Simple start analog wathdog

Add 900kHz i2c setting

adc.c

@@ -108,14 +108,14 @@ int16_t adc_vbat_read(void)
   return vbat_raw + config.vbat_offset;
 }
 
-void adc_start_analog_watchdogd(uint32_t chsel)
+void adc_start_analog_watchdogd(void)
 {
   // ADC setup, if it is defined a callback for the analog watch dog then it is enabled.
   VNA_ADC->ISR    = VNA_ADC->ISR;
   VNA_ADC->IER    = ADC_IER_AWDIE;
   VNA_ADC->TR     = ADC_TR(0, TOUCH_THRESHOLD);
   VNA_ADC->SMPR   = ADC_SMPR_SMP_1P5;
-  VNA_ADC->CHSELR = chsel;
+  VNA_ADC->CHSELR = ADC_TOUCH_Y;
 
   /* ADC configuration and start.*/
   VNA_ADC->CFGR1  = ADC_CFGR1_RES_12BIT | ADC_CFGR1_AWDEN

main.c

@@ -2549,6 +2549,10 @@ static const I2CConfig i2ccfg = {
   STM32_TIMINGR_PRESC(0U)  |
   STM32_TIMINGR_SCLDEL(10U) | STM32_TIMINGR_SDADEL(10U) |
   STM32_TIMINGR_SCLH(30U)   | STM32_TIMINGR_SCLL(50U),
+  // 900kHz @ SYSCLK 48MHz, manually get values, x2 I2C speed
+//  STM32_TIMINGR_PRESC(0U)  |
+//  STM32_TIMINGR_SCLDEL(10U) | STM32_TIMINGR_SDADEL(10U) |
+//  STM32_TIMINGR_SCLH(23U)   | STM32_TIMINGR_SCLL(30U),
 #else
 #error "Need Define STM32_I2C1SW and set correct TIMINGR settings"
 #endif

nanovna.h

@@ -646,7 +646,7 @@ void enter_dfu(void);
 
 void adc_init(void);
 uint16_t adc_single_read(uint32_t chsel);
-void adc_start_analog_watchdogd(uint32_t chsel);
+void adc_start_analog_watchdogd(void);
 void adc_stop(void);
 int16_t adc_vbat_read(void);
 

ui.c

@@ -338,7 +338,7 @@ void
 touch_start_watchdog(void)
 {
   touch_prepare_sense();
-  adc_start_analog_watchdogd(ADC_TOUCH_Y);
+  adc_start_analog_watchdogd();
 }
 
 static inline int