These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
UART/AutoBaud/uart_autobaud_test.c
- Committer:
- frank26080115
- Date:
- 2011-03-20
- Revision:
- 0:bf7b9fba3924
File content as of revision 0:bf7b9fba3924:
/***********************************************************************//** * @file uart_autobaud_test.c * @purpose This example describes how to configure UART using auto-baud * rate in 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_uart.h" #include "lpc17xx_libcfg.h" #include "lpc17xx_pinsel.h" /* Example group ----------------------------------------------------------- */ /** @defgroup UART_AutoBaud AutoBaud * @ingroup UART_Examples * @{ */ /************************** PRIVATE VARIABLES *************************/ uint8_t syncmenu[] = "AutoBaudrate Status: Synchronous! \n\r"; uint8_t menu1[] = "Hello NXP Semiconductors \n\r"; uint8_t menu2[] = "UART Auto Baudrate demo\n\r\t " "MCU LPC17xx - ARM Cortex-M3 \n\r\t " "UART0 - Auto Baud rate mode used \n\r"; uint8_t menu3[] = "UART demo terminated!\n"; /* Synchronous Flag */ __IO FlagStatus Synchronous; /************************** PRIVATE FUNCTIONS *************************/ void UART0_IRQHandler(void); void print_menu(void); /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ /*********************************************************************//** * @brief UART0 interrupt handler sub-routine * @param None * @return None **********************************************************************/ void UART0_IRQHandler(void) { // Call Standard UART 0 interrupt handler uint32_t intsrc, tmp, tmp1; /* Determine the interrupt source */ intsrc = UART_GetIntId(LPC_UART0); tmp = intsrc & UART_IIR_INTID_MASK; // Receive Line Status if (tmp == UART_IIR_INTID_RLS){ // Check line status tmp1 = UART_GetLineStatus(LPC_UART0); // Mask out the Receive Ready and Transmit Holding empty status tmp1 &= (UART_LSR_OE | UART_LSR_PE | UART_LSR_FE \ | UART_LSR_BI | UART_LSR_RXFE); // If any error exist if (tmp1) { while(tmp1){ ; //implement error handling here } } } intsrc &= (UART_IIR_ABEO_INT | UART_IIR_ABTO_INT); // Check if End of auto-baudrate interrupt or Auto baudrate time out if (intsrc){ // Clear interrupt pending if(intsrc & UART_IIR_ABEO_INT) UART_ABClearIntPending(LPC_UART0, UART_AUTOBAUD_INTSTAT_ABEO); if (intsrc & UART_IIR_ABTO_INT) UART_ABClearIntPending(LPC_UART0, UART_AUTOBAUD_INTSTAT_ABTO); if (Synchronous == RESET) { /* Interrupt caused by End of auto-baud */ if (intsrc & UART_AUTOBAUD_INTSTAT_ABEO){ // Disable AB interrupt UART_IntConfig(LPC_UART0, UART_INTCFG_ABEO, DISABLE); // Set Sync flag Synchronous = SET; } /* Auto-Baudrate Time-Out interrupt (not implemented) */ if (intsrc & UART_AUTOBAUD_INTSTAT_ABTO) { /* Just clear this bit - Add your code here */ UART_ABClearIntPending(LPC_UART0, UART_AUTOBAUD_INTSTAT_ABTO); } } } } /*-------------------------PRIVATE FUNCTIONS------------------------------*/ /*********************************************************************//** * @brief Print menu * @param[in] None * @return None **********************************************************************/ void print_menu(void) { UART_Send(LPC_UART0, menu1, sizeof(menu1), BLOCKING); UART_Send(LPC_UART0, menu2, sizeof(menu2), BLOCKING); } /*-------------------------MAIN FUNCTION------------------------------*/ /*********************************************************************//** * @brief c_entry: Main UART program body * @param[in] None * @return int **********************************************************************/ int c_entry(void) { // UART Configuration structure variable UART_CFG_Type UARTConfigStruct; // UART FIFO configuration Struct variable UART_FIFO_CFG_Type UARTFIFOConfigStruct; // Pin configuration for UART0 PINSEL_CFG_Type PinCfg; // Auto baudrate configuration structure UART_AB_CFG_Type ABConfig; uint32_t idx, len; __IO FlagStatus exitflag; uint8_t buffer[10]; /* * Initialize UART0 pin connect */ PinCfg.Funcnum = 1; PinCfg.OpenDrain = 0; PinCfg.Pinmode = 0; PinCfg.Pinnum = 2; PinCfg.Portnum = 0; PINSEL_ConfigPin(&PinCfg); PinCfg.Pinnum = 3; PINSEL_ConfigPin(&PinCfg); /* Initialize UART Configuration parameter structure to default state: * Baudrate = 9600bps * 8 data bit * 1 Stop bit * None parity */ UART_ConfigStructInit(&UARTConfigStruct); /* Initialize UART0 peripheral with given to corresponding parameter * in this case, don't care the baudrate value UART initialized * since this will be determine when running auto baudrate */ UART_Init(LPC_UART0, &UARTConfigStruct); /* Initialize FIFOConfigStruct to default state: * - FIFO_DMAMode = DISABLE * - FIFO_Level = UART_FIFO_TRGLEV0 * - FIFO_ResetRxBuf = ENABLE * - FIFO_ResetTxBuf = ENABLE * - FIFO_State = ENABLE */ UART_FIFOConfigStructInit(&UARTFIFOConfigStruct); // Initialize FIFO for UART0 peripheral UART_FIFOConfig(LPC_UART0, &UARTFIFOConfigStruct); // Enable UART Transmit UART_TxCmd(LPC_UART0, ENABLE); /* Enable UART End of Auto baudrate interrupt */ UART_IntConfig(LPC_UART0, UART_INTCFG_ABEO, ENABLE); /* Enable UART Auto baudrate timeout interrupt */ UART_IntConfig(LPC_UART0, UART_INTCFG_ABTO, ENABLE); /* preemption = 1, sub-priority = 1 */ NVIC_SetPriority(UART0_IRQn, ((0x01<<3)|0x01)); /* Enable Interrupt for UART0 channel */ NVIC_EnableIRQ(UART0_IRQn); /* ---------------------- Auto baud rate section ----------------------- */ // Reset Synchronous flag for auto-baudrate mode Synchronous = RESET; // Configure Auto baud rate mode ABConfig.ABMode = UART_AUTOBAUD_MODE0; ABConfig.AutoRestart = ENABLE; // Start auto baudrate mode UART_ABCmd(LPC_UART0, &ABConfig, ENABLE); print_menu(); /* Loop until auto baudrate mode complete */ while (Synchronous == RESET); // Print status of auto baudrate UART_Send(LPC_UART0, syncmenu, sizeof(syncmenu), BLOCKING); /* ---------------------- End of Auto baud rate section ----------------------- */ // print welcome screen print_menu(); // reset exit flag exitflag = RESET; /* Read some data from the buffer */ while (exitflag == RESET) { len = 0; while (len == 0) { len = UART_Receive(LPC_UART0, buffer, sizeof(buffer), NONE_BLOCKING); } /* Got some data */ idx = 0; while (idx < len) { if (buffer[idx] == 27) { /* ESC key, set exit flag */ UART_Send(LPC_UART0, menu3, sizeof(menu3), BLOCKING); exitflag = SET; } else if (buffer[idx] == 'r') { print_menu(); } else { /* Echo it back */ UART_Send(LPC_UART0, &buffer[idx], 1, BLOCKING); } idx++; } } // wait for current transmission complete - THR must be empty while (UART_CheckBusy(LPC_UART0) == SET); // DeInitialize UART0 peripheral UART_DeInit(LPC_UART0); /* 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