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Made usart_irq example more robust. It should not duplicate bytes anymore.

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This commit is contained in:
Piotr Esden-Tempski 2011-02-17 18:32:07 -08:00
parent 7d3608f746
commit 310561ac50
1 changed files with 4 additions and 2 deletions
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6
examples/stm32/obldc/usart_irq/usart_irq.c
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@ -80,7 +80,8 @@ void usart1_isr(void)
static u8 data = 'A';
/* Check if we were called because of RXNE. */
if ((USART_SR(USART1) & USART_SR_RXNE) != 0) {
if (((USART_CR1(USART1) & USART_SR_RXNEIE) != 0) &&
((USART_SR(USART1) & USART_SR_RXNE) != 0)) {
/* Indicate that we got data. */
gpio_toggle(GPIOA, GPIO6);
@ -92,7 +93,8 @@ void usart1_isr(void)
}
/* Check if we were called because of TXE. */
if ((USART_SR(USART1) & USART_SR_TXE) != 0) {
if ((USART_CR1(USART1) & USART_SR_TXEIE) != 0) &&
((USART_SR(USART1) & USART_SR_TXE) != 0)) {
/* Indicate that we are sending out data. */
gpio_toggle(GPIOA, GPIO7);