_M;
+/* Index of read data mode */
+uint32_t RdIdx_M;
+/* Length of data */
+uint32_t DatLen_M;
+/* Master Rx Buffer */
+uint8_t Master_Rx_Buf[BUFFER_SIZE];
+
+
+/* These variable below are used in Slave SSP -------------------- */
+/* Write data pointer */
+uint8_t *pWrBuf_S;
+/* Index of write data mode */
+uint32_t WrIdx_S;
+/* Length of data */
+uint32_t DatLen_S;
+/* Slave Tx Buffer */
+uint8_t Slave_Tx_Buf[BUFFER_SIZE];
+/* Last command */
+uint8_t Last_cmd;
+
+/************************** PRIVATE VARIABLES *************************/
+uint8_t menu1[] =
+"********************************************************************************\n\r"
+"Hello NXP Semiconductors \n\r"
+"SSP 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 uses two SSP peripherals in MicroWire frame format \n\r"
+" \t one is set as master mode and the other is set as slave mode. \n\r"
+"\t The master and slave transfer a number of data bytes together \n\r"
+"\t in polling mode \n\r"
+"********************************************************************************\n\r";
+
+// SSP Configuration structure variable
+SSP_CFG_Type SSP_ConfigStruct;
+
+/************************** PRIVATE FUNCTIONS *************************/
+void ssp_MW_SendCMD(LPC_SSP_TypeDef *SSPx, uint8_t cmd);
+uint16_t ssp_MW_GetRSP(LPC_SSP_TypeDef *SSPx);
+uint8_t ssp_MW_GetCMD(LPC_SSP_TypeDef *SSPx);
+void ssp_MW_SendRSP(LPC_SSP_TypeDef *SSPx, uint16_t Rsp);
+void print_menu(void);
+void Buffer_Init(void);
+void Buffer_Verify(void);
+void Error_Loop(void);
+
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+/*********************************************************************//**
+ * @brief		Send command to slave in master mode
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void ssp_MW_SendCMD(LPC_SSP_TypeDef *SSPx, uint8_t cmd)
+{
+	// wait for current SSP activity complete
+	while (SSP_GetStatus(SSPx, SSP_STAT_BUSY) ==  SET);
+
+	SSP_SendData(SSPx, (uint16_t) cmd);
+}
+
+/*********************************************************************//**
+ * @brief		Get respond from slave after sending a command in master mode
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+uint16_t ssp_MW_GetRSP(LPC_SSP_TypeDef *SSPx)
+{
+	while (SSP_GetStatus(SSPx, SSP_STAT_RXFIFO_NOTEMPTY) == RESET);
+	return (SSP_ReceiveData(SSPx));
+}
+
+/*********************************************************************//**
+ * @brief		Get command from master in slave mode
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+uint8_t ssp_MW_GetCMD(LPC_SSP_TypeDef *SSPx)
+{
+	// Wait for coming CMD
+	while (SSP_GetStatus(SSPx, SSP_STAT_RXFIFO_NOTEMPTY) == RESET);
+
+	return ((uint8_t)(SSP_ReceiveData(SSPx)));
+}
+
+/*********************************************************************//**
+ * @brief		Send respond to master in slave mode
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void ssp_MW_SendRSP(LPC_SSP_TypeDef *SSPx, uint16_t Rsp)
+{
+	// wait for current SSP activity complete
+	while (SSP_GetStatus(SSPx, SSP_STAT_BUSY) ==  SET);
+
+	SSP_SendData(SSPx, Rsp);
+}
+
+/*********************************************************************//**
+ * @brief		Initialize buffer
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void Buffer_Init(void)
+{
+	uint8_t i;
+
+	for (i = 0; i < BUFFER_SIZE; i++) {
+		Slave_Tx_Buf[i] = i;
+		Master_Rx_Buf[i] = 0;
+	}
+
+}
+
+/*********************************************************************//**
+ * @brief		Verify buffer
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void Buffer_Verify(void)
+{
+	uint8_t i;
+	uint8_t *pSTx = (uint8_t *) &Slave_Tx_Buf[0];
+	uint8_t *pMRx = (uint8_t *) &Master_Rx_Buf[0];
+
+	for ( i = 0; i < BUFFER_SIZE; i++ )
+	{
+		if (*pMRx++ != *pSTx++)
+		{
+			/* Call Error Loop */
+			Error_Loop();
+		}
+	}
+}
+
+/*********************************************************************//**
+ * @brief		Error Loop (called by Buffer_Verify() if any error)
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void Error_Loop(void)
+{
+	/* Loop forever */
