/*!
\brief main routine
\param[in] none
\param[out] none
\retval none
*/
int main(void)
{
/* system clocks configuration */
rcu_config();
/* GPIO configuration */
gpio_config();
/* USB device configuration */
usbd_core_init(&usb_device_dev);
/* NVIC configuration */
nvic_config();
/* enabled USB pull-up */
gpio_bit_set(USB_PULLUP, USB_PULLUP_PIN);
/* now the usb device is connected */
usb_device_dev.status = USBD_CONNECTED;
while (1)
{
if (USBD_CONFIGURED == usb_device_dev.status) {
cdc_acm_data_receive(&usb_device_dev);
if (0 != receive_length) {
if (1 == packet_sent) {
cdc_acm_data_send(&usb_device_dev, receive_length);
receive_length = 0;
}
}
}
}
}
static int rt_hw_spi5_init(void)
{
/* register spi bus */
{
rt_err_t result;
rcu_periph_clock_enable(RCU_GPIOG);
rcu_periph_clock_enable(RCU_SPI5);
/* SPI5_CLK(PG13), SPI5_MISO(PG12), SPI5_MOSI(PG14),SPI5_IO2(PG10) and SPI5_IO3(PG11) GPIO pin configuration */
gpio_af_set(GPIOG, GPIO_AF_5, GPIO_PIN_10|GPIO_PIN_11| GPIO_PIN_12|GPIO_PIN_13| GPIO_PIN_14);
gpio_mode_set(GPIOG, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_10|GPIO_PIN_11| GPIO_PIN_12|GPIO_PIN_13| GPIO_PIN_14);
gpio_output_options_set(GPIOG, GPIO_OTYPE_PP, GPIO_OSPEED_200MHZ, GPIO_PIN_10|GPIO_PIN_11| GPIO_PIN_12|GPIO_PIN_13| GPIO_PIN_14);
result = gd32_spi_bus_register(SPI5, SPI_BUS_NAME);
if (result != RT_EOK)
{
return result;
}
}
/* attach cs */
{
static struct rt_spi_device spi_device;
static struct gd32_spi_cs spi_cs;
rt_err_t result;
spi_cs.GPIOx = GPIOG;
spi_cs.GPIO_Pin = GPIO_PIN_9;
/* SPI5_CS(PG9) GPIO pin configuration */
gpio_mode_set(GPIOG, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_9);
gpio_output_options_set(GPIOG, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9);
gpio_bit_set(GPIOG,GPIO_PIN_9);
result = rt_spi_bus_attach_device(&spi_device, SPI_FLASH_DEVICE_NAME, SPI_BUS_NAME, (void*)&spi_cs);
if (result != RT_EOK)
{
return result;
}
}
return RT_EOK;
}
/*!
\brief main routine will construct a MSC device
\param[in] none
\param[out] none
\retval none
*/
int main(void)
{
/* system clocks configuration */
rcu_config();
/* GPIO configuration */
gpio_config();
/* USB device configuration */
usbd_core_init(&usb_device_dev);
/* NVIC configuration */
nvic_config();
/* enabled USB pull-up */
gpio_bit_set(USB_PULLUP, USB_PULLUP_PIN);
/* now the usb device is connected */
usb_device_dev.status = USBD_CONNECTED;
while(usb_device_dev.status != USBD_CONFIGURED);
while (1){}
}
static rt_uint32_t xfer(struct rt_spi_device* device, struct rt_spi_message* message)
{
struct rt_spi_bus * gd32_spi_bus = (struct rt_spi_bus *)device->bus;
struct gd32f4_spi *f4_spi = (struct gd32f4_spi *)gd32_spi_bus->parent.user_data;
struct rt_spi_configuration * config = &device->config;
struct gd32_spi_cs * gd32_spi_cs = device->parent.user_data;
uint32_t spi_periph = f4_spi->spi_periph;
RT_ASSERT(device != NULL);
RT_ASSERT(message != NULL);
/* take CS */
if(message->cs_take)
{
gpio_bit_reset(gd32_spi_cs->GPIOx, gd32_spi_cs->GPIO_Pin);
DEBUG_PRINTF("spi take cs\n");
}
{
if(config->data_width <= 8)
{
const rt_uint8_t * send_ptr = message->send_buf;
rt_uint8_t * recv_ptr = message->recv_buf;
rt_uint32_t size = message->length;
DEBUG_PRINTF("spi poll transfer start: %d\n", size);
while(size--)
{
rt_uint8_t data = 0xFF;
if(send_ptr != RT_NULL)
{
data = *send_ptr++;
}
// Todo: replace register read/write by gd32f4 lib
//Wait until the transmit buffer is empty
while(RESET == spi_i2s_flag_get(spi_periph, SPI_FLAG_TBE));
// Send the byte
spi_i2s_data_transmit(spi_periph, data);
//Wait until a data is received
while(RESET == spi_i2s_flag_get(spi_periph, SPI_FLAG_RBNE));
// Get the received data
data = spi_i2s_data_receive(spi_periph);
if(recv_ptr != RT_NULL)
{
*recv_ptr++ = data;
}
}
DEBUG_PRINTF("spi poll transfer finsh\n");
}
else if(config->data_width <= 16)
{
const rt_uint16_t * send_ptr = message->send_buf;
rt_uint16_t * recv_ptr = message->recv_buf;
rt_uint32_t size = message->length;
while(size--)
{
rt_uint16_t data = 0xFF;
if(send_ptr != RT_NULL)
{
data = *send_ptr++;
}
//Wait until the transmit buffer is empty
while(RESET == spi_i2s_flag_get(spi_periph, SPI_FLAG_TBE));
// Send the byte
spi_i2s_data_transmit(spi_periph, data);
//Wait until a data is received
while(RESET == spi_i2s_flag_get(spi_periph, SPI_FLAG_RBNE));
// Get the received data
data = spi_i2s_data_receive(spi_periph);
if(recv_ptr != RT_NULL)
{
*recv_ptr++ = data;
}
}
}
}
/* release CS */
if(message->cs_release)
{
gpio_bit_set(gd32_spi_cs->GPIOx, gd32_spi_cs->GPIO_Pin);
DEBUG_PRINTF("spi release cs\n");
}
return message->length;
};
