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cc3200: New ADC API.

This commit is contained in:
Daniel Campora 2015-09-14 20:03:32 +02:00
parent 0e52d9860a
commit 22b4c28f85
7 changed files with 371 additions and 78 deletions
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18
cc3200/boards/make-pins.py
View File

@ -35,6 +35,8 @@ class AF:
def __init__(self, name, idx, fn, unit, type):
self.name = name
self.idx = idx
if self.idx > 15:
self.idx = -1
self.fn = fn
self.unit = unit
self.type = type
@ -57,12 +59,16 @@ class Pin:
def print(self):
print('// {}'.format(self.name))
print('const pin_af_t pin_{}_af[] = {{'.format(self.name))
for af in self.afs:
af.print()
print('};')
print('pin_obj_t pin_{:4s} = PIN({:6s}, {:1d}, {:3d}, {:2d}, pin_{}_af, {});\n'.format(
self.name, self.name, self.port, self.gpio_bit, self.pin_num, self.name, len(self.afs)))
if len(self.afs):
print('const pin_af_t pin_{}_af[] = {{'.format(self.name))
for af in self.afs:
af.print()
print('};')
print('pin_obj_t pin_{:4s} = PIN({:6s}, {:1d}, {:3d}, {:2d}, pin_{}_af, {});\n'.format(
self.name, self.name, self.port, self.gpio_bit, self.pin_num, self.name, len(self.afs)))
else:
print('pin_obj_t pin_{:4s} = PIN({:6s}, {:1d}, {:3d}, {:2d}, NULL, 0);\n'.format(
self.name, self.name, self.port, self.gpio_bit, self.pin_num))
def print_header(self, hdr_file):
hdr_file.write('extern pin_obj_t pin_{:s};\n'.format(self.name))

