LPC18xx/43xx UART example

Detailed Description

Example description
The UART example shows how to use the UART in polling, interrupt, and DMA modes.

To use the example, connect a serial cable to the board's RS232/UART port and start a terminal program to monitor the port. The terminal program on the host PC should be setup for Baudrate-8-N-1 (Baudrate is optional).
After a reset condition, press 'a' or 'A' to start Auto-baudrate mode. Once Auto baud rate mode completed, welcome menu is printed on terminal. Change modes by selecting the option from the terminal.

Special connection requirements
There are no special connection requirements for this example.

Build procedures:
LPC18xx/43xx example quickstart for Keil uVision4
LPC18xx/43xx example quickstart for IAR EWARM
LPC18xx/43xx example quickstart for Code Red Xpresso

Supported boards and board setup:
Hitex 1850 evaluation boards
Hitex 4350 evaluation boards
Keil 1857 evaluation boards
Keil 4357 evaluation boards

Submitting LPCOpen issues:
Community support for LPCOpen

Macros
#define	LPC_UART   LPC_USART0
#define	UARTx_IRQn   USART0_IRQn
#define	UARTx_IRQHandler   UART0_IRQHandler
#define	DMA_TIMEOUT   0xA000000

Functions
void	App_DMA_Init (void)
void	App_DMA_DeInit (void)
void	App_DMA_Test (void)
void	Print_Menu_Interrupt (LPC_USART_T *UARTx)
void	App_Interrupt_Init (void)
void	App_Interrupt_DeInit (void)
void	App_Interrupt_Test (void)
void	Print_Menu_Polling (void)
void	DMA_IRQHandler (void)
	GPDMA interrupt handler sub-routine.
void	UARTx_IRQHandler (void)
	UART interrupt handler sub-routine.
int	main (void)
	Main UART program body.

Variables
static uint8_t	uartABComplete [] = "UART Auto-Baudrate synchronized! \r\n"
static uint8_t	uartPolling_menu1 [] = "Hello NXP Semiconductors \r\n"
static uint8_t	uartPolling_menu2 [] = "UART polling mode demo \r\n"
static uint8_t	uartPolling_menu3 [] = "\r\nUART demo terminated!"
static uint8_t	uartPolling_menu4 []
static uint8_t	uartPolling_menu5 [] = "\r\nPolling mode is running now! Please press \'c\' and choose another mode \r\n"
static uint8_t	uart_interrupt_menu []
static uint8_t	uart_interrupt_menu1 [] = "UART interrupt menu 1 \r\n"
static uint8_t	uart_interrupt_menu2 [] = "UART interrupt menu 2 \r\n"
static uint8_t	uart_interrupt_menu3 [] = "UART interrupt menu 3 \r\n"
static uint8_t	uart_interrupt_menu4 [] = "UART interrupt menu 4 \r\n"
static uint8_t	dmaChannelNumTx
static uint8_t	dmaChannelNumRx
static uint8_t	uartDMA_menu []
static volatile uint32_t	channelTC
static volatile uint32_t	channelTCErr
static FunctionalState	isDMATx = ENABLE

Macro Definition Documentation

#define DMA_TIMEOUT   0xA000000

Definition at line 131 of file uart.c.

#define LPC_UART   LPC_USART0

Definition at line 85 of file uart.c.

#define UARTx_IRQHandler   UART0_IRQHandler

Definition at line 87 of file uart.c.

#define UARTx_IRQn   USART0_IRQn

Definition at line 86 of file uart.c.

Function Documentation

void App_DMA_DeInit

(

void

)

Definition at line 162 of file uart.c.

void App_DMA_Init

(

void

)

Definition at line 151 of file uart.c.

void App_DMA_Test

(

void

)

Definition at line 170 of file uart.c.

void App_Interrupt_DeInit

(

void

)

Definition at line 245 of file uart.c.

void App_Interrupt_Init

(

void

)

Definition at line 225 of file uart.c.

void App_Interrupt_Test

(

void

)

Definition at line 256 of file uart.c.

void DMA_IRQHandler

(

void

)

GPDMA interrupt handler sub-routine.

Returns

Nothing

Definition at line 305 of file uart.c.

int main

(

void

)

Main UART program body.

Main program body.

Returns

Always returns -1

Definition at line 335 of file uart.c.

void Print_Menu_Interrupt

(

LPC_USART_T *

UARTx

)

Definition at line 209 of file uart.c.

void Print_Menu_Polling

(

void

)

Definition at line 290 of file uart.c.

void UARTx_IRQHandler

(

void

)

UART interrupt handler sub-routine.

Returns

Nothing

Definition at line 326 of file uart.c.

Variable Documentation

volatile uint32_t channelTC

static

Definition at line 138 of file uart.c.

volatile uint32_t channelTCErr

static

Definition at line 139 of file uart.c.

uint8_t dmaChannelNumRx

static

Definition at line 134 of file uart.c.

uint8_t dmaChannelNumTx

static

Definition at line 134 of file uart.c.

FunctionalState isDMATx = ENABLE

static

Definition at line 140 of file uart.c.

uint8_t uart_interrupt_menu[]

static

Initial value:

=
 "UART Interrupt mode demo ! \r\nPress '1' to '4' to display 4 menus \r\nPress 'x'to exit UART interrupt mode \r\n"

Definition at line 123 of file uart.c.

uint8_t uart_interrupt_menu1[] = "UART interrupt menu 1 \r\n"

static

Definition at line 125 of file uart.c.

uint8_t uart_interrupt_menu2[] = "UART interrupt menu 2 \r\n"

static

Definition at line 126 of file uart.c.

uint8_t uart_interrupt_menu3[] = "UART interrupt menu 3 \r\n"

static

Definition at line 127 of file uart.c.

uint8_t uart_interrupt_menu4[] = "UART interrupt menu 4 \r\n"

static

Definition at line 128 of file uart.c.

uint8_t uartABComplete[] = "UART Auto-Baudrate synchronized! \r\n"

static

Definition at line 110 of file uart.c.

uint8_t uartDMA_menu[]

static

Initial value:

= "Hello NXP Semiconductors (DMA mode)\r\n"
        "UART DMA mode demo ! Please type 'hello NXP' to return\r\n"

Definition at line 135 of file uart.c.

uint8_t uartPolling_menu1[] = "Hello NXP Semiconductors \r\n"

static

Definition at line 113 of file uart.c.

uint8_t uartPolling_menu2[] = "UART polling mode demo \r\n"

static

Definition at line 114 of file uart.c.

uint8_t uartPolling_menu3[] = "\r\nUART demo terminated!"

static

Definition at line 115 of file uart.c.

uint8_t uartPolling_menu4[]

static

Initial value:

= "\r\nPress number 1-3 to choose UART running mode:\r\n"
          "\t 1: Polling Mode \r\n"
          "\t 2: Interrupt Mode \r\n"
          "\t 3: DMA Mode \r\n"

Definition at line 116 of file uart.c.

uint8_t uartPolling_menu5[] = "\r\nPolling mode is running now! Please press \'c\' and choose another mode \r\n"

static

Definition at line 120 of file uart.c.