Added SPI burst mode to spi 8 bit.
Dependents: Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG
Fork of UniGraphic by
Added SPI burst mode to this graphics driver. If whoever wants this rolled in to repository let me know. I replaced _spi.write(); with fastWrite(); and clearRX();
SPI8.cpp
// need to re-create SPI firmware to access SPI handle static SPI_HandleTypeDef SpiHandle; void SPI8::fastWrite(int data) { SpiHandle.Instance = SPI1; // Check if data is transmitted while ((SpiHandle.Instance->SR & SPI_SR_TXE) == 0); SpiHandle.Instance->DR = data; } void SPI8::clearRX( void ) { SpiHandle.Instance = SPI1; //Check if the RX buffer is busy //While busy, keep checking while (SpiHandle.Instance->SR & SPI_SR_BSY){ // Check RX buffer readable while ((SpiHandle.Instance->SR & SPI_SR_RXNE) == 0); int dummy = SpiHandle.Instance->DR; } }
Diff: Protocols/SPI16.cpp
- Revision:
- 11:b842b8e332cb
- Parent:
- 7:bb0383b91104
- Child:
- 20:14daa48ffd4c
diff -r 668cf78ff93a -r b842b8e332cb Protocols/SPI16.cpp --- a/Protocols/SPI16.cpp Thu Feb 19 00:33:27 2015 +0000 +++ b/Protocols/SPI16.cpp Fri Feb 20 21:32:25 2015 +0000 @@ -121,7 +121,7 @@ _CS = 1; #endif } -unsigned short SPI16::rd_gram() +unsigned short SPI16::rd_gram(bool convert) { #ifdef USE_CS _CS = 0; @@ -131,13 +131,17 @@ r |= _spi.write(0); // 16bit, whole first byte is dummy, second is red r <<= 16; r |= _spi.write(0); + if(convert) + { + // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit + // during reading, you read the raw 18bit gram + r = RGB24to16((r&0xFF0000)>>16, (r&0xFF00)>>8, r&0xFF);// 18bit pixel padded to 24bits, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit + } + else r >>= 8; _CS = 1; // force CS HIG to interupt the "read state" #ifndef USE_CS //if CS is not used, force fixed LOW again _CS = 0; #endif - // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit - // during reading, you read the raw 18bit gram - r = RGB18to16((r&0xFC0000)>>16, (r&0xFC00)>>8, r&0xFC);// 18bit pixel, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit return (unsigned short)r; } unsigned int SPI16::rd_reg_data32(unsigned char reg)