From 4e0587bb8e9658c44fac0c26c29e9d59eea0fbed Mon Sep 17 00:00:00 2001
From: Leif Jakob <jakob@weite-welt.com>
Date: Tue, 25 Apr 2023 09:41:37 +0200
Subject: [PATCH] use weak references for HAL functions that control low-speed
 pins - allows override with own symbols

---
 src/hal/hal_esp32.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/hal/hal_esp32.c b/src/hal/hal_esp32.c
index c967fbd..6ec41f0 100755
--- a/src/hal/hal_esp32.c
+++ b/src/hal/hal_esp32.c
@@ -152,6 +152,7 @@ void init_io(void)
     ESP_LOGI(TAG, "IO initialized");
 }
 
+__attribute__((weak)) // duplicate this symbol if your pin is controlled by e.g. I2C
 void hal_pin_rxtx(u1_t val)
 {
     if (pin_rx_tx == LMIC_UNUSED_PIN)
@@ -160,6 +161,7 @@ void hal_pin_rxtx(u1_t val)
     gpio_set_level(pin_rx_tx, val);
 }
 
+__attribute__((weak)) // duplicate this symbol if your pin is controlled by e.g. I2C
 void hal_pin_rst(u1_t val)
 {
     if (pin_rst == LMIC_UNUSED_PIN)
@@ -252,6 +254,7 @@ void hal_spi_read(u1_t cmd, u1_t *buf, size_t len)
     ESP_ERROR_CHECK(err);
 }
 
+
 void IRAM_ATTR assert_nss(spi_transaction_t* trans)
 {
     gpio_set_level(pin_nss, 0);