char CCRead(char addr, char* data)
{
char stat;
spi_select_device(&SPIC, &spi_device_conf);
while(PORTC.IN&PIN6_bm==PIN6_bm); //Wait for MISO to go low
spi_write_single(&SPIC, addr|0x80);
spi_read_single(&SPIC, &stat)
spi_write_single(&SPIC, CONFIG_SPI_MASTER_DUMMY);
spi_read_single(&SPIC, data);
spi_deselect_device(&SPIC, &spi_device_conf);
return stat;
};
/**
* \brief Receive a sequence of bytes from an SPI device.
*
* All bytes sent out on SPI bus are sent as value 0.
*
* \param p_spi Base address of the SPI instance.
* \param data Data buffer to read.
* \param len Length of data to be read.
*
* \pre SPI device must be selected with spi_select_device() first.
*/
status_code_t spi_read_packet(Spi *p_spi, uint8_t *data, size_t len)
{
uint32_t timeout = SPI_TIMEOUT;
uint8_t val;
uint32_t i = 0;
while (len) {
timeout = SPI_TIMEOUT;
while (!spi_is_tx_ready(p_spi)) {
if (!timeout--) {
return ERR_TIMEOUT;
}
}
spi_write_single(p_spi, CONFIG_SPI_MASTER_DUMMY);
timeout = SPI_TIMEOUT;
while (!spi_is_rx_ready(p_spi)) {
if (!timeout--) {
return ERR_TIMEOUT;
}
}
spi_read_single(p_spi, &val);
data[i] = val;
i++;
len--;
}
return STATUS_OK;
}
/**
* \internal
* \brief Helper function to read a byte from an arbitrary interface
*
* This function is used to hide what interface is used by the driver, e.g.
* the driver does not need to know if USART in SPI mode is used or the native
* SPI module.
*/
__always_inline static uint8_t hx8347a_read_byte(void)
{
uint8_t data;
#if defined(CONF_HX8347A_USART_SPI)
# if UC3
/* A workaround for optimizing data transfer had to be done for the
* XMEGA in order for the display to work correctly at all SPI clock
* clock speeds */
/* This function could also be used for XMEGA but results in a very slow
* framerate, hence a workaround has been implemented for the XMEGA */
usart_spi_read_packet(CONF_HX8347A_USART_SPI, &data, 1);
# elif XMEGA
usart_spi_read_single(CONF_HX8347A_USART_SPI, &data);
# endif
#elif defined(CONF_HX8347A_SPI)
spi_write_single(CONF_HX8347A_SPI, 0xFF);
/* Wait for RX to complete */
while (!spi_is_rx_full(CONF_HX8347A_SPI)) {
/* Do nothing */
}
spi_read_single(CONF_HX8347A_SPI, &data);
#endif
return data;
}
/**
* \internal
* \brief Helper function to read a byte from an arbitrary interface
*
* This function is used to hide what interface is used by the component
* driver, e.g. the component driver does not need to know if USART in SPI
* mode is used or the native SPI module.
*
* \retval uint8_t Byte of data read from the display controller
*/
__always_inline static uint8_t ili9341_read_byte(void)
{
uint8_t data;
#if defined(CONF_ILI9341_USART_SPI)
# if XMEGA
/* Workaround for clearing the RXCIF for XMEGA */
usart_rx_enable(CONF_ILI9341_USART_SPI);
usart_put(CONF_ILI9341_USART_SPI, 0xFF);
while (!usart_rx_is_complete(CONF_ILI9341_USART_SPI)) {
/* Do nothing */
}
data = usart_get(CONF_ILI9341_USART_SPI);
/* Workaround for clearing the RXCIF for XMEGA */
usart_rx_disable(CONF_ILI9341_USART_SPI);
# else
usart_spi_read_single(CONF_ILI9341_USART_SPI, &data);
# endif
#elif defined(CONF_ILI9341_SPI)
spi_write_single(CONF_ILI9341_SPI, 0xFF);
ili9341_wait_for_send_done();
/* Wait for RX to complete */
while (!spi_is_rx_full(CONF_ILI9341_SPI)) {
/* Do nothing */
}
spi_read_single(CONF_ILI9341_SPI, &data);
#endif
return data;
}
/**
* \brief Send and receive a sequence of bytes from an SPI device.
