gd32 i2c 中断 主机从机双向通信例程

Master
I2C0_SCL PB8 AF4
I2C0_SDA PB9 AF4

Slave
I2C1_SCL PB10 AF4
I2C1_SDA PB11 AF4

//主机中断发送
void i2c_master_transmit_it(uint32_t address, uint8_t* buff, uint32_t size);
//主机中断接收
void i2c_master_receive_it(uint32_t address, uint8_t* buff, uint32_t size, uint32_t* size_out);

//从机中断发送
void i2c_slave_transmit_it(uint8_t* buff, uint32_t size);
//从机中断接收
void i2c_slave_receive_it(uint8_t* buff, uint32_t* size_out);

main.c

/*!\file    main.c\brief   running LED\version 2023-03-31, V1.0.0, firmware for GD32H7xx
*/#include "gd32h7xx.h"
#include "systick.h"#include "string.h"
#include "stdio.h"#define I2C_SLAVE_ADDRESS7 0x82/*!\brief      enable the CPU Chache\param[in]  none\param[out] none\retval     none
*/
static void cache_enable(void)
{/* Enable I-Cache */SCB_EnableICache();/* Enable D-Cache */
//    SCB_EnableDCache();
}void led_config()
{rcu_periph_clock_enable(RCU_GPIOJ);gpio_mode_set(GPIOJ, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_8);gpio_output_options_set(GPIOJ, GPIO_OTYPE_PP, GPIO_OSPEED_60MHZ, GPIO_PIN_8);gpio_mode_set(GPIOJ, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_9);gpio_output_options_set(GPIOJ, GPIO_OTYPE_PP, GPIO_OSPEED_60MHZ, GPIO_PIN_9);gpio_bit_set(GPIOJ, GPIO_PIN_8);gpio_bit_set(GPIOJ, GPIO_PIN_9);}void usart_config()
{rcu_periph_clock_enable(RCU_GPIOB);rcu_periph_clock_enable(RCU_USART0);gpio_af_set(GPIOB, GPIO_AF_7, GPIO_PIN_6);gpio_af_set(GPIOB, GPIO_AF_7, GPIO_PIN_7);gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_6);gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_100_220MHZ, GPIO_PIN_6);gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_7);gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_100_220MHZ, GPIO_PIN_7);usart_deinit(USART0);usart_word_length_set(USART0, USART_WL_8BIT);usart_stop_bit_set(USART0, USART_STB_1BIT);usart_parity_config(USART0, USART_PM_NONE);usart_baudrate_set(USART0, 921600U);usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);usart_receive_config(USART0, USART_RECEIVE_ENABLE);usart_enable(USART0);
}void usart_transmit(char* buff, int size)
{for (int i = 0; i < size; ++i) {usart_data_transmit(USART0, buff[i]);while (RESET == usart_flag_get(USART0, USART_FLAG_TBE)) {}}
}/** Master* I2C0_SCL PB8  AF4* I2C0_SDA PB9  AF4*/
void i2c0_config()
{rcu_periph_clock_enable(RCU_GPIOB);gpio_af_set(GPIOB, GPIO_AF_4, GPIO_PIN_8 | GPIO_PIN_9);gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_8 | GPIO_PIN_9);gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_100_220MHZ, GPIO_PIN_8 | GPIO_PIN_9);rcu_periph_clock_enable(RCU_I2C0);i2c_deinit(I2C0);i2c_timing_config(I2C0, 0x3, 0x9, 0x0);i2c_master_clock_config(I2C0, 0x96, 0xda);i2c_enable(I2C0);nvic_irq_enable(I2C0_EV_IRQn, 2, 0);nvic_irq_enable(I2C0_ER_IRQn, 2, 1);
}uint8_t* master_tx_buff;
uint8_t* master_rx_buff;
uint32_t* master_rx_recv_cnt;void I2C0_EV_IRQHandler()
