STM CircleOS forum / About UART interrupt ?

chialun · 2009-02-19 04:00:51

I use two groups of UART (UART1,UART2) .
When two groups of uart come in at the same time , Will lose one group UART of Data materials among them .

After a group UART carry out, and then go to carry out another group UART ?

Thank !!

Francis · 2009-02-19 07:46:47

UARTs are supposed to be fully independent...

chialun · 2009-02-19 10:08:49

Francis :
UARTs are supposed to be fully independent...

Into UART1 interrupt function, UART2 has data to come in too, but UART2 not into interrupt function?

so, UATR2 data loss.

===================UART1=====================
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

===================UART2=====================
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

Last edited by chialun (2009-02-19 10:11:17)

Francis · 2009-02-19 15:36:12

If you use CircleOS, you have to redirect the IRQ to your own handlers Of course, there is an interrupt for each UART:
37 44 settable USART1 USART1 global interrupt 0x0000_00D4
38 45 settable USART2 USART2 global interrupt 0x0000_00D8
39 46 settable USART3 USART3 global interrupt 0x0000_00DC
To redirect an irq, use UTIL_SetIrqHandler :
http://www.stm32circle.com/circleos_doc … 1e39ace4d3

fine · 2011-06-12 12:45:31

I've got a problem. My compiler doesn't accept USART. The error log as follows:
error: 'USART2' undeclared (first use in this function)
error: (Each undeclared identifier is reported only once
error: for each function it appears in.)

beckywen · 2013-11-07 08:46:31

Francis :
If you use CircleOS, you have to redirect the IRQ to your own handlers Of course, there is an interrupt for each UART:
37 44 settable USART1 USART1 global interrupt 0x0000_00D4
38 45 settable USART2 USART2 global interrupt 0x0000_00D8
39 46 settable USART3 USART3 global interrupt 0x0000_00DC
To redirect an irq, use UTIL_SetIrqHandler :
http://www.stm32circle.com/circleos_doc … 1e39ace4d3

what does redirect to our own handlers mean?
so this usart communication is possible done without circle os on evoprimer OPEN4 stm32f107?

thank you in advance.

# 1 2009-02-19 04:00:51 About UART interrupt ?

About UART interrupt ?

# 2 2009-02-19 07:46:47 About UART interrupt ?

Re: About UART interrupt ?

# 3 2009-02-19 10:08:49 About UART interrupt ?

Re: About UART interrupt ?

Francis :

# 4 2009-02-19 15:36:12 About UART interrupt ?

Re: About UART interrupt ?

# 5 2011-06-12 12:45:31 About UART interrupt ?

Re: About UART interrupt ?

# 6 2013-11-07 08:46:31 About UART interrupt ?

Re: About UART interrupt ?

Francis :

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