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37 lines
858 B
C
37 lines
858 B
C
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#define USE_STDPERIPH_DRIVER
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#include "stm32_p103.h"
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void USART2_IRQHandler(void)
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{
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/* Make sure the interrupt was triggered by a transmit. This should
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* always be true.
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*/
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if(USART_GetITStatus(USART2, USART_IT_TXE) != RESET) {
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/* Toggle the LED just to show that progress is being made. */
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GPIOC->ODR = GPIOC->ODR ^ 0x00001000;
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/* Send the next byte */
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USART_SendData(USART2, 'X');
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}
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}
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int main(void)
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{
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init_led();
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init_button();
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init_rs232();
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enable_rs232_interrupts();
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enable_rs232();
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/* Send the first byte and enable the interrupt. */
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USART_SendData(USART2, 'x');
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USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
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/* Infinite loop - when the previous finishes, the interrupt will trigger.
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* The interrupt will send the next byte.
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*/
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while(1);
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}
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