Diff: SSP/TI/ti_test.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SSP/TI/ti_test.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,662 @@
+/***********************************************************************//**
+ * @file		ti_test.c
+ * @purpose		This example describes how to use SPP using TI frame format
+ * 			  	(interrupt 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_ssp.h"
+#include "lpc17xx_libcfg.h"
+#include "lpc17xx_pinsel.h"
+#include "debug_frmwrk.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup SSP_TI	TI
+ * @ingroup SSP_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINITIONS ***********************/
+/* 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
+
+#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
+
+/************************** 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 - 115.200 kbps \n\r"
+" This example uses two SSP peripherals in TI 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 interrupt mode \n\r"
+"********************************************************************************\n\r";
+uint8_t menu2[] = "Demo terminated! \n\r";
+
+// SSP Configuration structure variable
+SSP_CFG_Type SSP_ConfigStruct;
+
+/* These variable below are used in Master SSP interrupt mode -------------------- */
+/* Read data pointer */
+uint8_t *pRdBuf_M;
+/* Write data pointer */
+uint8_t *pWrBuf_M;
+/* Index of read data mode */
+uint32_t RdIdx_M;
+/* Index of write data mode */
+uint32_t WrIdx_M;
+/* Length of data */
+uint32_t DatLen_M;
+/* Status Flag indicates current SSP transmission complete or not */
+__IO Bool complete_M;
+/* Master Tx Buffer */
+uint8_t Master_Tx_Buf[BUFFER_SIZE];
+/* Master Rx Buffer */
+uint8_t Master_Rx_Buf[BUFFER_SIZE];
+
+
+/* These variable below are used in Slave SSP interrupt mode -------------------- */
+/* Read data pointer */
+uint8_t *pRdBuf_S;
+/* Write data pointer */
+uint8_t *pWrBuf_S;
+/* Index of read data mode */
+uint32_t RdIdx_S;
+/* Index of write data mode */
+uint32_t WrIdx_S;
+/* Length of data */
+uint32_t DatLen_S;
+/* Status Flag indicates current SSP transmission complete or not */
+__IO Bool complete_S;
+/* Slave Tx Buffer */
+uint8_t Slave_Tx_Buf[BUFFER_SIZE];
+/* Slave Rx Buffer */
+uint8_t Slave_Rx_Buf[BUFFER_SIZE];
+
+
+/************************** PRIVATE FUNCTIONS *************************/
+void SSP0_IRQHandler(void);
+void SSP1_IRQHandler(void);
+void ssp_Master_IntHandler(void);
+void ssp_Slave_IntHandler(void);
+
+int32_t ssp_MasterReadWrite (LPC_SSP_TypeDef *SSPx,
+	                 void *rbuffer,
+	                 void *wbuffer,
+	                 uint32_t length);
+int32_t ssp_SlaveReadWrite (LPC_SSP_TypeDef *SSPx,
+	                 void *rbuffer,
+	                 void *wbuffer,
+	                 uint32_t length);
+void print_menu(void);
+void Buffer_Init(void);
+void Buffer_Verify(void);
+void Error_Loop(void);
+
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+/*********************************************************************//**
+ * @brief 		SSP Master Interrupt sub-routine used for reading
+ * 				and writing handler
+ * @param		None
+ * @return 		None
+ ***********************************************************************/
