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dma transfer support.

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This commit is contained in:
nvt-se 2007-06-28 14:41:17 +00:00
parent ff04b5e153
commit 268766e890
2 changed files with 31 additions and 49 deletions
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26
platform/msb430/dev/dma.c
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@ -67,3 +67,29 @@ interrupt(DACDMA_VECTOR) irq_dacdma(void)
DAC12_1CTL &= ~(DAC12IFG | DAC12IE);
}
}
void
dma_transfer(char *buf, unsigned len)
{
// Configure DMA Channel 0 for UART0 TXIFG.
DMACTL0 = DMA0TSEL_4;
// No DMAONFETCH, ROUNDROBIN, ENNMI.
DMACTL1 = 0x0000;
/*
* Single transfer mode, dstadr unchanged, srcadr
* incremented, byte access
* Important to use DMALEVEL when using USART TX
* interrupts so first edge
* doesn't get lost (hangs every 50. - 100. time)!
*/
DMA0CTL =
DMADT_0 | DMADSTINCR_0 | DMASRCINCR_3 | DMASBDB | DMALEVEL | DMAIE;
DMA0SA = (unsigned) buf;
DMA0DA = (unsigned) &TXBUF0;
DMA0SZ = len;
DMA0CTL |= DMAEN; // enable DMA
U0CTL &= ~SWRST; // enable UART, starts transfer
}

54
platform/msb430/dev/dma.h
View file

@ -28,56 +28,12 @@
*
* This file is part of the Contiki operating system.
*
* $Id: dma.h,v 1.2 2007/06/28 14:41:17 nvt-se Exp $
*/
/**
* \file
* ADC functions.
* \author
* Nicolas Tsiftes <nvt@sics.se>
*/
#ifndef DMA_H
#define DMA_H
#include <io.h>
#include <signal.h>
void dma_transfer(char *, unsigned);
#include "contiki-msb430.h"
void
adc_init(void) {
//Setup ADC12, ref., sampling time, REFON for DAC!!
ADC12CTL0 = SHT0_15 + SHT1_15 + MSC;
// Use sampling timer, repeat-sequence-of-channels
ADC12CTL1 = SHP + CONSEQ_3 + CSTARTADD_0;
ADC12MCTL0 = INCH_0 + SREF_0; // P60: AIN0
ADC12MCTL1 = INCH_0 + SREF_0; // P60: AIN0
ADC12MCTL2 = INCH_0 + SREF_0; // P60: AIN0
ADC12MCTL3 = INCH_1 + SREF_0; // P61: AIN1
ADC12MCTL4 = INCH_1 + SREF_0; // P61: AIN1
ADC12MCTL5 = INCH_1 + SREF_0; // P61: AIN1
ADC12MCTL6 = INCH_2 + SREF_0; // P62: AIN2
ADC12MCTL7 = INCH_2 + SREF_0; // P62: AIN2
ADC12MCTL8 = INCH_2 + SREF_0; // P62: AIN2
ADC12MCTL9 = INCH_2 + SREF_0; // P62: AIN2
ADC12MCTL10 = INCH_3 + SREF_0; // P63: AIN2
ADC12MCTL11 = INCH_4 + SREF_0; // P64: AIN3
ADC12MCTL12 = INCH_5 + SREF_0; // P65: AIN4
ADC12MCTL13 = INCH_10 + SREF_0 + EOS; // Temp diode
}
void
adc_on(void)
{
ADC12CTL0 |= ADC12ON;
clock_delay(600);
ADC12CTL0 |= ENC;
ADC12CTL0 |= ADC12SC;
}
void
adc_off(void)
{
ADC12CTL0 &= ~ENC;
clock_delay(600);
ADC12CTL0 &= ~ADC12ON;
}
#endif