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Added sendCommand for SPI abstraction

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This commit is contained in:
Melissa LeBlanc-Williams 2019-04-12 22:48:39 -07:00
parent 253e30d6eb
commit 5b992cda51
2 changed files with 59 additions and 0 deletions
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56
Adafruit_SPITFT.cpp
View File

@ -1632,6 +1632,62 @@ uint16_t Adafruit_SPITFT::color565(uint8_t red, uint8_t green, uint8_t blue) {
return ((red & 0xF8) << 8) | ((green & 0xFC) << 3) | (blue >> 3);
}
/*!
@brief Adafruit_SPITFT Send Command handles complete sending of a command
@param commandByte The Command Byte
*/
void Adafruit_SPITFT::sendCommand(uint8_t commandByte) {
uint8_t dataBytes = NULL;
sendCommand(commandByte, &dataBytes, 0);
}
/*!
@brief Adafruit_SPITFT Send Command handles complete sending of commands and data
@param commandByte The Command Byte
@param dataBytes A pointer to the Data bytes to send
@param numDataBytes The number of bytes we should send
*/
void Adafruit_SPITFT::sendCommand(uint8_t commandByte, uint8_t *dataBytes, uint8_t numDataBytes) {
SPI_BEGIN_TRANSACTION();
if(_cs >= 0) SPI_CS_LOW();
SPI_DC_LOW(); // Command mode
spiWrite(commandByte); // Send the command byte
SPI_DC_HIGH();
for (int i=0; i<numDataBytes; i++) {
spiWrite(dataBytes); // Send the data bytes
dataBytes++;
}
if(_cs >= 0) SPI_CS_HIGH();
SPI_END_TRANSACTION();
}
/*!
@brief Adafruit_SPITFT Send Command handles complete sending of commands and const data
@param commandByte The Command Byte
@param dataBytes A pointer to the Data bytes to send
@param numDataBytes The number of bytes we should send
*/
void Adafruit_SPITFT::sendCommand(uint8_t commandByte, const uint8_t *dataBytes, uint8_t numDataBytes) {
SPI_BEGIN_TRANSACTION();
if(_cs >= 0) SPI_CS_LOW();
SPI_DC_LOW(); // Command mode
// Send the command byte
spiWrite(commandByte);
SPI_DC_HIGH();
for (int i=0; i<numDataBytes; i++) {
// Send the data bytes
spiWrite(dataBytes);
}
if(_cs >= 0) SPI_CS_HIGH();
SPI_END_TRANSACTION();
}
// -------------------------------------------------------------------------
// Lowest-level hardware-interfacing functions. Many of these are inline and

3
Adafruit_SPITFT.h
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@ -187,6 +187,9 @@ class Adafruit_SPITFT : public Adafruit_GFX {
void startWrite(void);
// Chip deselect and/or hardware SPI transaction end as needed:
void endWrite(void);
void sendCommand(uint8_t commandByte);
void sendCommand(uint8_t commandByte, uint8_t *dataBytes, uint8_t numDataBytes);
void sendCommand(uint8_t commandByte, const uint8_t *dataBytes, uint8_t numDataBytes);
// These functions require a chip-select and/or SPI transaction
// around them. Higher-level graphics primitives might start a