mirror of
https://github.com/RT-Thread/rt-thread.git
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276 lines
7.4 KiB
C
276 lines
7.4 KiB
C
/*
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* Copyright (c) 2022-2024, Xiaohua Semiconductor Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2024-12-30 CDT first version
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*/
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/*
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* 程序清单：这是 I2C 设备使用例程。
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* 例程导出了 i2c_sample 到控制终端。
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* 命令调用格式：i2c_sample
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* 命令解释：
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* 程序功能：查找I2C模块，读写I2C设备。
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* 注意：测试要用逻辑分析仪或示波器抓取信号
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <board.h>
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/*
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* to readout/write from/into i2c device, user could use this macro to choice
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* either rt_i2c_master_send & rt_i2c_master_recv or rt_i2c_transfer
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*/
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#if defined(RT_USING_I2C)
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#define USING_RT_I2C_TRANSFER
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/* defined EEPROM */
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#if defined(HC32F472) || defined(HC32F460) || defined(HC32F4A0) || defined(HC32F448)
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#define EE_DEV_ADDR 0x50
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#define EE_TEST_PAGE_CNT 8 // Test 8 pages
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#endif
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/* define EEPROM hardware */
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#if defined(HC32F472) || defined(HC32F460) || defined(HC32F448)
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#define EE24C256
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#elif defined(HC32F4A0)
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#define EE24C02
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#endif
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#if defined (EE24C1024)
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#define EE_PAGE_SIZE 256 // 24C1024
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#define EE_WORD_ADR_SIZE 2 // 2 word addr
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#elif defined (EE24C256)
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#define EE_PAGE_SIZE 64 // 24C256
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#define EE_WORD_ADR_SIZE 2 // 2 word addr
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#elif defined (EE24C02)
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#define EE_PAGE_SIZE 8 // 24C02
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#define EE_WORD_ADR_SIZE 1 // 1 word addr
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#endif
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/* device information */
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#if defined(HC32F472) || defined(HC32F4A0) || defined(HC32F448)
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#define HW_I2C_DEV "i2c1"
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#define SW_I2C_DEV "i2c1_sw"
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#elif defined(HC32F460)
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#define HW_I2C_DEV "i2c3"
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#define SW_I2C_DEV "i2c1_sw"
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#endif
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/* this API is for eeprom size is smaller than 256Bytes */
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static void eeprom_page_write(uint32_t page, uint8_t *pBuf)
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{
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struct rt_i2c_bus_device *hc32_i2c = RT_NULL;
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uint8_t TxBuf[EE_PAGE_SIZE + EE_WORD_ADR_SIZE] = {0};
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struct rt_i2c_msg msg[1];
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#if defined (BSP_USING_I2C_HW)
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hc32_i2c = rt_i2c_bus_device_find(HW_I2C_DEV); //hw i2c
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#else
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hc32_i2c = rt_i2c_bus_device_find(SW_I2C_DEV); //sw i2c
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#endif
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/* START --- ADR_W --- WORD_ADR(1 byte) --- DATAn --- STOP */
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if (EE_WORD_ADR_SIZE == 2)
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{
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TxBuf[0] = (page * EE_PAGE_SIZE) / 256; // addrH
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TxBuf[1] = page * EE_PAGE_SIZE; // addrL
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}
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else
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{
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TxBuf[0] = page * EE_PAGE_SIZE;
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}
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for (int i = 0; i < EE_PAGE_SIZE; i++) // data fill
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{
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TxBuf[i + EE_WORD_ADR_SIZE] = *pBuf++;
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}
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msg[0].addr = EE_DEV_ADDR;
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msg[0].flags = RT_I2C_WR;
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msg[0].len = EE_PAGE_SIZE + EE_WORD_ADR_SIZE;
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msg[0].buf = TxBuf;
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#if defined(USING_RT_I2C_TRANSFER)
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rt_i2c_transfer(hc32_i2c, &msg[0], 1);
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#else
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rt_i2c_master_send(hc32_i2c, EE_DEV_ADDR, RT_I2C_NO_STOP, TxBuf, msg[0].len / 2);
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rt_i2c_master_send(hc32_i2c, EE_DEV_ADDR, RT_I2C_NO_START, TxBuf + msg[0].len / 2, msg[0].len - msg[0].len / 2);
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#endif
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/* write cycle 5ms */
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rt_thread_mdelay(5);
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}
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static void eeprom_page_read(uint32_t page, uint8_t *pBuf)
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{
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struct rt_i2c_bus_device *hc32_i2c = RT_NULL;
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uint8_t readAddr[EE_WORD_ADR_SIZE];
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#if defined(USING_RT_I2C_TRANSFER)
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struct rt_i2c_msg msg[2];
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#endif
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#if defined (BSP_USING_I2C_HW)
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hc32_i2c = rt_i2c_bus_device_find(HW_I2C_DEV); //hw i2c
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#else
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hc32_i2c = rt_i2c_bus_device_find(SW_I2C_DEV); //sw i2c
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#endif
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if (EE_WORD_ADR_SIZE == 2)
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{
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readAddr[0] = (page * EE_PAGE_SIZE) / 256; // addrH
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readAddr[1] = page * EE_PAGE_SIZE; // addrL
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}
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else
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{
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readAddr[0] = page * EE_PAGE_SIZE;
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}
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#if defined(USING_RT_I2C_TRANSFER)
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msg[0].addr = EE_DEV_ADDR;
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msg[0].flags = RT_I2C_WR;
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msg[0].len = EE_WORD_ADR_SIZE;
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msg[0].buf = readAddr;
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msg[1].addr = EE_DEV_ADDR;
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msg[1].flags = RT_I2C_RD;
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msg[1].len = EE_PAGE_SIZE;
