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author | walkerstop <walkerstop@gmail.com> | 2018-05-01 01:00:33 -0700 |
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committer | GitHub <noreply@github.com> | 2018-05-01 01:00:33 -0700 |
commit | 40db44f540436398e0840544044154d13eee63b6 (patch) | |
tree | dad3f1f3b6ac3927484ee22002a947662a8a0173 /os/hal/ports/NRF5/NRF51822/nrf_delay.h | |
parent | 4e9f077fb10255dced1da4d5d2ad9f8ae41442a2 (diff) | |
parent | d4d384557df0e8e7a8071553448b0c42849f98c0 (diff) | |
download | ChibiOS-Contrib-40db44f540436398e0840544044154d13eee63b6.tar.gz ChibiOS-Contrib-40db44f540436398e0840544044154d13eee63b6.tar.bz2 ChibiOS-Contrib-40db44f540436398e0840544044154d13eee63b6.zip |
Merge branch 'master' into master
Diffstat (limited to 'os/hal/ports/NRF5/NRF51822/nrf_delay.h')
-rw-r--r-- | os/hal/ports/NRF5/NRF51822/nrf_delay.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/os/hal/ports/NRF5/NRF51822/nrf_delay.h b/os/hal/ports/NRF5/NRF51822/nrf_delay.h new file mode 100644 index 0000000..f8668d6 --- /dev/null +++ b/os/hal/ports/NRF5/NRF51822/nrf_delay.h @@ -0,0 +1,51 @@ +/* + Copyright (C) 2015 Stephen Caudle + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +/** + * @file NRF5/NRF51822/nrf_delay.h + * @brief NRF5 Delay routines + * + * @{ + */ + +#ifndef _NRF_DELAY_H +#define _NRF_DELAY_H + +inline static void nrf_delay_us(uint32_t volatile number_of_us) __attribute__((always_inline)); +inline static void nrf_delay_us(uint32_t volatile number_of_us) +{ +register uint32_t delay __asm ("r0") = number_of_us; +__asm volatile ( +".syntax unified\n" + "1:\n" + " SUBS %0, %0, #1\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " NOP\n" + " BNE 1b\n" + ".syntax divided\n" + : "+r" (delay)); +} +#endif //__NRF_DELAY_H |