+void ssp_Master_IntHandler(void)
+{
+	uint16_t tmp;
+
+	/* Clear all interrupt */
+	SSP_ClearIntPending(SSPDEV_M, SSP_INTCLR_ROR);
+	SSP_ClearIntPending(SSPDEV_M, SSP_INTCLR_RT);
+
+	/* check if RX FIFO contains data */
+	while (SSP_GetStatus(SSPDEV_M, SSP_STAT_RXFIFO_NOTEMPTY) == SET)
+	{
+		tmp = SSP_ReceiveData(SSPDEV_M);
+		if ((pRdBuf_M!= NULL) && (RdIdx_M < DatLen_M))
+		{
+			*(pRdBuf_M + RdIdx_M) = (uint8_t) tmp;
+		}
+		RdIdx_M++;
+	}
+
+	/* Check if TX FIFO is not full */
+	while ((SSP_GetStatus(SSPDEV_M, SSP_STAT_TXFIFO_NOTFULL) == SET)
+			&& (WrIdx_M < DatLen_M))
+	{
+		/* check if RX FIFO contains data */
+		while (SSP_GetStatus(SSPDEV_M, SSP_STAT_RXFIFO_NOTEMPTY) == SET)
+		{
+			tmp = SSP_ReceiveData(SSPDEV_M);
+			if ((pRdBuf_M!= NULL) && (RdIdx_M < DatLen_M))
+			{
+				*(pRdBuf_M + RdIdx_M) = (uint8_t) tmp;
+			}
+			RdIdx_M++;
+		}
+
+		if (pWrBuf_M != NULL)
+		{
+			SSP_SendData(SSPDEV_M, (uint16_t)(*(pWrBuf_M + WrIdx_M)));
+		}
+		else
+		{
+			SSP_SendData(SSPDEV_M, IDLE_CHAR);
+		}
+		WrIdx_M++;
+	}
+
+	/* There're more data to send */
+	if (WrIdx_M < DatLen_M)
+	{
+		SSP_IntConfig(SSPDEV_M, SSP_INTCFG_TX, ENABLE);
+	}
+	/* Otherwise */
+	else
+	{
+		SSP_IntConfig(SSPDEV_M, SSP_INTCFG_TX, DISABLE);
+	}
+
+	/* There're more data to receive */
+	if (RdIdx_M < DatLen_M)
+	{
+		SSP_IntConfig(SSPDEV_M, SSP_INTCFG_ROR, ENABLE);
+		SSP_IntConfig(SSPDEV_M, SSP_INTCFG_RT, ENABLE);
+		SSP_IntConfig(SSPDEV_M, SSP_INTCFG_RX, ENABLE);
+	}
+	/* Otherwise */
+	else
+	{
+		SSP_IntConfig(SSPDEV_M, SSP_INTCFG_ROR, DISABLE);
+		SSP_IntConfig(SSPDEV_M, SSP_INTCFG_RT, DISABLE);
+		SSP_IntConfig(SSPDEV_M, SSP_INTCFG_RX, DISABLE);
+	}
+
+	/* Set Flag if both Read and Write completed */
+	if ((WrIdx_M == DatLen_M) && (RdIdx_M == DatLen_M))
+	{
+		complete_M = TRUE;
+	}
+}
+
+
+
+/*********************************************************************//**
+ * @brief 		SSP Slave Interrupt sub-routine used for reading
+ * 				and writing handler
+ * @param		None
+ * @return 		None
+ ***********************************************************************/
+void ssp_Slave_IntHandler(void)
+{
+	uint16_t tmp;
+
+	/* Clear all interrupt */
+	SSP_ClearIntPending(SSPDEV_S, SSP_INTCLR_ROR);
+	SSP_ClearIntPending(SSPDEV_S, SSP_INTCLR_RT);
+
+	/* check if RX FIFO contains data */
+	while (SSP_GetStatus(SSPDEV_S, SSP_STAT_RXFIFO_NOTEMPTY) == SET)
+	{
+		tmp = SSP_ReceiveData(SSPDEV_S);
+		if ((pRdBuf_S!= NULL) && (RdIdx_S < DatLen_S))
+		{
+			*(pRdBuf_S + RdIdx_S) = (uint8_t) tmp;
+		}
+		RdIdx_S++;
+	}
+
+	/* Check if TX FIFO is not full */
+	while ((SSP_GetStatus(SSPDEV_S, SSP_STAT_TXFIFO_NOTFULL) == SET)
+			&& (WrIdx_S < DatLen_S))
+	{
+		/* check if RX FIFO contains data */
+		while (SSP_GetStatus(SSPDEV_S, SSP_STAT_RXFIFO_NOTEMPTY) == SET)
+		{
+			tmp = SSP_ReceiveData(SSPDEV_S);
+			if ((pRdBuf_S!= NULL) && (RdIdx_S < DatLen_S))
+			{
+				*(pRdBuf_S + RdIdx_S) = (uint8_t) tmp;
+			}
+			RdIdx_S++;
+		}
+
+		if (pWrBuf_S != NULL)
+		{
+			SSP_SendData(SSPDEV_S, (uint16_t)(*(pWrBuf_S + WrIdx_S)));
+		}
+		else
+		{
+			SSP_SendData(SSPDEV_S, IDLE_CHAR);
+		}
+		WrIdx_S++;
+	}
+
+	/* There're more data to send */
+	if (WrIdx_S < DatLen_S)
+	{
+		SSP_IntConfig(SSPDEV_S, SSP_INTCFG_TX, ENABLE);
+	}
