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Add support for STM32 Potentiometer via ADC3

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4252 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
2012-01-02 18:22:19 +00:00
parent 3d3bc75c12
commit 4f07eda719
10 changed files with 244 additions and 58 deletions
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nuttx/configs/stm3240g-eval/src/up_adc.c
+43 -4
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@@ -2,7 +2,7 @@
* configs/stm3240g-eval/src/up_adc.c
* arch/arm/src/board/up_adc.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
@@ -73,6 +73,30 @@
#endif
#if defined(CONFIG_STM32_ADC1) || defined(CONFIG_STM32_ADC2) || defined(CONFIG_STM32_ADC3)
#ifndef CONFIG_STM32_ADC3
# warning "Channel information only available for ADC3"
#endif
/* The number of ADC channels in the conversion list */
#define ADC3_NCHANNELS 1
/************************************************************************************
* Private Data
************************************************************************************/
/* The STM3240G-EVAL has a 10 Kohm potentiometer RV1 connected to PF9 of
* STM32F407IGH6 on the board: TIM14_CH1/FSMC_CD/ADC3_IN7
*/
/* Identifying number of each ADC channel: Variable Resistor. */
#ifdef CONFIG_STM32_ADC3
static const uint8_t g_chanlist[ADC3_NCHANNELS] = {7};
/* Configurations of pins used byte each ADC channels */
static const uint32_t g_pinlist[ADC3_NCHANNELS] = {GPIO_ADC3_IN7};
#endif
/************************************************************************************
* Private Functions
@@ -93,19 +117,31 @@
int adc_devinit(void)
{
#ifdef CONFIG_STM32_ADC3
static bool initialized = false;
struct adc_dev_s *adc;
int ret;
int i;
/* Check if we have already initialized */
if (!initialized)
{
/* Configure the pins as analog inputs for the selected channels */
#warning "Missing Logic"
for (i = 0; i < ADC3_NCHANNELS; i++)
{
stm32_configgpio(g_pinlist[i]);
}
/* Call stm32_adcinitialize() to get an instance of the ADC interface */
#warning "Missing Logic"
adc = stm32_adcinitialize(1, g_chanlist, ADC3_NCHANNELS);
if (adc == NULL)
{
adbg("ERROR: Failed to get ADC interface\n");
return -ENODEV;
}
/* Register the ADC driver at "/dev/adc0" */
@@ -122,7 +158,10 @@ int adc_devinit(void)
}
return OK;
#else
return -ENOSYS;
#endif
}
#endif /* CONFIG_STM32_ADC || CONFIG_STM32_ADC2 || CONFIG_STM32_ADC3 */
#endif /* CONFIG_STM32_ADC1 || CONFIG_STM32_ADC2 || CONFIG_STM32_ADC3 */
#endif /* CONFIG_ADC */