From e0b9aab10338e01f3e9669d2eda945d86c818465 Mon Sep 17 00:00:00 2001
From: yelvlab <wanghao19950516@gmail.com>
Date: Sat, 7 Dec 2024 16:30:43 +0800
Subject: [PATCH] fix IIC speed

---
 inc/LDC1612.h |  2 +-
 src/LDC1612.c | 22 +++++++++++++---------
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/inc/LDC1612.h b/inc/LDC1612.h
index 0b0bb49..d31f3aa 100644
--- a/inc/LDC1612.h
+++ b/inc/LDC1612.h
@@ -44,7 +44,7 @@ typedef enum {
     I2C_STOP
 } i2c_process_enum;
 
-#define I2C_SPEED 400000
+#define I2C_SPEED 100000
 #define RCU_IR_GPIO RCU_GPIOF
 #define RCU_I2C RCU_I2C0
 #define I2C_SCL_PORT GPIOF
diff --git a/src/LDC1612.c b/src/LDC1612.c
index 075dec9..d9093e5 100644
--- a/src/LDC1612.c
+++ b/src/LDC1612.c
@@ -101,6 +101,8 @@ void I2C_scan(void) {
 uint8_t IIC_read_16bit(uint8_t reg, uint16_t *value) {
     uint32_t timeout = 0;
 
+    i2c_ack_config(I2C0, I2C_ACK_ENABLE);
+
     // 发送启动信号
     i2c_start_on_bus(I2C0);
     timeout = 0;
@@ -129,7 +131,7 @@ uint8_t IIC_read_16bit(uint8_t reg, uint16_t *value) {
     while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)) {
         if ((timeout++) > I2C_TIME_OUT) return 4;  // 超时
     }
-
+    printf("test1\n");
     // 发送从设备地址和读信号
     i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_RECEIVER);
     timeout = 0;
@@ -145,6 +147,8 @@ uint8_t IIC_read_16bit(uint8_t reg, uint16_t *value) {
     }
     *value = i2c_data_receive(I2C0) << 8;  // 读取高8位
 
+    // i2c_ack_config(I2C0, I2C_ACK_DISABLE); // 关闭发送ACK，它会在下一个字节完成后发送NAK
+
     timeout = 0;
     while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE)) {
         if ((timeout++) > I2C_TIME_OUT) return 7;  // 超时
@@ -174,12 +178,12 @@ void LDC1612_read_sensor_infomation(void)
         printf("result: %d\n", result);
     }
 
-    result = IIC_read_16bit(READ_MANUFACTURER_ID, &manufacturer_id);
-
-    if (result == 0) {
-        printf("manufacturer  ID: 0x%04X\n", manufacturer_id);
-    } else {
-        printf("Failed to read manufacturer ID\n");
-        printf("result: %d\n", result);
-    }
+    // result = IIC_read_16bit(READ_MANUFACTURER_ID, &manufacturer_id);
+    //
+    // if (result == 0) {
+    //     printf("manufacturer  ID: 0x%04X\n", manufacturer_id);
+    // } else {
+    //     printf("Failed to read manufacturer ID\n");
+    //     printf("result: %d\n", result);
+    // }
 }
\ No newline at end of file