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msg[1].buf = pBuf;
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rt_i2c_transfer(hc32_i2c, &msg[0], 2);
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#else
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rt_i2c_master_send(hc32_i2c, EE_DEV_ADDR, RT_I2C_NO_STOP, readAddr, EE_WORD_ADR_SIZE);
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rt_i2c_master_recv(hc32_i2c, EE_DEV_ADDR, 0, pBuf, EE_PAGE_SIZE);
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#endif
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}
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void eeprom_test(void)
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{
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uint32_t page, i;
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uint32_t compareValueDiff = 0;
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static rt_uint8_t trans_buf[EE_PAGE_SIZE * EE_TEST_PAGE_CNT];
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static rt_uint8_t recv_buf[EE_PAGE_SIZE * EE_TEST_PAGE_CNT];
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/* write e2 */
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for (i = 0; i < sizeof(trans_buf); i++)
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{
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trans_buf[i] = i;
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}
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for (page = 0; page < EE_TEST_PAGE_CNT; page++)
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{
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eeprom_page_write(page, trans_buf + EE_PAGE_SIZE * page);
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}
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/* read e2 */
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for (i = 0; i < sizeof(trans_buf); i++)
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{
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recv_buf[i] = 0;
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}
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for (page = 0; page < EE_TEST_PAGE_CNT; page++)
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{
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eeprom_page_read(page, recv_buf + EE_PAGE_SIZE * page);
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}
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/* compare e2 */
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for (i = 0; i < sizeof(recv_buf); i++)
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{
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if (trans_buf[i] != recv_buf[i])
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{
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compareValueDiff = 1;
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break;
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}
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}
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if (compareValueDiff == 0)
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{
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rt_kprintf("eeprom test ok!\r\n");
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}
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else
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{
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rt_kprintf("eeprom test failed!\r\n");
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}
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}
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/* TCA9539 device */
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#if defined(HC32F472) || defined(HC32F4A0) || defined(HC32F448)
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/* TCA9539 define */
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#define TCA9539_DEV_ADDR (0x74) // TCA9539 chip address on I2C bus
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#define TCA9539_REG_INPUT_PORT0 (0x00U)
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#define TCA9539_REG_INPUT_PORT1 (0x01U)
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#define TCA9539_REG_OUTPUT_PORT0 (0x02U)
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#define TCA9539_REG_OUTPUT_PORT1 (0x03U)
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#define TCA9539_REG_INVERT_PORT0 (0x04U)
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#define TCA9539_REG_INVERT_PORT1 (0x05U)
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#define TCA9539_REG_CONFIG_PORT0 (0x06U)
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#define TCA9539_REG_CONFIG_PORT1 (0x07U)
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void tca9539_test(void)
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{
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struct rt_i2c_bus_device *hc32_i2c = RT_NULL;
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static rt_uint8_t send_buf0[0x10];
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static rt_uint8_t send_buf1[0x10], recv_buf1[0x10];
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struct rt_i2c_msg msg[2];
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#if defined (BSP_USING_I2C_HW)
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hc32_i2c = rt_i2c_bus_device_find(HW_I2C_DEV); //hw i2c
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#else
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hc32_i2c = rt_i2c_bus_device_find(SW_I2C_DEV); //sw i2c
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#endif
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RT_ASSERT(hc32_i2c != RT_NULL);
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send_buf0[0] = TCA9539_REG_CONFIG_PORT1;
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send_buf0[1] = 0xFF;
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msg[0].addr = TCA9539_DEV_ADDR;
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msg[0].flags = RT_I2C_WR;
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msg[0].len = 2;
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msg[0].buf = send_buf0;
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rt_i2c_transfer(hc32_i2c, &msg[0], 1);
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send_buf0[0] = TCA9539_REG_OUTPUT_PORT1;
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send_buf0[1] = 0xAC;
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msg[1].addr = TCA9539_DEV_ADDR;
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msg[1].flags = RT_I2C_WR;
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msg[1].len = 2;
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msg[1].buf = send_buf0;
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rt_i2c_transfer(hc32_i2c, &msg[1], 1);
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/* read */
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send_buf1[0] = TCA9539_REG_OUTPUT_PORT1;
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msg[0].addr = TCA9539_DEV_ADDR;
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msg[0].flags = RT_I2C_WR;
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msg[0].len = 1;
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msg[0].buf = send_buf1;
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msg[1].addr = TCA9539_DEV_ADDR;
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msg[1].flags = RT_I2C_RD;
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msg[1].len = 1;
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msg[1].buf = recv_buf1;
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rt_i2c_transfer(hc32_i2c, &msg[0], 2);
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if (recv_buf1[0] == 0xAC)
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{
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rt_kprintf("tca9539 test ok!\r\n");
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}
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else
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{
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rt_kprintf("tca9539 test failed!\r\n");
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}
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}
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#endif
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static void i2c_sample(int argc, char *argv[])
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{
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eeprom_test();
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#if defined(HC32F472) || defined(HC32F4A0) || defined(HC32F448)
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tca9539_test();
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#endif
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}
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MSH_CMD_EXPORT(i2c_sample, i2c sample);
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#endif/* RT_USING_I2C */
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/*
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EOF
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*/
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