//向SSD1306写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(uint8_t dat,uint8_t cmd)
{
//uint8_t i;
spi0_tx_data[0]=dat;
if(cmd)
OLED_RS_Set();
else
OLED_RS_Clr();
#if 0
OLED_CS_Clr();
for(i=0;i<8;i++)
{
OLED_SCLK_Clr();
if(dat&0x80)
OLED_SDIN_Set();
else
OLED_SDIN_Clr();
OLED_SCLK_Set();
dat<<=1;
}
OLED_CS_Set();
#endif
//NRF_SPI0
if(!spi_master_tx_rx(spi_base_address, 1, (const uint8_t *)spi0_tx_data, (uint8_t*) spi0_rx_data))
// if(!spi_master_tx_rx(NRF_SPI0, 1, (const uint8_t *)spi0_tx_data, (uint8_t*) spi0_rx_data))
{
return ;
}
OLED_RS_Set();
}
/**@brief Receive bytes from the card
*
* @param[in] data Pointer to where to save the data received.
* @param[in] bytes Number of bytes to receive.
*/
void receive_mmc(uint8_t *data, uint32_t bytes){
uint8_t tx[bytes];
for(uint32_t i = 0; i < bytes; i++)
tx[i] = 0xFF;
spi_master_tx_rx(sdcard_spi_addr, bytes, tx, data);
}
/**@brief Function for executing a single SPI transaction.
*
* @retval true Operation success.
* @retval false Operation failure.
*/
static bool test_spi_tx_rx(void)
{
uint8_t tx_data[TX_RX_BUF_LENGTH] = {0};
uint8_t rx_data[TX_RX_BUF_LENGTH] = {0};
uint32_t * p_spi_base_address = spi_master_init(SPI0, SPI_MODE0, true);
if (p_spi_base_address == NULL)
{
return false;
}
return spi_master_tx_rx(p_spi_base_address, TX_RX_BUF_LENGTH, tx_data, rx_data);
}
int read_register(uint8_t register_address, int num_bytes, uint8_t* values)
{
if(num_bytes > 1) // (uint8_t*)values
tx_data[0] = 0xC0 | register_address;
else
tx_data[0] = 0x80 | register_address;
if(!spi_master_tx_rx(spi_ba, num_bytes, tx_data, values))
{
return -1;
}
return 0;
}
int write_register(uint8_t register_address, uint8_t value)
{
uint8_t tx[2];
tx[0] = register_address;
tx[1] = value;
uint8_t rx[2];
if(!spi_master_tx_rx( spi_ba, 2, tx, rx))
{
return -1;
}
return 0;
}
/**@brief Send bytes to the card
*
* @param[in] data Pointer to the data to be sent.
* @param[in] bytes Number of bytes to be sent.
*/
void send_mmc(const uint8_t *data, uint32_t bytes){
uint8_t rx[bytes];
spi_master_tx_rx(sdcard_spi_addr, bytes, data, rx);
}