Diff: I2C/sc16is750_polling/i2c_polling_test.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2C/sc16is750_polling/i2c_polling_test.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,325 @@
+/***********************************************************************//**
+ * @file		i2c_polling_test.c
+ * @purpose		An example of I2C using polling mode to test the I2C driver.
+ * 				Using I2C at mode I2C master/8bit on LPC1766 to communicate with
+ * 				SC16IS750/760 Demo Board
+ * @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_i2c.h"
+#include "lpc17xx_libcfg.h"
+#include "lpc17xx_pinsel.h"
+#include "debug_frmwrk.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup I2C_sc16is750_polling	sc16is750_polling
+ * @ingroup I2C_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINITIONS *************************/
+/** Used I2C device definition, should be 0 or 2 */
+#define USEDI2CDEV	0
+
+/* Definition of internal register of SC16IS750/760 */
+#define IODIR		0x0A
+#define IOSTATE		0x0B
+#define IOCON		0x0E
+#define SLVADDR		(0x90>>1)
+#define REGS_ADDR(n) (n<<3)
+
+#if (USEDI2CDEV == 0)
+#define I2CDEV LPC_I2C0
+#elif (USEDI2CDEV == 2)
+#define I2CDEV LPC_I2C2
+#else
+#error "I2C device not defined!"
+#endif
+
+/************************** PRIVATE VARIABLES *************************/
+uint8_t menu1[] =
+"********************************************************************************\n\r"
+"Hello NXP Semiconductors \n\r"
+"I2C demo \n\r"
+"\t - MCU: LPC17xx \n\r"
+"\t - Core: ARM Cortex-M3 \n\r"
+"\t - Communicate via: UART0 - 115.2 kbps \n\r"
+" An example of I2C using polling mode to test the I2C driver \n\r"
+" Using I2C at mode I2C master/8bit on LPC1766 to communicate with \n\r"
+" SC16IS750/760 Demo Board \n\r"
+" Press '1' to turn ON, '2' to turn OFF LEDs \n\r"
+"********************************************************************************\n\r";
+uint8_t menu2[] = "Demo terminated! \n\r";
+
+/* Define array data with match data to set internal register value of SC16IS740/750/760 */
+uint8_t iocon_cfg[2] = {REGS_ADDR(IOCON), 0x00};
+uint8_t iodir_cfg[2] = {REGS_ADDR(IODIR), 0xFF};
+uint8_t iostate_cfg_0[2] = {REGS_ADDR(IOSTATE), 0x00};
+uint8_t iostate_cfg_1[2] = {REGS_ADDR(IOSTATE), 0xFF};
+
+
+/************************** PRIVATE FUNCTIONS *************************/
+void print_menu(void);
+void Error_Loop(uint32_t ErrorCode);
+
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+/*********************************************************************//**
+ * @brief		Print Welcome menu
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void print_menu(void)
+{
+	_DBG_(menu1);
+}
+
+
+/*********************************************************************//**
+ * @brief		A subroutine that will be called if there's any error
+ * 				on I2C operation
+ * @param[in]	ErrorCode Error Code Input
+ * @return 		None
+ **********************************************************************/
+void Error_Loop(uint32_t ErrorCode)
+{
+	uint32_t test;
+
+	// for testing purpose
+	test = ErrorCode;
+	/*
+	 * Insert your code here...
+	 */
+	while(1);
+}
+
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	uint8_t tmpchar[2] = {0, 0};
+	__IO FlagStatus exitflag;
+	PINSEL_CFG_Type PinCfg;
+	I2C_M_SETUP_Type transferCfg;
+	uint8_t SC16IS_RegStat;
+
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	// print welcome screen
+	print_menu();
+
+	/*
+	 * Init I2C pin connect
+	 */
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+#if (USEDI2CDEV == 0)
+	PinCfg.Funcnum = 1;
+	PinCfg.Pinnum = 27;
+	PinCfg.Portnum = 0;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 28;
+	PINSEL_ConfigPin(&PinCfg);
+#elif (USEDI2CDEV == 2)
+	PinCfg.Funcnum = 2;
+	PinCfg.Pinnum = 10;
+	PinCfg.Portnum = 0;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 11;
+	PINSEL_ConfigPin(&PinCfg);
+#endif
+
+	/* I2C block ------------------------------------------------------------------- */
+	// Initialize I2C peripheral
+	I2C_Init(I2CDEV, 100000);
+
+	/* Enable I2C1 operation */
+	I2C_Cmd(I2CDEV, ENABLE);
+
