ADC2和ADC3的疑问！！

qchwu · 发表于 2014-11-21 13:31:44

目前正在使用MK60FX512VLQ12+MQX4.0构建我的系统，该芯片内部集成了4个ADC，每个ADC具有2个通道，目前我想使用ADC1、ADC2和ADC3，结合PDB形成一个6通道AD的连续采样，但是，当我将6个通道都启动后，只有ADC1的两个通道能正常工作，ADC2和ADC3的几个通道只能在系统刚刚启动时工作一会，然后从中读取的数据就为没有数据了，READ函数返回是0.
但是如果我只启用3个ADC中的任意一个，那么该ADC的两个通道都可以正常工作。
好查看了相关驱动，没能发现问题，难道MQX中只能支持一个ADC，两个通道同时工作？

#define ADC_CH1 "adc3:" /* must be #1 as the inputs are wired to ADC 1 */
#define MY_TRIGGER ADC_PDB_TRIGGER
#if !BSPCFG_ENABLE_ADC3
#error This application requires BSPCFG_ENABLE_ADC1 defined non-zero in user_config.h. Please recompile BSP with this option.
#endif /* BSPCFG_ENABLE_ADCx */
#define ADC_CH2 "adc2:" /* must be #1 as the inputs are wired to ADC 1 */
#if !BSPCFG_ENABLE_ADC2
#error This application requires BSPCFG_ENABLE_ADC1 defined non-zero in user_config.h. Please recompile BSP with this option.
#endif /* BSPCFG_ENABLE_ADCx */
#define ADC_CH3 "adc1:" /* must be #1 as the inputs are wired to ADC 1 */
#if !BSPCFG_ENABLE_ADC1
#error This application requires BSPCFG_ENABLE_ADC1 defined non-zero in user_config.h. Please recompile BSP with this option.
#endif /* BSPCFG_ENABLE_ADCx */
/* Task IDs */
#define MAIN_TASK 5
/* Function prototypes */
extern void main_task(uint_32);
const TASK_TEMPLATE_STRUCT MQX_template_list[] =
{
/* Task Index, Function, Stack, Priority, Name, Attributes, Param, Time Slice */
{MAIN_TASK, main_task, 1000, 8, "Main", MQX_AUTO_START_TASK, 0, 0 },
{0}
};
/* ADC device init struct */
const ADC_INIT_STRUCT adc_init = {
ADC_RESOLUTION_DEFAULT, /* resolution */
};
#if MQX_USE_LWEVENTS
static LWEVENT_STRUCT evn;
#endif
/* BSP_ADC_UCH1 init struct */
const ADC_INIT_CHANNEL_STRUCT adc_uch1_channel_param =
{
ADC3_SOURCE_AD17, /* physical ADC channel */
ADC_CHANNEL_MEASURE_LOOP | ADC_CHANNEL_START_TRIGGERED, /* runs continuously after IOCTL trigger */
1, /* number of samples in one run sequence */
0, /* time offset from trigger point in us */
6000, /* period in us (= 625us ) */
0x10000, /* scale range of result (not used now) */
ADC_BUFFER_SIZE, /* circular buffer size (sample count) */
MY_TRIGGER, /* logical trigger ID that starts this ADC channel */
#if MQX_USE_LWEVENTS
// &evn,
// 0x01 /* mask of event to be set */
NULL
#endif
};
/* BSP_ADC_UCH2 init struct */
const ADC_INIT_CHANNEL_STRUCT adc_uch2_channel_param =
{
ADC2_SOURCE_AD17, /* physical ADC channel */
ADC_CHANNEL_MEASURE_LOOP | ADC_CHANNEL_START_TRIGGERED, /* runs continuously after IOCTL trigger */
1, /* number of samples in one run sequence */
0, /* time offset from trigger point in us */
6000, /* period in us (= 625us ) */
0x10000, /* scale range of result (not used now) */
ADC_BUFFER_SIZE, /* circular buffer size (sample count) */
MY_TRIGGER, /* logical trigger ID that starts this ADC channel */
#if MQX_USE_LWEVENTS
// &evn,
// 0x01 /* mask of event to be set */
NULL
#endif
};
/* BSP_ADC_UCH3 init struct */
const ADC_INIT_CHANNEL_STRUCT adc_uch3_channel_param =
{
ADC1_SOURCE_AD7A, /* physical ADC channel */
ADC_CHANNEL_MEASURE_LOOP | ADC_CHANNEL_START_TRIGGERED, /* runs continuously after IOCTL trigger */
1, /* number of samples in one run sequence */
0, /* time offset from trigger point in us */
6000, /* period in us (= 625us ) */
0x10000, /* scale range of result (not used now) */
ADC_BUFFER_SIZE, /* circular buffer size (sample count) */
MY_TRIGGER, /* logical trigger ID that starts this ADC channel */
#if MQX_USE_LWEVENTS
// &evn,
// 0x01 /* mask of event to be set */
NULL
#endif
};
/* BSP_ADC_ICH1 init struct */
const ADC_INIT_CHANNEL_STRUCT adc_ich1_channel_param =
{
ADC3_SOURCE_AD16, /* physical ADC channel */
ADC_CHANNEL_MEASURE_LOOP | ADC_CHANNEL_START_TRIGGERED, /* runs continuously after IOCTL trigger */
1, /* number of samples in one run sequence */
3000, /* time offset from trigger point in us */
6000, /* period in us (= 625us ) */
0x10000, /* scale range of result (not used now) */
ADC_BUFFER_SIZE, /* circular buffer size (sample count) */
