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Handle APB frequency change (#2250)

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* Add APB change callbacks and move cpu code to own file

* Properly set esp_timer and FreeRTOS tick dividers

* Improve updated devisors

* No need to update REF_TICK yet

* Add initial handling for UART baud change

* fix uartWriteBuf and uartDetectBaudrate

* trigger callbacks even when APB did not change

* toggle UART ISR on CPU change

* add XTAL freq getter and add cpu freq validation

* Support CPU frequency changes in I2C (#2287)

**esp32-hal-i2c.c**
* add callback for cpu frequency changes
* adjust fifo thresholds based on cpu frequency and i2c bus frequency
* reduce i2c bus frequency if differential is too small
**Wire.h**
* version to 1.1.0

* Implement clock change for the other peripherals

* remove bad CPU clock values from the menu

* Add note to CPU freqs that support WiFi and BT
This commit is contained in:
Me No Dev
2019-01-09 10:07:54 +01:00
committed by GitHub
parent ff18a211e4
commit 2fd39b1aff
13 changed files with 484 additions and 113 deletions
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22
cores/esp32/esp32-hal-sigmadelta.c
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@ -31,6 +31,26 @@
xSemaphoreHandle _sd_sys_lock;
#endif
static void _on_apb_change(void * arg, apb_change_ev_t ev_type, uint32_t old_apb, uint32_t new_apb){
if(old_apb == new_apb){
return;
}
uint32_t iarg = (uint32_t)arg;
uint8_t channel = iarg;
if(ev_type == APB_BEFORE_CHANGE){
SIGMADELTA.cg.clk_en = 0;
} else {
old_apb /= 1000000;
new_apb /= 1000000;
SD_MUTEX_LOCK();
uint32_t old_prescale = SIGMADELTA.channel[channel].prescale + 1;
SIGMADELTA.channel[channel].prescale = ((new_apb * old_prescale) / old_apb) - 1;
SIGMADELTA.cg.clk_en = 0;
SIGMADELTA.cg.clk_en = 1;
SD_MUTEX_UNLOCK();
}
}
uint32_t sigmaDeltaSetup(uint8_t channel, uint32_t freq) //chan 0-7 freq 1220-312500
{
if(channel > 7) {
@ -53,6 +73,8 @@ uint32_t sigmaDeltaSetup(uint8_t channel, uint32_t freq) //chan 0-7 freq 1220-31
SIGMADELTA.cg.clk_en = 0;
SIGMADELTA.cg.clk_en = 1;
SD_MUTEX_UNLOCK();
uint32_t iarg = channel;
addApbChangeCallback((void*)iarg, _on_apb_change);
return apb_freq/((prescale + 1) * 256);
}