{if (RESET != i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_STPDET)) {i2c_interrupt_flag_clear(I2C0, I2C_INT_FLAG_STPDET);} else if (RESET != i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_TI)) {i2c_data_transmit(I2C0, *master_tx_buff++);} else if (RESET != i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_RBNE)) {*master_rx_buff++ = i2c_data_receive(I2C0);*master_rx_recv_cnt += 1;} else if (RESET != i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_TC)) {i2c_stop_on_bus(I2C0);i2c_interrupt_disable(I2C0, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_TI | I2C_INT_RBNE | I2C_INT_TC);}
}void I2C0_ER_IRQHandler()
{if (i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_BERR)) {i2c_interrupt_flag_clear(I2C0, I2C_INT_FLAG_BERR);}if (i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_LOSTARB)) {i2c_interrupt_flag_clear(I2C0, I2C_INT_FLAG_LOSTARB);}if (i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_OUERR)) {i2c_interrupt_flag_clear(I2C0, I2C_INT_FLAG_OUERR);}if (i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_PECERR)) {i2c_interrupt_flag_clear(I2C0, I2C_INT_FLAG_PECERR);}if (i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_TIMEOUT)) {i2c_interrupt_flag_clear(I2C0, I2C_INT_FLAG_TIMEOUT);}if (i2c_interrupt_flag_get(I2C0, I2C_INT_FLAG_SMBALT)) {i2c_interrupt_flag_clear(I2C0, I2C_INT_FLAG_SMBALT);}i2c_interrupt_disable(I2C0, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_RBNE | I2C_INT_TI | I2C_INT_TC);
}void i2c_master_transmit_it(uint32_t address, uint8_t* buff, uint32_t size)
{master_tx_buff = buff;i2c_master_addressing(I2C0, address, I2C_MASTER_TRANSMIT);i2c_transfer_byte_number_config(I2C0, size);i2c_interrupt_enable(I2C0, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_TI | I2C_INT_TC);while(i2c_flag_get(I2C0, I2C_FLAG_I2CBSY)) { } //等待总线空闲I2C_STAT(I2C0) |= I2C_STAT_TBE;i2c_start_on_bus(I2C0);
}void i2c_master_receive_it(uint32_t address, uint8_t* buff, uint32_t size, uint32_t* size_out)
{master_rx_buff = buff;master_rx_recv_cnt = size_out;*master_rx_recv_cnt = 0;i2c_master_addressing(I2C0, address, I2C_MASTER_RECEIVE);i2c_transfer_byte_number_config(I2C0, size);i2c_interrupt_enable(I2C0, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_RBNE | I2C_INT_TC);while(i2c_flag_get(I2C0, I2C_FLAG_I2CBSY)) { } //等待总线空闲i2c_start_on_bus(I2C0);
}/** Slave* I2C1_SCL PB10 AF4* I2C1_SDA PB11 AF4*/
void i2c1_config()
{rcu_periph_clock_enable(RCU_GPIOB);gpio_af_set(GPIOB, GPIO_AF_4, GPIO_PIN_10 | GPIO_PIN_11);gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_10 | GPIO_PIN_11);gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_100_220MHZ, GPIO_PIN_10 | GPIO_PIN_11);rcu_periph_clock_enable(RCU_I2C1);i2c_deinit(I2C1);i2c_address_config(I2C1, I2C_SLAVE_ADDRESS7, I2C_ADDFORMAT_7BITS);i2c_enable(I2C1);nvic_irq_enable(I2C1_EV_IRQn, 2, 2);nvic_irq_enable(I2C1_ER_IRQn, 2, 3);
}uint8_t* slave_tx_buff;
uint8_t* slave_rx_buff;
uint32_t* slave_rx_recv_cnt;void I2C1_EV_IRQHandler()
{if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_ADDSEND)) {i2c_interrupt_flag_clear(I2C1, I2C_INT_FLAG_ADDSEND);I2C_STAT(I2C1) |= I2C_STAT_TBE;} else if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_RBNE)) {*slave_rx_buff++ = i2c_data_receive(I2C1);*slave_rx_recv_cnt += 1;} else if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_TI)) {i2c_data_transmit(I2C1, *slave_tx_buff++);} else if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_STPDET)) {i2c_interrupt_flag_clear(I2C1, I2C_INT_FLAG_STPDET);i2c_interrupt_disable(I2C1, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_ADDM | I2C_INT_TI | I2C_INT_RBNE);}