260
cc3200/mods/pybadc.c
View File

@ -52,17 +52,6 @@
#include "mpexception.h"
/// \moduleref pyb
/// \class ADC - analog to digital conversion: read analog values on a pin
///
/// Usage:
///
/// adc = pyb.ADC('GP5') # create an adc object on the given pin (GP2, GP3, GP4 o GP5)
/// adc.read() # read channel value
///
/// The sample rate is fixed to 62.5KHz and the resolution to 12 bits.
/******************************************************************************
DECLARE CONSTANTS
******************************************************************************/
@ -71,32 +60,69 @@
/******************************************************************************
DEFINE TYPES
******************************************************************************/
typedef struct {
mp_obj_base_t base;
bool enabled;
} pyb_adc_obj_t;
typedef struct {
mp_obj_base_t base;
pin_obj_t *pin;
byte channel;
byte id;
} pyb_adc_obj_t;
bool enabled;
} pyb_adc_channel_obj_t;
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
STATIC pyb_adc_obj_t pyb_adc_obj[PYB_ADC_NUM_CHANNELS] = { {.pin = &pin_GP2, .channel = ADC_CH_0, .id = 1}, {.pin = &pin_GP3, .channel = ADC_CH_1, .id = 2},
{.pin = &pin_GP4, .channel = ADC_CH_2, .id = 2}, {.pin = &pin_GP5, .channel = ADC_CH_3, .id = 4} };
STATIC pyb_adc_channel_obj_t pyb_adc_channel_obj[PYB_ADC_NUM_CHANNELS] = { {.pin = &pin_GP2, .channel = ADC_CH_0, .id = 0, .enabled = false},
{.pin = &pin_GP3, .channel = ADC_CH_1, .id = 1, .enabled = false},
{.pin = &pin_GP4, .channel = ADC_CH_2, .id = 2, .enabled = false},
{.pin = &pin_GP5, .channel = ADC_CH_3, .id = 3, .enabled = false} };
STATIC pyb_adc_obj_t pyb_adc_obj = {.enabled = false};
STATIC const mp_obj_type_t pyb_adc_channel_type;
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
STATIC mp_obj_t adc_channel_deinit(mp_obj_t self_in);
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
STATIC void pybadc_init (pyb_adc_obj_t *self) {
// configure the pin in analog mode
pin_config (self->pin, -1, PIN_TYPE_ANALOG, PIN_TYPE_STD, -1, PIN_STRENGTH_2MA);
// enable the ADC channel
MAP_ADCChannelEnable(ADC_BASE, self->channel);
STATIC void pyb_adc_init (pyb_adc_obj_t *self) {
// enable and configure the timer
MAP_ADCTimerConfig(ADC_BASE, (1 << 17) - 1);
MAP_ADCTimerEnable(ADC_BASE);
// enable the ADC peripheral
MAP_ADCEnable(ADC_BASE);
self->enabled = true;
}
STATIC void pyb_adc_check_init(void) {
// not initialized
if (!pyb_adc_obj.enabled) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
}
}
STATIC void pyb_adc_channel_init (pyb_adc_channel_obj_t *self) {
// the ADC block must be enabled first
pyb_adc_check_init();
// configure the pin in analog mode
pin_config (self->pin, -1, PIN_TYPE_ANALOG, PIN_TYPE_STD, -1, PIN_STRENGTH_2MA);
// enable the ADC channel
MAP_ADCChannelEnable(ADC_BASE, self->channel);
self->enabled = true;
}
STATIC void pyb_adc_deinit_all_channels (void) {
for (int i = 0; i < PYB_ADC_NUM_CHANNELS; i++) {
adc_channel_deinit(&pyb_adc_channel_obj[i]);
}
}
/******************************************************************************/
@ -104,73 +130,109 @@ STATIC void pybadc_init (pyb_adc_obj_t *self) {
STATIC void adc_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
pyb_adc_obj_t *self = self_in;
mp_printf(print, "<ADC1 channel=%u on %q>", self->id, self->pin->name);
}
/// \classmethod \constructor(pin)
/// Create an ADC object associated with the given pin.
/// This allows you to then read analog values on that pin.
STATIC mp_obj_t adc_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
// check number of arguments
mp_arg_check_num(n_args, n_kw, 1, 1, false);
// the argument passed is the pin
const pin_obj_t *pin = (pin_obj_t *)pin_find(args[0]);
for (int32_t idx = 0; idx < PYB_ADC_NUM_CHANNELS; idx++) {
if (pin == pyb_adc_obj[idx].pin) {
pyb_adc_obj_t *self = &pyb_adc_obj[idx];
self->base.type = &pyb_adc_type;
pybadc_init (self);
// register it with the sleep module
pybsleep_add ((const mp_obj_t)self, (WakeUpCB_t)pybadc_init);
return self;
}
if (self->enabled) {
mp_printf(print, "ADC(0, bits=12)");
} else {
mp_printf(print, "ADC(0)");
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
/// \method read()
/// Read the value on the analog pin and return it. The returned value
/// will be between 0 and 4095.
STATIC mp_obj_t adc_read(mp_obj_t self_in) {
pyb_adc_obj_t *self = self_in;
uint32_t sample;
STATIC const mp_arg_t pyb_adc_init_args[] = {
{ MP_QSTR_id, MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 12} },
};
STATIC mp_obj_t adc_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *all_args) {
// parse args
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, all_args + n_args);
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_adc_init_args)];
mp_arg_parse_all(n_args, all_args, &kw_args, MP_ARRAY_SIZE(args), pyb_adc_init_args, args);
// wait until a new value is available
while (!MAP_ADCFIFOLvlGet(ADC_BASE, self->channel));
// read the sample
sample = MAP_ADCFIFORead(ADC_BASE, self->channel);
// the 12 bit sampled value is stored in bits [13:2]
return MP_OBJ_NEW_SMALL_INT((sample & 0x3FFF) >> 2);
// check the peripheral id
if (args[0].u_int != 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_resource_not_avaliable));
}
// check the number of bits
