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发表于 2016-9-6 10:16:29
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这个是例程的源码，用的是LWADC的驱动
本帖最后由 gdgn526345 于 2016-9-6 10:17 编辑
/*HEADER**********************************************************************
*
* Copyright 2008 Freescale Semiconductor, Inc.
* Copyright 2011 Embedded Access Inc.
*
* This software is owned or controlled by Freescale Semiconductor.
* Use of this software is governed by the Freescale MQX RTOS License
* distributed with this Material.
* See the MQX_RTOS_LICENSE file distributed for more details.
*
* Brief License Summary:
* This software is provided in source form for you to use free of charge,
* but it is not open source software. You are allowed to use this software
* but you cannot redistribute it or derivative works of it in source form.
* The software may be used only in connection with a product containing
* a Freescale microprocessor, microcontroller, or digital signal processor.
* See license agreement file for full license terms including other
* restrictions.
*****************************************************************************
*
* Comments:
*
* This file contains the source for the hello example program.
*
*
*END************************************************************************/
#include <mqx.h>
#include <bsp.h>
#include <fio.h>
#if ! BSPCFG_ENABLE_IO_SUBSYSTEM
#error This application requires BSPCFG_ENABLE_IO_SUBSYSTEM defined non-zero in user_config.h. Please recompile BSP with this option.
#endif
#ifndef BSP_DEFAULT_IO_CHANNEL_DEFINED
#error This application requires BSP_DEFAULT_IO_CHANNEL to be not NULL. Please set corresponding BSPCFG_ENABLE_TTYx to non-zero in user_config.h and recompile BSP with this option.
#endif
#ifndef BSP_DEFAULT_LWADC_MODULE
#error This application requires BSP_DEFAULT_LWADC_MODULE to be not defined in the BSP. Please recompile BSP with this option.
#endif
#ifndef BSP_ADC_POTENTIOMETER
#error This application requires BSP_ADC_POTENTIOMETER to be defined in the BSP. Please recompile BSP with this option.
#endif
extern void test_task(uint32_t);
extern const LWADC_INIT_STRUCT BSP_DEFAULT_LWADC_MODULE;
const TASK_TEMPLATE_STRUCT MQX_template_list[] =
{
/* Task Index, Function, Stack, Priority, Name, Attributes, Param, Time Slice */
{ 1, test_task, 2000, 8, "test_task", MQX_AUTO_START_TASK, 0, 0 },
{ 0 }
};
typedef struct adc_demo_struct {
const char * name;
uint32_t input;
} ADC_DEMO_STRUCT;
/* This structure defines the generic ADCs available on this board. The structure will be populated based on
** what generic ADCs are defined in the BSP. The generic ADCs currently supported are:
** Potentiometer: BSP_ADC_POTENTIOMETER
** Up to 8 generic ADC inputs: BSP_ADC_INPUT_0..BSP_ADC_INPUT_7
** One TWRPI ADC interface: BSP_ADC_TWRPI_PINx
** Tower primary elevator BSP_ADC_TWR_AN0..BSP_ADC_TWR_AN7
** Tower secondary elevator BSP_ADC_TWR_AN8..BSP_ADC_TWR_AN13
** Core voltage: BSP_ADC_VDD_CORE
** Temperature: BSP_ADC_TEMPERATURE */
const ADC_DEMO_STRUCT adc_inputs[] = {
#ifdef BSP_ADC_POTENTIOMETER
{"Potentiometer", BSP_ADC_POTENTIOMETER },
#endif
#ifdef BSP_ADC_INPUT_0
{"Generic input #0", BSP_ADC_INPUT_0 },
#endif
#ifdef BSP_ADC_INPUT_1
{"Generic input #1", BSP_ADC_INPUT_1 },
#endif
#ifdef BSP_ADC_INPUT_2
{"Generic input #2", BSP_ADC_INPUT_2 },
#endif
#ifdef BSP_ADC_INPUT_3
{"Generic input #3", BSP_ADC_INPUT_3 },
#endif
#ifdef BSP_ADC_INPUT_4
{"Generic input #4", BSP_ADC_INPUT_4 },