+	/* Configure SC16IS750 ---------------------------------------------------------- */
+	/* First, send some command to reset SC16IS740 chip via I2C bus interface */
+	transferCfg.sl_addr7bit = SLVADDR;
+	transferCfg.tx_data = (uint8_t *)iocon_cfg;
+	transferCfg.tx_length = sizeof(iocon_cfg);
+	transferCfg.rx_data = NULL;
+	transferCfg.rx_length = 0;
+	transferCfg.retransmissions_max = 2;
+	if (I2C_MasterTransferData(I2CDEV, &transferCfg, I2C_TRANSFER_POLLING) \
+			== ERROR){
+		Error_Loop(transferCfg.status);
+	}
+
+	transferCfg.sl_addr7bit = SLVADDR;
+	transferCfg.tx_data = (uint8_t *)iodir_cfg;
+	transferCfg.tx_length = sizeof(iodir_cfg);
+	transferCfg.rx_data = NULL;
+	transferCfg.rx_length = 0;
+	transferCfg.retransmissions_max = 2;
+	if (I2C_MasterTransferData(I2CDEV, &transferCfg, I2C_TRANSFER_POLLING) \
+			== ERROR){
+		Error_Loop(transferCfg.status);
+	}
+
+	transferCfg.sl_addr7bit = SLVADDR;
+	transferCfg.tx_data = (uint8_t *)iostate_cfg_0;
+	transferCfg.tx_length = sizeof(iostate_cfg_0);
+	transferCfg.rx_data = NULL;
+	transferCfg.rx_length = 0;
+	transferCfg.retransmissions_max = 2;
+	if (I2C_MasterTransferData(I2CDEV, &transferCfg, I2C_TRANSFER_POLLING) \
+			== ERROR){
+		Error_Loop(transferCfg.status);
+	}
+
+
+	/* Validate value of SC16IS750 register ------------------------------------------ */
+	/* This section will dump out value of register that set through I2C bus */
+
+	transferCfg.sl_addr7bit = SLVADDR;
+	transferCfg.tx_data = (uint8_t *)iocon_cfg;
+	transferCfg.tx_length = 1;
+	transferCfg.rx_data = (uint8_t *)&SC16IS_RegStat;
+	transferCfg.rx_length = 1;
+	transferCfg.retransmissions_max = 2;
+	if (I2C_MasterTransferData(I2CDEV, &transferCfg, I2C_TRANSFER_POLLING) \
+			== ERROR){
+		Error_Loop(transferCfg.status);
+	}
+
+	transferCfg.sl_addr7bit = SLVADDR;
+	transferCfg.tx_data = (uint8_t *)iodir_cfg;
+	transferCfg.tx_length = 1;
+	transferCfg.rx_data = (uint8_t *)&SC16IS_RegStat;
+	transferCfg.rx_length = 1;
+	transferCfg.retransmissions_max = 2;
+	if (I2C_MasterTransferData(I2CDEV, &transferCfg, I2C_TRANSFER_POLLING) \
+			== ERROR){
+		Error_Loop(transferCfg.status);
+	}
+
+	transferCfg.sl_addr7bit = SLVADDR;
+	transferCfg.tx_data = (uint8_t *)iostate_cfg_0;
+	transferCfg.tx_length = 1;
+	transferCfg.rx_data = (uint8_t *)&SC16IS_RegStat;
+	transferCfg.rx_length = 1;
+	transferCfg.retransmissions_max = 2;
+	if (I2C_MasterTransferData(I2CDEV, &transferCfg, I2C_TRANSFER_POLLING) \
+			== ERROR){
+		Error_Loop(transferCfg.status);
+	}
+
+	// Reset exit flag
+	exitflag = RESET;
+
+    /* Read some data from the buffer */
+    while (exitflag == RESET){
+
+    	while((tmpchar[0] = _DG) == 0);
+
+    	if (tmpchar[0] == 27){
+			/* ESC key, set exit flag */
+			_DBG_(menu2);
+			exitflag = SET;
+		}
+		else if (tmpchar[0] == 'r'){
+			print_menu();
+		}
+		else{
+			if (tmpchar[0] == '1'){
+				// LEDs are ON now...
+				transferCfg.sl_addr7bit = SLVADDR;
+				transferCfg.tx_data = (uint8_t *)iostate_cfg_0;
+				transferCfg.tx_length = sizeof(iostate_cfg_0);
+				transferCfg.rx_data = NULL;
+				transferCfg.rx_length = 0;
+				transferCfg.retransmissions_max = 2;
+				if (I2C_MasterTransferData(I2CDEV, &transferCfg, I2C_TRANSFER_POLLING) \
+						== ERROR){
+					Error_Loop(transferCfg.status);
+				}
+			}
+			else if (tmpchar[0] == '2')
+			{
+				// LEDs are OFF now...
+				transferCfg.sl_addr7bit = SLVADDR;
+				transferCfg.tx_data = (uint8_t *)iostate_cfg_1;
+				transferCfg.tx_length = sizeof(iostate_cfg_1);
+				transferCfg.rx_data = NULL;
+				transferCfg.rx_length = 0;
+				transferCfg.retransmissions_max = 2;
+				if (I2C_MasterTransferData(I2CDEV, &transferCfg, I2C_TRANSFER_POLLING) \
+						== ERROR){
+					Error_Loop(transferCfg.status);
+				}
+			}
+			/* Then Echo it back */
+			_DBG_(tmpchar);
+		}
+    }
+
+    // wait for current transmission complete - THR must be empty
+    while (UART_CheckBusy(LPC_UART0)==SET);
+
+    // DeInitialize UART0 peripheral
+    UART_DeInit(LPC_UART0);
+    I2C_DeInit(I2CDEV);
+    /* 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
+
+/*
+ * @}
+ */