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#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
#include <stdio.h>
#define SPI_MASTER_CS_HIGH gpio_bits_set(GPIOA, GPIO_PINS_15)
#define SPI_MASTER_CS_LOW gpio_bits_reset(GPIOA, GPIO_PINS_15)
static void i2s_config(i2s_operation_mode_type i2s3_mode, i2s_operation_mode_type i2s2_mode)
{
i2s_init_type i2s_init_struct;
/* i2s3 initialization */
crm_periph_clock_enable(CRM_SPI3_PERIPH_CLOCK, TRUE);
spi_i2s_reset(SPI3);
i2s_default_para_init(&i2s_init_struct);
i2s_init_struct.audio_protocol = I2S_AUDIO_PROTOCOL_PHILLIPS;
i2s_init_struct.data_channel_format = I2S_DATA_16BIT_CHANNEL_32BIT;
i2s_init_struct.mclk_output_enable = FALSE;
i2s_init_struct.audio_sampling_freq = I2S_AUDIO_FREQUENCY_48K;
i2s_init_struct.clock_polarity = I2S_CLOCK_POLARITY_LOW;
i2s_init_struct.operation_mode = i2s3_mode;
i2s_init(SPI3, &i2s_init_struct);
/* i2s2 initialization */
crm_periph_clock_enable(CRM_SPI2_PERIPH_CLOCK, TRUE);
spi_i2s_reset(SPI2);
i2s_init_struct.audio_protocol = I2S_AUDIO_PROTOCOL_PHILLIPS;
i2s_init_struct.data_channel_format = I2S_DATA_16BIT_CHANNEL_32BIT;
i2s_init_struct.mclk_output_enable = FALSE;
i2s_init_struct.audio_sampling_freq = I2S_AUDIO_FREQUENCY_48K;
i2s_init_struct.clock_polarity = I2S_CLOCK_POLARITY_LOW;
i2s_init_struct.operation_mode =i2s2_mode;
i2s_init(SPI2, &i2s_init_struct);
}
static void spi_config(void)
{
spi_init_type spi_init_struct;
/* master spi initialization */
crm_periph_clock_enable(CRM_SPI3_PERIPH_CLOCK, TRUE);
spi_i2s_reset(SPI3);
spi_default_para_init(&spi_init_struct);
/* single line bidirectional half duplex mode-transmitting */
spi_init_struct.transmission_mode = SPI_TRANSMIT_HALF_DUPLEX_TX;
spi_init_struct.master_slave_mode =SPI_MODE_MASTER;
spi_init_struct.mclk_freq_division = SPI_MCLK_DIV_8;
spi_init_struct.first_bit_transmission = SPI_FIRST_BIT_MSB;
spi_init_struct.frame_bit_num = SPI_FRAME_16BIT;
spi_init_struct.clock_polarity = SPI_CLOCK_POLARITY_LOW;
spi_init_struct.clock_phase = SPI_CLOCK_PHASE_2EDGE;
spi_init_struct.cs_mode_selection = SPI_CS_SOFTWARE_MODE;
spi_init(SPI3, &spi_init_struct);
spi_enable(SPI3, TRUE);
/* slave spi initialization */
crm_periph_clock_enable(CRM_SPI2_PERIPH_CLOCK, TRUE);
spi_i2s_reset(SPI2);
/* dual line unidirectional simplex receive-only mode */
spi_init_struct.transmission_mode = SPI_TRANSMIT_SIMPLEX_RX;
spi_init_struct.master_slave_mode =SPI_MODE_SLAVE;
spi_init_struct.mclk_freq_division = SPI_MCLK_DIV_8;
spi_init_struct.first_bit_transmission = SPI_FIRST_BIT_MSB;
spi_init_struct.frame_bit_num = SPI_FRAME_16BIT;
spi_init_struct.clock_polarity = SPI_CLOCK_POLARITY_LOW;
spi_init_struct.clock_phase = SPI_CLOCK_PHASE_2EDGE;
spi_init_struct.cs_mode_selection = SPI_CS_HARDWARE_MODE;
spi_init(SPI2, &spi_init_struct);
spi_enable(SPI2, TRUE);
}
static void gpio_config(uint16_t spi_i2s_mode)
{
gpio_init_type gpio_initstructure;
crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);
gpio_pin_remap_config(SWJTAG_GMUX_010, TRUE);
/* master ws/cs pin */
gpio_initstructure.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_initstructure.gpio_pull = GPIO_PULL_UP;
gpio_initstructure.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_initstructure.gpio_pins = GPIO_PINS_15;
if(spi_i2s_mode == 0)
{
gpio_initstructure.gpio_mode = GPIO_MODE_OUTPUT;
}
else
{
gpio_initstructure.gpio_mode = GPIO_MODE_MUX;
}
gpio_init(GPIOA, &gpio_initstructure);
if(spi_i2s_mode == 0)
{
/* non communication time: master pull up CS pin release slave */
SPI_MASTER_CS_HIGH;
}
/* master ck pin */
gpio_initstructure.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_initstructure.gpio_pull = GPIO_PULL_DOWN;
gpio_initstructure.gpio_mode = GPIO_MODE_MUX;
gpio_initstructure.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_initstructure.gpio_pins = GPIO_PINS_3;
