Hi,
I have been learning how to use CMSIS v5 Beta to program an LPC4357, and so far so good.
I got stuck in creating an interrupt for USART3 (Rx). I am using numerous other interrupts with no problem. I receive the following error when compiling:
Error: L6200E: Symbol USART3_IRQHandler multiply defined (by usart_lpc43xx.o and main.o).
I am using the CMSIS Startup, system, DRIVER_USART, USART_LPC43xx files, and i receive the above error.
When debugging, and triggering an interrupt, it seems to go to the Hardfault handler??.
When examining the above files, there seems to be another "MX_USART3_IRQHandler".
Could some one please help me out on this? Or/and provide me with a very basic program example for USARTn Interrupts using CMSIS v4.5.0 / v5.
I have realized that there are hardly any CMSIS examples around, especially UART. Though of course i might be wrong.
void USART3_IRQHandler()
{
NVIC_DisableIRQ(USART3_IRQn);
NVIC_ClearPendingIRQ(USART3_IRQn);
Driver_USART3.Send("\nC\n", 5);
while (Driver_USART3.GetStatus().tx_busy);
NVIC_EnableIRQ(USART3_IRQn);
}
void UART_Interrupt_Init()
LPC_USART3->IER = 0x03;
UART3 without interrupts enabled functions well. I only placed above code for simplicity.
I know you are the experts on CMSIS, so I really need your help.
I am grateful for any help given.
The CMSIS UART driver implements already an USART interrupt, so you must remove this code from main.c
void USART3_IRQHandler() {
An usage example can be found in the documentation, for example here:
http://arm-software.github.io/CMSIS_5/Driver/html/group__usart__interface__gr.html