Content originally posted in LPCWare by hofmannmb on Fri Dec 04 13:29:25 MST 2015
Hello!
I was using LPC1754 UART3 without problems, until I tried to use it with more than 1 byte at FIFO reception.
So, after I set up RX FIFO Trigger Level to 4 characters UART3 TX returns data over serial line every time when it receive some amount of data over RX line.
I eliminated all functions that send data over UART3 TX line, but it still answer each time that I send something on RX line. The most interesting thing is that U3TER register is set to 0 (zero), it means that transmissions should be blocked.
Below is my configuration code.
nvic_int_disable(NVIC_UART3);
nvic_clr_pend(NVIC_UART3);
PCONP_bit.PCUART3 = 1; /* turn uart on with cpu clock */
PCLKSEL1_bit.PCLK_UART3 = 1;
U3LCR |= (1u << 7);
U3DLM = fdiv / 256;
U3DLL = fdiv & (0xFF);
U3FDR = (divadd_val + (mul_val << 4));
U3LCR &= ~(1u << 7);
U3LCR |= (3u << 0); // 8 bits
U3FCR = 7; // Enable FIFO
U3TER = 0;
nvic_clr_pend(NVIC_UART3);
nvic_int_enable(NVIC_UART3);
U3IER_bit.RDAIE = 1; // Enable Rx interrupt
U3IER_bit.RXLSIE = 1; // Enable Line Status
Can someone help with this issue?
Any ideia about this?
