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#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
#include "i2c_application.h"
#define I2C_TIMEOUT 0xFFFFFFFF
#define I2Cx_SPEED 100000
#define I2Cx_ADDRESS 0xA0
#define I2Cx_PORT I2C2
#define I2Cx_CLK CRM_I2C2_PERIPH_CLOCK
#define I2Cx_SCL_PIN GPIO_PINS_10
#define I2Cx_SCL_GPIO_PORT GPIOB
#define I2Cx_SCL_GPIO_CLK CRM_GPIOB_PERIPH_CLOCK
#define I2Cx_SDA_PIN GPIO_PINS_11
#define I2Cx_SDA_GPIO_PORT GPIOB
#define I2Cx_SDA_GPIO_CLK CRM_GPIOB_PERIPH_CLOCK
#define I2Cx_DMA_CLK CRM_DMA1_PERIPH_CLOCK
#define I2Cx_DMA_TX_CHANNEL DMA1_CHANNEL4
#define I2Cx_DMA_TX_IRQn DMA1_Channel4_IRQn
#define I2Cx_DMA_RX_CHANNEL DMA1_CHANNEL5
#define I2Cx_DMA_RX_IRQn DMA1_Channel5_IRQn
#define I2Cx_EVT_IRQn I2C2_EVT_IRQn
#define I2Cx_ERR_IRQn I2C2_ERR_IRQn
#define BUF_SIZE 8
void i2c_lowlevel_init(i2c_handle_type* hi2c)
{
gpio_init_type gpio_initstructure;
if(hi2c->i2cx == I2Cx_PORT)
{
/* i2c periph clock enable */
crm_periph_clock_enable(I2Cx_CLK, TRUE);
crm_periph_clock_enable(I2Cx_SCL_GPIO_CLK, TRUE);
crm_periph_clock_enable(I2Cx_SDA_GPIO_CLK, TRUE);
/* gpio configuration */
gpio_initstructure.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN;
gpio_initstructure.gpio_pull = GPIO_PULL_NONE;
gpio_initstructure.gpio_mode = GPIO_MODE_MUX;
gpio_initstructure.gpio_drive_strength = GPIO_DRIVE_STRENGTH_MODERATE;
/* configure i2c pins: scl */
gpio_initstructure.gpio_pins = I2Cx_SCL_PIN;
gpio_init(I2Cx_SCL_GPIO_PORT, &gpio_initstructure);
/* configure i2c pins: sda */
gpio_initstructure.gpio_pins = I2Cx_SDA_PIN;
gpio_init(I2Cx_SDA_GPIO_PORT, &gpio_initstructure);
/* configure and enable i2c dma channel interrupt */
nvic_irq_enable(I2Cx_DMA_TX_IRQn, 0, 0);
nvic_irq_enable(I2Cx_DMA_RX_IRQn, 0, 0);
/* configure and enable i2c interrupt */
nvic_irq_enable(I2Cx_EVT_IRQn, 0, 0);
nvic_irq_enable(I2Cx_ERR_IRQn, 0, 0);
/* i2c dma tx and rx channels configuration */
/* enable the dma clock */
crm_periph_clock_enable(I2Cx_DMA_CLK, TRUE);
/* i2c dma channel configuration */
hi2c->dma_tx_channel = I2Cx_DMA_TX_CHANNEL;
hi2c->dma_rx_channel = I2Cx_DMA_RX_CHANNEL;
dma_reset(hi2c->dma_tx_channel);
dma_reset(hi2c->dma_rx_channel);
dma_default_para_init(&hi2c->dma_init_struct);
hi2c->dma_init_struct.peripheral_inc_enable = FALSE;
hi2c->dma_init_struct.memory_inc_enable = TRUE;
hi2c->dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_BYTE;
hi2c->dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_BYTE;
hi2c->dma_init_struct.loop_mode_enable = FALSE;
hi2c->dma_init_struct.priority = DMA_PRIORITY_LOW;