*
* \param p_spi Base address of the SPI instance.
* \param tx_data Data buffer to send.
* \param rx_data Data buffer to read.
* \param len Length of data to be read.
*
* \pre SPI device must be selected with spi_select_device() first.
*/
spi_status_t spi_transceive_packet(Spi *p_spi, uint8_t *tx_data, uint8_t *rx_data, size_t len)
{
uint32_t timeout = SPI_TIMEOUT;
uint8_t val;
uint32_t i = 0;
while (len) {
timeout = SPI_TIMEOUT;
while (!spi_is_tx_ready(p_spi)) {
if (!timeout--) {
return SPI_ERROR_TIMEOUT;
}
}
spi_write_single(p_spi, tx_data[i]);
timeout = SPI_TIMEOUT;
while (!spi_is_rx_ready(p_spi)) {
if (!timeout--) {
return SPI_ERROR_TIMEOUT;
}
}
spi_read_single(p_spi, &val);
rx_data[i] = val;
i++;
len--;
}
return SPI_OK;
}
/**
* \brief Receive a sequence of bytes from an SPI device.
*
* All bytes sent out on SPI bus are sent as value 0.
*
* \param p_spi Base address of the SPI instance.
* \param data Data buffer to read.
* \param len Length of data to be read.
*
* \pre SPI device must be selected with spi_select_device() first.
*/
spi_status_t spi_read_packet(Spi *p_spi, uint8_t *data, size_t len)
{
if (len-- == 0)
return SPI_OK;
for (uint16_t i = 0; i < len; i++)
{
uint32_t timeout = SPI_TIMEOUT;
while (!spi_is_tx_ready(p_spi)) {
if (!timeout--) {
return SPI_ERROR_TIMEOUT;
}
}
p_spi->SPI_TDR = 0x000000FF;
timeout = SPI_TIMEOUT;
while (!spi_is_rx_ready(p_spi)) {
if (!timeout--) {
return SPI_ERROR_TIMEOUT;
}
}
data[i] = p_spi->SPI_RDR;
}
return spi_read_single(p_spi, &data[len]);
}
/**
* \brief Receive a single byte from a SPI device
*
* byte sent out on SPI bus is sent as value 0.
*
* \param spi Base address of the SPI instance.
*
* \pre SPI device must be selected with spi_select_device() first
*/
uint8_t spi_read_once(SPI_t *spi)
{
uint8_t data;
spi_write_single(spi,CONFIG_SPI_MASTER_DUMMY); //Dummy write
while(!spi_is_rx_full(spi));
spi_read_single(spi,&data);
return data;
}
/**
* \brief Receive a sequence of bytes from a SPI device
*
* All bytes sent out on SPI bus are sent as value 0.
*
* \param spi Base address of the SPI instance.
* \param data data buffer to read
* \param len Length of data
*
* \pre SPI device must be selected with spi_select_device() first
*/
status_code_t spi_read_packet(SPI_t *spi, uint8_t *data, size_t len)
{
while(len) {
spi_write_single(spi,CONFIG_SPI_MASTER_DUMMY); //Dummy write
while(!spi_is_rx_full(spi));
spi_read_single(spi,data);
len--;
data++;
}
return STATUS_OK;
}
void AT42QT1110_spi_read_timeout(uint8_t* data, uint32_t timeout_us) {
uint32_t t = 0;
while (!spi_is_rx_full(SPI_TOUCH)) {
delay_us(1);
if(t++ > timeout_us) return;
}
t = 0;
spi_read_single(&SPI_TOUCH, data);
return;
}
char CCStrobe(char addr)
{
char stat;
spi_select_device(&SPIC, &spi_device_conf);
while(PORTC.IN&PIN6_bm==PIN6_bm); //Wait for MISO to go low
spi_write_single(&SPIC, addr);
spi_read_single(&SPIC, &stat);
spi_deselect_device(&SPIC, &spi_device_conf);
return stat;
}
uint8_t CS4270_read_data(void) {
uint8_t data;
spi_select_device(SPI_CODEC, &spi_device_codec);
spi_write_single(SPI_CODEC, CS4270_ADDRESS_READ);
spi_read_single(SPI_CODEC, &data);
spi_deselect_device(SPI_CODEC, &spi_device_codec);
return data;
}
char CCWriteBurst(char addr, const char* dataPtr, char size)
{
char stat;
spi_select_device(&SPIC, &spi_device_conf);
while(PORTC.IN&PIN6_bm==PIN6_bm); //Wait for MISO to go low
spi_write_single(&SPIC, addr|0x40);
spi_read_single(&SPIC, &stat);
spi_write_packet(&SPIC, *dataPtr, size);
spi_deselect_device(&SPIC, &spi_device_conf);
return stat;
}
/**
* \brief Send a command to the ADS7843 touch controller.