}void I2C1_ER_IRQHandler()
{if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_BERR)) {i2c_interrupt_flag_clear(I2C1, I2C_INT_FLAG_BERR);}if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_LOSTARB)) {i2c_interrupt_flag_clear(I2C1, I2C_INT_FLAG_LOSTARB);}if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_OUERR)) {i2c_interrupt_flag_clear(I2C1, I2C_INT_FLAG_OUERR);}if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_PECERR)) {i2c_interrupt_flag_clear(I2C1, I2C_INT_FLAG_PECERR);}if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_TIMEOUT)) {i2c_interrupt_flag_clear(I2C1, I2C_INT_FLAG_TIMEOUT);}if (i2c_interrupt_flag_get(I2C1, I2C_INT_FLAG_SMBALT)) {i2c_interrupt_flag_clear(I2C1, I2C_INT_FLAG_SMBALT);}i2c_interrupt_disable(I2C1, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_ADDM | I2C_INT_RBNE | I2C_INT_TI);
}void i2c_slave_transmit_it(uint8_t* buff, uint32_t size)
{slave_tx_buff = buff;i2c_interrupt_enable(I2C1, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_ADDM | I2C_INT_TI);
}void i2c_slave_receive_it(uint8_t* buff, uint32_t* size_out)
{slave_rx_recv_cnt = size_out;*slave_rx_recv_cnt = 0;slave_rx_buff = buff;i2c_interrupt_enable(I2C1, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_ADDM | I2C_INT_RBNE);
}/*!\brief      main function\param[in]  none\param[out] none\retval     none
*/
int main(void)
{/* enable the CPU Cache */cache_enable();/* configure systick */systick_config();led_config();usart_config();i2c0_config();i2c1_config();while(1) {//-----------------------------------------------------------------------uint8_t tx1[8] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88};uint8_t rx1[8] = {0};uint32_t rx1_recv_bytes = 0;i2c_slave_receive_it(rx1, &rx1_recv_bytes);i2c_master_transmit_it(I2C_SLAVE_ADDRESS7, tx1, 8);delay_1ms(10);//上位机应接收到 "0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88"usart_transmit(rx1, rx1_recv_bytes);//-----------------------------------------------------------------------uint8_t tx2[4] = {0x44, 0x33, 0x22, 0x11};uint8_t rx2[4] = {0};uint32_t rx2_recv_bytes = 0;i2c_slave_receive_it(rx2, &rx2_recv_bytes);i2c_master_transmit_it(I2C_SLAVE_ADDRESS7, tx2, 4);delay_1ms(10);//上位机应接收到 "0x44, 0x33, 0x22, 0x11"usart_transmit(rx2, rx2_recv_bytes);//-----------------------------------------------------------------------uint8_t tx3[4] = {0x12, 0x34, 0x56, 0x78};uint8_t rx3[4] = {0};uint32_t rx3_recv_bytes = 0;i2c_slave_transmit_it(tx3, 4);i2c_master_receive_it(I2C_SLAVE_ADDRESS7, rx3, 4,  &rx3_recv_bytes);delay_1ms(10);//上位机应接收到 "0x12, 0x34, 0x56, 0x78"usart_transmit(rx3, rx3_recv_bytes);//-----------------------------------------------------------------------uint8_t tx4[4] = {0xaa, 0xbb, 0xcc, 0xdd};uint8_t rx4[4] = {0};uint32_t rx4_recv_bytes = 0;i2c_slave_transmit_it(tx4, 4);i2c_master_receive_it(I2C_SLAVE_ADDRESS7, rx4, 4,  &rx4_recv_bytes);delay_1ms(10);//上位机应接收到 "0xaa, 0xbb, 0xcc, 0xdd"usart_transmit(rx4, rx4_recv_bytes);delay_1ms(1000);}
}