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micropython
Commit 4054c4ea authored by Daniel Campora's avatar Daniel Campora
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cc3200: Remove I2C inline documentation (sphinx is on the lead).

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cc3200/mods/pybi2c.c
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......@@ -47,47 +47,6 @@
/// \moduleref pyb
/// \class I2C - a two-wire serial protocol
///
/// I2C is a two-wire protocol for communicating between devices. At the physical
/// level it consists of 2 wires: SCL and SDA, the clock and data lines respectively.
///
/// I2C objects are created attached to a specific bus. They can be initialised
/// when created, or initialised later on:
///
/// from pyb import I2C
///
/// i2c = I2C(1) # create
/// i2c = I2C(1, I2C.MASTER, baudrate=50000) # create and init with a 50KHz baudrate
/// i2c.init(I2C.MASTER, baudrate=100000) # init with a 100KHz baudrate
/// i2c.deinit() # turn off the peripheral
///
/// Printing the i2c object gives you information about its configuration.
///
/// Basic methods for slave are send and recv:
///
/// i2c.send('abc') # send 3 bytes
/// i2c.send(0x42) # send a single byte, given by the number
/// data = i2c.recv(3) # receive 3 bytes
///
/// To receive inplace, first create a bytearray:
///
/// data = bytearray(3) # create a buffer
/// i2c.recv(data) # receive 3 bytes, writing them into data
///
/// A master must specify the recipient's address:
///
/// i2c.send('123', 0x42) # send 3 bytes to slave with address 0x42
/// i2c.send(b'456', addr=0x42) # keyword for address
///
/// Master also has other methods:
///
/// i2c.is_ready(0x42) # check if slave 0x42 is ready
/// i2c.scan() # scan for slaves on the bus, returning
/// # a list of valid addresses
/// i2c.mem_read(3, 0x42, 2) # read 3 bytes from memory of slave 0x42,
/// # starting at address 2 in the slave
/// i2c.mem_write('abc', 0x42, 2) # write 3 bytes to memory of slave 0x42,
/// # starting at address 2 in the slave
typedef struct _pyb_i2c_obj_t {
mp_obj_base_t base;
......@@ -262,12 +221,7 @@ STATIC void pyb_i2c_print(const mp_print_t *print, mp_obj_t self_in, mp_print_ki
}
}
/// \method init(mode, *, baudrate=100000)
///
/// Initialise the I2C bus with the given parameters:
///
/// - `mode` must be either `I2C.MASTER` or `I2C.SLAVE`
/// - `baudrate` is the SCL clock rate (only sensible for a master)
/// \method init()
STATIC const mp_arg_t pyb_i2c_init_args[] = {
{ MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_INT, },
{ MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 100000} },
......@@ -297,12 +251,6 @@ STATIC mp_obj_t pyb_i2c_init_helper(pyb_i2c_obj_t *self, mp_uint_t n_args, const
}
/// \classmethod \constructor(bus, ...)
///
/// Construct an I2C object on the given bus. `bus` can only be 1.
/// With no additional parameters, the I2C object is created but not
/// initialised (it has the settings from the last initialisation of
/// the bus, if any). If extra arguments are given, the bus is initialised.
/// See `init` for parameters of initialisation.
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 *args) {
// check arguments
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
......@@ -311,6 +259,11 @@ STATIC mp_obj_t pyb_i2c_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n
pyb_i2c_obj_t *self = &pyb_i2c_obj;
self->base.type = &pyb_i2c_type;
// check the peripheral id
if (mp_obj_get_int(args[0]) != 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_resource_not_avaliable));
}
if (n_args > 1 || n_kw > 0) {
// start the peripheral
mp_map_t kw_args;
......@@ -327,7 +280,6 @@ STATIC mp_obj_t pyb_i2c_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *k
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_init_obj, 1, pyb_i2c_init);
/// \method deinit()
/// Turn off the I2C bus.
STATIC mp_obj_t pyb_i2c_deinit(mp_obj_t self_in) {
// disable the peripheral
MAP_I2CMasterDisable(I2CA0_BASE);
......@@ -341,7 +293,6 @@ STATIC mp_obj_t pyb_i2c_deinit(mp_obj_t self_in) {
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_i2c_deinit_obj, pyb_i2c_deinit);
/// \method is_ready(addr)
/// Check if an I2C device responds to the given address. Only valid when in master mode.
