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feat(pm): flush UART when enter light sleep

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If FRC2 is not used, pm will not calculate its sleep time.
This commit is contained in:
dongheng
2019-09-06 11:10:18 +08:00
parent df1e032b58
commit 020a17d350
1 changed files with 39 additions and 6 deletions
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45
components/esp8266/source/esp_sleep.c
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@ -28,8 +28,11 @@
#define FRC2_LOAD (0x60000620)
#define FRC2_COUNT (0x60000624)
#define FRC2_CTL (0x60000628)
#define FRC2_ALARM (0x60000630)
#define FRC2_CNTL_ENABLE BIT7
#define FRC2_TICKS_PER_US (5)
#define FRC2_TICKS_MAX (UINT32_MAX / 4)
@ -40,6 +43,8 @@
typedef struct pm_soc_clk {
uint32_t ccount;
uint32_t frc2_enable;
uint32_t frc2_cnt;
} pm_soc_clk_t;
@ -66,7 +71,10 @@ static inline void restore_local_wdev(uint32_t reg)
static inline void save_soc_clk(pm_soc_clk_t *clk)
{
clk->ccount = soc_get_ccount();
clk->frc2_cnt = REG_READ(FRC2_COUNT);
clk->frc2_enable = REG_READ(FRC2_CTL) & FRC2_CNTL_ENABLE;
if (clk->frc2_enable)
clk->frc2_cnt = REG_READ(FRC2_COUNT);
}
static inline uint32_t min_sleep_us(pm_soc_clk_t *clk)
@ -76,22 +84,44 @@ static inline uint32_t min_sleep_us(pm_soc_clk_t *clk)
(os_idle_ticks ? os_idle_ticks - 1 : 0) * portTICK_RATE_MS * 1000;
const uint32_t ccompare_sleep_us = os_sleep_us > 0 ? os_sleep_us : 0;
const uint32_t frc2_sleep_ticks = REG_READ(FRC2_ALARM) - clk->frc2_cnt;
const uint32_t frc2_sleep_us = frc2_sleep_ticks < FRC2_TICKS_MAX ? frc2_sleep_ticks / FRC2_TICKS_PER_US : 0;
if (clk->frc2_enable) {
const uint32_t frc2_sleep_ticks = REG_READ(FRC2_ALARM) - clk->frc2_cnt;
const uint32_t frc2_sleep_us = frc2_sleep_ticks < FRC2_TICKS_MAX ? frc2_sleep_ticks / FRC2_TICKS_PER_US : 0;
return MIN(ccompare_sleep_us, frc2_sleep_us);
return MIN(ccompare_sleep_us, frc2_sleep_us);
} else {
return ccompare_sleep_us;
}
}
static inline void update_soc_clk(pm_soc_clk_t *clk, uint32_t us)
{
const uint32_t os_ccount = us * g_esp_ticks_per_us + clk->ccount;
const uint32_t frc2_cnt = us * FRC2_TICKS_PER_US + clk->frc2_cnt - 1;
if (os_ccount >= _xt_tick_divisor)
soc_set_ccompare(os_ccount + 32);
soc_set_ccount(os_ccount);
REG_WRITE(FRC2_LOAD, frc2_cnt);
if (clk->frc2_enable) {
const uint32_t frc2_cnt = us * FRC2_TICKS_PER_US + clk->frc2_cnt - 1;
REG_WRITE(FRC2_LOAD, frc2_cnt);
}
}
static void esp_sleep_wait_uart_empty(int no)
{
int filled = 0;
const uart_dev_t *uart = (no == 0 ? &uart0 : &uart1);
while (uart->status.txfifo_cnt)
filled = 1;
if (filled) {
const uint32_t us = 10000000 / (UART_CLK_FREQ / uart->clk_div.val);
ets_delay_us(us);
}
}
esp_err_t esp_sleep_enable_timer_wakeup(uint32_t time_in_us)
@ -144,6 +174,9 @@ void esp_sleep_start(void)
return ;
}
esp_sleep_wait_uart_empty(0);
esp_sleep_wait_uart_empty(1);
int slept = 0;
pm_soc_clk_t clk;
const esp_irqflag_t irqflag = soc_save_local_irq();