gpio_init(GPIOB, &gpio_initstructure);
/* master sd pin */
gpio_initstructure.gpio_pull = GPIO_PULL_UP;
gpio_initstructure.gpio_pins = GPIO_PINS_5;
gpio_init(GPIOB, &gpio_initstructure);
/* slave ws pin */
gpio_initstructure.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_initstructure.gpio_pull = GPIO_PULL_UP;
gpio_initstructure.gpio_mode = GPIO_MODE_MUX;
gpio_initstructure.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_initstructure.gpio_pins = GPIO_PINS_12;
gpio_init(GPIOB, &gpio_initstructure);
/* slave ck pin */
gpio_initstructure.gpio_pull = GPIO_PULL_DOWN;
gpio_initstructure.gpio_pins = GPIO_PINS_13;
gpio_init(GPIOB, &gpio_initstructure);
/* slave sd pin */
gpio_initstructure.gpio_pull = GPIO_PULL_UP;
gpio_initstructure.gpio_pins = GPIO_PINS_15;
gpio_init(GPIOB, &gpio_initstructure);
}
int main(void)
{
__IO uint32_t index = 0;
system_clock_config();
at32_board_init();
at32_led_on(LED4);
/* first: i2s communication */
gpio_config(1);
i2s_config(I2S_MODE_MASTER_TX, I2S_MODE_SLAVE_RX);
i2s_enable(SPI2, TRUE);
i2s_enable(SPI3, TRUE);
while(rx_index < 32)
{
/* i2s transmit data fill */
while(spi_i2s_flag_get(SPI3, SPI_I2S_TDBE_FLAG) == RESET);
spi_i2s_data_transmit(SPI3, i2s3_buffer_tx[tx_index++]);
/* i2s receive data get */
while(spi_i2s_flag_get(SPI2, SPI_I2S_RDBF_FLAG) == RESET);
i2s2_buffer_rx[rx_index++] = spi_i2s_data_receive(SPI2);
}
/* wait master and slave idle when communication end */
while(spi_i2s_flag_get(SPI3, SPI_I2S_BF_FLAG) != RESET);
while(spi_i2s_flag_get(SPI2, SPI_I2S_BF_FLAG) != RESET);
/* test result:the data check */
transfer_status1 = buffer_compare(i2s2_buffer_rx, i2s3_buffer_tx, 32);
/* receive buffer clear */
tx_index = 0;
rx_index = 0;
for(index = 0; index < 32; index++)
{
i2s2_buffer_rx[index] = 0;
}
/* second: spi communication */
gpio_config(0);
spi_config();
/* start communication: master pull down CS pin select slave */
SPI_MASTER_CS_LOW;
while(rx_index < 32)
{
/* spi transmit data fill */
while(spi_i2s_flag_get(SPI3, SPI_I2S_TDBE_FLAG) == RESET);
spi_i2s_data_transmit(SPI3, spi3_buffer_tx[tx_index++]);
/* spi receive data get */
while(spi_i2s_flag_get(SPI2, SPI_I2S_RDBF_FLAG) == RESET);
spi2_buffer_rx[rx_index++] = spi_i2s_data_receive(SPI2);
}
/* wait master and slave idle when communication end */
while(spi_i2s_flag_get(SPI3, SPI_I2S_BF_FLAG) != RESET);
while(spi_i2s_flag_get(SPI2, SPI_I2S_BF_FLAG) != RESET);
/* end communication: master pull up CS pin release slave */
SPI_MASTER_CS_HIGH;
/* test result:the data check */
transfer_status2 = buffer_compare(spi2_buffer_rx, spi3_buffer_tx, 32);
/* receive buffer clear */
tx_index = 0;
rx_index = 0;
for(index = 0; index < 32; index++)
{
i2s2_buffer_rx[index] = 0;
}
/* third: i2s communication */
gpio_config(1);
i2s_config(I2S_MODE_SLAVE_TX, I2S_MODE_MASTER_RX);
/* when slave transmission mode,the slave trans data need fill in advance */
while(spi_i2s_flag_get(SPI3, SPI_I2S_TDBE_FLAG) == RESET);
spi_i2s_data_transmit(SPI3, i2s3_buffer_tx[tx_index++]);
i2s_enable(SPI3, TRUE);
i2s_enable(SPI2, TRUE);
while(rx_index < 32)
{
/* i2s receive data get */
while(spi_i2s_flag_get(SPI2, SPI_I2S_RDBF_FLAG) == RESET);
i2s2_buffer_rx[rx_index++] = spi_i2s_data_receive(SPI2);
/* i2s transmit data fill */
while(spi_i2s_flag_get(SPI3, SPI_I2S_TDBE_FLAG) == RESET);
spi_i2s_data_transmit(SPI3, i2s3_buffer_tx[tx_index++]);
}
/* master half duplex receiving mode,the busy flag isnot usefull */
/* test result:the data check */
transfer_status3 = buffer_compare(i2s2_buffer_rx, i2s3_buffer_tx, 32);
/* test result indicate:if passed ,led2 lights */
if((transfer_status1 == SUCCESS) && (transfer_status2 == SUCCESS) && (transfer_status3 == SUCCESS))
{
at32_led_on(LED2);
}
else
{
at32_led_on(LED3);
}
while(1)
{
}
}
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