+	/* Otherwise */
+	else
+	{
+		SSP_IntConfig(SSPDEV_S, SSP_INTCFG_TX, DISABLE);
+	}
+
+	/* There're more data to receive */
+	if (RdIdx_S < DatLen_S)
+	{
+		SSP_IntConfig(SSPDEV_S, SSP_INTCFG_ROR, ENABLE);
+		SSP_IntConfig(SSPDEV_S, SSP_INTCFG_RT, ENABLE);
+		SSP_IntConfig(SSPDEV_S, SSP_INTCFG_RX, ENABLE);
+	}
+	/* Otherwise */
+	else
+	{
+		SSP_IntConfig(SSPDEV_S, SSP_INTCFG_ROR, DISABLE);
+		SSP_IntConfig(SSPDEV_S, SSP_INTCFG_RT, DISABLE);
+		SSP_IntConfig(SSPDEV_S, SSP_INTCFG_RX, DISABLE);
+	}
+
+	/* Set Flag if both Read and Write completed */
+	if ((WrIdx_S == DatLen_S) && (RdIdx_S == DatLen_S))
+	{
+		complete_S = TRUE;
+	}
+}
+
+
+/*********************************************************************//**
+ * @brief 		SSP0 Interrupt used for reading and writing handler
+ * @param		None
+ * @return 		None
+ ***********************************************************************/
+void SSP0_IRQHandler(void)
+{
+#if (USEDSSPDEV_M == 0)
+	ssp_Master_IntHandler();
+#endif
+
+#if (USEDSSPDEV_S == 0)
+	ssp_Slave_IntHandler();
+#endif
+}
+
+/*********************************************************************//**
+ * @brief 		SSP1 Interrupt used for reading and writing handler
+ * @param		None
+ * @return 		None
+ ***********************************************************************/
+void SSP1_IRQHandler(void)
+{
+#if (USEDSSPDEV_M == 1)
+	ssp_Master_IntHandler();
+#endif
+
+#if (USEDSSPDEV_S == 1)
+	ssp_Slave_IntHandler();
+#endif
+}
+
+
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+/*********************************************************************//**
+ * @brief 		SSP Read write in polling mode function (Master mode)
+ * @param[in]	SSPdev: Pointer to SSP device
+ * @param[out]	rbuffer: pointer to read buffer
+ * @param[in]	wbuffer: pointer to write buffer
+ * @param[in]	length: length of data to read and write
+ * @return 		0 if there no data to send, otherwise return 1
+ ***********************************************************************/
+int32_t ssp_MasterReadWrite (LPC_SSP_TypeDef *SSPx,
+	                 void *rbuffer,
+	                 void *wbuffer,
+	                 uint32_t length)
+{
+	uint16_t tmp;
+	pRdBuf_M = (uint8_t *) rbuffer;
+    pWrBuf_M = (uint8_t *) wbuffer;
+    DatLen_M = length;
+    RdIdx_M = 0;
+    WrIdx_M = 0;
+
+    // wait for current SSP activity complete
+    while (SSP_GetStatus(SSPx, SSP_STAT_BUSY));
+
+	/* Clear all remaining data in RX FIFO */
+	while (SSP_GetStatus(SSPx, SSP_STAT_RXFIFO_NOTEMPTY))
+	{
+		tmp = SSP_ReceiveData(SSPx);
+	}
+
+#if (USEDSSPDEV_M == 0)
+	if (length != 0)
+	{
+		SSP0_IRQHandler();
+	}
+#endif
+#if (USEDSSPDEV_M == 1)
+	if (length != 0)
+	{
+		SSP1_IRQHandler();
+	}
+#endif
+
+	// Return 0
+	return 0;
+}
+
+/*********************************************************************//**
+ * @brief 		SSP Read write in polling mode function (Slave mode)
+ * @param[in]	SSPdev: Pointer to SSP device
+ * @param[out]	rbuffer: pointer to read buffer
+ * @param[in]	wbuffer: pointer to write buffer
+ * @param[in]	length: length of data to read and write
+ * @return 		0 if there no data to send, otherwise return 1
+ ***********************************************************************/
+int32_t ssp_SlaveReadWrite (LPC_SSP_TypeDef *SSPx,
