bool Adafruit_BluefruitLE_SPI::sendPacket(uint16_t command, const uint8_t* buf, uint8_t count, uint8_t more_data)
{
// flush old response before sending the new command
if (more_data == 0) flush();
sdepMsgCommand_t msgCmd;
msgCmd.header.msg_type = SDEP_MSGTYPE_COMMAND;
msgCmd.header.cmd_id_high = highByte(command);
msgCmd.header.cmd_id_low = lowByte(command);
msgCmd.header.length = count;
msgCmd.header.more_data = (count == SDEP_MAX_PACKETSIZE) ? more_data : 0;
// Copy payload
if ( buf != NULL && count > 0) memcpy(msgCmd.payload, buf, count);
// Starting SPI transaction
if (m_sck_pin == -1)
SPI.beginTransaction(bluefruitSPI);
SPI_CS_ENABLE();
TimeoutTimer tt(_timeout);
// Bluefruit may not be ready
while ( ( spixfer(msgCmd.header.msg_type) == SPI_IGNORED_BYTE ) && !tt.expired() )
{
// Disable & Re-enable CS with a bit of delay for Bluefruit to ready itself
SPI_CS_DISABLE();
delayMicroseconds(SPI_DEFAULT_DELAY_US);
SPI_CS_ENABLE();
}
bool result = !tt.expired();
if ( result )
{
// transfer the rest of the data
spixfer((void*) (((uint8_t*)&msgCmd) +1), sizeof(sdepMsgHeader_t)+count-1);
}
SPI_CS_DISABLE();
if (m_sck_pin == -1)
SPI.endTransaction();
return result;
}
void Adafruit_SharpMem::toggleVcom(void)
{
if (_clk == -1)
SPI.beginTransaction(sharpmemSPI);
SPI_CS_ENABLE();
delayMicroseconds(SPI_DEFAULT_DELAY_US);
sendbyte(SHARPMEM_BIT_WRITECMD | _sharpmem_vcom);
TOGGLE_VCOM;
sendbyte(SHARPMEM_BIT_DUMMY);
delayMicroseconds(SPI_DEFAULT_DELAY_US);
SPI_CS_DISABLE();
if (_clk == -1)
SPI.endTransaction();
}
void Adafruit_SharpMem::refresh(void)
{
uint16_t i, totalbytes, currentline, oldline;
totalbytes = (SHARPMEM_LCDWIDTH * SHARPMEM_LCDHEIGHT) / 8;
if (_clk == -1)
SPI.beginTransaction(sharpmemSPI);
// Send the write command
SPI_CS_ENABLE();
delayMicroseconds(SPI_DEFAULT_DELAY_US);
sendbyte(SHARPMEM_BIT_WRITECMD | _sharpmem_vcom);
TOGGLE_VCOM;
// Send the address for line 1
oldline = currentline = 1;
sendbyte(currentline);
// Send image buffer
for (i=0; i<totalbytes; i++)
{
sendbyte(sharpmem_buffer[i]);
currentline = ((i+1)/(SHARPMEM_LCDWIDTH/8)) + 1;
if(currentline != oldline)
{
// Send end of line and address bytes
sendbyte(SHARPMEM_BIT_DUMMY);
if (currentline <= SHARPMEM_LCDHEIGHT)
{
sendbyte(currentline);
}
oldline = currentline;
}
}
// Send another trailing 8 bits for the last line
sendbyte(SHARPMEM_BIT_DUMMY);
delayMicroseconds(SPI_DEFAULT_DELAY_US);
SPI_CS_DISABLE();
if (_clk == -1)
SPI.endTransaction();
}
void Adafruit_SharpMem::clearDisplay(void)
{
memset(sharpmem_buffer, 0xff, (SHARPMEM_LCDWIDTH * SHARPMEM_LCDHEIGHT) / 8);
if (_clk == -1)
SPI.beginTransaction(sharpmemSPI);
// Send the clear screen command rather than doing a HW refresh (quicker)
SPI_CS_ENABLE();
delayMicroseconds(SPI_DEFAULT_DELAY_US);
sendbyte(_sharpmem_vcom | SHARPMEM_BIT_CLEAR);
sendbyte(SHARPMEM_BIT_DUMMY);
TOGGLE_VCOM;
delayMicroseconds(SPI_DEFAULT_DELAY_US);
SPI_CS_DISABLE();
if (_clk == -1)
SPI.endTransaction();
}
bool Adafruit_BluefruitLE_SPI::getPacket(sdepMsgResponse_t* p_response)
{
sdepMsgHeader_t* p_header = &p_response->header;
if (m_sck_pin == -1)
SPI.beginTransaction(bluefruitSPI);
SPI_CS_ENABLE();
TimeoutTimer tt(_timeout);
// Bluefruit may not be ready
while ( ( (p_header->msg_type = spixfer(0xff)) == SPI_IGNORED_BYTE ) && !tt.expired() )
{
// Disable & Re-enable CS with a bit of delay for Bluefruit to ready itself
SPI_CS_DISABLE();
delayMicroseconds(SPI_DEFAULT_DELAY_US);
SPI_CS_ENABLE();
}
bool result=false;
// Not a loop, just a way to avoid goto with error handling
do
{
if ( tt.expired() ) break;
// Look for the header
