piezo power on 이전에 maa busy flag 먼저 세트

- piezo power on delay 10ms 존재
- Piezo 측정 중에는 배터리/온도 저전압 체크가 동작하지 않도록 하기 위함

project/ble_peripheral/ble_app_bladder_patch/measurement/adc121s051/dr_adc121s051.c

@@ -53,7 +53,9 @@ extern void dr_piezo_burst_sw_20mhz(uint8_t cycles);
 extern void dr_piezo_burst_sw_17mhz(uint8_t cycles);
 extern void dr_piezo_burst_sw_22mhz(uint8_t cycles);
 extern void dr_piezo_burst_sw_19mhz(uint8_t cycles);
+extern void dr_piezo_power_on(void);
 extern void dr_piezo_power_off(void);
+extern bool dr_piezo_is_power_on(void);
 
 #include "parser.h"
 
@@ -1380,6 +1382,11 @@ dr_adc_err_t maa_async_start(uint8_t freq_option, uint16_t delay_us, uint16_t nu
     /* capture all channels without BLE TX, then start transmission */
     g_maa_ctx.state = MAA_ASYNC_CAPTURING;
 
+    if (!dr_piezo_is_power_on())
+    {
+        dr_piezo_power_on();
+    }
+
     /* Warm up CH0 before real capture (MAA_ASYNC_WARMUP_COUNT). */
     for (uint8_t warmup = 0; warmup < MAA_ASYNC_WARMUP_COUNT; warmup++)
     {