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 | |
| 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>
| -rw-r--r-- | src/micropeak-v2.0/ao_micropeak.c | 10 | ||||
| -rw-r--r-- | src/micropeak-v2.0/ao_pins.h | 7 |
2 files changed, 11 insertions, 6 deletions
diff --git a/src/micropeak-v2.0/ao_micropeak.c b/src/micropeak-v2.0/ao_micropeak.c index 0b9972e9..1bf0999e 100644 --- a/src/micropeak-v2.0/ao_micropeak.c +++ b/src/micropeak-v2.0/ao_micropeak.c @@ -272,9 +272,6 @@ ao_hsi_init(void) /* Enable prefetch */ stm_flash.acr |= (1 << STM_FLASH_ACR_PRFTBE); - /* Enable power interface clock */ - stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_PWREN); - /* HCLK to 48MHz -> AHB prescaler = /1 */ cfgr = stm_rcc.cfgr; cfgr &= ~(STM_RCC_CFGR_HPRE_MASK << STM_RCC_CFGR_HPRE); @@ -314,7 +311,6 @@ main(void) ao_led_init(); ao_task_init(); ao_timer_init(); - ao_serial_init(); stm_moder_set(&stm_gpioa, 2, STM_MODER_OUTPUT); ao_dma_init(); ao_spi_init(); @@ -325,6 +321,12 @@ main(void) ao_ms5607_init(); ao_storage_init(); + /* Let FLITF clock turn off in sleep mode */ + stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_FLITFEN); + + /* Le SRAM clock turn off in sleep mode */ + stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_SRAMEN); + if (ao_on_battery) { /* On battery power, run the flight code */ ao_add_task(&mp_task, ao_micropeak, "micropeak"); 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) |