From: Keith Packard <keithp@keithp.com>
Date: Tue, 25 Feb 2025 03:47:11 +0000 (-0800)
Subject: altos: ignore the first few battery values in telebt-v4.0-seeed
X-Git-Tag: 1.9.20~1^2~14
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=01930120dfb37a6aeaf1b3800aad62f56a4e67b9;p=fw%2Faltos

altos: ignore the first few battery values in telebt-v4.0-seeed

The ADC appears to get at least the first value wrong, so discard some
before we check the battery voltage.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/telebt-v4.0-seeed/ao_telebt_seeed.c b/src/telebt-v4.0-seeed/ao_telebt_seeed.c
index 75293993..8e27ded0 100644
--- a/src/telebt-v4.0-seeed/ao_telebt_seeed.c
+++ b/src/telebt-v4.0-seeed/ao_telebt_seeed.c
@@ -28,14 +28,17 @@ ao_validate(void)
 {
 	uint8_t data;
 	int16_t	decivolt;
+	int i;
 
 	ao_config_get();
 
 	/* Check the battery voltage */
-	data = ao_data_head;
-	do {
-		ao_sleep((void *) &ao_data_head);
-	} while (ao_data_head == data);
+	for (i = 0; i < 10; i++) {
+		data = ao_data_head;
+		do {
+			ao_sleep((void *) &ao_data_head);
+		} while (ao_data_head == data);
+	}
 	decivolt = ao_battery_decivolt(ao_data_ring[data].adc.v_batt);
 	if (decivolt < 35 || 55 < decivolt)
 		ao_panic(AO_FAIL_ADC);