GD32F105RCT6硬件IIC驱动24C02

/*------------------------------------------------头文件区------------------------------------------------*/ #include "app_eeprom.h" /*------------------------------------------------宏定义区------------------------------------------------*/ /*主设备地址*/ #define EEPROM_MASTER_ADDRESS 0x72 /*从设备地址*/ #define EEPROM_SLAVE_ADDRESS 0xA0 /*读写地址*/ #define EEPROM_RW_ADDRESS 0x00 /*-----------------------------------------------类型定义区-----------------------------------------------*/ /*---------------------------------------------静态函数声明区---------------------------------------------*/ /*---------------------------------------------全局变量定义区---------------------------------------------*/ /*-----------------------------------------------函数实现区-----------------------------------------------*/ /*eeprom初始化*/ void app_eeprom_init(void) { /* enable GPIOB clock */ rcu_periph_clock_enable(RCU_GPIOB); /* enable I2C1 clock */ rcu_periph_clock_enable(RCU_I2C1); /* I2C1 GPIO ports */ /* connect PB10 to I2C1_SCL */ /* connect PB11 to I2C1_SDA */ gpio_init(GPIOB, GPIO_MODE_AF_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_10 | GPIO_PIN_11); /* I2C clock configure */ i2c_clock_config(I2C1, 100000, I2C_DTCY_2); /* I2C address configure */ i2c_mode_addr_config(I2C1, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, EEPROM_MASTER_ADDRESS); /* enable I2C1 */ i2c_enable(I2C1); /* enable acknowledge */ i2c_ack_config(I2C1, I2C_ACK_ENABLE); } /*向eeprom写入数据*/ bool app_eeprom_write(uint8_t *buff, uint16_t len) { /* wait until I2C bus is idle */ while(i2c_flag_get(I2C1, I2C_FLAG_I2CBSY)); /* send a start condition to I2C bus */ i2c_start_on_bus(I2C1); /* wait until SBSEND bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_SBSEND)); /* send slave address to I2C bus */ i2c_master_addressing(I2C1, EEPROM_SLAVE_ADDRESS, I2C_TRANSMITTER); /* wait until ADDSEND bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_ADDSEND)); /* clear ADDSEND bit */ i2c_flag_clear(I2C1, I2C_FLAG_ADDSEND); /* wait until the transmit data buffer is empty */ while(!i2c_flag_get(I2C1, I2C_FLAG_TBE)); /* write addr transmission */ /* 注意：24c02连续写不会自动翻页，注意每页字节数 */ i2c_data_transmit(I2C1, EEPROM_RW_ADDRESS); /* wait until the TBE bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_TBE)); for(uint16_t i = 0; i < len; i++) { /* data transmission */ i2c_data_transmit(I2C1, buff[i]); /* wait until the TBE bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_TBE)); } /* send a stop condition to I2C bus */ i2c_stop_on_bus(I2C1); while(I2C_CTL0(I2C1)&0x0200); return TRUE; } /*从eeprom读取数据*/ bool app_eeprom_read(uint8_t *buff, uint16_t len) { /* wait until I2C bus is idle */ while(i2c_flag_get(I2C1, I2C_FLAG_I2CBSY)); /* send a start condition to I2C bus */ i2c_start_on_bus(I2C1); /* wait until SBSEND bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_SBSEND)); /* send slave address to I2C bus */ i2c_master_addressing(I2C1, EEPROM_SLAVE_ADDRESS, I2C_TRANSMITTER); /* wait until ADDSEND bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_ADDSEND)); /* clear ADDSEND bit */ i2c_flag_clear(I2C1, I2C_FLAG_ADDSEND); /* wait until the transmit data buffer is empty */ while(!i2c_flag_get(I2C1, I2C_FLAG_TBE)); /* write addr transmission */ i2c_data_transmit(I2C1, EEPROM_RW_ADDRESS); /* wait until the TBE bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_TBE)); /* send a start condition to I2C bus */ i2c_start_on_bus(I2C1); /* wait until SBSEND bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_SBSEND)); /* send slave address to I2C bus */ i2c_master_addressing(I2C1, EEPROM_SLAVE_ADDRESS, I2C_RECEIVER); /* wait until ADDSEND bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_ADDSEND)); /* clear ADDSEND bit */ i2c_flag_clear(I2C1, I2C_FLAG_ADDSEND); for(uint8_t i = 0; i<len; i++) { if(i == len - 1) { /* disable acknowledge */ i2c_ack_config(I2C1, I2C_ACK_DISABLE); } /* wait until the RBNE bit is set */ while(!i2c_flag_get(I2C1, I2C_FLAG_RBNE)); /* read a data from I2C_DATA */ buff[i] = i2c_data_receive(I2C1); } /* send a stop condition to I2C bus */ i2c_stop_on_bus(I2C1); /* wait until stop condition generate */ while(I2C_CTL0(I2C1)&0x0200); /* enable acknowledge */ i2c_ack_config(I2C1, I2C_ACK_ENABLE); return TRUE; }