while ( p_header->msg_type != SDEP_MSGTYPE_RESPONSE && p_header->msg_type != SDEP_MSGTYPE_ERROR )
{
p_header->msg_type = spixfer(0xff);
}
memset( (&p_header->msg_type)+1, 0xff, sizeof(sdepMsgHeader_t) - 1);
spixfer((&p_header->msg_type)+1, sizeof(sdepMsgHeader_t) - 1);
// Command is 16-bit at odd address, may have alignment issue with 32-bit chip
uint16_t cmd_id = word(p_header->cmd_id_high, p_header->cmd_id_low);
// Error Message Response
if ( p_header->msg_type == SDEP_MSGTYPE_ERROR ) break;
// Invalid command
if (!(cmd_id == SDEP_CMDTYPE_AT_WRAPPER ||
cmd_id == SDEP_CMDTYPE_BLE_UARTTX ||
cmd_id == SDEP_CMDTYPE_BLE_UARTRX) )
{
break;
}
// Invalid length
if(p_header->length > SDEP_MAX_PACKETSIZE) break;
// read payload
memset(p_response->payload, 0xff, p_header->length);
spixfer(p_response->payload, p_header->length);
result = true;
} while(0);
SPI_CS_DISABLE();
if (m_sck_pin == -1)
SPI.endTransaction();
return result;
}
bool Adafruit_BluefruitLE_SPI::getPacket(sdepMsgResponse_t* p_response)
{
// Wait until IRQ is asserted, double timeout since some commands take long time to start responding
TimeoutTimer tt(2*_timeout);
while ( !digitalRead(m_irq_pin) ) {
if (tt.expired()) return false;
}
sdepMsgHeader_t* p_header = &p_response->header;
if (m_sck_pin == -1)
SPI.beginTransaction(bluefruitSPI);
SPI_CS_ENABLE();
tt.set(_timeout);
do {
if ( tt.expired() ) break;
p_header->msg_type = spixfer(0xff);
if (p_header->msg_type == SPI_IGNORED_BYTE)
{
// Bluefruit may not be ready
// Disable & Re-enable CS with a bit of delay for Bluefruit to ready itself
SPI_CS_DISABLE();
delayMicroseconds(SPI_DEFAULT_DELAY_US);
SPI_CS_ENABLE();
}
else if (p_header->msg_type == SPI_OVERREAD_BYTE)
{
// IRQ may not be pulled down by Bluefruit when returning all data in previous transfer.
// This could happen when Arduino MCU is running at fast rate comparing to Bluefruit's MCU,
// causing an SPI_OVERREAD_BYTE to be returned at stage.
//
// Walkaround: Disable & Re-enable CS with a bit of delay and keep waiting
// TODO IRQ is supposed to be OFF then ON, it is better to use GPIO trigger interrupt.
SPI_CS_DISABLE();
// wait for the clock to be enabled..
// while (!digitalRead(m_irq_pin)) {
// if ( tt.expired() ) break;
// }
// if (!digitalRead(m_irq_pin)) break;
delayMicroseconds(SPI_DEFAULT_DELAY_US);
SPI_CS_ENABLE();
}
} while (p_header->msg_type == SPI_IGNORED_BYTE || p_header->msg_type == SPI_OVERREAD_BYTE);
bool result=false;
// Not a loop, just a way to avoid goto with error handling
do
{
// Look for the header
// note that we should always get the right header at this point, and not doing so will really mess up things.
// This whole loop isn't needed with my fix above..
while ( p_header->msg_type != SDEP_MSGTYPE_RESPONSE && p_header->msg_type != SDEP_MSGTYPE_ERROR && !tt.expired() )
{
p_header->msg_type = spixfer(0xff);
}
if ( tt.expired() ) break;
memset( (&p_header->msg_type)+1, 0xff, sizeof(sdepMsgHeader_t) - 1);
spixfer((&p_header->msg_type)+1, sizeof(sdepMsgHeader_t) - 1);
// Command is 16-bit at odd address, may have alignment issue with 32-bit chip
uint16_t cmd_id = word(p_header->cmd_id_high, p_header->cmd_id_low);
// Error Message Response
if ( p_header->msg_type == SDEP_MSGTYPE_ERROR ) break;
// Invalid command
if (!(cmd_id == SDEP_CMDTYPE_AT_WRAPPER ||
cmd_id == SDEP_CMDTYPE_BLE_UARTTX ||
cmd_id == SDEP_CMDTYPE_BLE_UARTRX) )
{
break;
}
// Invalid length
if(p_header->length > SDEP_MAX_PACKETSIZE) break;
// read payload
memset(p_response->payload, 0xff, p_header->length);
spixfer(p_response->payload, p_header->length);
result = true;
}while(0);
SPI_CS_DISABLE();
if (m_sck_pin == -1)
SPI.endTransaction();
return result;
}
