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micropython/cc3200/mods/pybi2c.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2015 Daniel Campora
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include "py/mpstate.h"
#include MICROPY_HAL_H
#include "py/runtime.h"
#include "bufhelper.h"
#include "inc/hw_types.h"
#include "inc/hw_i2c.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "rom_map.h"
#include "pin.h"
#include "prcm.h"
#include "i2c.h"
#include "pybi2c.h"
#include "mpexception.h"
#include "pybsleep.h"
#include "utils.h"
#include "pybpin.h"
#include "pins.h"
/// \moduleref pyb
/// \class I2C - a two-wire serial protocol
typedef struct _pyb_i2c_obj_t {
mp_obj_base_t base;
uint baudrate;
} pyb_i2c_obj_t;
/******************************************************************************
DEFINE CONSTANTS
******************************************************************************/
#define PYBI2C_MASTER (0)
#define PYBI2C_MIN_BAUD_RATE_HZ (50000)
#define PYBI2C_MAX_BAUD_RATE_HZ (400000)
#define PYBI2C_TRANSC_TIMEOUT_MS (10)
#define PYBI2C_TRANSAC_WAIT_DELAY_US (10)
#define PYBI2C_TIMEOUT_TO_COUNT(to_us, baud) (((baud) * to_us) / 16000000)
#define RET_IF_ERR(Func) { \
if (!Func) { \
return false; \
} \
}
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
STATIC pyb_i2c_obj_t pyb_i2c_obj = {.baudrate = 0};
STATIC const mp_obj_t pyb_i2c_def_pin[2] = {&pin_GP13, &pin_GP23};
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/
// only master mode is available for the moment
STATIC void i2c_init (pyb_i2c_obj_t *self) {
// Enable the I2C Peripheral
MAP_PRCMPeripheralClkEnable(PRCM_I2CA0, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
MAP_PRCMPeripheralReset(PRCM_I2CA0);
// Configure I2C module with the specified baudrate
MAP_I2CMasterInitExpClk(I2CA0_BASE, self->baudrate);
}
STATIC bool pyb_i2c_transaction(uint cmd) {
// Convert the timeout to microseconds
int32_t timeout = PYBI2C_TRANSC_TIMEOUT_MS * 1000;
// Sanity check, t_timeout must be between 1 and 255
uint t_timeout = MIN(PYBI2C_TIMEOUT_TO_COUNT(timeout, pyb_i2c_obj.baudrate), 255);
// Clear all interrupts
MAP_I2CMasterIntClearEx(I2CA0_BASE, MAP_I2CMasterIntStatusEx(I2CA0_BASE, false));
// Set the time-out in terms of clock cycles. Not to be used with breakpoints.
MAP_I2CMasterTimeoutSet(I2CA0_BASE, t_timeout);
// Initiate the transfer.
MAP_I2CMasterControl(I2CA0_BASE, cmd);
// Wait until the current byte has been transferred.
// Poll on the raw interrupt status.
while ((MAP_I2CMasterIntStatusEx(I2CA0_BASE, false) & (I2C_MASTER_INT_DATA | I2C_MASTER_INT_TIMEOUT)) == 0) {
// wait for a few microseconds
UtilsDelay(UTILS_DELAY_US_TO_COUNT(PYBI2C_TRANSAC_WAIT_DELAY_US));
timeout -= PYBI2C_TRANSAC_WAIT_DELAY_US;
if (timeout < 0) {
// the peripheral is not responding, so stop
return false;
}
}
// Check for any errors in the transfer
if (MAP_I2CMasterErr(I2CA0_BASE) != I2C_MASTER_ERR_NONE) {
switch(cmd) {
case I2C_MASTER_CMD_BURST_SEND_START:
case I2C_MASTER_CMD_BURST_SEND_CONT:
case I2C_MASTER_CMD_BURST_SEND_STOP:
MAP_I2CMasterControl(I2CA0_BASE, I2C_MASTER_CMD_BURST_SEND_ERROR_STOP);
break;
case I2C_MASTER_CMD_BURST_RECEIVE_START:
case I2C_MASTER_CMD_BURST_RECEIVE_CONT:
case I2C_MASTER_CMD_BURST_RECEIVE_FINISH:
MAP_I2CMasterControl(I2CA0_BASE, I2C_MASTER_CMD_BURST_RECEIVE_ERROR_STOP);
break;
default:
break;
}
return false;
}
return true;
}
STATIC void pyb_i2c_check_init(pyb_i2c_obj_t *self) {
// not initialized
if (!self->baudrate) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
}
}
STATIC bool pyb_i2c_scan_device(byte devAddr) {
// Set I2C codec slave address
MAP_I2CMasterSlaveAddrSet(I2CA0_BASE, devAddr, true);
// Initiate the transfer.