if (args[1].u_int != 12) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
// setup the object
pyb_adc_obj_t *self = &pyb_adc_obj;
self->base.type = &pyb_adc_type;
// initialize and register with the sleep module
pyb_adc_init(self);
pybsleep_add ((const mp_obj_t)self, (WakeUpCB_t)pyb_adc_init);
return self;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_read_obj, adc_read);
/// \method init()
/// Enable the adc channel
STATIC mp_obj_t adc_init(mp_obj_t self_in) {
pyb_adc_obj_t *self = self_in;
pybadc_init(self);
STATIC mp_obj_t adc_init(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_adc_init_args) - 1];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), &pyb_adc_init_args[1], args);
// check the number of bits
if (args[0].u_int != 12) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
pyb_adc_init(pos_args[0]);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_init_obj, adc_init);
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(adc_init_obj, 1, adc_init);
/// \method deinit()
/// Disable the adc channel
STATIC mp_obj_t adc_deinit(mp_obj_t self_in) {
pyb_adc_obj_t *self = self_in;
MAP_ADCChannelDisable(ADC_BASE, self->channel);
// first deinit all channels
pyb_adc_deinit_all_channels();
MAP_ADCDisable(ADC_BASE);
self->enabled = false;
// unregister it with the sleep module
pybsleep_remove ((const mp_obj_t)self);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_deinit_obj, adc_deinit);
STATIC mp_obj_t adc_channel(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
STATIC const mp_arg_t pyb_adc_channel_args[] = {
{ MP_QSTR_id, MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_pin, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_adc_channel_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), pyb_adc_channel_args, args);
uint ch_id;
if (args[0].u_obj != mp_const_none) {
ch_id = mp_obj_get_int(args[0].u_obj);
if (ch_id >= PYB_ADC_NUM_CHANNELS) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_os_resource_not_avaliable));
}
else if (args[1].u_obj != mp_const_none) {
uint pin_ch_id = pin_find_peripheral_type (args[1].u_obj, PIN_FN_ADC, 0);
if (ch_id != pin_ch_id) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
}
} else {
ch_id = pin_find_peripheral_type (args[1].u_obj, PIN_FN_ADC, 0);
}
// setup the object
pyb_adc_channel_obj_t *self = &pyb_adc_channel_obj[ch_id];
self->base.type = &pyb_adc_channel_type;
pyb_adc_channel_init (self);
// register it with the sleep module
pybsleep_add ((const mp_obj_t)self, (WakeUpCB_t)pyb_adc_channel_init);
return self;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(adc_channel_obj, 1, adc_channel);
STATIC const mp_map_elem_t adc_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&adc_read_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&adc_init_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&adc_deinit_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_channel), (mp_obj_t)&adc_channel_obj },
};
STATIC MP_DEFINE_CONST_DICT(adc_locals_dict, adc_locals_dict_table);
@ -183,3 +245,69 @@ const mp_obj_type_t pyb_adc_type = {
.locals_dict = (mp_obj_t)&adc_locals_dict,
};
STATIC void adc_channel_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
pyb_adc_channel_obj_t *self = self_in;
if (self->enabled) {
mp_printf(print, "ADCChannel(%u, pin=%q)", self->id, self->pin->name);
} else {
mp_printf(print, "ADCChannel(%u)", self->id);
}
}
STATIC mp_obj_t adc_channel_init(mp_obj_t self_in) {
pyb_adc_channel_obj_t *self = self_in;
// re-enable it
pyb_adc_channel_init(self);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_channel_init_obj, adc_channel_init);
STATIC mp_obj_t adc_channel_deinit(mp_obj_t self_in) {
pyb_adc_channel_obj_t *self = self_in;
MAP_ADCChannelDisable(ADC_BASE, self->channel);
// unregister it with the sleep module
pybsleep_remove ((const mp_obj_t)self);
self->enabled = false;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_channel_deinit_obj, adc_channel_deinit);
STATIC mp_obj_t adc_channel_value(mp_obj_t self_in) {
pyb_adc_channel_obj_t *self = self_in;
uint32_t value;
// the channel must be enabled
if (!self->enabled) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
}
// wait until a new value is available
while (!MAP_ADCFIFOLvlGet(ADC_BASE, self->channel));
// read the sample
value = MAP_ADCFIFORead(ADC_BASE, self->channel);
// the 12 bit sampled value is stored in bits [13:2]
return MP_OBJ_NEW_SMALL_INT((value & 0x3FFF) >> 2);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_channel_value_obj, adc_channel_value);
STATIC mp_obj_t adc_channel_call(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 0, false);
return adc_channel_value (self_in);
}
STATIC const mp_map_elem_t adc_channel_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&adc_channel_init_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&adc_channel_deinit_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_value), (mp_obj_t)&adc_channel_value_obj },
};
STATIC MP_DEFINE_CONST_DICT(adc_channel_locals_dict, adc_channel_locals_dict_table);
STATIC const mp_obj_type_t pyb_adc_channel_type = {
{ &mp_type_type },
.name = MP_QSTR_ADCChannel,
.print = adc_channel_print,
.call = adc_channel_call,
.locals_dict = (mp_obj_t)&adc_channel_locals_dict,
};

