STM32F0 LL库IIC第二地址配置错误
2024-09-20 21:27:56
最近在做F0项目要用到多个IIC地址，使用Cube生成的LL库，第二地址进不了中断
F0版本：1.11.0
STM32CubeX生成的LL库代码为：
1 static void MX_I2C1_Init(void)
2 {
3
4 /* USER CODE BEGIN I2C1_Init 0 */
5
6 /* USER CODE END I2C1_Init 0 */
7
8 LL_I2C_InitTypeDef I2C_InitStruct = {0};
9
10 LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
11
12 LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOB);
13 /**I2C1 GPIO Configuration
14 PB6 ------> I2C1_SCL
15 PB7 ------> I2C1_SDA
16 */
17 GPIO_InitStruct.Pin = LL_GPIO_PIN_6;
18 GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
19 GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
20 GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
21 GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
22 GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
23 LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
24
25 GPIO_InitStruct.Pin = LL_GPIO_PIN_7;
26 GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
27 GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
28 GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
29 GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
30 GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
31 LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
32
33 /* Peripheral clock enable */
34 LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C1);
35
36 /* I2C1 interrupt Init */
37 NVIC_SetPriority(I2C1_IRQn, 3);
38 NVIC_EnableIRQ(I2C1_IRQn);
39
40 /* USER CODE BEGIN I2C1_Init 1 */
41
42 /* USER CODE END I2C1_Init 1 */
43 /** I2C Initialization
44 */
45 LL_I2C_EnableOwnAddress2(I2C1);
46 LL_I2C_DisableGeneralCall(I2C1);
47 LL_I2C_EnableClockStretching(I2C1);
48 I2C_InitStruct.PeripheralMode = LL_I2C_MODE_I2C;
49 I2C_InitStruct.Timing = 0x2000090E;
50 I2C_InitStruct.AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
51 I2C_InitStruct.DigitalFilter = 0;
52 I2C_InitStruct.OwnAddress1 = 214;
53 I2C_InitStruct.TypeAcknowledge = LL_I2C_ACK;
54 I2C_InitStruct.OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
55 LL_I2C_Init(I2C1, &I2C_InitStruct);
56 LL_I2C_EnableAutoEndMode(I2C1);
57 LL_I2C_SetOwnAddress2(I2C1, 182, LL_I2C_OWNADDRESS2_NOMASK);
58 /* USER CODE BEGIN I2C1_Init 2 */
59
60 /* USER CODE END I2C1_Init 2 */
61
62 }
对比HAL库，发现LL库在配置第二地址时，先使能了第二地址：
LL_I2C_EnableOwnAddress2(I2C1);
导致第二地址配置失败。
更改代码如下：
1 static void MX_I2C1_Init(void)
2 {
3
4 /* USER CODE BEGIN I2C1_Init 0 */
5
6 /* USER CODE END I2C1_Init 0 */
7
8 LL_I2C_InitTypeDef I2C_InitStruct = {0};
9
10 LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
11
12 LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOB);
13 /**I2C1 GPIO Configuration
14 PB6 ------> I2C1_SCL
15 PB7 ------> I2C1_SDA
16 */
17 GPIO_InitStruct.Pin = LL_GPIO_PIN_6;
18 GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
19 GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
20 GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
21 GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
22 GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
23 LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
24
25 GPIO_InitStruct.Pin = LL_GPIO_PIN_7;
26 GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
27 GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
28 GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
29 GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
30 GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
31 LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
32
33 /* Peripheral clock enable */
34 LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C1);
35
36 /* I2C1 interrupt Init */
37 NVIC_SetPriority(I2C1_IRQn, 3);
38 NVIC_EnableIRQ(I2C1_IRQn);
39
40 /* USER CODE BEGIN I2C1_Init 1 */
41
42 /* USER CODE END I2C1_Init 1 */
43 /** I2C Initialization
44 */
45 LL_I2C_DableOwnAddress2(I2C1);
46 LL_I2C_SetOwnAddress2(I2C1, 182, LL_I2C_OWNADDRESS2_NOMASK);
47 LL_I2C_EnableOwnAddress2(I2C1);
48 LL_I2C_DisableGeneralCall(I2C1);
49 LL_I2C_EnableClockStretching(I2C1);
50 I2C_InitStruct.PeripheralMode = LL_I2C_MODE_I2C;
51 I2C_InitStruct.Timing = 0x2000090E;
52 I2C_InitStruct.AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
53 I2C_InitStruct.DigitalFilter = 0;
54 I2C_InitStruct.OwnAddress1 = 214;
55 I2C_InitStruct.TypeAcknowledge = LL_I2C_ACK;
56 I2C_InitStruct.OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
57 LL_I2C_Init(I2C1, &I2C_InitStruct);
58 LL_I2C_EnableAutoEndMode(I2C1);
59
60 /* USER CODE BEGIN I2C1_Init 2 */
61
62 /* USER CODE END I2C1_Init 2 */
63
64 }
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