Merge tag 'v1.9.1'2.0.0-alpha.0

Fixes for stmhal USB mass storage, lwIP bindings and VFS regressions

This release provides an important fix for the USB mass storage device in
the stmhal port by implementing the SCSI SYNCHRONIZE_CACHE command, which
is now require by some Operating Systems.  There are also fixes for the
lwIP bindings to improve non-blocking sockets and error codes.  The VFS has
some regressions fixed including the ability to statvfs the root.

All changes are listed below.

py core:
- modbuiltins: add core-provided version of input() function
- objstr: catch case of negative "maxsplit" arg to str.rsplit()
- persistentcode: allow to compile with complex numbers disabled
- objstr: allow to compile with obj-repr D, and unicode disabled
- modsys: allow to compile with obj-repr D and PY_ATTRTUPLE disabled
- provide mp_decode_uint_skip() to help reduce stack usage
- makeqstrdefs.py: make script run correctly with Python 2.6
- objstringio: if created from immutable object, follow copy on write policy

extmod:
- modlwip: connect: for non-blocking mode, return EINPROGRESS
- modlwip: fix error codes for duplicate calls to connect()
- modlwip: accept: fix error code for non-blocking mode
- vfs: allow to statvfs the root directory
- vfs: allow "buffering" and "encoding" args to VFS's open()
- modframebuf: fix signed/unsigned comparison pendantic warning

lib:
- libm: use isfinite instead of finitef, for C99 compatibility
- utils/interrupt_char: remove support for KBD_EXCEPTION disabled

tests:
- basics/string_rsplit: add tests for negative "maxsplit" argument
- float: convert "sys.exit()" to "raise SystemExit"
- float/builtin_float_minmax: PEP8 fixes
- basics: convert "sys.exit()" to "raise SystemExit"
- convert remaining "sys.exit()" to "raise SystemExit"

unix port:
- convert to use core-provided version of built-in import()
- Makefile: replace references to make with $(MAKE)

windows port:
- convert to use core-provided version of built-in import()

qemu-arm port:
- Makefile: adjust object-file lists to get correct dependencies
- enable micropython.mem_*() functions to allow more tests

stmhal port:
- boards: enable DAC for NUCLEO_F767ZI board
- add support for NUCLEO_F446RE board
- pass USB handler as parameter to allow more than one USB handler
- usb: use local USB handler variable in Start-of-Frame handler
- usb: make state for USB device private to top-level USB driver
- usbdev: for MSC implement SCSI SYNCHRONIZE_CACHE command
- convert from using stmhal's input() to core provided version

cc3200 port:
- convert from using stmhal's input() to core provided version

teensy port:
- convert from using stmhal's input() to core provided version

esp8266 port:
- Makefile: replace references to make with $(MAKE)
- Makefile: add clean-modules target
- convert from using stmhal's input() to core provided version

zephyr port:
- modusocket: getaddrinfo: Fix mp_obj_len() usage
- define MICROPY_PY_SYS_PLATFORM (to "zephyr")
- machine_pin: use native Zephyr types for Zephyr API calls

docs:
- machine.Pin: remove out_value() method
- machine.Pin: add on() and off() methods
- esp8266: consistently replace Pin.high/low methods with .on/off
- esp8266/quickref: polish Pin.on()/off() examples
- network: move confusingly-named cc3200 Server class to its reference
- uos: deconditionalize, remove minor port-specific details
- uos: move cc3200 port legacy VFS mounting functions to its ref doc
- machine: sort machine classes in logical order, not alphabetically
- network: first step to describe standard network class interface

examples:
- embedding: use core-provided KeyboardInterrupt object

1 files changed, 32 insertions, 24 deletions

diff --git a/stmhal/spi.c b/stmhal/spi.c
index 234d4bab7..eb7edbea0 100644
--- a/stmhal/spi.c
+++ b/stmhal/spi.c
@@ -403,6 +403,11 @@ STATIC HAL_StatusTypeDef spi_wait_dma_finished(SPI_HandleTypeDef *spi, uint32_t
     return HAL_OK;
 }
 