10
cc3200/mods/pybpin.c
View File

@ -184,6 +184,16 @@ uint8_t pin_find_peripheral_unit (const mp_obj_t pin, uint8_t fn, uint8_t type)
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
uint8_t pin_find_peripheral_type (const mp_obj_t pin, uint8_t fn, uint8_t unit) {
pin_obj_t *pin_o = pin_find(pin);
for (int i = 0; i < pin_o->num_afs; i++) {
if (pin_o->af_list[i].fn == fn && pin_o->af_list[i].unit == unit) {
return pin_o->af_list[i].type;
}
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/

11
cc3200/mods/pybpin.h
View File

@ -85,15 +85,15 @@ enum {
};
enum {
PIN_TYPE_ADC_CH0 = -1,
PIN_TYPE_ADC_CH1 = -1,
PIN_TYPE_ADC_CH2 = -1,
PIN_TYPE_ADC_CH3 = -1,
PIN_TYPE_ADC_CH0 = 0,
PIN_TYPE_ADC_CH1,
PIN_TYPE_ADC_CH2,
PIN_TYPE_ADC_CH3,
};
typedef struct {
qstr name;
uint8_t idx;
int8_t idx;
uint8_t fn;
uint8_t unit;
uint8_t type;
@ -136,5 +136,6 @@ void pin_config(pin_obj_t *self, int af, uint mode, uint type, int value, uint s
pin_obj_t *pin_find(mp_obj_t user_obj);
void pin_assign_pins_af (mp_obj_t *pins, uint32_t n_pins, uint32_t pull, uint32_t fn, uint32_t unit);
uint8_t pin_find_peripheral_unit (const mp_obj_t pin, uint8_t fn, uint8_t type);
uint8_t pin_find_peripheral_type (const mp_obj_t pin, uint8_t fn, uint8_t unit);
#endif // PYBPIN_H_

6
cc3200/qstrdefsport.h
View File

@ -177,9 +177,13 @@ Q(MASTER)
// for ADC class
Q(ADC)
Q(read)
Q(ADCChannel)
Q(value)
Q(init)
Q(deinit)
Q(channel)
Q(id)
Q(pin)
#if MICROPY_HW_HAS_SDCARD
// for SD class

116
tests/wipy/adc.py Normal file
View File

@ -0,0 +1,116 @@
'''
ADC test for the CC3200 based boards.
'''
from pyb import ADC
from pyb import Pin
import os
machine = os.uname().machine
if 'LaunchPad' in machine:
adc_pin = 'GP5'
adc_channel = 3
elif 'WiPy' in machine:
adc_pin = 'GP3'
adc_channel = 1
else:
raise Exception('Board not supported!')
adc = ADC(0)
print(adc)
adc = ADC()
print(adc)
adc = ADC(0, bits=12)
print(adc)
apin = adc.channel(adc_channel)
print(apin)
apin = adc.channel(id=adc_channel)
print(apin)
apin = adc.channel(adc_channel, pin=adc_pin)
print(apin)
apin = adc.channel(id=adc_channel, pin=adc_pin)
print(apin)
print(apin.value() > 3000)
print(apin() > 3000)
# de-init must work
apin.deinit()
print(apin)
adc.deinit()
print(adc)
print(apin)
adc.init()
print(adc)
print(apin)
apin.init()
print(apin)
print(apin() > 3000)
# check for memory leaks...
for i in range (0, 1000):
adc = ADC()
apin = adc.channel(adc_channel)
# next ones should raise
try:
adc = ADC(bits=17)
except:
print('Exception')
try:
adc = ADC(id=1)
except:
print('Exception')
try:
adc = ADC(0, 16)
except:
print('Exception')
adc = ADC()
try:
apin = adc.channel(4)
except:
print('Exception')
try:
apin = adc.channel(-1)
except:
print('Exception')
try:
apin = adc.channel(0, pin='GP3')
except:
print('Exception')
apin = adc.channel(1)
apin.deinit()
try:
apin()
except:
print('Exception')
try:
apin.value()
except:
print('Exception')
adc.deinit()
try:
apin.value()
except:
print('Exception')
try:
apin = adc.channel(1)
except:
print('Exception')
# re-init must work
adc.init()
apin.init()
print(apin)
print(apin() > 3000)

28
tests/wipy/adc.py.exp Normal file
View File

@ -0,0 +1,28 @@
ADC(0, bits=12)
ADC(0, bits=12)
ADC(0, bits=12)
ADCChannel(1, pin=GP3)
ADCChannel(1, pin=GP3)
ADCChannel(1, pin=GP3)
ADCChannel(1, pin=GP3)
True
True
ADCChannel(1)
ADC(0)
ADCChannel(1)
ADC(0, bits=12)
ADCChannel(1)
ADCChannel(1, pin=GP3)
True
Exception
Exception
Exception
Exception
Exception
Exception
Exception
Exception
Exception
Exception
ADCChannel(1, pin=GP3)
True