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Altera_Forum's avatar
Altera_Forum
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12 years ago

Adding a vectored interrupt controller has caused the UART module to stop responding

First, I have a system that is made up of a Nios II/e CPU, JTAG debugger UART, interval timer (sys_clk_timer) and a separate UART module that is used for RS232 serial communication, ect. The system w...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

after two days of debugging...I have solved the problem by using a function usleep(delay_us_number); before writing to the transmit data register and changing from direct register access in firmware to instead use HAL library functions like IOWR_ALTERA_AVALON_UART_TXDATA(UART_BASE,myChar); etc...