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fixed bug with uart DMA

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This commit is contained in:
joxe 2011-01-19 20:44:20 +00:00
parent 6864494646
commit 801a7e1149
1 changed files with 11 additions and 8 deletions
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19
cpu/msp430/dev/uart1.c
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE. * SUCH DAMAGE.
* *
* @(#)$Id: uart1.c,v 1.23 2011/01/18 16:07:16 adamdunkels Exp $ * @(#)$Id: uart1.c,v 1.24 2011/01/19 20:44:20 joxe Exp $
*/ */
/* /*
@ -77,23 +77,24 @@ static uint8_t txbuf_data[TXBUFSIZE];
#define RXBUFSIZE 128 #define RXBUFSIZE 128
static uint8_t rxbuf[RXBUFSIZE]; static uint8_t rxbuf[RXBUFSIZE];
static uint8_t last_size; static uint16_t last_size;
static struct ctimer rxdma_timer; static struct ctimer rxdma_timer;
static void static void
handle_rxdma_timer(void *ptr) handle_rxdma_timer(void *ptr)
{ {
uint8_t size; uint16_t size;
size = DMA0SZ; /* Note: loop requires that size is less or eq to RXBUFSIZE */ size = DMA0SZ; /* Note: loop requires that size is less or eq to RXBUFSIZE */
for(;last_size != size; last_size--) { while(last_size != size) {
if(last_size == 0) last_size = RXBUFSIZE; /* printf("read: %c [%d,%d]\n", (unsigned char)rxbuf[RXBUFSIZE - last_size], */
/* printf("read: %c\n", (unsigned char)rxbuf[RXBUFSIZE - last_size]); */ /* last_size, size); */
uart1_input_handler((unsigned char)rxbuf[RXBUFSIZE - last_size]); uart1_input_handler((unsigned char)rxbuf[RXBUFSIZE - last_size]);
last_size--;
if(last_size == 0) last_size = RXBUFSIZE;
} }
ctimer_reset(&rxdma_timer); ctimer_reset(&rxdma_timer);
} }
#endif /* RX_WITH_DMA */ #endif /* RX_WITH_DMA */
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
@ -107,7 +108,7 @@ void
uart1_set_input(int (*input)(unsigned char c)) uart1_set_input(int (*input)(unsigned char c))
{ {
#if RX_WITH_DMA /* This needs to be called after ctimer process is started */ #if RX_WITH_DMA /* This needs to be called after ctimer process is started */
ctimer_set(&rxdma_timer, CLOCK_SECOND/32, handle_rxdma_timer, NULL); ctimer_set(&rxdma_timer, CLOCK_SECOND/64, handle_rxdma_timer, NULL);
#endif #endif
uart1_input_handler = input; uart1_input_handler = input;
} }
@ -246,6 +247,7 @@ uart1_init(unsigned long ubr)
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
#if !RX_WITH_DMA
interrupt(UART1RX_VECTOR) interrupt(UART1RX_VECTOR)
uart1_rx_interrupt(void) uart1_rx_interrupt(void)
{ {
@ -275,6 +277,7 @@ uart1_rx_interrupt(void)
ENERGEST_OFF(ENERGEST_TYPE_IRQ); ENERGEST_OFF(ENERGEST_TYPE_IRQ);
} }
#endif /* !RX_WITH_DMA */
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
#if TX_WITH_INTERRUPT #if TX_WITH_INTERRUPT
interrupt(UART1TX_VECTOR) interrupt(UART1TX_VECTOR)