From 4ef3d81d20850826321a1dcf65b2d1e1194443e0 Mon Sep 17 00:00:00 2001
From: schneider <schneider@blinkenlichts.net>
Date: Sat, 13 May 2023 02:18:52 +0200
Subject: [PATCH] espan: captouch: allow for negative capacity offset
---
components/badge23/captouch.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/components/badge23/captouch.c b/components/badge23/captouch.c
index 36f14c2c74..acfcef7fc0 100644
--- a/components/badge23/captouch.c
+++ b/components/badge23/captouch.c
@@ -21,12 +21,13 @@ static const char *TAG = "captouch";
struct ad714x_chip {
uint8_t addr;
uint8_t gpio;
- int afe_offsets[13];
+ int pos_afe_offsets[13];
+ int neg_afe_offsets[13];
int stages;
};
-static const struct ad714x_chip chip_top = {.addr = AD7147_BASE_ADDR + 1, .gpio = 48, .afe_offsets = {24, 12, 16, 33, 30, 28, 31, 27, 22, 24, 18, 19, }, .stages=12};
-static const struct ad714x_chip chip_bot = {.addr = AD7147_BASE_ADDR, .gpio = 3, .afe_offsets = {3, 2, 1, 1 ,1, 1, 1, 1, 2, 3}, .stages=10};
+static const struct ad714x_chip chip_top = {.addr = AD7147_BASE_ADDR + 1, .gpio = 48, .pos_afe_offsets = {24, 12, 16, 33, 30, 28, 31, 27, 22, 24, 18, 19, }, .stages=12};
+static const struct ad714x_chip chip_bot = {.addr = AD7147_BASE_ADDR, .gpio = 3, .pos_afe_offsets = {3, 2, 1, 1 ,1, 1, 1, 1, 2, 3}, .stages=10};
static esp_err_t ad714x_i2c_write(const struct ad714x_chip *chip, const uint16_t reg, const uint16_t data)
{
@@ -219,7 +220,9 @@ static void captouch_init_chip(const struct ad714x_chip* chip, const struct ad71
struct ad7147_stage_config stage_config;
stage_config = ad714x_default_config();
stage_config.cinX_connection_setup[i] = CIN_CDC_POS;
- stage_config.pos_afe_offset=chip->afe_offsets[i];
+ stage_config.pos_afe_offset=chip->pos_afe_offsets[i];
+ stage_config.neg_afe_offset=chip->neg_afe_offsets[i];
+ stage_config.neg_afe_offset_swap=1;
ad714x_set_stage_config(chip, i, &stage_config);
}
--
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