R1 code for micro:bit based train controller code, requires second micro:bit running tx code to operate - see https://meanderingpi.wordpress.com/ for more information
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Diff: TARGET_NRF51_MICROBIT/nrf_delay.h
- Revision:
- 0:e1a608bb55e8
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TARGET_NRF51_MICROBIT/nrf_delay.h Thu Apr 07 18:33:58 2016 +0100 @@ -0,0 +1,74 @@ +#ifndef _NRF_DELAY_H +#define _NRF_DELAY_H + +// #include "nrf.h" + +/*lint --e{438, 522} "Variable not used" "Function lacks side-effects" */ +#if defined ( __CC_ARM ) +static __ASM void __INLINE nrf_delay_us(uint32_t volatile number_of_us) +{ +loop + SUBS R0, R0, #1 + NOP + NOP + NOP + NOP + NOP + NOP + NOP + NOP + NOP + NOP + NOP + NOP + BNE loop + BX LR +} +#elif defined ( __ICCARM__ ) +static void __INLINE nrf_delay_us(uint32_t volatile number_of_us) +{ +__ASM ( +"loop:\n\t" + " SUBS R0, R0, #1\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " NOP\n\t" + " BNE loop\n\t"); +} +#elif defined ( __GNUC__ ) +__INLINE static void nrf_delay_us(uint32_t volatile number_of_us) +{ + do + { + __ASM volatile ( + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + "NOP\n\t" + ); + } while (--number_of_us); +} +#endif + +void nrf_delay_ms(uint32_t volatile number_of_ms); + +#endif