+	_DBG_("Verify fail!\n\r");
+	while (1);
+}
+
+/*********************************************************************//**
+ * @brief		Print Welcome menu
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void print_menu(void)
+{
+	_DBG(menu1);
+}
+
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main MICROWIRE program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	uint32_t cnt;
+	PINSEL_CFG_Type PinCfg;
+
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	// print welcome screen
+	print_menu();
+
+	/*
+	 * Initialize SSP pin connect
+	 * P0.6 - SSEL1
+	 * P0.7 - SCK1
+	 * P0.8 - MISO1
+	 * P0.9 - MOSI1
+	 */
+	PinCfg.Funcnum = 2;
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+	PinCfg.Portnum = 0;
+	PinCfg.Pinnum = 6;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 7;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 8;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 9;
+	PINSEL_ConfigPin(&PinCfg);
+
+
+	/*
+	 * Initialize SSP pin connect
+	 * P0.15 - SCK
+	 * P0.16 - SSEL
+	 * P0.17 - MISO
+	 * P0.18 - MOSI
+	 */
+	PinCfg.Funcnum = 2;
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+	PinCfg.Portnum = 0;
+	PinCfg.Pinnum = 15;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 17;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 18;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 16;
+	PINSEL_ConfigPin(&PinCfg);
+
+
+	/* Initializing Master SSP device section ------------------------------------------- */
+	// initialize SSP configuration structure to default
+	SSP_ConfigStructInit(&SSP_ConfigStruct);
+	// Re-configure SSP to MicroWire frame format
+	SSP_ConfigStruct.FrameFormat = SSP_FRAME_MICROWIRE;
+	// Initialize SSP peripheral with parameter given in structure above
+	SSP_Init(SSPDEV_M, &SSP_ConfigStruct);
+
+	// Enable SSP peripheral
+	SSP_Cmd(SSPDEV_M, ENABLE);
+
+
+    /* Initializing Slave SSP device section ------------------------------------------- */
+	// initialize SSP configuration structure to default
+	SSP_ConfigStructInit(&SSP_ConfigStruct);
+	/* Re-configure mode for SSP device */
+	SSP_ConfigStruct.Mode = SSP_SLAVE_MODE;
+	// Re-configure SSP to MicroWire frame format
+	SSP_ConfigStruct.FrameFormat = SSP_FRAME_MICROWIRE;
+	// Initialize SSP peripheral with parameter given in structure above
+	SSP_Init(SSPDEV_S, &SSP_ConfigStruct);
+
+	// Enable SSP peripheral
+	SSP_Cmd(SSPDEV_S, ENABLE);
+
+
+	/* Initializing Buffer section ------------------------------------------------- */
+	Buffer_Init();
+
+	/* Start Transmit/Receive between Master and Slave ----------------------------- */
+	pRdBuf_M = (uint8_t *)&Master_Rx_Buf[0];
+	RdIdx_M = 0;
+	DatLen_M = BUFFER_SIZE;
+	pWrBuf_S = (uint8_t *)&Slave_Tx_Buf[0];
+	WrIdx_S = 0;
+	DatLen_S = BUFFER_SIZE;
+	/* Force Last command to Read command as default */
+	Last_cmd = MicroWire_RD_CMD;
+
+	/* Clear all remaining data in RX FIFO */
+	while (SSP_GetStatus(SSPDEV_M, SSP_STAT_RXFIFO_NOTEMPTY))
+	{
+		SSP_ReceiveData(SSPDEV_M);
+	}
+	while (SSP_GetStatus(SSPDEV_S, SSP_STAT_RXFIFO_NOTEMPTY))
+	{
+		SSP_ReceiveData(SSPDEV_S);
+	}
+
+	for (cnt = 0; cnt < BUFFER_SIZE; cnt++)
+	{
+		/* The slave must initialize data in FIFO for immediately transfer from master
+		 * due to last received command
+		 */
+		if (Last_cmd == MicroWire_RD_CMD)
+		{
+			// Then send the respond to master, this contains data
+			ssp_MW_SendRSP(SSPDEV_S, (uint16_t) *(pWrBuf_S + WrIdx_S++));
+		}
+		else
+		{
+			// Then send the respond to master, this contains data
+			ssp_MW_SendRSP(SSPDEV_S, 0xFF);
+		}
+		/* Master must send a read command to slave,
+		 * the slave then respond with its data in FIFO
+		 */
+		ssp_MW_SendCMD(SSPDEV_M, MicroWire_RD_CMD);
+
+		// Master receive respond
+		*(pRdBuf_M + RdIdx_M++) = (uint8_t) ssp_MW_GetRSP(SSPDEV_M);
+
+		// Re-assign Last command
+		Last_cmd = ssp_MW_GetCMD(SSPDEV_S);
+	}
+
+	/* Verify buffer */
+	Buffer_Verify();
+
+	_DBG_("Verify success!\n\r");
+
+    /* 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
+
+/*
+ * @}
+ */