Hi all,
We are developing on Keil uVision v4.74 for LPC2478 controller and using Keil ULinkPro for debugging.
We are using UART1 interface without Modem capabilities. Follwing is our initialization code:
//configure pin selections for UART1 // configure UART // enable power to UART PCONP |= (1<<MODBUS_OPTION2_POWER_BIT); // RX and TX interrupts U1IER = 0x3; // DLAB = 1 U1LCR = 0x83; U1FCR = 0x87; //Issue:actual value set is 0xC1 //Set Parity bit, Stop bit and baud rate according to application U1LCR &= 0x7F ; // DLAB = 0
The issue we are facing with the UART1 Fifo Control Register U1FCR is not setting the value correctly. U1FCR has following structure:
Bit 0 - FIFO Enable Bit 1 - Rx FIFO Reset Bit 2 - Tx FIFO Reset Bit 5:3 - Reserved Bit 7:6 - Rx Trigger Level 00 - Trigger level 0 (1 character or 0x01) 01 - Trigger level 1 (4 characters or 0x04) 10 - Trigger level 2 (8 characters or 0x08) 11 - Trigger level 3 (14 characters or 0x0E)
Everytime we set value 0x87(Trigger Level 2, Rx-Tx Fifo Reset, FIFO Enable), it is setting as 0xC1(Trigger Level 3,FIFO Enable)
Help needed seriously.