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/*
* Copyright (c) 2022-2024, Xiaohua Semiconductor Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-12-30 CDT first version
*/
/*
* 程序清单：这是 I2C 设备使用例程。
* 例程导出了 i2c_sample 到控制终端。
* 命令调用格式：i2c_sample
* 命令解释：
* 程序功能：查找I2C模块，读写I2C设备。
* 注意：测试要用逻辑分析仪或示波器抓取信号
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
/*
* to readout/write from/into i2c device, user could use this macro to choice
* either rt_i2c_master_send & rt_i2c_master_recv or rt_i2c_transfer
*/
#if defined(RT_USING_I2C)
#define USING_RT_I2C_TRANSFER
/* defined EEPROM */
#if defined(HC32F472) || defined(HC32F460) || defined(HC32F4A0) || defined(HC32F448) || defined(HC32F4A8) || \
defined(HC32F334)
#define EE_DEV_ADDR 0x50
#define EE_TEST_PAGE_CNT 8 // Test 8 pages
#endif
/* define EEPROM hardware */
#if defined(HC32F472) || defined(HC32F460) || defined(HC32F448) || defined(HC32F4A8) || defined(HC32F334)
#define EE24C256
#elif defined(HC32F4A0)
#define EE24C02
#endif
#if defined (EE24C1024)
#define EE_PAGE_SIZE 256 // 24C1024
#define EE_WORD_ADR_SIZE 2 // 2 word addr
#elif defined (EE24C256)
#define EE_PAGE_SIZE 64 // 24C256
#define EE_WORD_ADR_SIZE 2 // 2 word addr
#elif defined (EE24C02)
#define EE_PAGE_SIZE 8 // 24C02
#define EE_WORD_ADR_SIZE 1 // 1 word addr
#endif
/* device information */
#if defined(HC32F472) || defined(HC32F4A0) || defined(HC32F448) || defined(HC32F4A8) || defined(HC32F334)
#define HW_I2C_DEV "i2c1"
#define SW_I2C_DEV "i2c1_sw"
#elif defined(HC32F460)
#define HW_I2C_DEV "i2c3"
#define SW_I2C_DEV "i2c1_sw"
#endif
/* this API is for eeprom size is smaller than 256Bytes */
static void eeprom_page_write(uint32_t page, uint8_t *pBuf)
{
struct rt_i2c_bus_device *hc32_i2c = RT_NULL;
uint8_t TxBuf[EE_PAGE_SIZE + EE_WORD_ADR_SIZE] = {0};
struct rt_i2c_msg msg[1];
#if defined (BSP_USING_I2C_HW)
hc32_i2c = rt_i2c_bus_device_find(HW_I2C_DEV); //hw i2c
#else
hc32_i2c = rt_i2c_bus_device_find(SW_I2C_DEV); //sw i2c
#endif
/* START --- ADR_W --- WORD_ADR(1 byte) --- DATAn --- STOP */
if (EE_WORD_ADR_SIZE == 2)
{
TxBuf[0] = (page * EE_PAGE_SIZE) / 256; // addrH
TxBuf[1] = page * EE_PAGE_SIZE; // addrL
}
else
{
TxBuf[0] = page * EE_PAGE_SIZE;
}
for (int i = 0; i < EE_PAGE_SIZE; i++) // data fill
{
TxBuf[i + EE_WORD_ADR_SIZE] = *pBuf++;
}
msg[0].addr = EE_DEV_ADDR;
msg[0].flags = RT_I2C_WR;
msg[0].len = EE_PAGE_SIZE + EE_WORD_ADR_SIZE;
msg[0].buf = TxBuf;
#if defined(USING_RT_I2C_TRANSFER)
rt_i2c_transfer(hc32_i2c, &msg[0], 1);
#else
rt_i2c_master_send(hc32_i2c, EE_DEV_ADDR, RT_I2C_NO_STOP, TxBuf, msg[0].len / 2);
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);
#endif
/* write cycle 5ms */
rt_thread_mdelay(5);
}
static void eeprom_page_read(uint32_t page, uint8_t *pBuf)
{
struct rt_i2c_bus_device *hc32_i2c = RT_NULL;
uint8_t readAddr[EE_WORD_ADR_SIZE];
#if defined(USING_RT_I2C_TRANSFER)
struct rt_i2c_msg msg[2];
#endif
#if defined (BSP_USING_I2C_HW)
hc32_i2c = rt_i2c_bus_device_find(HW_I2C_DEV); //hw i2c
#else
hc32_i2c = rt_i2c_bus_device_find(SW_I2C_DEV); //sw i2c
#endif
if (EE_WORD_ADR_SIZE == 2)
{
readAddr[0] = (page * EE_PAGE_SIZE) / 256; // addrH
readAddr[1] = page * EE_PAGE_SIZE; // addrL
}
else
{
readAddr[0] = page * EE_PAGE_SIZE;
}
#if defined(USING_RT_I2C_TRANSFER)