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_SINGLE_RECEIVE));
// Since this is a hack, send the stop bit anyway
MAP_I2CMasterControl(I2CA0_BASE, I2C_MASTER_CMD_BURST_SEND_ERROR_STOP);
return true;
}
STATIC bool pyb_i2c_mem_addr_write (byte addr, byte *mem_addr, uint mem_addr_len) {
// Set I2C codec slave address
MAP_I2CMasterSlaveAddrSet(I2CA0_BASE, addr, false);
// Write the first byte to the controller.
MAP_I2CMasterDataPut(I2CA0_BASE, *mem_addr++);
// Initiate the transfer.
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_SEND_START));
// Loop until the completion of transfer or error
while (--mem_addr_len) {
// Write the next byte of data
MAP_I2CMasterDataPut(I2CA0_BASE, *mem_addr++);
// Transact over I2C to send the next byte
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_SEND_CONT));
}
return true;
}
STATIC bool pyb_i2c_mem_write (byte addr, byte *mem_addr, uint mem_addr_len, byte *data, uint data_len) {
if (pyb_i2c_mem_addr_write (addr, mem_addr, mem_addr_len)) {
// Loop until the completion of transfer or error
while (data_len--) {
// Write the next byte of data
MAP_I2CMasterDataPut(I2CA0_BASE, *data++);
// Transact over I2C to send the byte
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_SEND_CONT));
}
// send the stop bit
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_SEND_STOP));
return true;
}
return false;
}
STATIC bool pyb_i2c_write(byte addr, byte *data, uint len, bool stop) {
// Set I2C codec slave address
MAP_I2CMasterSlaveAddrSet(I2CA0_BASE, addr, false);
// Write the first byte to the controller.
MAP_I2CMasterDataPut(I2CA0_BASE, *data++);
// Initiate the transfer.
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_SEND_START));
// Loop until the completion of transfer or error
while (--len) {
// Write the next byte of data
MAP_I2CMasterDataPut(I2CA0_BASE, *data++);
// Transact over I2C to send the byte
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_SEND_CONT));
}
// If a stop bit is to be sent, do it.
if (stop) {
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_SEND_STOP));
}
return true;
}
STATIC bool pyb_i2c_read(byte addr, byte *data, uint len) {
// Initiate a burst or single receive sequence
uint cmd = --len > 0 ? I2C_MASTER_CMD_BURST_RECEIVE_START : I2C_MASTER_CMD_SINGLE_RECEIVE;
// Set I2C codec slave address
MAP_I2CMasterSlaveAddrSet(I2CA0_BASE, addr, true);
// Initiate the transfer.
RET_IF_ERR(pyb_i2c_transaction(cmd));
// Loop until the completion of reception or error
while (len) {
// Receive the byte over I2C
*data++ = MAP_I2CMasterDataGet(I2CA0_BASE);
if (--len) {
// Continue with reception
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_RECEIVE_CONT));
} else {
// Complete the last reception
RET_IF_ERR(pyb_i2c_transaction(I2C_MASTER_CMD_BURST_RECEIVE_FINISH));
}
}
// Receive the last byte over I2C
*data = MAP_I2CMasterDataGet(I2CA0_BASE);
return true;
}
STATIC void pyb_i2c_read_into (mp_arg_val_t *args, vstr_t *vstr) {
pyb_i2c_check_init(&pyb_i2c_obj);
// get the buffer to receive into
pyb_buf_get_for_recv(args[1].u_obj, vstr);
// receive the data
if (!pyb_i2c_read(args[0].u_int, (byte *)vstr->buf, vstr->len)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_operation_failed));
}
}
STATIC void pyb_i2c_readmem_into (mp_arg_val_t *args, vstr_t *vstr) {
pyb_i2c_check_init(&pyb_i2c_obj);
// get the buffer to receive into
pyb_buf_get_for_recv(args[2].u_obj, vstr);
// get the addresses
mp_uint_t i2c_addr = args[0].u_int;
mp_uint_t mem_addr = args[1].u_int;
// determine the width of mem_addr (1 or 2 bytes)
mp_uint_t mem_addr_size = args[3].u_int >> 3;
// write the register address to be read from
if (pyb_i2c_mem_addr_write (i2c_addr, (byte *)&mem_addr, mem_addr_size)) {
// Read the specified length of data
if (!pyb_i2c_read (i2c_addr, (byte *)vstr->buf, vstr->len)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_operation_failed));
}
}
}
/******************************************************************************/
/* Micro Python bindings */
/******************************************************************************/
STATIC void pyb_i2c_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
pyb_i2c_obj_t *self = self_in;
if (self->baudrate > 0) {
mp_printf(print, "I2C(0, I2C.MASTER, baudrate=%u)", self->baudrate);
