Posted on January 13, 2015 at 08:22Hi,
I am trying to transfer and read data from USART1 in interrupt mode but failed to do so. I successfully communicated with the polled method. I am not able to run any interrupt.
No interrupt is executed as I write in ISR to on led but not reached to interrupt handler. that means inerrupt is not executed.
My codes are
void USART_init(unsigned int BaudRate);
void USART_Tx_Buffer(char *Str);
main()
{
DeInitClock();
DeInitGPIO();
/* Select HSI as system clock source */
&sharpifdef USE_HSI
CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSI);
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);
&sharpelse
CLK_SYSCLKSourceSwitchCmd(ENABLE);
/* Select 2MHz HSE as system clock source */
CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_HSE);
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_4);
CLK_HSICmd(DISABLE);
&sharpendif
RS232_ON();
UART_PORT_PIN_HIGH();
USART_init(9600);
enableInterrupts();
USART_Tx_Buffer(''t'');
}
void USART_init(unsigned int BaudRate)
{
USART_Cmd(USART1,ENABLE);
USART_DeInit(USART1);
CLK_PeripheralClockConfig(CLK_Peripheral_USART1, ENABLE);
USART_Init(USART1,BaudRate,USART_WordLength_8b,USART_StopBits_1,USART_Parity_No,USART_Mode_Tx|USART_Mode_Rx);
USART_ClockInit(USART1,USART_Clock_Enable,USART_CPOL_Low, USART_CPHA_1Edge,USART_LastBit_Disable);
USART_ReceiverWakeUpCmd(USART1,SET);
USART_ITConfig(USART1,USART_IT_RXNE|USART_IT_TXE,ENABLE);
}
void USART_Tx_Buffer(char *Str)
{
char Str_Length=0,i=0;
Str_Length=strlen(Str);
for(i=0;i<=Str_Length;i++)
{
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
USART_SendData8(USART1,*Str++);
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
//Rx_Data_Buffer[i] = USART_ReceiveData8(USART1);
}
}
In stm8it.c file
INTERRUPT_HANDLER(USART1_RX_IRQHandler,28)
{
/* In order to detect unexpected events during development,
it is recommended to set a breakpoint on the following instruction.
*/
//while (1);
portB_led=ON;
}
#stm8l152c6t6-usart1-interrupt-mo
