8000 rp2/rp2_flash.c: Disable IRQs before calling flash_erase/program. by iabdalkader · Pull Request #7683 · micropython/micropython · GitHub
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rp2/rp2_flash.c: Disable IRQs before calling flash_erase/program. #7683

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rp2/rp2_flash.c: Disable IRQs before calling flash_erase/program. #7683

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11 changes: 11 additions & 0 deletions ports/rp2/rp2_flash.c
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Original file line number Diff line number Diff line change
Expand Up @@ -95,12 +95,20 @@ STATIC mp_obj_t rp2_flash_writeblocks(size_t n_args, const mp_obj_t *args) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_READ);
if (n_args == 3) {
// Flash erase/program must run in an atomic section because the XIP bit gets disabled.
mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION();
flash_range_erase(self->flash_base + offset, bufinfo.len);
MICROPY_END_ATOMIC_SECTION(atomic_state);
MICROPY_EVENT_POLL_HOOK
// TODO check return value
} else {
offset += mp_obj_get_int(args[3]);
}
// Flash erase/program must run in an atomic section because the XIP bit gets disabled.
mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION();
flash_range_program(self->flash_base + offset, bufinfo.buf, bufinfo.len);
MICROPY_END_ATOMIC_SECTION(atomic_state);
MICROPY_EVENT_POLL_HOOK
// TODO check return value
return mp_const_none;
}
Expand All @@ -122,7 +130,10 @@ STATIC mp_obj_t rp2_flash_ioctl(mp_obj_t self_in, mp_obj_t cmd_in, mp_obj_t arg_
return MP_OBJ_NEW_SMALL_INT(BLOCK_SIZE_BYTES);
case MP_BLOCKDEV_IOCTL_BLOCK_ERASE: {
uint32_t offset = mp_obj_get_int(arg_in) * BLOCK_SIZE_BYTES;
// Flash erase/program must run in an atomic section because the XIP bit gets disabled.
mp_uint_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION();
flash_range_erase(self->flash_base + offset, BLOCK_SIZE_BYTES);
MICROPY_END_ATOMIC_SECTION(atomic_state);
// TODO check return value
return MP_OBJ_NEW_SMALL_INT(0);
}
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