diff options
| author | Damien George <damien.p.george@gmail.com> | 2014-03-08 15:17:10 +0000 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2014-03-08 15:17:10 +0000 |
| commit | 360b25ab0f8df087d6ad986e4cd6fa2cff1d256b (patch) | |
| tree | 48b370cdbe97a783feb8c44cb9e859aa304c0a5f /stm/main.c | |
| parent | cd000645f82a356c35139a8d28781a86c473e4f0 (diff) | |
stm: Add udelay (delay in microseconds).
Diffstat (limited to 'stm/main.c')
| -rw-r--r-- | stm/main.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/stm/main.c b/stm/main.c index 9f4fec84d..e5f5d4e76 100644 --- a/stm/main.c +++ b/stm/main.c @@ -110,6 +110,16 @@ mp_obj_t pyb_delay(mp_obj_t count) { return mp_const_none; } +mp_obj_t pyb_udelay(mp_obj_t usec) { + uint32_t count = 0; + const uint32_t utime = (168 * mp_obj_get_int(usec) / 5); + for (;;) { + if (++count > utime) { + return mp_const_none; + } + } +} + void fatality(void) { led_state(PYB_LED_R1, 1); led_state(PYB_LED_G1, 1); @@ -415,6 +425,7 @@ soft_reset: rt_store_attr(m, MP_QSTR_main, rt_make_function_n(1, pyb_main)); rt_store_attr(m, MP_QSTR_sync, rt_make_function_n(0, pyb_sync)); rt_store_attr(m, MP_QSTR_delay, rt_make_function_n(1, pyb_delay)); + rt_store_attr(m, MP_QSTR_udelay, rt_make_function_n(1, pyb_udelay)); #if MICROPY_HW_HAS_SWITCH rt_store_attr(m, MP_QSTR_switch, (mp_obj_t)&pyb_switch_obj); #endif |