MY_TRIGGER, /* logical trigger ID that starts this ADC channel */
#if MQX_USE_LWEVENTS
// &evn,
// 0x01 /* mask of event to be set */
NULL
#endif
};
/* BSP_ADC_ICH2 init struct */
const ADC_INIT_CHANNEL_STRUCT adc_ich2_channel_param =
{
ADC2_SOURCE_AD16, /* physical ADC channel */
ADC_CHANNEL_MEASURE_LOOP | ADC_CHANNEL_START_TRIGGERED, /* runs continuously after IOCTL trigger */
1, /* number of samples in one run sequence */
3000, /* time offset from trigger point in us */
6000, /* period in us (= 625us ) */
0x10000, /* scale range of result (not used now) */
ADC_BUFFER_SIZE, /* circular buffer size (sample count) */
MY_TRIGGER, /* logical trigger ID that starts this ADC channel */
#if MQX_USE_LWEVENTS
// &evn,
// 0x01 /* mask of event to be set */
NULL
#endif
};
/* BSP_ADC_ICH3 init struct */
const ADC_INIT_CHANNEL_STRUCT adc_ich3_channel_param =
{
ADC1_SOURCE_AD6A, /* physical ADC channel */
ADC_CHANNEL_MEASURE_LOOP | ADC_CHANNEL_START_TRIGGERED, /* runs continuously after IOCTL trigger */
1, /* number of samples in one run sequence */
3000, /* time offset from trigger point in us */
6000, /* period in us (= 625us ) */
0x10000, /* scale range of result (not used now) */
ADC_BUFFER_SIZE, /* circular buffer size (sample count) */
MY_TRIGGER, /* logical trigger ID that starts this ADC channel */
#if MQX_USE_LWEVENTS
// &evn,
// 0x01 /* mask of event to be set */
NULL
#endif
};
/*TASK*-----------------------------------------------------
**
** Task Name : main_task
** Comments :
**
*END*-----------------------------------------------------*/
void main_task
(
uint_32 initial_data
)
{
ADC_RESULT_STRUCT result_data;
_mqx_int i,n;
MQX_FILE_PTR f_adc1,f_adc2,f_adc3;
MQX_FILE_PTR f_adc1_ch1,f_adc2_ch1,f_adc3_ch1;
MQX_FILE_PTR f_adc1_ch2,f_adc2_ch2,f_adc3_ch2;
uint_8 long_sample = 20;
uint_8 hw_avage = 32;
printf("\n\n-------------- Begin ADC example --------------\n\n");
#if MQX_USE_LWEVENTS
if (_lwevent_create(&evn, 0) != MQX_OK) {
printf("\nMake event failed!\n");
_task_block();
}
#endif
//ADC 1 init
#ifdef ADC_CH1
printf("Opening ADC_CH1 device ...");
f_adc1 = fopen(ADC_CH1, (const char*)&adc_init);
if(f_adc1 != NULL)
{
printf("done\n");
}
else
{
printf("failed\n");
_task_block();
}
printf("Opening ADC_CH1 channel #1 ...");
f_adc1_ch1 = fopen(ADC_CH1 "first", (const char*)&adc_uch1_channel_param);
if(f_adc1_ch1 != NULL)
{
printf("done, prepared to start by trigger\n");
}
else
{
printf("failed\n");
_task_block();
}
printf("Opening channel #2 ...");
f_adc1_ch2 = fopen(ADC_CH1 "second", (const char*)&adc_ich1_channel_param); /* ADC_CH1:2 is running now */
if(f_adc1_ch2 != NULL)
{
printf("done, one sequence started automatically\n");
}
else
{
printf("failed\n");
_task_block();
}
_time_delay(1000);
printf("Triggering ADC_CH1 channel ...");
ioctl(f_adc1, ADC_IOCTL_FIRE_TRIGGER, (pointer) MY_TRIGGER); //now start the ADC convert
printf("triggered!\n");
#endif
#ifdef ADC_CH2
printf("Opening ADC_CH2 device ...");
f_adc2 = fopen(ADC_CH2, (const char*)&adc_init);
if(f_adc2 != NULL)
{
printf("done\n");
}
else
{
printf("failed\n");
_task_block();
}
printf("Opening ADC_CH2 channel #1 ...");
f_adc2_ch1 = fopen(ADC_CH2 "first", (const char*)&adc_uch2_channel_param);
if(f_adc2_ch1 != NULL)
{
printf("done, prepared to start by trigger\n");
}
else
{
printf("failed\n");
_task_block();
}
printf("Opening ADC_CH2 channel #2 ...");
f_adc2_ch2 = fopen(ADC_CH2 "second", (const char*)&adc_ich2_channel_param); /* ADC_CH1:2 is running now */
if(f_adc2_ch2 != NULL)
{
printf("done, one sequence started automatically\n");
}
else
{
printf("failed\n");
_task_block();
}
_time_delay(1000);
printf("Triggering ADC_CH2 channel ...");
ioctl(f_adc2, ADC_IOCTL_FIRE_TRIGGER, (pointer) MY_TRIGGER); //now start the ADC convert
printf("triggered!\n");
#endif

复制代码

我知道答案目前已有1人回答

阅读全文

retome · 发表于 2014-12-8 15:41:57

我也碰到一个问题就是adc2 不知道如何触发启动dma

[求助] ADC2和ADC3的疑问！！

站长推荐 /3