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Save flash space

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* No weak link for modules. It only impacts _os and _time and is
  already disabled for non-full builds.
* Turn off PA00 and PA01 because they are the crystal on the Metro
  M0 Express.
* Change ejected default to false to move it to BSS. It is set on
  USB connection anyway.
* Set sinc_filter to const. Doesn't help flash but keeps it out of
  RAM.
This commit is contained in:
Scott Shawcroft 2020-11-13 18:33:02 -08:00
parent 68eb809fbf
commit bda3267432
No known key found for this signature in database
GPG Key ID: 0DFD512649C052DA
4 changed files with 7 additions and 3 deletions
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4
ports/atmel-samd/boards/metro_m0_express/mpconfigboard.h
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@ -33,6 +33,10 @@
#define DEFAULT_UART_BUS_RX (&pin_PA11)
#define DEFAULT_UART_BUS_TX (&pin_PA10)
// These pins are connected to the external crystal.
#define IGNORE_PIN_PA00 1
#define IGNORE_PIN_PA01 1
// USB is always used internally so skip the pin objects for it.
#define IGNORE_PIN_PA24 1
#define IGNORE_PIN_PA25 1

2
ports/atmel-samd/common-hal/audiobusio/PDMIn.c
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@ -326,7 +326,7 @@ static void setup_dma(audiobusio_pdmin_obj_t* self, uint32_t length,
// higher sample rate than specified. Then after the audio is
// recorded, a more expensive filter non-real-time filter could be
// used to down-sample and low-pass.
uint16_t sinc_filter [OVERSAMPLING] = {
const uint16_t sinc_filter [OVERSAMPLING] = {
0, 2, 9, 21, 39, 63, 94, 132,
179, 236, 302, 379, 467, 565, 674, 792,
920, 1055, 1196, 1341, 1487, 1633, 1776, 1913,

2
py/circuitpy_mpconfig.h
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@ -186,7 +186,7 @@ typedef long mp_off_t;
#define MICROPY_CPYTHON_COMPAT (CIRCUITPY_FULL_BUILD)
#define MICROPY_PY_BUILTINS_POW3 (CIRCUITPY_FULL_BUILD)
#define MICROPY_COMP_FSTRING_LITERAL (MICROPY_CPYTHON_COMPAT)
#define MICROPY_MODULE_WEAK_LINKS (CIRCUITPY_FULL_BUILD)
#define MICROPY_MODULE_WEAK_LINKS (0)
#define MICROPY_PY_ALL_SPECIAL_METHODS (CIRCUITPY_FULL_BUILD)
#define MICROPY_PY_BUILTINS_COMPLEX (CIRCUITPY_FULL_BUILD)
#define MICROPY_PY_BUILTINS_FROZENSET (CIRCUITPY_FULL_BUILD)

2
supervisor/shared/usb/usb_msc_flash.c
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@ -39,7 +39,7 @@
#define MSC_FLASH_BLOCK_SIZE 512
static bool ejected[1] = {true};
static bool ejected[1] = {false};
void usb_msc_mount(void) {
// Reset the ejection tracking every time we're plugged into USB. This allows for us to battery