+	                 void *rbuffer,
+	                 void *wbuffer,
+	                 uint32_t length)
+{
+	uint16_t tmp;
+	pRdBuf_S = (uint8_t *) rbuffer;
+    pWrBuf_S = (uint8_t *) wbuffer;
+    DatLen_S = length;
+    RdIdx_S = 0;
+    WrIdx_S = 0;
+
+    // wait for current SSP activity complete
+    while (SSP_GetStatus(SSPx, SSP_STAT_BUSY))
+    {
+    	tmp = SSP_ReceiveData(SSPx);
+    }
+
+	/* Clear all remaining data in RX FIFO */
+	while (SSP_GetStatus(SSPx, SSP_STAT_RXFIFO_NOTEMPTY))
+	{
+		tmp = SSP_ReceiveData(SSPx);
+	}
+#if (USEDSSPDEV_S == 0)
+	if (length != 0)
+	{
+		SSP0_IRQHandler();
+	}
+#endif
+#if (USEDSSPDEV_S == 1)
+	if (length != 0)
+	{
+		SSP1_IRQHandler();
+	}
+#endif
+
+	// Return 0
+	return 0;
+}
+
+
+/*********************************************************************//**
+ * @brief		Initialize buffer
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void Buffer_Init(void)
+{
+	uint8_t i;
+
+	for (i = 0; i < BUFFER_SIZE; i++) {
+		Master_Tx_Buf[i] = i;
+		Slave_Tx_Buf[i] = i;
+		Master_Rx_Buf[i] = 0;
+		Slave_Rx_Buf[i] = 0;
+	}
+
+}
+
+/*********************************************************************//**
+ * @brief		Verify buffer
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void Buffer_Verify(void)
+{
+	uint8_t i;
+	uint8_t *pMTx = (uint8_t *) &Master_Tx_Buf[0];
+	uint8_t *pSTx = (uint8_t *) &Slave_Tx_Buf[0];
+	uint8_t *pMRx = (uint8_t *) &Master_Rx_Buf[0];
+	uint8_t *pSRx = (uint8_t *) &Slave_Rx_Buf[0];
+
+	for ( i = 0; i < BUFFER_SIZE; i++ )
+	{
+		if ((*pSRx++ != *pMTx++) || (*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 TI program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	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 TI frame format
+	SSP_ConfigStruct.FrameFormat = SSP_FRAME_TI;
+	// 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 TI frame format
+	SSP_ConfigStruct.FrameFormat = SSP_FRAME_TI;
+	// Initialize SSP peripheral with parameter given in structure above
+	SSP_Init(SSPDEV_S, &SSP_ConfigStruct);
+
+	// Enable SSP peripheral
+	SSP_Cmd(SSPDEV_S, ENABLE);
+
+	/* Interrupt configuration section ------------------------------------------------- */
+#if ((USEDSSPDEV_S == 0) || (USEDSSPDEV_M == 0))
+	/* preemption = 1, sub-priority = 1 */
+	NVIC_SetPriority(SSP0_IRQn, ((0x01<<3)|0x01));
+	/* Enable SSP0 interrupt */
+	NVIC_EnableIRQ(SSP0_IRQn);
+#endif
+#if ((USEDSSPDEV_S == 1) || (USEDSSPDEV_M == 1))
+	/* preemption = 1, sub-priority = 1 */
+	NVIC_SetPriority(SSP1_IRQn, ((0x01<<3)|0x01));
+	/* Enable SSP0 interrupt */
+	NVIC_EnableIRQ(SSP1_IRQn);
+#endif
+
+	/* Initializing Buffer section ------------------------------------------------- */
+	Buffer_Init();
+
+	/* Start Transmit/Receive between Master and Slave ----------------------------- */
+	complete_S = FALSE;
+	complete_M = FALSE;
+
+	/* Slave must be ready first */
+	ssp_SlaveReadWrite(SSPDEV_S, Slave_Rx_Buf, Slave_Tx_Buf, BUFFER_SIZE);
+	/* Then Master can start its transferring */
+	ssp_MasterReadWrite(SSPDEV_M, Master_Rx_Buf, Master_Tx_Buf, BUFFER_SIZE);
+
+	/* Wait for complete */
+	while ((complete_S == FALSE) || (complete_M == FALSE));
+
+	/* 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
+
+/*
+ * @}
+ */