From 6e5f041f9aa1c91150988b47ea7de67b9e34b7db Mon Sep 17 00:00:00 2001
From: Wenxue <wenxue.guo@avnet.com>
Date: Tue, 02 Sep 2025 10:08:16 +0800
Subject: [PATCH] GPIO模拟I2C实现SHT20
---
Core/Src/board/sht20.c | 13 ++++++++-----
1 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/Core/Src/board/sht20.c b/Core/Src/board/sht20.c
index 2d279e6..92f9780 100644
--- a/Core/Src/board/sht20.c
+++ b/Core/Src/board/sht20.c
@@ -11,7 +11,7 @@
***********************************************************************/
#include <stdio.h>
#include <string.h>
-#include "i2c.h"
+#include "i2c_bitbang.h"
#include "sht20.h"
#define CONFIG_DEBUG_SHT2X /* Enable SHT20 debug */
@@ -61,6 +61,8 @@
float temp, rh;
int rv;
+ i2c_lock(SHT2X_CHIPADDR);
+
if( sht2x_softreset() < 0 )
{
sht2x_print("SHT20 soft reset failed.\r\n");
@@ -94,6 +96,7 @@
*humdity=rh;
OUT:
+ i2c_free();
return rv;
}
@@ -104,8 +107,8 @@
sht2x_print("Start soft reset sht2x\r\n");
- rv=HAL_I2C_Master_Transmit(&hi2c1, SHT2X_CHIPADDR<<1, &command, 1, 0xFFFFFFFF);
- if( rv != HAL_OK )
+ rv=i2c_write(&command, 1);
+ if( rv )
{
sht2x_print("SHT2X send soft reset command 0x%0x failure: rv=0x%02x\r\n", command, rv);
return -rv;
@@ -161,7 +164,7 @@
return -2;
}
- if( HAL_I2C_Master_Transmit(&hi2c1, SHT2X_CHIPADDR<<1, &command, 1, 0xFFFFFFFF) != HAL_OK )
+ if( i2c_write(&command, 1) < 0 )
{
sht2x_print("SHT2X send measure command 0x%0x failure\r\n", command);
return -3;
@@ -176,7 +179,7 @@
{
memset(buf, 0, 3);
- if( HAL_OK == HAL_I2C_Master_Receive(&hi2c1, SHT2X_CHIPADDR<<1|1, buf, 3, 0xFFFFFFFF) )
+ if( !i2c_read(buf, 3) )
{
break;
}
--
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