diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/cb_pcidas.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/cb_pcidas.c | 62 |
1 files changed, 57 insertions, 5 deletions
diff --git a/drivers/staging/comedi/drivers/cb_pcidas.c b/drivers/staging/comedi/drivers/cb_pcidas.c index 3275fc5..0941643 100644 --- a/drivers/staging/comedi/drivers/cb_pcidas.c +++ b/drivers/staging/comedi/drivers/cb_pcidas.c @@ -53,6 +53,15 @@ Configuration options: For commands, the scanned channels must be consecutive (i.e. 4-5-6-7, 2-3-4,...), and must all have the same range and aref. + +AI Triggering: + For start_src == TRIG_EXT, the A/D EXTERNAL TRIGGER IN (pin 45) is used. + For 1602 series, the start_arg is interpreted as follows: + start_arg == 0 => gated triger (level high) + start_arg == CR_INVERT => gated triger (level low) + start_arg == CR_EDGE => Rising edge + start_arg == CR_EDGE | CR_INVERT => Falling edge + For the other boards the trigger will be done on rising edge */ /* @@ -135,6 +144,8 @@ analog triggering on 1602 series #define EXT_TRIGGER 0x2 /* external start trigger */ #define ANALOG_TRIGGER 0x3 /* external analog trigger */ #define TRIGGER_MASK 0x3 /* mask of bits that determine start trigger */ +#define TGPOL 0x04 /* invert the edge/level of the external trigger (1602 only) */ +#define TGSEL 0x08 /* if set edge triggered, otherwise level trigerred (1602 only) */ #define TGEN 0x10 /* enable external start trigger */ #define BURSTE 0x20 /* burst mode enable */ #define XTRCL 0x80 /* clear external trigger */ @@ -257,6 +268,8 @@ struct cb_pcidas_board { const struct comedi_lrange *ranges; enum trimpot_model trimpot; unsigned has_dac08:1; + unsigned has_ai_trig_gated:1; /* Tells if the AI trigger can be gated */ + unsigned has_ai_trig_invert:1; /* Tells if the AI trigger can be inverted */ }; static const struct cb_pcidas_board cb_pcidas_boards[] = { @@ -274,6 +287,8 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = { .ranges = &cb_pcidas_ranges, .trimpot = AD8402, .has_dac08 = 1, + .has_ai_trig_gated = 1, + .has_ai_trig_invert = 1, }, { .name = "pci-das1200", @@ -288,6 +303,8 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = { .ranges = &cb_pcidas_ranges, .trimpot = AD7376, .has_dac08 = 0, + .has_ai_trig_gated = 0, + .has_ai_trig_invert = 0, }, { .name = "pci-das1602/12", @@ -303,6 +320,8 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = { .ranges = &cb_pcidas_ranges, .trimpot = AD7376, .has_dac08 = 0, + .has_ai_trig_gated = 1, + .has_ai_trig_invert = 1, }, { .name = "pci-das1200/jr", @@ -317,6 +336,8 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = { .ranges = &cb_pcidas_ranges, .trimpot = AD7376, .has_dac08 = 0, + .has_ai_trig_gated = 0, + .has_ai_trig_invert = 0, }, { .name = "pci-das1602/16/jr", @@ -331,6 +352,8 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = { .ranges = &cb_pcidas_ranges, .trimpot = AD8402, .has_dac08 = 1, + .has_ai_trig_gated = 1, + .has_ai_trig_invert = 1, }, { .name = "pci-das1000", @@ -345,6 +368,8 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = { .ranges = &cb_pcidas_ranges, .trimpot = AD7376, .has_dac08 = 0, + .has_ai_trig_gated = 0, + .has_ai_trig_invert = 0, }, { .name = "pci-das1001", @@ -359,6 +384,8 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = { .ranges = &cb_pcidas_alt_ranges, .trimpot = AD7376, .has_dac08 = 0, + .has_ai_trig_gated = 0, + .has_ai_trig_invert = 0, }, { .name = "pci-das1002", @@ -373,6 +400,8 @@ static const struct cb_pcidas_board cb_pcidas_boards[] = { .ranges = &cb_pcidas_ranges, .trimpot = AD7376, .has_dac08 = 0, + .has_ai_trig_gated = 0, + .has_ai_trig_invert = 0, }, }; @@ -1113,9 +1142,27 @@ static int cb_pcidas_ai_cmdtest(struct comedi_device *dev, /* step 3: make sure arguments are trivially compatible */ - if (cmd->start_arg != 0) { - cmd->start_arg = 0; - err++; + switch (cmd->start_src) { + case TRIG_EXT: + /* External trigger, only CR_EDGE and CR_INVERT flags allowed */ + if ((cmd->start_arg + & (CR_FLAGS_MASK & ~(CR_EDGE | CR_INVERT))) != 0) { + cmd->start_arg &= + ~(CR_FLAGS_MASK & ~(CR_EDGE | CR_INVERT)); + err++; + } + if (!thisboard->has_ai_trig_invert && + (cmd->start_arg & CR_INVERT)) { + cmd->start_arg &= (CR_FLAGS_MASK & ~CR_INVERT); + err++; + } + break; + default: + if (cmd->start_arg != 0) { + cmd->start_arg = 0; + err++; + } + break; } if (cmd->scan_begin_src == TRIG_TIMER) { @@ -1270,9 +1317,14 @@ static int cb_pcidas_ai_cmd(struct comedi_device *dev, bits = 0; if (cmd->start_src == TRIG_NOW) bits |= SW_TRIGGER; - else if (cmd->start_src == TRIG_EXT) + else if (cmd->start_src == TRIG_EXT) { bits |= EXT_TRIGGER | TGEN | XTRCL; - else { + if (thisboard->has_ai_trig_invert + && (cmd->start_arg & CR_INVERT)) + bits |= TGPOL; + if (thisboard->has_ai_trig_gated && (cmd->start_arg & CR_EDGE)) + bits |= TGSEL; + } else { comedi_error(dev, "bug!"); return -1; } |