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micropython/cc3200/mods/pybi2c.c
Damien George 9d7c53734c cc3200/mods/pybi2c: Make readfnom_mem_into/writeto_mem return None. 
This aligns the I2C class to match the standard machine.I2C API.

Note that this is a (small) breaking change to the existing cc3200 API.
The original API just returned the size of the input buffer so there's no
information lost by this change.  To update scripts users should just use
the size of the buffer passed to these functions to get the number of bytes
that are read/written.
2017-04-18 15:31:08 +10:00

533 lines
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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 "py/runtime.h"
#include "py/mperrno.h"
#include "py/mphal.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_MIN_BAUD_RATE_HZ (50000)
#define PYBI2C_MAX_BAUD_RATE_HZ (400000)
#define PYBI2C_TRANSC_TIMEOUT_MS (20)
#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};
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
STATIC bool pyb_i2c_write(byte addr, byte *data, uint len, bool stop);
/******************************************************************************
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) {
if (timeout < 0) {
// the peripheral is not responding, so stop
return false;
}
// wait for a few microseconds
UtilsDelay(UTILS_DELAY_US_TO_COUNT(PYBI2C_TRANSAC_WAIT_DELAY_US));
timeout -= PYBI2C_TRANSAC_WAIT_DELAY_US;
}
// 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) {
mp_raise_OSError(MP_EPERM);
}
}
STATIC bool pyb_i2c_scan_device(byte devAddr) {
bool ret = false;
// Set the I2C slave address
MAP_I2CMasterSlaveAddrSet(I2CA0_BASE, devAddr, true);
// Initiate the transfer.
if (pyb_i2c_transaction(I2C_MASTER_CMD_SINGLE_RECEIVE)) {
ret = true;
}
// Send the stop bit to cancel the read transaction
MAP_I2CMasterControl(I2CA0_BASE, I2C_MASTER_CMD_BURST_SEND_ERROR_STOP);
if (!ret) {
uint8_t data = 0;
if (pyb_i2c_write(devAddr, &data, sizeof(data), true)) {
ret = true;
}
}
return ret;
}
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)) {
mp_raise_OSError(MP_EIO);
}
}
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)) {
mp_raise_OSError(MP_EIO);
}
} else {
mp_raise_OSError(MP_EIO);
}
}
/******************************************************************************/
/* 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, baudrate=%u)", self->baudrate);
} else {
mp_print_str(print, "I2C(0)");
}
}
STATIC mp_obj_t pyb_i2c_init_helper(pyb_i2c_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_scl, ARG_sda, ARG_freq };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_scl, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_sda, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_freq, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 100000} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// make sure the baudrate is between the valid range
self->baudrate = MIN(MAX(args[ARG_freq].u_int, PYBI2C_MIN_BAUD_RATE_HZ), PYBI2C_MAX_BAUD_RATE_HZ);
// assign the pins
mp_obj_t pins[2] = {&pin_GP13, &pin_GP23}; // default (SDA, SCL) pins
if (args[ARG_scl].u_obj != MP_OBJ_NULL) {
pins[1] = args[ARG_scl].u_obj;
}
if (args[ARG_sda].u_obj != MP_OBJ_NULL) {
pins[0] = args[ARG_sda].u_obj;
}
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;
}
STATIC mp_obj_t pyb_i2c_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
// check the id argument, if given
if (n_args > 0) {
if (all_args[0] != MP_OBJ_NEW_SMALL_INT(0)) {
mp_raise_OSError(MP_ENODEV);
}
--n_args;
++all_args;
}
// parse args
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, all_args + n_args);
// 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, n_args, all_args, &kw_args);
return (mp_obj_t)self;
}
STATIC mp_obj_t pyb_i2c_init(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
return pyb_i2c_init_helper(pos_args[0], n_args - 1, pos_args + 1, kw_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 = 0x08; addr <= 0x77; addr++) {
for (int i = 0; i < 3; 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)) {
mp_raise_OSError(MP_EIO);
}
// 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_const_none;
}
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 mp_const_none;
}
mp_raise_OSError(MP_EIO);
}
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 },
};
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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