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#include "gd32f30x.h"
#include <stdio.h>
#include "I2C_IE.h"
#include "gd32f307c_eval.h"
void rcu_config(void);
void gpio_config(void);
void i2c_config(void);
void i2c_nvic_config(void);
ErrStatus memory_compare(uint8_t *src, uint8_t *dst, uint16_t length);
/*!
\brief main function
\param[in] none
\param[out] none
\retval none
*/
int main(void)
{
uint8_t i;
/* initialize LED2, LED3, as the transfer instruction */
gd_eval_led_init(LED2);
gd_eval_led_init(LED3);
rcu_config();
gpio_config();
i2c_config();
i2c_nvic_config();
for(i = 0; i < 16; i++) {
i2c_buffer_transmitter[i] = i + 0x80;
}
/* initialize i2c_txbuffer, i2c_rxbuffer, I2C_nBytes and status */
i2c_txbuffer = i2c_buffer_transmitter;
i2c_rxbuffer = i2c_buffer_receiver;
I2C_nBytes = 16;
status = ERROR;
/* enable the I2C0 interrupt */
i2c_interrupt_enable(I2C0, I2C_INT_ERR);
i2c_interrupt_enable(I2C0, I2C_INT_BUF);
i2c_interrupt_enable(I2C0, I2C_INT_EV);
/* enable the I2C1 interrupt */
i2c_interrupt_enable(I2C1, I2C_INT_ERR);
i2c_interrupt_enable(I2C1, I2C_INT_BUF);
i2c_interrupt_enable(I2C1, I2C_INT_EV);
/* the master waits until the I2C bus is idle */
while(i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
/* the master sends a start condition to I2C bus */
i2c_start_on_bus(I2C0);
while((I2C_nBytes > 0));
while(SUCCESS != status);
/* if the transfer is successfully completed, LED2 and LED3 is on */
state = memory_compare(i2c_buffer_transmitter, i2c_buffer_receiver, 16);
if(SUCCESS == state) {
/* if success, LED2 and LED3 are on */
gd_eval_led_on(LED2);
gd_eval_led_on(LED3);
} else {
/* if failed, LED2 and LED3 are off */
gd_eval_led_off(LED2);
gd_eval_led_off(LED3);
}
while(1) {
}
}
void rcu_config(void)
{
/* enable GPIOB clock */
rcu_periph_clock_enable(RCU_GPIOB);
/* enable I2C1 clock */
rcu_periph_clock_enable(RCU_I2C1);
/* enable I2C0 clock */
rcu_periph_clock_enable(RCU_I2C0);
}
void gpio_config(void)
{
/* connect PB6 to I2C0_SCL */
/* connect PB7 to I2C0_SDA */
/* connect PB10 to I2C1_SCL */
/* connect PB11 to I2C1_SDA */
gpio_init(GPIOB, GPIO_MODE_AF_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_6 | GPIO_PIN_7 | GPIO_PIN_10 | GPIO_PIN_11);
}
void i2c_config(void)
{
/* configure I2C clock */
i2c_clock_config(I2C0, 100000, I2C_DTCY_2);
/* configure I2C address */
i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, I2C0_SLAVE_ADDRESS7);
/* enable I2C0 */
i2c_enable(I2C0);
/* enable acknowledge */
i2c_ack_config(I2C0, I2C_ACK_ENABLE);
i2c_clock_config(I2C1, 100000, I2C_DTCY_2);
/* configure I2C address */
i2c_mode_addr_config(I2C1, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, I2C1_SLAVE_ADDRESS7);
/* enable I2C1 */
i2c_enable(I2C1);
/* enable acknowledge */
i2c_ack_config(I2C1, I2C_ACK_ENABLE);
}
void i2c_nvic_config(void)
{
nvic_priority_group_set(NVIC_PRIGROUP_PRE1_SUB3);
nvic_irq_enable(I2C0_EV_IRQn, 0, 3);
nvic_irq_enable(I2C1_EV_IRQn, 0, 4);
nvic_irq_enable(I2C0_ER_IRQn, 0, 2);
nvic_irq_enable(I2C1_ER_IRQn, 0, 1);
}
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