msg[0].addr = EE_DEV_ADDR;
msg[0].flags = RT_I2C_WR;
msg[0].len = EE_WORD_ADR_SIZE;
msg[0].buf = readAddr;
msg[1].addr = EE_DEV_ADDR;
msg[1].flags = RT_I2C_RD;
msg[1].len = EE_PAGE_SIZE;
msg[1].buf = pBuf;
rt_i2c_transfer(hc32_i2c, &msg[0], 2);
#else
rt_i2c_master_send(hc32_i2c, EE_DEV_ADDR, RT_I2C_NO_STOP, readAddr, EE_WORD_ADR_SIZE);
rt_i2c_master_recv(hc32_i2c, EE_DEV_ADDR, 0, pBuf, EE_PAGE_SIZE);
#endif
}
void eeprom_test(void)
{
uint32_t page, i;
uint32_t compareValueDiff = 0;
static rt_uint8_t trans_buf[EE_PAGE_SIZE * EE_TEST_PAGE_CNT];
static rt_uint8_t recv_buf[EE_PAGE_SIZE * EE_TEST_PAGE_CNT];
/* write e2 */
for (i = 0; i < sizeof(trans_buf); i++)
{
trans_buf[i] = i;
}
for (page = 0; page < EE_TEST_PAGE_CNT; page++)
{
eeprom_page_write(page, trans_buf + EE_PAGE_SIZE * page);
}
/* read e2 */
for (i = 0; i < sizeof(trans_buf); i++)
{
recv_buf[i] = 0;
}
for (page = 0; page < EE_TEST_PAGE_CNT; page++)
{
eeprom_page_read(page, recv_buf + EE_PAGE_SIZE * page);
}
/* compare e2 */
for (i = 0; i < sizeof(recv_buf); i++)
{
if (trans_buf[i] != recv_buf[i])
{
compareValueDiff = 1;
break;
}
}
if (compareValueDiff == 0)
{
rt_kprintf("eeprom test ok!\r\n");
}
else
{
rt_kprintf("eeprom test failed!\r\n");
}
}
/* TCA9539 device */
#if defined(HC32F472) || defined(HC32F4A0) || defined(HC32F448) || defined(HC32F4A8)
/* TCA9539 define */
#define TCA9539_DEV_ADDR (0x74) // TCA9539 chip address on I2C bus
#define TCA9539_REG_INPUT_PORT0 (0x00U)
#define TCA9539_REG_INPUT_PORT1 (0x01U)
#define TCA9539_REG_OUTPUT_PORT0 (0x02U)
#define TCA9539_REG_OUTPUT_PORT1 (0x03U)
#define TCA9539_REG_INVERT_PORT0 (0x04U)
#define TCA9539_REG_INVERT_PORT1 (0x05U)
#define TCA9539_REG_CONFIG_PORT0 (0x06U)
#define TCA9539_REG_CONFIG_PORT1 (0x07U)
void tca9539_test(void)
{
struct rt_i2c_bus_device *hc32_i2c = RT_NULL;
static rt_uint8_t send_buf0[0x10];
static rt_uint8_t send_buf1[0x10], recv_buf1[0x10];
struct rt_i2c_msg msg[2];
#if defined (BSP_USING_I2C_HW)
hc32_i2c = rt_i2c_bus_device_find(HW_I2C_DEV); //hw i2c
#else
hc32_i2c = rt_i2c_bus_device_find(SW_I2C_DEV); //sw i2c
#endif
RT_ASSERT(hc32_i2c != RT_NULL);
send_buf0[0] = TCA9539_REG_CONFIG_PORT1;
send_buf0[1] = 0xFF;
msg[0].addr = TCA9539_DEV_ADDR;
msg[0].flags = RT_I2C_WR;
msg[0].len = 2;
msg[0].buf = send_buf0;
rt_i2c_transfer(hc32_i2c, &msg[0], 1);
send_buf0[0] = TCA9539_REG_OUTPUT_PORT1;
send_buf0[1] = 0xAC;
msg[1].addr = TCA9539_DEV_ADDR;
msg[1].flags = RT_I2C_WR;
msg[1].len = 2;
msg[1].buf = send_buf0;
rt_i2c_transfer(hc32_i2c, &msg[1], 1);
/* read */
send_buf1[0] = TCA9539_REG_OUTPUT_PORT1;
msg[0].addr = TCA9539_DEV_ADDR;
msg[0].flags = RT_I2C_WR;
msg[0].len = 1;
msg[0].buf = send_buf1;
msg[1].addr = TCA9539_DEV_ADDR;
msg[1].flags = RT_I2C_RD;
msg[1].len = 1;
msg[1].buf = recv_buf1;
rt_i2c_transfer(hc32_i2c, &msg[0], 2);
if (recv_buf1[0] == 0xAC)
{
rt_kprintf("tca9539 test ok!\r\n");
}
else
{
rt_kprintf("tca9539 test failed!\r\n");
}
}
#endif
static void i2c_sample(int argc, char *argv[])
{
eeprom_test();
#if defined(HC32F472) || defined(HC32F4A0) || defined(HC32F448) || defined(HC32F4A8)
tca9539_test();
#endif
}
MSH_CMD_EXPORT(i2c_sample, i2c sample);
#endif/* RT_USING_I2C */
/*
EOF
*/
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