added initial uart1 DMA rx support and required LPM requirements api
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joxe
parent
65048c519c
commit
565fda47aa
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@ -26,7 +26,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)$Id: uart1.c,v 1.19 2010/06/15 13:30:42 nifi Exp $
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* @(#)$Id: uart1.c,v 1.20 2011/01/05 12:02:02 joxe Exp $
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*/
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/*
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@ -37,13 +37,16 @@
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#include <io.h>
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#include <signal.h>
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#include <stdio.h>
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#include "sys/energest.h"
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#include "dev/uart1.h"
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#include "dev/watchdog.h"
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#include "sys/ctimer.h"
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#include "lib/ringbuf.h"
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static int (*uart1_input_handler)(unsigned char c);
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/* should be static */
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int (*uart1_input_handler)(unsigned char c);
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static uint8_t rx_in_progress;
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static volatile uint8_t transmitting;
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@ -54,6 +57,12 @@ static volatile uint8_t transmitting;
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#define TX_WITH_INTERRUPT 1
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#endif /* UART1_CONF_TX_WITH_INTERRUPT */
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#ifdef UART1_CONF_RX_WITH_DMA
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#define TX_WITH_INTERRUPT UART1_CONF_RX_WITH_DMA
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#else /* UART1_CONF_RX_WITH_DMA */
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#define RX_WITH_DMA 0
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#endif /* UART1_CONF_RX_WITH_DMA */
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#if TX_WITH_INTERRUPT
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#define TXBUFSIZE 64
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@ -61,6 +70,29 @@ static struct ringbuf txbuf;
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static uint8_t txbuf_data[TXBUFSIZE];
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#endif /* TX_WITH_INTERRUPT */
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#if RX_WITH_DMA
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#define RXBUFSIZE 64
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static uint8_t rxbuf[RXBUFSIZE];
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static uint8_t last_size;
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static struct ctimer rxdma_timer;
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static void
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handle_rxdma_timer(void *ptr)
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{
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uint8_t size;
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size = DMA0SZ; /* Note: loop requires that size is less or eq to RXBUFSIZE */
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for (;last_size != size; last_size--) {
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if(last_size == 0) last_size = RXBUFSIZE;
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/* printf("read: %c\n", (unsigned char)rxbuf[RXBUFSIZE - last_size]); */
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uart1_input_handler((unsigned char)rxbuf[RXBUFSIZE - last_size]);
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}
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ctimer_reset(&rxdma_timer);
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}
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#endif /* RX_WITH_DMA */
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/*---------------------------------------------------------------------------*/
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uint8_t
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uart1_active(void)
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@ -71,6 +103,9 @@ uart1_active(void)
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void
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uart1_set_input(int (*input)(unsigned char c))
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{
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#if RX_WITH_DMA /* This needs to be called after ctimer process is started */
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ctimer_set(&rxdma_timer, CLOCK_SECOND/32, handle_rxdma_timer, NULL);
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#endif
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uart1_input_handler = input;
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}
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/*---------------------------------------------------------------------------*/
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@ -188,7 +223,25 @@ uart1_init(unsigned long ubr)
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ringbuf_init(&txbuf, txbuf_data, sizeof(txbuf_data));
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IE2 |= UTXIE1; /* Enable USART1 TX interrupt */
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#endif /* TX_WITH_INTERRUPT */
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#if RX_WITH_DMA
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IE2 &= ~URXIE1; /* disable USART1 RX interrupt */
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/* UART1_RX trigger */
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DMACTL0 = DMA0TSEL_9;
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/* source address = RXBUF1 */
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DMA0SA = (unsigned int) &RXBUF1;
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DMA0DA = (unsigned int) &rxbuf;
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DMA0SZ = RXBUFSIZE;
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last_size = RXBUFSIZE;
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DMA0CTL = DMADT_4 + DMASBDB + DMADSTINCR_3 + DMAEN + DMAREQ;// DMAIE;
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msp430_add_lpm_req(MSP430_REQUIRE_LPM1);
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#endif /* RX_WITH_DMA */
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}
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/*---------------------------------------------------------------------------*/
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interrupt(UART1RX_VECTOR)
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uart1_rx_interrupt(void)
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: msp430.c,v 1.13 2010/03/21 10:40:15 nifi Exp $
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* @(#)$Id: msp430.c,v 1.14 2011/01/05 12:02:01 joxe Exp $
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*/
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#include <io.h>
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#include <signal.h>
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@ -38,6 +38,10 @@
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#include "dev/watchdog.h"
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#include "net/uip.h"
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/* dco_required set to 1 will cause the CPU not to go into
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sleep modes where the DCO clock stopped */
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int msp430_dco_required;
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/*---------------------------------------------------------------------------*/
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#if defined(__MSP430__) && defined(__GNUC__) && MSP430_MEMCPY_WORKAROUND
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void *
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@ -126,7 +130,6 @@ static void
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init_ports(void)
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{
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/* Turn everything off, device drivers enable what is needed. */
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/* All configured for digital I/O */
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#ifdef P1SEL
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P1SEL = 0;
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@ -183,6 +186,28 @@ init_ports(void)
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extern int _end; /* Not in sys/unistd.h */
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static char *cur_break = (char *)&_end;
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/*---------------------------------------------------------------------------*/
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/* add/remove_lpm_req - for requiring a specific LPM mode. currently Contiki */
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/* jumps to LPM3 to save power, but DMA will not work if DCO is not clocked */
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/* so some modules might need to enter their LPM requirements */
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/* NOTE: currently only works with LPM1 (e.g. DCO) requirements. */
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/*---------------------------------------------------------------------------*/
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void
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msp430_add_lpm_req(int req)
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{
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if (req <= MSP430_REQUIRE_LPM1) {
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msp430_dco_required++;
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}
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}
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void
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msp430_remove_lpm_req(int req)
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{
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if (req <= MSP430_REQUIRE_LPM1) {
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msp430_dco_required--;
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}
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}
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void
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msp430_cpu_init(void)
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{
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@ -194,6 +219,7 @@ msp430_cpu_init(void)
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if((uintptr_t)cur_break & 1) { /* Workaround for msp430-ld bug! */
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cur_break++;
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}
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msp430_dco_required = 0;
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}
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/*---------------------------------------------------------------------------*/
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#define asmv(arg) __asm__ __volatile__(arg)
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: msp430.h,v 1.2 2008/02/03 20:58:11 adamdunkels Exp $
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* $Id: msp430.h,v 1.3 2011/01/05 12:02:01 joxe Exp $
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*/
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/**
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@ -49,4 +49,12 @@
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#define MSP430_CPU_SPEED 2457600UL
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#endif
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#define MSP430_REQUIRE_CPUON 0
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#define MSP430_REQUIRE_LPM1 1
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#define MSP430_REQUIRE_LPM2 2
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#define MSP430_REQUIRE_LPM3 3
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void msp430_add_lpm_req();
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void msp430_remove_lpm_req();
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#endif /* __MSP430_H__ */
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