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* ADC implemented and tested.

pull/1243/head
akhilpanayam 2015-07-03 18:42:03 +05:30 committed by Karthik Purushothaman
parent 1dae16c898
commit db7a269a89
2 changed files with 142 additions and 10 deletions
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151
libraries/mbed/targets/hal/TARGET_Atmel/TARGET_SAM21/analogin_api.c
View File

@ -20,11 +20,132 @@
#include "pinmap.h"
#include "PeripheralPins.h"
#include "adc.h"
#include "status_codes.h"
struct adc_module adc_instance;
void adc_configure_ain_pin(uint32_t pin)
{
#define PIN_INVALID_ADC_AIN 0xFFFFUL
/* Pinmapping table for AINxx -> GPIO pin number */
const uint32_t pinmapping[] = {
#if (SAMD20E | SAMD21E)
PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5,
PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17,
PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19,
#elif (SAMD20G | SAMD21G)
PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1,
PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3,
PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5,
PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17,
PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19,
#elif (SAMD20J | SAMD21J)
PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1,
PIN_PB08B_ADC_AIN2, PIN_PB09B_ADC_AIN3,
PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5,
PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7,
PIN_PB00B_ADC_AIN8, PIN_PB01B_ADC_AIN9,
PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11,
PIN_PB04B_ADC_AIN12, PIN_PB05B_ADC_AIN13,
PIN_PB06B_ADC_AIN14, PIN_PB07B_ADC_AIN15,
PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17,
PIN_PA10B_ADC_AIN18, PIN_PA11B_ADC_AIN19,
#elif SAMR21E
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
#elif SAMR21G
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PA04B_ADC_AIN4, PIN_PA05B_ADC_AIN5,
PIN_PA06B_ADC_AIN6, PIN_PA07B_ADC_AIN7,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PB02B_ADC_AIN10, PIN_PB03B_ADC_AIN11,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PA08B_ADC_AIN16, PIN_PA09B_ADC_AIN17,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
#elif (SAMD10C | SAMD11C)
PIN_PA02B_ADC_AIN0, PIN_INVALID_ADC_AIN,
PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
#elif (SAMD10DS | SAMD11DS)
PIN_PA02B_ADC_AIN0, PIN_INVALID_ADC_AIN,
PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3,
PIN_PA06B_ADC_AIN4, PIN_PA07B_ADC_AIN5,
PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
#elif (SAMD10DM | SAMD11DM)
PIN_PA02B_ADC_AIN0, PIN_PA03B_ADC_AIN1,
PIN_PA04B_ADC_AIN2, PIN_PA05B_ADC_AIN3,
PIN_PA06B_ADC_AIN4, PIN_PA07B_ADC_AIN5,
PIN_PA14B_ADC_AIN6, PIN_PA15B_ADC_AIN7,
PIN_PA10B_ADC_AIN8, PIN_PA11B_ADC_AIN9,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
PIN_INVALID_ADC_AIN, PIN_INVALID_ADC_AIN,
#else
# error ADC pin mappings are not defined for this device.
#endif
};
uint32_t pin_map_result = PIN_INVALID_ADC_AIN;
if (pin <= ADC_EXTCHANNEL_MSB) {
pin_map_result = pinmapping[pin >> ADC_INPUTCTRL_MUXPOS_Pos];
Assert(pin_map_result != PIN_INVALID_ADC_AIN);
struct system_pinmux_config config;
system_pinmux_get_config_defaults(&config);
/* Analog functions are all on MUX setting B */
config.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
config.mux_position = 1;
system_pinmux_pin_set_config(pin_map_result, &config);
}
}
void analogin_init(analogin_t *obj, PinName pin)
{
struct adc_config config_adc;
uint32_t pos_input;
static uint8_t init_flag = 0;
struct system_pinmux_config config;
switch(pin) {
case PA04:
@ -52,26 +173,36 @@ void analogin_init(analogin_t *obj, PinName pin)
pos_input = ADC_INPUTCTRL_MUXPOS_PIN11;
break;
default:
pos_input = ADC_INPUTCTRL_MUXPOS_PIN4; // MBED_ASSERT
pos_input = ADC_INPUTCTRL_MUXPOS_PIN4;
break;
}
adc_get_config_defaults(&(obj->adc_instance));
config_adc.positive_input = pos_input;
adc_init(&(obj->adc_instance), ADC, &config_adc);
adc_enable(&(obj->adc_instance));
adc_get_config_defaults(&(obj->config_adc));
obj->config_adc.positive_input = pos_input;
if (init_flag == 0) {
adc_init(&adc_instance, ADC, &(obj->config_adc));
adc_enable(&adc_instance);
adc_start_conversion(&adc_instance);
init_flag = 1;
} else {
adc_configure_ain_pin(obj->config_adc.positive_input);
adc_configure_ain_pin(obj->config_adc.negative_input);
}
}
uint16_t analogin_read_u16(analogin_t *obj)
{
uint16_t result;
adc_start_conversion(&(obj->adc_instance));
adc_read(&(obj->adc_instance), &result);
adc_set_positive_input(&adc_instance, obj->config_adc.positive_input);
adc_set_negative_input(&adc_instance, obj->config_adc.negative_input);
adc_start_conversion(&adc_instance);
adc_read(&(adc_instance), &result);
return result;
}
float analogin_read(analogin_t *obj)
{
uint16_t value = analogin_read_u16(obj);
return (float)value * (1.0f / (float)0xFFFF);
return (float)value * (1.0f / (float)0xFFF);
}

1
libraries/mbed/targets/hal/TARGET_Atmel/TARGET_SAM21/objects.h
View File

@ -67,6 +67,7 @@ struct serial_s {
struct analogin_s {
ADCName adc;
struct adc_module adc_instance;
struct adc_config config_adc;
};
/*
struct pwmout_s {