topic Re: mcf5282 uart help in ColdFire/68K Microcontrollers and Processors

mcf5282 uart help

illinavillim — Thu, 29 Oct 2020 08:46:20 GMT

Hello!

Im using mcf5282 in mcf5282evb.In my application I need to receive, via UART, text files
and process them in 16 bytes groups, so I need to implement some kind of flow
control in the receiver part.

I think Hardware flow control is the one that best fits my needs.

I need some help with the configuration. This is my init archive:

Code:

void mcf5282_uart1_init(void){            MCF5282_GPIO_PUAPAR |= 0x0C;        /*         * Reset TX and RX         */        MCF5282_UART1_UCR = MCF5282_UART_UCR_RESET_TX;        MCF5282_UART1_UCR = MCF5282_UART_UCR_RESET_RX;        /*      * Reset Mode Register      */        MCF5282_UART1_UCR = MCF5282_UART_UCR_RESET_MR;            /*         * No parity, 8-bits,         */        MCF5282_UART1_UMR = (0                | MCF5282_UART_UMR1_RXRTS                //Receiver Request To Send                |  MCF5282_UART_UMR1_PM_NONE                | MCF5282_UART_UMR1_BC_8 );        /*         *  1 stop bit, MCF5282_UART1_UMR2 = 0x07;      */        MCF5282_UART1_UMR = (0                | MCF5282_UART_UMR2_CM_NORMAL                | MCF5282_UART_UMR2_STOP_BITS_1);        /*         * Set Rx and Tx baud by timer, MCF5282_UART1_UCSR = 0xDD;      */        MCF5282_UART1_UCSR = (0                | MCF5282_UART_UCSR_RCS_SYS_CLK                | MCF5282_UART_UCSR_TCS_SYS_CLK);                /*        * No interrupts        */        MCF5282_UART1_UIMR = 0x00; //        /*         * Calculate baud settings      */        MCF5282_UART1_UBG1 = 0;        MCF5282_UART1_UBG2 = 208; //        /*      * Enable receiver and tx      */        MCF5282_UART1_UCR = (0                | MCF5282_UART_UCR_TX_ENABLED                | MCF5282_UART_UCR_RX_ENABLED                );}

Is there something i am doing wrong? maybe the jumper or the GPIO port settings?

Please help!

Thank you

Alban: "SRC" code format

Message Edited by Alban on 2007-02-13 03:59 PM

Re: mcf5282 uart help

mccPaul — Fri, 16 Feb 2007 01:51:52 GMT

You don't say what the problem is that you are having, perhaps you could add that?

It may also be useful to see the code that you are using to poll the UART and to know something about the device that is transmitting to the UART (presumably it is configured to used HW flow control as well?)

Paul.

Re: mcf5282 uart help

illinavillim — Fri, 16 Feb 2007 17:39:52 GMT

My problem is that the hardware control is not working properly.
I am transmitting to the hyperteminal which is configured for hardware flow control. I need
the hyperteminal to stop sending characters while I am processing data, and start sending again afterwards.

My question is, ¿how should the GPIO be configured? And what about the jumpers in the board?

Thanks in advance for your help