} else {
mp_print_str(print, "I2C(0)");
}
}
STATIC mp_obj_t pyb_i2c_init_helper(pyb_i2c_obj_t *self, const mp_arg_val_t *args) {
// verify that mode is master
if (args[0].u_int != PYBI2C_MASTER) {
goto invalid_args;
}
// make sure the baudrate is between the valid range
self->baudrate = MIN(MAX(args[1].u_int, PYBI2C_MIN_BAUD_RATE_HZ), PYBI2C_MAX_BAUD_RATE_HZ);
// assign the pins
mp_obj_t pins_o = args[2].u_obj;
if (pins_o != mp_const_none) {
mp_obj_t *pins;
if (pins_o == MP_OBJ_NULL) {
// use the default pins
pins = (mp_obj_t *)pyb_i2c_def_pin;
} else {
mp_obj_get_array_fixed_n(pins_o, 2, &pins);
}
pin_assign_pins_af (pins, 2, PIN_TYPE_STD_PU, PIN_FN_I2C, 0);
}
// init the I2C bus
i2c_init(self);
// register it with the sleep module
pyb_sleep_add ((const mp_obj_t)self, (WakeUpCB_t)i2c_init);
return mp_const_none;
invalid_args:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
STATIC const mp_arg_t pyb_i2c_init_args[] = {
{ MP_QSTR_id, MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_mode, MP_ARG_INT, {.u_int = PYBI2C_MASTER} },
{ MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 100000} },
{ MP_QSTR_pins, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
};
STATIC mp_obj_t pyb_i2c_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_i2c_init_args)];
mp_arg_parse_all(n_args, all_args, &kw_args, MP_ARRAY_SIZE(args), pyb_i2c_init_args, args);
// 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));
}
// setup the object
pyb_i2c_obj_t *self = &pyb_i2c_obj;
self->base.type = &pyb_i2c_type;
// start the peripheral
pyb_i2c_init_helper(self, &args[1]);
return (mp_obj_t)self;
}
STATIC mp_obj_t pyb_i2c_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_i2c_init_args) - 1];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), &pyb_i2c_init_args[1], args);
return pyb_i2c_init_helper(pos_args[0], args);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_init_obj, 1, pyb_i2c_init);
STATIC mp_obj_t pyb_i2c_deinit(mp_obj_t self_in) {
// disable the peripheral
MAP_I2CMasterDisable(I2CA0_BASE);
MAP_PRCMPeripheralClkDisable(PRCM_I2CA0, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// invalidate the baudrate
pyb_i2c_obj.baudrate = 0;
// unregister it with the sleep module
pyb_sleep_remove ((const mp_obj_t)self_in);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_i2c_deinit_obj, pyb_i2c_deinit);
STATIC mp_obj_t pyb_i2c_scan(mp_obj_t self_in) {
pyb_i2c_check_init(&pyb_i2c_obj);
mp_obj_t list = mp_obj_new_list(0, NULL);
for (uint addr = 1; addr <= 127; addr++) {
for (int i = 0; i < 7; i++) {
if (pyb_i2c_scan_device(addr)) {
mp_obj_list_append(list, mp_obj_new_int(addr));
break;
}
}
}
return list;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_i2c_scan_obj, pyb_i2c_scan);
STATIC mp_obj_t pyb_i2c_readfrom(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
STATIC const mp_arg_t pyb_i2c_readfrom_args[] = {
{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, },
{ MP_QSTR_nbytes, MP_ARG_REQUIRED | MP_ARG_OBJ, },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_i2c_readfrom_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), pyb_i2c_readfrom_args, args);
vstr_t vstr;
pyb_i2c_read_into(args, &vstr);
// return the received data
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_readfrom_obj, 3, pyb_i2c_readfrom);
STATIC mp_obj_t pyb_i2c_readfrom_into(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
STATIC const mp_arg_t pyb_i2c_readfrom_into_args[] = {
{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, },
{ MP_QSTR_buf, MP_ARG_REQUIRED | MP_ARG_OBJ, },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_i2c_readfrom_into_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), pyb_i2c_readfrom_into_args, args);
vstr_t vstr;
pyb_i2c_read_into(args, &vstr);
// return the number of bytes received
return mp_obj_new_int(vstr.len);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_readfrom_into_obj, 1, pyb_i2c_readfrom_into);
STATIC mp_obj_t pyb_i2c_writeto(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
STATIC const mp_arg_t pyb_i2c_writeto_args[] = {
{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, },
{ MP_QSTR_buf, MP_ARG_REQUIRED | MP_ARG_OBJ, },