+// A transfer of "len" bytes should take len*8*1000/baudrate milliseconds.
+// To simplify the calculation we assume the baudrate is never less than 8kHz
+// and use that value for the baudrate in the formula, plus a small constant.
+#define SPI_TRANSFER_TIMEOUT(len) ((len) + 100)
+
 STATIC void spi_transfer(const pyb_spi_obj_t *self, size_t len, const uint8_t *src, uint8_t *dest, uint32_t timeout) {
     // Note: there seems to be a problem sending 1 byte using DMA the first
     // time directly after the SPI/DMA is initialised.  The cause of this is
@@ -419,6 +424,7 @@ STATIC void spi_transfer(const pyb_spi_obj_t *self, size_t len, const uint8_t *s
             dma_init(&tx_dma, self->tx_dma_descr, self->spi);
             self->spi->hdmatx = &tx_dma;
             self->spi->hdmarx = NULL;
+            MP_HAL_CLEAN_DCACHE(src, len);
             status = HAL_SPI_Transmit_DMA(self->spi, (uint8_t*)src, len);
             if (status == HAL_OK) {
                 status = spi_wait_dma_finished(self->spi, timeout);
@@ -440,7 +446,7 @@ STATIC void spi_transfer(const pyb_spi_obj_t *self, size_t len, const uint8_t *s
             }
             dma_init(&rx_dma, self->rx_dma_descr, self->spi);
             self->spi->hdmarx = &rx_dma;
-
+            MP_HAL_CLEANINVALIDATE_DCACHE(dest, len);
             status = HAL_SPI_Receive_DMA(self->spi, dest, len);
             if (status == HAL_OK) {
                 status = spi_wait_dma_finished(self->spi, timeout);
@@ -460,6 +466,8 @@ STATIC void spi_transfer(const pyb_spi_obj_t *self, size_t len, const uint8_t *s
             self->spi->hdmatx = &tx_dma;
             dma_init(&rx_dma, self->rx_dma_descr, self->spi);
             self->spi->hdmarx = &rx_dma;
+            MP_HAL_CLEAN_DCACHE(src, len);
+            MP_HAL_CLEANINVALIDATE_DCACHE(dest, len);
             status = HAL_SPI_TransmitReceive_DMA(self->spi, (uint8_t*)src, dest, len);
             if (status == HAL_OK) {
                 status = spi_wait_dma_finished(self->spi, timeout);
@@ -775,44 +783,44 @@ STATIC mp_obj_t pyb_spi_send_recv(mp_uint_t n_args, const mp_obj_t *pos_args, mp
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_spi_send_recv_obj, 1, pyb_spi_send_recv);
 
-STATIC const mp_map_elem_t pyb_spi_locals_dict_table[] = {
+STATIC const mp_rom_map_elem_t pyb_spi_locals_dict_table[] = {
     // instance methods
-    { MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&pyb_spi_init_obj },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&pyb_spi_deinit_obj },
+    { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&pyb_spi_init_obj) },
+    { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&pyb_spi_deinit_obj) },
 
-    { MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_machine_spi_read_obj },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_readinto), (mp_obj_t)&mp_machine_spi_readinto_obj },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&mp_machine_spi_write_obj },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_write_readinto), (mp_obj_t)&mp_machine_spi_write_readinto_obj },
+    { MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_machine_spi_read_obj) },
+    { MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_machine_spi_readinto_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_machine_spi_write_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write_readinto), MP_ROM_PTR(&mp_machine_spi_write_readinto_obj) },
 
     // legacy methods
-    { MP_OBJ_NEW_QSTR(MP_QSTR_send), (mp_obj_t)&pyb_spi_send_obj },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_recv), (mp_obj_t)&pyb_spi_recv_obj },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_send_recv), (mp_obj_t)&pyb_spi_send_recv_obj },
+    { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&pyb_spi_send_obj) },
+    { MP_ROM_QSTR(MP_QSTR_recv), MP_ROM_PTR(&pyb_spi_recv_obj) },
+    { MP_ROM_QSTR(MP_QSTR_send_recv), MP_ROM_PTR(&pyb_spi_send_recv_obj) },
 