#endif
#ifdef BSP_ADC_INPUT_5
{"Generic input #5", BSP_ADC_INPUT_5 },
#endif
#ifdef BSP_ADC_INPUT_6
{"Generic input #6", BSP_ADC_INPUT_6 },
#endif
#ifdef BSP_ADC_INPUT_7
{"Generic input #7", BSP_ADC_INPUT_7 },
#endif
#ifdef BSP_ADC_TWRPI_PIN8
{"TWRPI Pin#8", BSP_ADC_TWRPI_PIN8 },
#endif
#ifdef BSP_ADC_TWRPI_PIN9
{"TWRPI Pin#9", BSP_ADC_TWRPI_PIN9 },
#endif
#ifdef BSP_ADC_TWRPI_PIN12
{"TWRPI Pin#12", BSP_ADC_TWRPI_PIN12 },
#endif
#ifdef BSP_ADC_TWRPI_PIN17
{"TWRPI Pin#17", BSP_ADC_TWRPI_PIN17 },
#endif
#ifdef BSP_ADC_TWRPI_PIN18
{"TWRPI Pin#18", BSP_ADC_TWRPI_PIN18 },
#endif
#ifdef BSP_ADC_TWR_AN0
{"Primary Elevator AN0", BSP_ADC_TWR_AN0 },
#endif
#ifdef BSP_ADC_TWR_AN1
{"Primary Elevator AN1", BSP_ADC_TWR_AN1 },
#endif
#ifdef BSP_ADC_TWR_AN2
{"Primary Elevator AN2", BSP_ADC_TWR_AN2 },
#endif
#ifdef BSP_ADC_TWR_AN3
{"Primary Elevator AN3", BSP_ADC_TWR_AN3 },
#endif
#ifdef BSP_ADC_TWR_AN4
{"Primary Elevator AN4", BSP_ADC_TWR_AN4 },
#endif
#ifdef BSP_ADC_TWR_AN5
{"Primary Elevator AN5", BSP_ADC_TWR_AN5 },
#endif
#ifdef BSP_ADC_TWR_AN6
{"Primary Elevator AN6", BSP_ADC_TWR_AN6 },
#endif
#ifdef BSP_ADC_TWR_AN7
{"Primary Elevator AN7", BSP_ADC_TWR_AN7 },
#endif
#ifdef BSP_ADC_TWR_AN8
{"Secondary Elevator AN8", BSP_ADC_TWR_AN8 },
#endif
#ifdef BSP_ADC_TWR_AN9
{"Secondary Elevator AN9", BSP_ADC_TWR_AN9 },
#endif
#ifdef BSP_ADC_TWR_AN10
{"Secondary Elevator AN10", BSP_ADC_TWR_AN10 },
#endif
#ifdef BSP_ADC_TWR_AN11
{"Secondary Elevator AN11", BSP_ADC_TWR_AN11 },
#endif
#ifdef BSP_ADC_TWR_AN12
{"Secondary Elevator AN12", BSP_ADC_TWR_AN12 },
#endif
#ifdef BSP_ADC_TWR_AN13
{"Secondary Elevator AN13", BSP_ADC_TWR_AN13 },
#endif
#ifdef BSP_ADC_VDD_CORE
{"Core VDD", BSP_ADC_VDD_CORE },
#endif
#ifdef BSP_ADC_TEMPERATURE
{"Temperature", BSP_ADC_TEMPERATURE },
#endif
};
static void print_lwadc_attribute( LWADC_STRUCT_PTR lwadc_ptr, LWADC_ATTRIBUTE attribute, const char * name)
{
uint32_t value;
if (_lwadc_get_attribute(lwadc_ptr,attribute,&value)) {
printf("%-30s = 0x%08x (%d)\n", name,value,value);
} else {
printf("%-30s not supported\n", name);
}
}
#define PRINT_LWADC_ATTRIBUTE(p,x) print_lwadc_attribute(p,x,#x)
static void print_all_lwadc_attributes( LWADC_STRUCT_PTR lwadc_ptr)
{
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_RESOLUTION);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_REFERENCE);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_FREQUENCY);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_DIVIDER);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_DIFFERENTIAL);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_POWER_DOWN);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_NUMERATOR);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_DENOMINATOR);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_FORMAT);
PRINT_LWADC_ATTRIBUTE(lwadc_ptr, LWADC_INPUT_CONVERSION_ENABLE);
}
static void monitor_potentiometer(uint32_t input, uint32_t max_range)
{
LWADC_STRUCT potentiometer;
LWADC_VALUE percent, last = MAX_UINT_32, min_percent = 100, max_percent = 0;
uint32_t resolution, reference;
printf("Monitoring potentiometer\n");
/* Initialize an LWADC_STRUCT for the potentiometer */
_lwadc_init_input(&potentiometer,input);
/* Print out all the attributes associated with it. Some will be device-wide attributes */
print_all_lwadc_attributes(&potentiometer);
/* We want to change the default scaling of the potentiometer to return a percent instead of milli-volts.
