diff options
| author | Keith Packard <keithp@keithp.com> | 2019-07-16 11:10:36 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2019-07-16 11:10:36 -0700 |
| commit | c37cd66b7c11f904b528c5ff7e80e18c5e0d26e5 (patch) | |
| tree | ae69d02e2371648be7944d9e599b3fef116295eb /src/micropeak-v2.0/ao_pins.h | |
| parent | 40624256be70088d7608742b71e1241d95a7fcdf (diff) | |
altos/micropeak-v2.0: Reduce power usage
This gets power consumption down under 1mA on the pad. Not really low
enough to sell, but I think this is about as low as the chip will go.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/micropeak-v2.0/ao_pins.h')
| -rw-r--r-- | src/micropeak-v2.0/ao_pins.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/micropeak-v2.0/ao_pins.h b/src/micropeak-v2.0/ao_pins.h index 9dba26bd..d3bd2281 100644 --- a/src/micropeak-v2.0/ao_pins.h +++ b/src/micropeak-v2.0/ao_pins.h @@ -43,8 +43,8 @@ extern uint8_t ao_on_battery; #define AO_RCC_CFGR_HPRE_DIV (ao_on_battery ? STM_RCC_CFGR_HPRE_DIV_16 : STM_RCC_CFGR_HPRE_DIV_1) /* APB = 12MHz usb / 2MHz battery */ -#define AO_APB_PRESCALER 1 -#define AO_RCC_CFGR_PPRE_DIV STM_RCC_CFGR_PPRE_DIV_1 +#define AO_APB_PRESCALER (ao_on_battery ? 2 : 1) +#define AO_RCC_CFGR_PPRE_DIV (ao_on_battery ? STM_RCC_CFGR_PPRE_DIV_2 : STM_RCC_CFGR_PPRE_DIV_1) #define HAS_USB 1 #define AO_PA11_PA12_RMP 1 @@ -86,6 +86,7 @@ extern uint8_t ao_on_battery; /* SPI */ #define HAS_SPI_1 1 +#define SPI_1_POWER_MANAGE 1 #define SPI_1_PA5_PA6_PA7 1 #define SPI_1_PB3_PB4_PB5 0 #define SPI_1_OSPEEDR STM_OSPEEDR_MEDIUM @@ -128,9 +129,11 @@ void ao_delay_until(uint16_t target); #define ao_async_stop() do { \ ao_serial2_drain(); \ stm_moder_set(&stm_gpioa, 2, STM_MODER_OUTPUT); \ + ao_serial_shutdown(); \ } while (0) #define ao_async_start() do { \ + ao_serial_init(); \ stm_moder_set(&stm_gpioa, 2, STM_MODER_ALTERNATE); \ ao_delay(AO_MS_TO_TICKS(100)); \ } while (0) |