     // class constants
     /// \constant MASTER - for initialising the bus to master mode
     /// \constant SLAVE - for initialising the bus to slave mode
     /// \constant MSB - set the first bit to MSB
     /// \constant LSB - set the first bit to LSB
-    { MP_OBJ_NEW_QSTR(MP_QSTR_MASTER), MP_OBJ_NEW_SMALL_INT(SPI_MODE_MASTER) },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_SLAVE),  MP_OBJ_NEW_SMALL_INT(SPI_MODE_SLAVE) },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_MSB),    MP_OBJ_NEW_SMALL_INT(SPI_FIRSTBIT_MSB) },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_LSB),    MP_OBJ_NEW_SMALL_INT(SPI_FIRSTBIT_LSB) },
+    { MP_ROM_QSTR(MP_QSTR_MASTER), MP_ROM_INT(SPI_MODE_MASTER) },
+    { MP_ROM_QSTR(MP_QSTR_SLAVE),  MP_ROM_INT(SPI_MODE_SLAVE) },
+    { MP_ROM_QSTR(MP_QSTR_MSB),    MP_ROM_INT(SPI_FIRSTBIT_MSB) },
+    { MP_ROM_QSTR(MP_QSTR_LSB),    MP_ROM_INT(SPI_FIRSTBIT_LSB) },
     /* TODO
-    { MP_OBJ_NEW_QSTR(MP_QSTR_DIRECTION_2LINES             ((uint32_t)0x00000000)
-    { MP_OBJ_NEW_QSTR(MP_QSTR_DIRECTION_2LINES_RXONLY      SPI_CR1_RXONLY
-    { MP_OBJ_NEW_QSTR(MP_QSTR_DIRECTION_1LINE              SPI_CR1_BIDIMODE
-    { MP_OBJ_NEW_QSTR(MP_QSTR_NSS_SOFT                    SPI_CR1_SSM
-    { MP_OBJ_NEW_QSTR(MP_QSTR_NSS_HARD_INPUT              ((uint32_t)0x00000000)
-    { MP_OBJ_NEW_QSTR(MP_QSTR_NSS_HARD_OUTPUT             ((uint32_t)0x00040000)
+    { MP_ROM_QSTR(MP_QSTR_DIRECTION_2LINES             ((uint32_t)0x00000000)
+    { MP_ROM_QSTR(MP_QSTR_DIRECTION_2LINES_RXONLY      SPI_CR1_RXONLY
+    { MP_ROM_QSTR(MP_QSTR_DIRECTION_1LINE              SPI_CR1_BIDIMODE
+    { MP_ROM_QSTR(MP_QSTR_NSS_SOFT                    SPI_CR1_SSM
+    { MP_ROM_QSTR(MP_QSTR_NSS_HARD_INPUT              ((uint32_t)0x00000000)
+    { MP_ROM_QSTR(MP_QSTR_NSS_HARD_OUTPUT             ((uint32_t)0x00040000)
     */
 };
 
 STATIC MP_DEFINE_CONST_DICT(pyb_spi_locals_dict, pyb_spi_locals_dict_table);
 
 STATIC void spi_transfer_machine(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) {
-    spi_transfer((pyb_spi_obj_t*)self_in, len, src, dest, 100);
+    spi_transfer((pyb_spi_obj_t*)self_in, len, src, dest, SPI_TRANSFER_TIMEOUT(len));
 }
 
 STATIC const mp_machine_spi_p_t pyb_spi_p = {
@@ -825,7 +833,7 @@ const mp_obj_type_t pyb_spi_type = {
     .print = pyb_spi_print,
     .make_new = pyb_spi_make_new,
     .protocol = &pyb_spi_p,
-    .locals_dict = (mp_obj_t)&pyb_spi_locals_dict,
+    .locals_dict = (mp_obj_dict_t*)&pyb_spi_locals_dict,
 };
 
 /******************************************************************************/
@@ -929,7 +937,7 @@ STATIC void machine_hard_spi_deinit(mp_obj_base_t *self_in) {
 
 STATIC void machine_hard_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) {
     machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t*)self_in;
-    spi_transfer(self->pyb, len, src, dest, 100);
+    spi_transfer(self->pyb, len, src, dest, SPI_TRANSFER_TIMEOUT(len));
 }
 
 STATIC const mp_machine_spi_p_t machine_hard_spi_p = {