Posted on May 17, 2011 at 09:48Hi,
My application use UART0 and a Timer (time base of 1ms) with the STR9. When I disable timer interrupt, everything is fine with the UART. When I enable the Timer, some packet are OK and randomly, it stops working. Something it looks like I receive the last TX that I've done.
I tried to use instead of the TIM0 (that has a bigger interrupt level than the UART) to use Periodical RTC (that has a lower interrupt level than the UART), but without success.
My UART settings are:
SCU_APBPeriphClockConfig(__UART0, ENABLE)
SCU_APBPeriphReset(__UART0,DISBLE)
UART_InitStructure.UART_WordLength = UART_WordLength_8D;
UART_InitStructure.UART_StopBits = UART_StopBits_1;
UART_InitStructure.UART_Parity = UART_Parity_No ;
UART_InitStructure.UART_BaudRate = 9600;
UART_InitStructure.UART_HardwareFlowControl =
UART_HardwareFlowControl_None;
UART_InitStructure.UART_Mode = UART_Mode_Tx_Rx;
UART_InitStructure.UART_FIFO = UART_FIFO_Disable;
UART_DeInit(UART0)
UART_ITConfig(UART0,UART_IT_Transmit,DISABLE)
UART_ITConfig(UART0, UART_IT_Receive,ENABLE)
VIC_Config(UART0_ITLine, VIC_IRQ,5)
VIC_ITCmd(UART0_ITLine,ENABLE)
UART_Init(UART0,&UART_InitStructure)
UART_Cmd(UART0,ENABLE);
My TIM0 Settings are :
SCU_APBPeriphClockConfig(__TIM01, ENABLE)
SCU_APBPeriphReset(__TIM01,DISBLE)
TIM_DeInit(TIM0)
VIC_Config(TIM0_ITLine, VIC_IRQ, 6)
VIC_ITCmd(TIM0_ITLine, ENABLE)
freq = SCU_GetPCLKFreqValue()
Tmr0_Cmp_Value = freq / TMR0_PRESCALER)
TIM0->OC1R = Tmr0_Cmp_Value
TIM_PrescalerConfig(TIM0, (TMR0_PRESCALER – 1))
TIM_CounterCmd(TIM0,TIM_START)
TIM_ITConfig(TIM0, TIM_IT_OC1, ENABLE)
My Alternative config of the RTC is:
SCU_APBPeriphClockConfig(__RTC, ENABLE)
SCU_APBPeriphReset(__RTC,DISBLE)
RTC_DeInit()
RTC_PeriodicIntConfig(RTC_Per_1024Hz);
VIC_Config(RTC_ITLine, VIC_IRQ, 6)
VIC_ITCmd(RTC_ITLine, ENABLE)
RTC_ITConfig(RTC_IT_Per, ENABLE)