STATIC mp_obj_t pyb_i2c_is_ready(mp_obj_t self_in, mp_obj_t i2c_addr_o) {
mp_uint_t i2c_addr = mp_obj_get_int(i2c_addr_o);
for (int i = 0; i < 7; i++) {
......@@ -354,8 +305,6 @@ STATIC mp_obj_t pyb_i2c_is_ready(mp_obj_t self_in, mp_obj_t i2c_addr_o) {
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_i2c_is_ready_obj, pyb_i2c_is_ready);
/// \method scan()
/// Scan all I2C addresses from 0x01 to 0x7f and return a list of those that respond.
/// Only valid when in master mode.
STATIC mp_obj_t pyb_i2c_scan(mp_obj_t self_in) {
mp_obj_t list = mp_obj_new_list(0, NULL);
for (uint addr = 1; addr <= 127; addr++) {
......@@ -366,17 +315,11 @@ STATIC mp_obj_t pyb_i2c_scan(mp_obj_t self_in) {
}
}
}
return list;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_i2c_scan_obj, pyb_i2c_scan);
/// \method send(send, addr=0x00)
/// Send data on the bus:
///
/// - `send` is the data to send (an integer to send, or a buffer object)
/// - `addr` is the address to send to (only required in master mode)
/// Return value: `None`.
/// \method send()
STATIC const mp_arg_t pyb_i2c_send_args[] = {
{ MP_QSTR_send, MP_ARG_REQUIRED | MP_ARG_OBJ, },
{ MP_QSTR_addr, MP_ARG_INT, {.u_int = 0} },
......@@ -403,16 +346,7 @@ STATIC mp_obj_t pyb_i2c_send(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *k
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_send_obj, 1, pyb_i2c_send);
/// \method recv(recv, addr=0x00)
///
/// Receive data on the bus:
///
/// - `recv` can be an integer, which is the number of bytes to receive,
/// or a mutable buffer, which will be filled with received bytes
/// - `addr` is the address to receive from (only required in master mode)
///
/// Return value: if `recv` is an integer then a new buffer of the bytes received,
/// otherwise the same buffer that was passed in to `recv`.
/// \method recv()
STATIC const mp_arg_t pyb_i2c_recv_args[] = {
{ MP_QSTR_recv, MP_ARG_REQUIRED | MP_ARG_OBJ, },
{ MP_QSTR_addr, MP_ARG_INT, {.u_int = 0} },
......@@ -444,17 +378,7 @@ STATIC mp_obj_t pyb_i2c_recv(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *k
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_recv_obj, 1, pyb_i2c_recv);
/// \method mem_read(data, addr, memaddr, addr_size=8)
///
/// Read from the memory of an I2C device:
///
/// - `data` can be an integer or a buffer to read into
/// - `addr` is the I2C device address
/// - `memaddr` is the memory location within the I2C device
/// - `addr_size` selects the width of memaddr: 8 or 16 bits
///
/// Returns the read data.
/// This is only valid in master mode.
/// \method mem_read()
STATIC const mp_arg_t pyb_i2c_mem_read_args[] = {
{ MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ, },
{ MP_QSTR_addr, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 0} },
......@@ -498,17 +422,7 @@ STATIC mp_obj_t pyb_i2c_mem_read(mp_uint_t n_args, const mp_obj_t *args, mp_map_
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_mem_read_obj, 1, pyb_i2c_mem_read);
/// \method mem_write(data, addr, memaddr, addr_size=8)
///
/// Write to the memory of an I2C device:
///
/// - `data` can be an integer or a buffer to write from
/// - `addr` is the I2C device address
/// - `memaddr` is the memory location within the I2C device
/// - `addr_size` selects the width of memaddr: 8 or 16 bits
///
/// Returns `None`.
/// This is only valid in master mode.
/// \method mem_write()
STATIC mp_obj_t pyb_i2c_mem_write(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
// parse args (same as mem_read)
mp_arg_val_t vals[PYB_I2C_MEM_READ_NUM_ARGS];
......
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