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hantek-dso: proper protocol implementation of trigger/samplerate setting

This commit is contained in:
Bert Vermeulen 2012-05-14 02:33:37 +02:00
parent 6e71ef3b6f
commit bc79e906a0
2 changed files with 48 additions and 36 deletions
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74
hardware/hantek-dso/dso.c
View File

@ -221,8 +221,6 @@ SR_PRIV int dso_set_trigger_samplerate(struct context *ctx)
{
int ret, tmp;
uint8_t cmdstring[12];
uint8_t timebasefast_small[] = {1, 2, 3, 4};
uint8_t timebasefast_large[] = {0, 0, 2, 3};
uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
@ -235,33 +233,53 @@ SR_PRIV int dso_set_trigger_samplerate(struct context *ctx)
cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
/* Trigger source */
cmdstring[2] = (ctx->triggersource & 0x03) << 6;
cmdstring[2] = (ctx->triggersource & 0x03);
/* Frame size */
cmdstring[2] |= (ctx->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 3;
cmdstring[2] |= (ctx->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
/* Timebase fast (no idea what this means) */
if (ctx->timebase < TIME_20us)
tmp = 0;
else if (ctx->timebase > TIME_200us)
tmp = 4;
else {
if (ctx->framesize == FRAMESIZE_SMALL)
tmp = timebasefast_small[ctx->timebase - 1];
else
tmp = timebasefast_large[ctx->timebase - 1];
/* Timebase fast */
switch (ctx->framesize) {
case FRAMESIZE_SMALL:
if (ctx->timebase < TIME_20us)
tmp = 0;
else if (ctx->timebase == TIME_20us)
tmp = 1;
else if (ctx->timebase == TIME_40us)
tmp = 2;
else if (ctx->timebase == TIME_100us)
tmp = 3;
else if (ctx->timebase >= TIME_200us)
tmp = 4;
break;
case FRAMESIZE_LARGE:
if (ctx->timebase < TIME_40us) {
sr_err("hantek-dso: timebase < 40us only supported with 10K buffer");
return SR_ERR_ARG;
}
else if (ctx->timebase == TIME_40us)
tmp = 0;
else if (ctx->timebase == TIME_100us)
tmp = 2;
else if (ctx->timebase == TIME_200us)
tmp = 3;
else if (ctx->timebase >= TIME_400us)
tmp = 4;
break;
}
cmdstring[2] |= tmp & 0x07;
cmdstring[2] = 0x45;
/* Enabled channels */
cmdstring[2] |= (tmp & 0x07) << 5;
/* Enabled channels: 00=CH1 01=CH2 10=both */
tmp = (((ctx->ch2_enabled ? 1 : 0) << 1) + (ctx->ch1_enabled ? 1 : 0)) - 1;
cmdstring[3] = tmp;
/* TODO: Fast rates channel */
cmdstring[3] |= 0 << 5;
/* Fast rates channel */
/* TODO: is this right? */
tmp = ctx->timebase < TIME_10us ? 1 : 0;
cmdstring[3] |= tmp << 2;
/* Trigger slope */
cmdstring[3] |= (ctx->triggerslope ? 1 : 0) << 4;
/* Trigger slope: 0=positive 1=negative */
cmdstring[3] |= (ctx->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
/* Timebase */
if (ctx->timebase < TIME_100us)
@ -274,15 +292,13 @@ cmdstring[2] = 0x45;
else
tmp = timebase_large[ctx->timebase - 3];
}
tmp = 0xebff;
cmdstring[4] = tmp & 0xff;
cmdstring[5] = (tmp >> 8) & 0xff;
/* Horizontal trigger position */
tmp = 0x77fff + 0x8000 * ctx->triggerposition;
cmdstring[6] = tmp & 0xff;
cmdstring[7] = (tmp >> 8) & 0xff;
/* Trigger position (time) */
tmp = 0x77660 + ctx->triggerposition;
tmp = 0x7006f;
cmdstring[8] = tmp & 0xff;
cmdstring[9] = (tmp >> 8) & 0xff;
cmdstring[10] = (tmp >> 16) & 0xff;
if (send_begin(ctx) != SR_OK)
@ -388,7 +404,7 @@ relays[0] = 0x01;
if (ctx->coupling_ch2 != COUPLING_AC)
relays[6] = ~relays[6];
if (ctx->triggersource == TRIGGER_EXT || ctx->triggersource == TRIGGER_EXT10)
if (ctx->triggersource == TRIGGER_EXT)
relays[7] = ~relays[7];
if ((ret = libusb_control_transfer(ctx->usb->devhdl,

10
hardware/hantek-dso/dso.h
View File

@ -34,12 +34,10 @@
#define DEFAULT_VOLTAGE VOLTAGE_2V
#define DEFAULT_FRAMESIZE FRAMESIZE_SMALL
#define DEFAULT_TIMEBASE TIME_1ms
#define DEFAULT_TIMEBASE TIME_400us
#define DEFAULT_TRIGGER_SOURCE TRIGGER_CH1
#define DEFAULT_COUPLING COUPLING_AC
/* Halfway between min and max = 0V */
#define DEFAULT_HORIZ_TRIGGERPOS 0x1400
#define DEFAULT_HORIZ_TRIGGERPOS 0.5
#define DEFAULT_VERT_OFFSET 0.5
#define DEFAULT_VERT_TRIGGERPOS 0.0
@ -117,9 +115,7 @@ enum trigger_slopes {
enum trigger_sources {
TRIGGER_CH2 = 0,
TRIGGER_CH1,
TRIGGER_ALT,
TRIGGER_EXT,
TRIGGER_EXT10
};
enum capturestates {
@ -193,7 +189,7 @@ struct context {
gboolean filter_trigger;
int triggerslope;
int triggersource;
int triggerposition;
float triggerposition;
int triggermode;
};