diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/msp430fr5969lp/driver/i2c.cc | 13 | ||||
| -rw-r--r-- | src/driver/soft_i2c.cc | 8 |
2 files changed, 15 insertions, 6 deletions
diff --git a/src/arch/msp430fr5969lp/driver/i2c.cc b/src/arch/msp430fr5969lp/driver/i2c.cc index f807d00..fe5b37b 100644 --- a/src/arch/msp430fr5969lp/driver/i2c.cc +++ b/src/arch/msp430fr5969lp/driver/i2c.cc @@ -8,16 +8,25 @@ volatile unsigned short old_ifg = 0; +#if (F_CPU / F_I2C) < 45 +inline void await_i2c_int(unsigned int ie_flags, unsigned int ifg_flags) { + while (!(UCB0IFG & ifg_flags)) ; + if (UCB0IFG & (UCNACKIFG | UCCLTOIFG)) { + UCB0IFG &= ~(UCNACKIFG | UCCLTOIFG); + } +} +#else inline void await_i2c_int(unsigned int ie_flags, unsigned int ifg_flags) { UCB0IFG = 0; old_ifg = 0; UCB0IE = ie_flags; - while (!(old_ifg & ifg_flags)) { + do { arch.idle(); - } + } while (!(old_ifg & ifg_flags)); UCB0IE = 0; } +#endif signed char I2C::setup() { diff --git a/src/driver/soft_i2c.cc b/src/driver/soft_i2c.cc index 6c36b6f..76042f2 100644 --- a/src/driver/soft_i2c.cc +++ b/src/driver/soft_i2c.cc @@ -20,10 +20,10 @@ volatile unsigned char timer_done = 0; #define SCL_HIGH gpio.input(scl, 1) #define SCL_LOW gpio.output(scl, 0) #elif SOFTI2C_PULLUP_EXTERNAL -#define SDA_HIGH do { gpio.input(sda); gpio.write(sda_pull, 1); } while (0) -#define SDA_LOW do { gpio.write(sda_pull, 0); gpio.output(sda); } while (0) -#define SCL_HIGH do { gpio.input(scl); gpio.write(scl_pull, 1); } while (0) -#define SCL_LOW do { gpio.write(scl_pull, 0); gpio.output(scl); } while (0) +#define SDA_HIGH { gpio.input(sda); gpio.write(sda_pull, 1); } +#define SDA_LOW { gpio.write(sda_pull, 0); gpio.output(sda); } +#define SCL_HIGH { gpio.input(scl); gpio.write(scl_pull, 1); } +#define SCL_LOW { gpio.write(scl_pull, 0); gpio.output(scl); } #else /* !SOFTI2C_PULLUP_{INTERNAL,EXTERNAL} */ #define SDA_HIGH gpio.input(sda) #define SDA_LOW gpio.output(sda) |