hi2c->dma_init_struct.direction = DMA_DIR_MEMORY_TO_PERIPHERAL;
dma_init(hi2c->dma_tx_channel, &hi2c->dma_init_struct);
dma_init(hi2c->dma_rx_channel, &hi2c->dma_init_struct);
i2c_init(hi2c->i2cx, I2C_FSMODE_DUTY_2_1, I2Cx_SPEED);
i2c_own_address1_set(hi2c->i2cx, I2C_ADDRESS_MODE_7BIT, I2Cx_ADDRESS);
}
}
int main(void)
{
i2c_status_type i2c_status;
/* config nvic priority group */
nvic_priority_group_config(NVIC_PRIORITY_GROUP_4);
system_clock_config();
at32_board_init();
hi2cx.i2cx = I2Cx_PORT;
i2c_config(&hi2cx);
while(1)
{
/* wait for key USER_BUTTON press before starting the communication */
while(at32_button_press() != USER_BUTTON)
{
}
/* write data to memory device */
if((i2c_status = i2c_memory_write(&hi2cx, I2C_MEM_ADDR_WIDIH_8, I2Cx_ADDRESS, 0x00, tx_buf1, BUF_SIZE, I2C_TIMEOUT)) != I2C_OK)
{
error_handler(i2c_status);
}
delay_ms(5);
/* read data from memory device */
if((i2c_status = i2c_memory_read(&hi2cx, I2C_MEM_ADDR_WIDIH_8, I2Cx_ADDRESS, 0x00, rx_buf1, BUF_SIZE, I2C_TIMEOUT)) != I2C_OK)
{
error_handler(i2c_status);
}
/* write data to memory device */
if((i2c_status = i2c_memory_write_int(&hi2cx, I2C_MEM_ADDR_WIDIH_8, I2Cx_ADDRESS, 0x00, tx_buf2, BUF_SIZE, I2C_TIMEOUT)) != I2C_OK)
{
error_handler(i2c_status);
}
/* wait for the communication to end */
if(i2c_wait_end(&hi2cx, I2C_TIMEOUT) != I2C_OK)
{
error_handler(i2c_status);
}
delay_ms(5);
/* read data from memory device */
if((i2c_status = i2c_memory_read_int(&hi2cx, I2C_MEM_ADDR_WIDIH_8, I2Cx_ADDRESS, 0x00, rx_buf2, BUF_SIZE, I2C_TIMEOUT)) != I2C_OK)
{
error_handler(i2c_status);
}
/* wait for the communication to end */
if(i2c_wait_end(&hi2cx, I2C_TIMEOUT) != I2C_OK)
{
error_handler(i2c_status);
}
/* write data to memory device */
if((i2c_status = i2c_memory_write_dma(&hi2cx, I2C_MEM_ADDR_WIDIH_8, I2Cx_ADDRESS, 0x00, tx_buf3, BUF_SIZE, I2C_TIMEOUT)) != I2C_OK)
{
error_handler(i2c_status);
}
/* wait for the communication to end */
if(i2c_wait_end(&hi2cx, I2C_TIMEOUT) != I2C_OK)
{
error_handler(i2c_status);
}
delay_ms(5);
/* read data from memory device */
if((i2c_status = i2c_memory_read_dma(&hi2cx, I2C_MEM_ADDR_WIDIH_8, I2Cx_ADDRESS, 0x00, rx_buf3, BUF_SIZE, I2C_TIMEOUT)) != I2C_OK)
{
error_handler(i2c_status);
}
/* wait for the communication to end */
if(i2c_wait_end(&hi2cx, I2C_TIMEOUT) != I2C_OK)
{
error_handler(i2c_status);
}
if((buffer_compare(tx_buf1, rx_buf1, BUF_SIZE) == 0) &&
(buffer_compare(tx_buf2, rx_buf2, BUF_SIZE) == 0) &&
(buffer_compare(tx_buf3, rx_buf3, BUF_SIZE) == 0))
{
at32_led_on(LED3);
}
else
{
error_handler(i2c_status);
}
}
}
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