diff options
| author | Luke T. Shumaker <lukeshu@lukeshu.com> | 2025-02-24 22:54:30 -0700 |
|---|---|---|
| committer | Luke T. Shumaker <lukeshu@lukeshu.com> | 2025-03-04 00:10:03 -0700 |
| commit | c336bf7f2205131c86e6d2991770a2c150d85ca9 (patch) | |
| tree | 963a91e278aaaa7ea7648a5e00043aca40ba8731 /libhw/rp2040_include | |
| parent | fb73355711c99003c559df48164a1ce6db93cff9 (diff) | |
libhw: rp2040_hwspi: Use DMA
Diffstat (limited to 'libhw/rp2040_include')
| -rw-r--r-- | libhw/rp2040_include/libhw/rp2040_hwspi.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/libhw/rp2040_include/libhw/rp2040_hwspi.h b/libhw/rp2040_include/libhw/rp2040_hwspi.h index fef1dbd..f90c1af 100644 --- a/libhw/rp2040_include/libhw/rp2040_hwspi.h +++ b/libhw/rp2040_include/libhw/rp2040_hwspi.h @@ -25,6 +25,10 @@ struct rp2040_hwspi { uint64_t min_delay_ns; uint8_t bogus_data; uint pin_cs; + uint dma_tx_data; + uint dma_tx_ctrl; + uint dma_rx_data; + uint dma_rx_ctrl; /* mutable */ uint64_t dead_until_ns; @@ -47,6 +51,7 @@ LO_IMPLEMENTATION_H(spi, struct rp2040_hwspi, rp2040_hwspi) * @param pin_mosi : uint : pin number; 3, 7, 19, or 23 for _HWSPI_0; 11, 15, or 27 for _HWSPI_1 * @param pin_clk : uint : pin number; 2, 6, 18, or 22 for _HWSPI_0; 10, 14, or 26 for _HWSPI_1 * @param pin_cs : uint : pin number; any unused GPIO pin + * @param dma{1-4} : uint : DMA channel; any unused channel * * There is no bit-order argument; the RP2040's hardware SPI always * uses MSB-first bit order. @@ -76,7 +81,8 @@ LO_IMPLEMENTATION_H(spi, struct rp2040_hwspi, rp2040_hwspi) #define rp2040_hwspi_init(self, name, \ inst_num, mode, baudrate_hz, \ min_delay_ns, bogus_data, \ - pin_miso, pin_mosi, pin_clk, pin_cs) \ + pin_miso, pin_mosi, pin_clk, pin_cs, \ + dma1, dma2, dma3, dma4) \ do { \ bi_decl(bi_4pins_with_names(pin_miso, name" SPI MISO", \ pin_mosi, name" SPI MOSI", \ @@ -85,7 +91,8 @@ LO_IMPLEMENTATION_H(spi, struct rp2040_hwspi, rp2040_hwspi) _rp2040_hwspi_init(self, \ inst_num, mode, baudrate_hz, \ min_delay_ns, bogus_data, \ - pin_miso, pin_mosi, pin_clk, pin_cs); \ + pin_miso, pin_mosi, pin_clk, pin_cs, \ + dma1, dma2, dma3, dma4); \ } while(0) void _rp2040_hwspi_init(struct rp2040_hwspi *self, enum rp2040_hwspi_instance inst_num, @@ -96,6 +103,10 @@ void _rp2040_hwspi_init(struct rp2040_hwspi *self, uint pin_miso, uint pin_mosi, uint pin_clk, - uint pin_cs); + uint pin_cs, + uint dma1, + uint dma2, + uint dma3, + uint dma4); #endif /* _LIBHW_RP2040_HWSPI_H_ */ |