diff options
| -rw-r--r-- | libhw/rp2040_hwspi.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/libhw/rp2040_hwspi.c b/libhw/rp2040_hwspi.c index 8c87666..bdfaa62 100644 --- a/libhw/rp2040_hwspi.c +++ b/libhw/rp2040_hwspi.c @@ -15,6 +15,14 @@ LO_IMPLEMENTATION_C(io_duplex_readwriter, struct rp2040_hwspi, rp2040_hwspi, static) LO_IMPLEMENTATION_C(spi, struct rp2040_hwspi, rp2040_hwspi, static) +#define assert_4distinct(a, b, c, d) \ + assert(a != b); \ + assert(a != c); \ + assert(a != d); \ + assert(b != c); \ + assert(b != d); \ + assert(c != d); + void _rp2040_hwspi_init(struct rp2040_hwspi *self, enum rp2040_hwspi_instance inst_num, enum spi_mode mode, @@ -29,12 +37,7 @@ void _rp2040_hwspi_init(struct rp2040_hwspi *self, assert(self); assert(baudrate_hz); - assert(pin_miso != pin_mosi); - assert(pin_miso != pin_clk); - assert(pin_miso != pin_cs); - assert(pin_mosi != pin_clk); - assert(pin_mosi != pin_cs); - assert(pin_clk != pin_cs); + assert_4distinct(pin_miso, pin_mosi, pin_clk, pin_cs); /* Regarding the constraints on pin assignments: see the * RP2040 datasheet, table 2, in ยง1.4.3 "GPIO Functions". */ |