** We change the numerator to reflect the range, and the denominator to reflect the max potentiometer value. */
if (!_lwadc_set_attribute(&potentiometer,LWADC_NUMERATOR,100)) {
printf("Error, unable to set attribute.\n");
return;
}
if (!_lwadc_get_attribute(&potentiometer,LWADC_RESOLUTION,&resolution)) {
printf("Error, unable to get attribute.\n");
return;
}
if (!_lwadc_get_attribute(&potentiometer,LWADC_REFERENCE,&reference)) {
printf("Error, unable to get attribute.\n");
return;
}
if (!_lwadc_set_attribute(&potentiometer,LWADC_DENOMINATOR,resolution*max_range/reference)) {
printf("Error, unable to set attribute.\n");
return;
}
/* Print out what we changed.*/
PRINT_LWADC_ATTRIBUTE(&potentiometer, LWADC_NUMERATOR);
PRINT_LWADC_ATTRIBUTE(&potentiometer, LWADC_DENOMINATOR);
printf("Rotate potentiometer. Test will run until readings range from 10%% to 90%% \n");
while ((min_percent>10) || (max_percent<90)) {
/* Request 10 consecutive readings, averaged and scaled. */
_lwadc_read_average(&potentiometer, 10, &percent);
/* If it is different, print it. */
if (percent != last) {
printf("potentiometer = %3d\r",percent);
last=percent;
if (percent<min_percent) min_percent=percent;
if (percent>max_percent) max_percent=percent;
}
}
printf("\n");
}
static void monitor_all_inputs(void)
{
LWADC_STRUCT_PTR lwadc_inputs;
LWADC_VALUE_PTR last;
LWADC_VALUE i,scaled, raw, delta, max_delta = 160;
printf("Monitoring all inputs\n");
lwadc_inputs = (LWADC_STRUCT_PTR) _mem_alloc_zero(ELEMENTS_OF(adc_inputs)*sizeof(LWADC_STRUCT));
last = (LWADC_VALUE_PTR) _mem_alloc_zero(ELEMENTS_OF(adc_inputs)*sizeof(LWADC_VALUE));
if ((lwadc_inputs == NULL) || (last==NULL)) {
printf("Error, Insufficient memory to run full test\n.");
_task_block();
}
for (i=0;i<ELEMENTS_OF(adc_inputs);i++) {
/* Set last value to a value out of range of the ADC. */
last = MAX_UINT_32;
if ( !_lwadc_init_input(&lwadc_inputs,adc_inputs.input) ) {
/* Failed to initialize this input. We will end up failing the reads below as well. */
printf("Failed to initialize ADC input %s\n",adc_inputs.name);
}
}
printf("Monitoring ADC Inputs\n");
while (1) {
for (i=0;i<ELEMENTS_OF(adc_inputs);i++) {
/* This waits until a new conversion is read on the channel */
if (_lwadc_wait_next(&lwadc_inputs)) {
if (_lwadc_read(&lwadc_inputs, &scaled) &&
_lwadc_read_raw(&lwadc_inputs, &raw)) {
/* Obtained data, is the change significant enough to display? */
delta = (raw>last)?raw-last:last-raw;
if (delta > max_delta) {
printf("%-30s = %04x (%d mv)\n",adc_inputs.name, raw,scaled);
last=raw;
}
}
}
}
}
}
void test_task(uint32_t initial_data)
{
printf("\n\n\nADC Test for %s\n",BSP_NAME);
_lwadc_init(&BSP_DEFAULT_LWADC_MODULE);
#ifdef BSP_ADC_POTENTIOMETER
monitor_potentiometer(BSP_ADC_POTENTIOMETER,BSP_ADC_POTENTIOMETER_MAX);
#endif
monitor_all_inputs();
}
/* EOF */
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发表于 2016-8-30 09:58:55
沉默卡
照妖镜
发表于 2016-8-31 10:42:28
