Fork of RTOS_SPI that removes SimpleDMA from direct include to correct linker issues when using SimpleDMA twice Note that this library is still required!
Fork of RTOS_SPI by
RTOS_SPI_KL25.cpp@2:d052724e2ad6, 2014-06-27 (annotated)
- Committer:
- Tomo2k
- Date:
- Fri Jun 27 10:12:42 2014 +0000
- Revision:
- 2:d052724e2ad6
- Parent:
- 1:d021fb155bff
Added support for KL46
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Sissors | 1:d021fb155bff | 1 | #ifdef TARGET_KL25Z |
Sissors | 0:004e5e86de4e | 2 | #include "RTOS_SPI.h" |
Sissors | 0:004e5e86de4e | 3 | |
Sissors | 0:004e5e86de4e | 4 | RTOS_SPI::RTOS_SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused) : SPI(mosi, miso, sclk) { |
Sissors | 0:004e5e86de4e | 5 | if (_spi.spi == SPI0) { |
Sissors | 0:004e5e86de4e | 6 | read_dma.trigger(Trigger_SPI0_RX); |
Sissors | 0:004e5e86de4e | 7 | write_dma.trigger(Trigger_SPI0_TX); |
Sissors | 0:004e5e86de4e | 8 | } else { |
Sissors | 0:004e5e86de4e | 9 | read_dma.trigger(Trigger_SPI1_RX); |
Sissors | 0:004e5e86de4e | 10 | write_dma.trigger(Trigger_SPI1_TX); |
Sissors | 0:004e5e86de4e | 11 | } |
Sissors | 0:004e5e86de4e | 12 | |
Sissors | 0:004e5e86de4e | 13 | read_dma.source(&_spi.spi->D, false); |
Sissors | 0:004e5e86de4e | 14 | write_dma.destination(&_spi.spi->D, false); |
Sissors | 0:004e5e86de4e | 15 | }; |
Sissors | 0:004e5e86de4e | 16 | |
Tomo2k | 2:d052724e2ad6 | 17 | void RTOS_SPI::bulkInternal(uint8_t *read_data, const uint8_t *write_data, int length, bool read_inc, bool write_inc) { |
Sissors | 0:004e5e86de4e | 18 | aquire(); |
Sissors | 0:004e5e86de4e | 19 | _spi.spi->C2 |= SPI_C2_TXDMAE_MASK | SPI_C2_RXDMAE_MASK; |
Sissors | 0:004e5e86de4e | 20 | |
Sissors | 0:004e5e86de4e | 21 | read_dma.destination(read_data, read_inc); |
Sissors | 0:004e5e86de4e | 22 | if (write_inc) |
Sissors | 0:004e5e86de4e | 23 | write_dma.source(write_data+1, write_inc); |
Sissors | 0:004e5e86de4e | 24 | else |
Sissors | 0:004e5e86de4e | 25 | write_dma.source(write_data, write_inc); |
Sissors | 0:004e5e86de4e | 26 | |
Sissors | 0:004e5e86de4e | 27 | //simply start the read_dma |
Sissors | 0:004e5e86de4e | 28 | read_dma.start(length); |
Sissors | 0:004e5e86de4e | 29 | |
Sissors | 0:004e5e86de4e | 30 | //Write the first byte manually, since this is recommended method (and the normal method sends the first byte twice) |
Sissors | 0:004e5e86de4e | 31 | while((_spi.spi->S & SPI_S_SPTEF_MASK) == 0); |
Sissors | 0:004e5e86de4e | 32 | _spi.spi->D = write_data[0]; |
Sissors | 0:004e5e86de4e | 33 | |
Sissors | 0:004e5e86de4e | 34 | write_dma.wait(length-1); |
Sissors | 0:004e5e86de4e | 35 | while(read_dma.isBusy()); |
Sissors | 0:004e5e86de4e | 36 | |
Sissors | 0:004e5e86de4e | 37 | _spi.spi->C2 &= ~(SPI_C2_TXDMAE_MASK | SPI_C2_RXDMAE_MASK); |
Sissors | 1:d021fb155bff | 38 | } |
Sissors | 1:d021fb155bff | 39 | #endif |