{ MP_QSTR_stop, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = true} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_i2c_writeto_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), pyb_i2c_writeto_args, args);
pyb_i2c_check_init(&pyb_i2c_obj);
// get the buffer to send from
mp_buffer_info_t bufinfo;
uint8_t data[1];
pyb_buf_get_for_send(args[1].u_obj, &bufinfo, data);
// send the data
if (!pyb_i2c_write(args[0].u_int, bufinfo.buf, bufinfo.len, args[2].u_bool)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_operation_failed));
}
// return the number of bytes written
return mp_obj_new_int(bufinfo.len);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_writeto_obj, 1, pyb_i2c_writeto);
STATIC mp_obj_t pyb_i2c_readfrom_mem(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
STATIC const mp_arg_t pyb_i2c_readfrom_mem_args[] = {
{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, },
{ MP_QSTR_memaddr, MP_ARG_REQUIRED | MP_ARG_INT, },
{ MP_QSTR_nbytes, MP_ARG_REQUIRED | MP_ARG_OBJ, },
{ MP_QSTR_addrsize, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_i2c_readfrom_mem_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), pyb_i2c_readfrom_mem_args, args);
vstr_t vstr;
pyb_i2c_readmem_into (args, &vstr);
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_readfrom_mem_obj, 1, pyb_i2c_readfrom_mem);
STATIC const mp_arg_t pyb_i2c_readfrom_mem_into_args[] = {
{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, },
{ MP_QSTR_memaddr, MP_ARG_REQUIRED | MP_ARG_INT, },
{ MP_QSTR_buf, MP_ARG_REQUIRED | MP_ARG_OBJ, },
{ MP_QSTR_addrsize, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} },
};
STATIC mp_obj_t pyb_i2c_readfrom_mem_into(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_i2c_readfrom_mem_into_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), pyb_i2c_readfrom_mem_into_args, args);
// get the buffer to read into
vstr_t vstr;
pyb_i2c_readmem_into (args, &vstr);
return mp_obj_new_int(vstr.len);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_readfrom_mem_into_obj, 1, pyb_i2c_readfrom_mem_into);
STATIC mp_obj_t pyb_i2c_writeto_mem(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_i2c_readfrom_mem_into_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(pyb_i2c_readfrom_mem_into_args), pyb_i2c_readfrom_mem_into_args, args);
pyb_i2c_check_init(&pyb_i2c_obj);
// get the buffer to write from
mp_buffer_info_t bufinfo;
uint8_t data[1];
pyb_buf_get_for_send(args[2].u_obj, &bufinfo, data);
// get the addresses
mp_uint_t i2c_addr = args[0].u_int;
mp_uint_t mem_addr = args[1].u_int;
// determine the width of mem_addr (1 or 2 bytes)
mp_uint_t mem_addr_size = args[3].u_int >> 3;
// write the register address to write to.
if (pyb_i2c_mem_write (i2c_addr, (byte *)&mem_addr, mem_addr_size, bufinfo.buf, bufinfo.len)) {
// return the number of bytes written
return mp_obj_new_int(bufinfo.len);
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_operation_failed));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_writeto_mem_obj, 1, pyb_i2c_writeto_mem);
STATIC const mp_map_elem_t pyb_i2c_locals_dict_table[] = {
// instance methods
{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&pyb_i2c_init_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&pyb_i2c_deinit_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_scan), (mp_obj_t)&pyb_i2c_scan_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readfrom), (mp_obj_t)&pyb_i2c_readfrom_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readfrom_into), (mp_obj_t)&pyb_i2c_readfrom_into_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_writeto), (mp_obj_t)&pyb_i2c_writeto_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readfrom_mem), (mp_obj_t)&pyb_i2c_readfrom_mem_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readfrom_mem_into), (mp_obj_t)&pyb_i2c_readfrom_mem_into_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_writeto_mem), (mp_obj_t)&pyb_i2c_writeto_mem_obj },
// class constants
{ MP_OBJ_NEW_QSTR(MP_QSTR_MASTER), MP_OBJ_NEW_SMALL_INT(PYBI2C_MASTER) },
};
STATIC MP_DEFINE_CONST_DICT(pyb_i2c_locals_dict, pyb_i2c_locals_dict_table);
const mp_obj_type_t pyb_i2c_type = {
{ &mp_type_type },
.name = MP_QSTR_I2C,
.print = pyb_i2c_print,
.make_new = pyb_i2c_make_new,
.locals_dict = (mp_obj_t)&pyb_i2c_locals_dict,
};
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