*
* \param uc_cmd command to send.
*
* \return Command result.
*/
static uint32_t ads7843_send_cmd(uint8_t uc_cmd)
{
uint32_t uResult = 0;
volatile uint32_t i;
uint8_t data;
uint32_t timeout = SPI_TIMEOUT;
/* (volatile declaration needed for code optimisation by compiler) */
volatile uint8_t bufferRX[ADS7843_BUFSIZE];
volatile uint8_t bufferTX[ADS7843_BUFSIZE];
bufferRX[0] = 0;
bufferRX[1] = 0;
bufferRX[2] = 0;
bufferTX[0] = uc_cmd;
bufferTX[1] = 0;
bufferTX[2] = 0;
for(i = 0; i < ADS7843_BUFSIZE; i++){
timeout = SPI_TIMEOUT;
while (!spi_is_tx_ready(BOARD_ADS7843_SPI_BASE)) {
if (!timeout--) {
return SPI_ERROR_TIMEOUT;
}
}
spi_write_single(BOARD_ADS7843_SPI_BASE, bufferTX[i]);
}
for(i = 0; i < ADS7843_BUFSIZE; i++){
timeout = SPI_TIMEOUT;
while (!spi_is_rx_full(BOARD_ADS7843_SPI_BASE)) {
if (!timeout--) {
return SPI_ERROR_TIMEOUT;
}
}
spi_read_single(BOARD_ADS7843_SPI_BASE, &data);
bufferRX[i] = data;
}
uResult = (uint32_t)bufferRX[1] << 8;
uResult |= (uint32_t)bufferRX[2];
uResult = uResult >> 4;
return uResult;
}
static sint8 spi_rw(uint8* pu8Mosi, uint8* pu8Miso, uint16 u16Sz)
{
struct spi_device spi_device_conf;
spi_device_conf.id = CONF_WIFI_M2M_SPI_CS_PIN;
uint8 u8Dummy = 0;
uint8 u8SkipMosi = 0, u8SkipMiso = 0;
uint16_t txd_data = 0;
uint16_t rxd_data = 0;
if (!pu8Mosi) {
pu8Mosi = &u8Dummy;
u8SkipMosi = 1;
}
else if(!pu8Miso) {
pu8Miso = &u8Dummy;
u8SkipMiso = 1;
}
else {
return M2M_ERR_BUS_FAIL;
}
spi_select_device(CONF_WIFI_M2M_SPI_MODULE, &spi_device_conf);
while (u16Sz) {
txd_data = *pu8Mosi;
/* Write one byte */
spi_write_packet(CONF_WIFI_M2M_SPI_MODULE, (uint8_t*)(&txd_data), 1);
/* Read SPI master data register. */
spi_read_single(CONF_WIFI_M2M_SPI_MODULE, (uint8_t*)(&rxd_data));
*pu8Miso = rxd_data;
u16Sz--;
if (!u8SkipMiso)
pu8Miso++;
if (!u8SkipMosi)
pu8Mosi++;
}
spi_deselect_device(CONF_WIFI_M2M_SPI_MODULE, &spi_device_conf);
return M2M_SUCCESS;
}
