MCF5282 Uart Interrupt

JohnDoe — Tue, 02 May 2006 03:57:25 GMT

Hello. I've been programming the MCF5282 eval board these days. Now I can't get the Uart Interrupt work, edge port and timer interrupt are working by now. Is there a special way to configure the uart? Dunno what am i doing wrong. Uart code is attached below.

Thanks for your help.

// Code:

void _SCI5_uart2_init(uint32 baudRate)

{ //Initialize internal No.1 UART

//Disable receiver and transmitter

MCF5282_UART1_UCR = (MCF5282_UART_UCR_TX_DISABLED |

MCF5282_UART_UCR_RX_DISABLED);

MCF5282_GPIO_PUAPAR = 0x0F; //Set Port UA to initialize URXD0/URXD1 UTXD0/UTXD1

MCF5282_UART1_UCR = MCF5282_UART_UCR_RESET_TX; //Reset Transmitter

MCF5282_UART1_UCR = MCF5282_UART_UCR_RESET_RX; //Reset Receiver

MCF5282_UART1_UCR = MCF5282_UART_UCR_RESET_MR; //Reset Mode Register

//No parity, 8-bits per character

MCF5282_UART1_UMR = (MCF5282_UART_UMR1_PM_NONE |

MCF5282_UART_UMR1_BC_8 );

//No echo or loopback, 1 stop bit

MCF5282_UART1_UMR = (MCF5282_UART_UMR2_CM_NORMAL |

MCF5282_UART_UMR2_STOP_BITS_1);

//Set Rx and Tx baud by timer

MCF5282_UART1_UCSR = (MCF5282_UART_UCSR_RCS_SYS_CLK |

MCF5282_UART_UCSR_TCS_SYS_CLK);

MCF5282_UART1_UIMR = 0; //disable irq

//Calculate baud settings

ubgs = (uint16)((SYSTEM_CLOCK*1000000)/(baudRate * 32));

MCF5282_UART1_UBG1 = (uint8)((ubgs & 0xFF00) >> 8);

MCF5282_UART1_UBG2 = (uint8)(ubgs & 0x00FF);

//Enable receiver and transmitter

MCF5282_UART1_UCR = (MCF5282_UART_UCR_TX_ENABLED |

MCF5282_UART_UCR_RX_ENABLED);

//enable Rx irq

MCF5282_UART1_UIMR = (MCF5282_UART_UIMR_FFULL);

MCF5282_UART1_UISR = (MCF5282_UART_UISR_RXRDY);

MCF5282_INTC0_ICR14 = (uint8)(MCF5282_INTC_ICR_IL(2) | MCF5282_INTC_ICR_IP(1));

MCF5282_INTC0_IMRL &= ~(MCF5282_INTC_IMRL_INT14);

}

Re: MCF5282 Uart Interrupt

mpeters — Thu, 04 May 2006 04:39:36 GMT

Have you taken a look at our sample code? It is available on the MCF5282 product summary page, and is available for download. In the sample code, you can see how we initialized/configured the UART.

Here is the link to the MCF5282 Product Summary Page. You will want to download the .zip file called "MCF5282SC" under the "Software" section:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MCF5282&nodeId=0162468rH3YTLC00M95448

Regards,
-mp

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