1 /**
2 * Copyright (c) 2020 HiSilicon (Shanghai) Technologies CO., LIMITED.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 *
15 * Description: Provides iot_i2c driver source \n
16 *
17 * History: \n
18 * 2023-10-18， Create file. \n
19 */
20 #include "iot_errno.h"
21 #include "i2c.h"
22 #include "iot_i2c.h"
23
IoTI2cInit(unsigned int id,unsigned int baudrate)24 unsigned int IoTI2cInit(unsigned int id, unsigned int baudrate)
25 {
26 uint8_t hscode = 0x0;
27 #if defined(CONFIG_I2C_SUPPORT_DMA)
28 uapi_dma_init();
29 uapi_dma_open();
30 #endif
31 if (uapi_i2c_master_init((i2c_bus_t)id, (uint32_t)baudrate, hscode) != ERRCODE_SUCC) {
32 return IOT_FAILURE;
33 }
34 #if defined(CONFIG_I2C_SUPPORT_INT)
35 uapi_i2c_set_irq_mode((i2c_bus_t)id, 1);
36 #endif
37 return IOT_SUCCESS;
38 }
39
IoTI2cDeinit(unsigned int id)40 unsigned int IoTI2cDeinit(unsigned int id)
41 {
42 if (uapi_i2c_deinit((i2c_bus_t)id) != ERRCODE_SUCC) {
43 return IOT_FAILURE;
44 }
45 return IOT_SUCCESS;
46 }
47
IoTI2cWrite(unsigned int id,unsigned short deviceAddr,const unsigned char * data,unsigned int dataLen)48 unsigned int IoTI2cWrite(unsigned int id, unsigned short deviceAddr, const unsigned char *data, unsigned int dataLen)
49 {
50 if (data == NULL) {
51 return IOT_FAILURE;
52 }
53 i2c_data_t datas = { 0 };
54 datas.send_buf = (uint8_t *)data;
55 datas.send_len = (uint32_t)dataLen;
56
57 if (uapi_i2c_master_write((i2c_bus_t)id, (uint16_t)deviceAddr, &datas) != ERRCODE_SUCC) {
58 return IOT_FAILURE;
59 }
60 return IOT_SUCCESS;
61 }
62
IoTI2cRead(unsigned int id,unsigned short deviceAddr,unsigned char * data,unsigned int dataLen)63 unsigned int IoTI2cRead(unsigned int id, unsigned short deviceAddr, unsigned char *data, unsigned int dataLen)
64 {
65 if (data == NULL) {
66 return IOT_FAILURE;
67 }
68 i2c_data_t datas = { 0 };
69 datas.receive_buf = (uint8_t *)data;
70 datas.receive_len = (uint32_t)dataLen;
71
72 if (uapi_i2c_master_read((i2c_bus_t)id, (uint16_t)deviceAddr, &datas) != ERRCODE_SUCC) {
73 return IOT_FAILURE;
74 }
75 return IOT_SUCCESS;
76 }
77
IoTI2cSetBaudrate(unsigned int id,unsigned int baudrate)78 unsigned int IoTI2cSetBaudrate(unsigned int id, unsigned int baudrate)
79 {
80 if (uapi_i2c_set_baudrate((i2c_bus_t)id, (uint32_t)baudrate) != ERRCODE_SUCC) {
81 return IOT_FAILURE;
82 }
83 return IOT_SUCCESS;
84 }